WO2005113435A1 - 球状活性炭およびその製造方法 - Google Patents
球状活性炭およびその製造方法 Download PDFInfo
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- WO2005113435A1 WO2005113435A1 PCT/JP2005/008886 JP2005008886W WO2005113435A1 WO 2005113435 A1 WO2005113435 A1 WO 2005113435A1 JP 2005008886 W JP2005008886 W JP 2005008886W WO 2005113435 A1 WO2005113435 A1 WO 2005113435A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/336—Preparation characterised by gaseous activating agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/384—Granulation
Definitions
- the present invention relates to a spherical activated carbon. More specifically, the present invention relates to a spherical activated carbon having high hardness and made from a non-melting solid carbonaceous material.
- Activated carbon has excellent ability to adsorb various harmful substances and odorous substances, and has been used as an adsorbent in many fields regardless of whether it is for home use or industrial use.
- Such activated carbon is used in various forms, such as powdery and granular molded articles, depending on its use.
- crushed or pelletized activated carbon Since the crushed or pellet-shaped shape has an edge portion, it may be damaged during filling in a container or used for a long time. It is difficult to minimize the generation of dust resulting from the loss of the edge when subjected to vibration. In addition, pressure loss tends to increase due to irregular filling. On the other hand, if a molded article in the shape of a cam is used, for example, the problem of dust generation can be reduced. It is not possible to secure a sufficient surface area as much as it is filled, so that the adsorption capacity tends to be poor.
- a spherical shape is desired to satisfy the above-mentioned required performance. Since there is no edge in the shape of spherical activated carbon, there is little concern about dust generation due to crushing when filling the container, and there is little concern about irregular flow or increased pressure loss due to irregular filling. Furthermore, a spherical shape has good fluidity when it is used by flowing it, so that it can be easily filled when filling into a container of a complicated shape, and the fluid is formed by flowing activated carbon. It can be suitably used for processing.
- Spherical activated carbon can be roughly classified according to the manufacturing method.
- Patent Document 1 Japanese Patent Publication No. 50-018879
- Patent Document 2 Japanese Patent Application Laid-Open No. 55-113608 disclose a method of dispersing a raw material in a dispersion medium such as water to form spherical particles and then activating carbonization.
- Japanese Patent Application Laid-Open Publication No. H11-176,086 describes a method for producing spherical carbon or spherical activated carbon in which a pitch-based raw material is melted, dispersed and granulated, then infusibilized, carbonized, and activated.
- Patent Document 3 Japanese Patent Application Laid-Open No. 03-030834
- Patent Document 4 Japanese Patent Application Publication No.
- Patent Document 5 Japanese Patent Application Laid-Open No. 50-51996) disclose raw material powder and binder. It describes a method of forming carbon into a spherical shape and then activating carbonization, and an activated carbon obtained by the method.
- Patent Document 1 Japanese Patent Publication No. 50-018879
- Patent Document 2 JP-A-55-113608
- Patent Document 3 JP-A-03-030834
- Patent Document 4 Japanese Patent Publication No. 46-41210
- Patent Document 5 JP-A-50-51996
- Non-patent document 1 Gas world Coking section, 111 (1939) p. 106—111,
- Patent Literature 1 and Patent Literature 2 an original liquid state under operating conditions In the method of dispersing the material in a dispersion medium to form a spheroid, the hardness is high and activated carbon is easily obtained.
- the mixture needs to be liquid at the stage of dispersing in the dispersion medium, petroleum pitch It is necessary to use fusible raw materials, and general-purpose carbon materials such as coconut shell and ordinary coal cannot be used as main raw materials.
- a solvent is used to increase the fluidity, but in this case, an extra step such as removal of the solvent is required, and the step becomes complicated.
- Patent Documents 3, 4, and 5 disclose a method for producing a spherical activated carbon in which raw material powder and a binder are formed into a sphere and then activated by carbonization, or an activated carbon produced by the production method. . According to these methods, it is possible to produce activated carbon having a particle size of several mm in diameter using insoluble solid carbonaceous raw materials such as coconut shell charcoal and coal. Since it contains many microscopic voids, it is possible to activate the interior. However, the spherical activated carbon produced by these methods has the disadvantage that the packing density is low, the hardness is low, and the dust generation is high.
- an object of the present invention is to provide a non-melting solid carbonaceous material as a raw material, which is used for preventing vapourization of automobile fuel and the like.
- An object of the present invention is to provide a spherical activated carbon with low loss.
- the present inventors have conducted intensive studies on a method for producing an activated carbon compact to achieve the above object.
- the raw carbonaceous material powder was kneaded with a binder, and the resulting mixture was formed into a single strand.
- the strands are tumbled and granulated, and then infusibilized under appropriate conditions and carbonized, and then activated in a state where contact with an activating gas is appropriately suppressed, whereby spherical activated carbon having high hardness is obtained.
- the present invention can be used to produce general-purpose and useful raw materials such as coconut shell and coal, and have completed the present invention.
- the present invention is a spherical activated carbon made of a non-melting solid carbonaceous material as a raw material and having a certain hardness or more.
- a spherical activated carbon having a relatively small diameter and a small pressure loss when used is used, which is made of a general-purpose and useful carbon material such as coconut shell carbide and coal.
- a general-purpose and useful carbon material such as coconut shell carbide and coal.
- the activated carbon in the present invention is a spherical activated carbon whose main raw material is a non-melting solid carbonaceous material.
- non-melting as used herein means that the raw material does not melt and become liquid under conditions until the raw material is granulated and made infusible.
- the carbonaceous material as the raw material of the present invention has a melting point or decomposition point of 300 ° C. or more.
- the carbonaceous material means that its main component also has carbon power, and usually refers to a material whose carbon atom accounts for 60% or more of the total weight after drying and removing water.
- to be used as a main raw material means that 50% by weight or more, preferably 70% by weight or more of the carbon amount before infusibilization and carbonization is derived from the solid carbonaceous material.
- the non-melting solid carbonaceous material used as the raw material of the activated carbon of the present invention includes charcoal, bamboo charcoal, coconut shell charcoal, and various types of coal such as anthracite and bituminous coal. Since activated carbon having various properties can be produced, coconut shell carbide and coal are preferred. Among them, coconut shell charcoal is particularly preferred in that it does not contain harmful impurities and is easily available commercially and has an appropriate pore structure easily.
- the activated carbon of the present invention is a spherical activated carbon.
- Spherical here means columnar pellets or broken Unlike crushed granular activated carbon, it has a shape without sharp edges. Since the activated carbon has a shape without such sharp edges, the activated carbon of the present invention is preferable because damage due to vibration or collision with other particles and dust generation due to the loss can be suppressed. In addition, since such a shape is regularly filled, the pressure loss is constant irrespective of the portion, and it is difficult to cause a drift immediately, which is also preferable.
- the spheroid may be any shape having no sharp edge and no edge as described above, and among shapes having no edge, it is preferable to be closer to a true sphere.
- the ratio of the major axis to the minor axis is preferably from 1.0 to 2.0, and more preferably from 1.0 to 1.5.
- the hardness of the spherical activated carbon is preferably higher.
- the hardness of the activated carbon is represented by a hardness (hereinafter, sometimes abbreviated as JIS hardness) measured by a method specified in i IS K1474.
- JIS hardness a hardness measured by a method specified in i IS K1474.
- conventionally used JIS hardness exceeds 98% if it has been used in applications where dust generation must be suppressed, as described above. Even if JIS hardness is compared with activated carbon, which generates less dust and can prevent advanced dust, the difference does not appear clearly. Therefore, it is difficult to evaluate whether or not activated carbon is capable of advanced dust control using JIS hardness as an index.
- the present inventors have conducted various studies to find a hardness measurement method that can clearly reflect the degree of dust generation.
- the micro strength hereinafter referred to as MS hardness
- MS hardness is less than the degree of dust generation due to damage during use. They found a good agreement, and adopted the MS hardness as an index for evaluating the activated carbon of the present invention.
- the MS hardness measurement method in the present invention is a method used for measuring hardness of coal or the like, which is adjusted so that activated carbon having a particle size to be targeted by the present invention can be appropriately evaluated.
- the outline of the measurement method is as follows. That is, 10 8 mm steel balls are placed in a steel pot having an inner diameter of 25.4 mm and a length of 304.8 mm, and 5 g of dried granular activated carbon is further sealed therein. The steel pot is attached to the measuring instrument and rotated at a speed of 25 revolutions per minute for 40 minutes.
- the hardness of activated carbon in MS hardness when expressing the hardness of activated carbon in MS hardness, it must be expressed as a function of the particle size in order to reflect the original hardness of the material.
- the present inventors determined that the average particle size of the spherical activated carbon manufactured by almost the same method and having almost the same practical hardness was X (mm) and the MS hardness was When y is defined as y (%), it has been found that the relationship of the following formula (I) is substantially established between X and y.
- the above equation is an empirical equation.
- the purpose is as follows. First, consider the conditions that must be met for MS hardness. When the particle size of the object to be measured is uniform, and when the particle size X is too small, the MS hardness has to be zero because all the objects to be measured pass through the sieve without being crushed at all. Conversely, if X becomes too large, even if it is crushed, it will not easily pass through the sieve, so the MS hardness must approach 100%.
- a (b_x) indicates the percentage of fragments that have passed through the sieve as a result of crushing during measurement.
- b is the sieve aperture (mm)
- b 0.3 because the above measurement uses a sieve aperture of 0.3 mm.
- a is the absolute value of the activated carbon material. It can be said that it is an index indicating hardness. According to the method of measuring the MS hardness, if the measurement target is hard enough not to be crushed at all and the particle size of the measurement target is uniform and is equal to or larger than the mesh size of the sieve, the MS hardness becomes 100% regardless of the particle size. If a is increased in the above formula (I), y approaches 100%, so that in this respect also, formula (I) satisfies the condition that MS hardness should be.
- the spherical activated carbon of the present invention has an average particle diameter of X (mm) and an MS hardness of ⁇ y (%), where x is in the range of 0.5 to 20.0, and X and y Is a spherical activated carbon having a force of 100 X ( 1-0.8 X 1.45 ( 0 ⁇ 3 _ ⁇ ) ) or more, in other words, a spherical activated carbon having a of 1.45 or more in the above formula (I). .
- a is more preferably 1.60 or more in the formula (I), in which the higher the hardness in practice, the better.
- a in the formula (I) is preferably 2.50 or less, more preferably 2.10 or less.
- the present inventors have studied diligently to increase the hardness of spherical activated carbon, and have succeeded in producing a spherical activated carbon having a high hardness that cannot be conventionally produced from a non-melting solid carbonaceous material.
- spherical activated carbon satisfying the above relationship between MS hardness and average particle size was found to be more effective than the conventional spherical activated carbon in the applications described above. It was confirmed that troubles caused by crushing and abrasion during use were significantly reduced, and this led to the present invention.
- the average particle size of the spherical activated carbon of the present invention is a value measured according to the method of JIS K-1474. That is, the average particle size is obtained by classifying activated carbon using a sieve specified in JIS and multiplying the weight fraction of the classified activated carbon by the median opening of the sieve used for classification. It is calculated by calculating
- the particle size of the spherical activated carbon of the present invention is appropriately selected according to the usage mode.
- the average particle size is preferably not more than 5.Omm, more preferably not more than 3.Omm.
- the average particle size is preferably at least 0.5 mm, more preferably at least 0.8 mm.
- Adsorption performance for automotive fuel evaporation prevention applications is represented by the amount of benzene adsorbed.
- the benzene adsorption amount is measured in accordance with the measurement of the adsorption performance of IS K1474 solvent vapor, and is the amount of benzene adsorbed per unit weight of activated carbon (equivalent to the unit weight of activated carbon in equilibrium adsorption at a saturated concentration of 1Z10). % By weight). If the amount of benzene adsorbed is too small, the adsorbing capacity is practically insufficient in many cases.
- the benzene adsorption amount is preferably 25% to 65%.
- the molecule to be adsorbed is smaller than benzene, so the benzene adsorption amount may be 25% or less.
- the spherical activated carbon of the present invention may be subjected to a chemical or physical treatment on the surface as necessary.
- surface modification include the attachment of salts or oxides of metals such as silver and iron, and mineral acids.
- other powders may be contained on the surface, Z or inside as long as the original function of the activated carbon is not impaired.
- metal oxides such as silica, alumina and zeolite.
- the spherical activated carbon in the present invention is obtained by mixing a raw material non-melting solid carbonaceous material (hereinafter sometimes abbreviated as a raw carbon material), a carbonizable binder and water as needed, and extruding the mixture into a strand. After the obtained strand was cut into an appropriate size, it was formed into a spherical shape by tumbling granulation, and the contact between the formed mixture and the gas phase was appropriately suppressed under conditions that appropriately suppressed the contact. It can be produced by infusibilizing and carbonizing under appropriate conditions.
- the raw carbon material used here is not particularly limited as long as it is a non-melting solid carbonaceous material as described above. However, it is easily available and activated carbon having various pores can be produced. Coal and coconut shell carbide are preferably used. In particular, coconut shell charcoal is preferably used because it can produce activated carbon having a wide performance range without containing harmful impurities.
- the particle size of the raw carbon material may be selected according to the purpose of use. However, if the particle size is too large, it becomes difficult to solidify with a nodder, and the resulting spherical activated carbon has large pores and thus has a high hardness. It becomes difficult. On the other hand, if the particle size is too small, the working efficiency during molding is reduced. Therefore, the particle diameter of the raw carbon material is more preferably 5 ⁇ m to 20 ⁇ m, preferably 1 ⁇ m to 100 ⁇ m in center particle diameter.
- Examples of the carbonizable binder include high-boiling organic substances such as coal tar, pitch, and thermosetting phenol resin.
- the kind and amount of the binder are adjusted so that the raw material mixture is appropriately softened at a temperature at which it can be easily operated. From this viewpoint, it is preferable that the binder be soft at about 40 ° C. to 100 ° C.
- the amount of the carbonizable binder used is preferably 20 to 60 parts by weight, more preferably 35 to 45 parts by weight, per 100 parts by weight of the carbon material.
- water is added as necessary.
- the amount of water to be added depends on the type and particle size of the raw coal material and the type of binder.However, in order to enable easy extrusion when extruding into strands and to obtain good formability during subsequent rolling granulation. It is preferable that about 5 to 30 parts by weight of kashi is added to 100 parts by weight of charcoal material.
- additives may be added as long as the function of the activated carbon of the present invention is not impaired.
- additives include alkali metal compounds such as lithium, sodium, and lithium, and alkali metals such as magnesium and calcium, which are added to improve functions such as improving adsorption performance and imparting a catalytic function.
- alkali metal compounds such as lithium, sodium, and lithium
- alkali metals such as magnesium and calcium
- Other typical metals such as earth metal compounds, silicon and aluminum and their compounds, transition metals and compounds such as titanium, iron, copper, silver and zinc, and composites of silica alumina, zeolite, activated clay, clay, etc.
- An example of an acid banule can be given.
- the amount of the additives other than the carbon material and the carbonizable binder may be an amount that does not impair the function of the activated carbon, but usually 30 parts by weight or less is preferable for 100 parts by weight of the raw carbon material. Parts or less are more preferred.
- the above-mentioned raw material carbon material, carbonizable binder, and if necessary, water and other additives are mixed to form a carbon material mixture.
- Conditions and a mixing device for mixing the carbon material and the carbonizable binder are appropriately determined according to the type and composition of the carbon material and the carbonizable binder.
- Conventionally known various mixers can be used as the mixing device, and examples thereof include a two-shaft-one mixer and a one-shaft-one mixer.
- the temperature at the time of mixing is not particularly limited as long as the binder maintains an appropriate fluidity, but is usually preferably 20 to: LOO ° C, more preferably 40 to 80 ° C.
- the carbon material mixture obtained by stirring and mixing is extruded into a strand shape and cut into a pellet of an appropriate size.
- This step can be performed by, for example, a pellet mill or the like.
- the nozzle hole diameter and the size to be cut are determined according to the size of the target spherical activated carbon. It is important that the mixture is not directly formed into a spherical shape and is made into a strand in order to obtain a spherical activated carbon having a high hardness and a high filling specific gravity. Although the reason is not always clear, once mixed and extruded, relatively large bubbles or composition in the carbon material mixture that causes structural defects when the carbon material mixture is converted into activated carbon is considered. It is estimated that fluctuations are eliminated. Also, once cutting as a strand is important for obtaining a product having a smaller particle size distribution than a method of directly rolling granulating a powder raw material and a binder.
- the cut strand is formed into a spherical shape by a method such as rolling granulation.
- a method such as rolling granulation.
- an ordinary rolling granulator can be used. Examples of such an apparatus include, for example, Malmerizer-1 (trade name, manufactured by Dalton) and High Speed Mixer (trade name, manufactured by Fukae Bautech Co.).
- the temperature of the tumbling granulation is not particularly limited, but the force is preferably carried out at 40 to 100 ° C., for example, the temperature is easily adjusted by a granulator.
- the spherical carbon material mixture obtained by shaping the strand into a sphere by the above method becomes spherical activated carbon through steps such as infusibilization, carbonization and activation.
- steps such as infusibilization, carbonization and activation.
- Conditions suitable for obtaining the spherical activated carbon of the present invention are generally limited because they vary depending on the particle size of the spherical carbon material mixture, the type of the raw carbon material, the type and amount of the carbonizable binder, and the like.
- Difficult 1S In any process, adjust the conditions to suppress contact between the carbon material mixture and the gas. When adjusted, activated carbon having high hardness tends to be easily obtained.
- the spherical carbon material mixture obtained by forming the strand into a spherical shape is made infusible under an atmosphere containing oxygen.
- the atmosphere containing oxygen is ordinary air, a mixed gas of oxygen and nitrogen, or a gas containing oxygen in water vapor or carbon dioxide.
- the oxygen concentration, the temperature, the contact state with the gas, and the time according to the particle diameter it is preferable to appropriately adjust the oxygen concentration, the temperature, the contact state with the gas, and the time according to the particle diameter.
- the infusibilization conditions are adjusted so as to obtain an appropriate oxidation rate according to the particle size of the spherical coal, but it is usually preferably carried out at a temperature of 400 ° C. or less and an oxygen concentration of 5 to 22%.
- the infusible spherical coal is carbonized in an inert gas. Suitable conditions for carbonization are selected according to the particle size, but it is preferable to raise the temperature to about 500 to 700 ° C.
- the inert gas is a gas which is inert to the carbonaceous material within this temperature range, usually means nitrogen, and may contain other non-acidic gases.
- the binder is also carbonized by the infusibilizing and carbonizing treatment, the finally obtained spherical activated carbon is substantially free of the binder.
- the above-mentioned well-known devices can be used.
- the spherical activated carbon of the present invention having high hardness and excellent dust prevention can be obtained.
- a moving bed type device such as a rotary kiln, a heleshoff type multi-stage furnace, a sleep furnace, or the like is preferably used.
- a force at which an appropriate condition needs to be selected according to the particle size a temperature of about 800 ° C to 1000 ° C is preferably adopted.
- the activation gas atmosphere is steam, carbon dioxide, or a mixed gas thereof.
- the activated gas atmosphere is a petroleum mixture containing high water vapor and carbon dioxide.
- a combination gas or the like is preferably used.
- performing activation for a long time by extremely suppressing contact with gas is not a problem from the viewpoint of obtaining activated carbon with high hardness, but since the production efficiency is low, the activation time is practically 60 hours or less. Is preferred.
- the spherical activated carbon of the present invention generates a small amount of dust when subjected to vibration or when it comes into contact with a high-speed gas, and is therefore suitably used for applications such as fuel vapor prevention in automobiles.
- absorption of harmful substances in clean rooms such as pharmaceutical manufacturing, absorption of harmful substances inside and around precision equipment and electronic equipment that dislike dust, absorption of substances that affect hard disks such as computers, etc. It is suitably used for processing gas with a flow rate, for example, a pressure swing type gas separation device.
- the coconut shell carbide (85% carbon content) was finely pulverized by a fine pulverizer so as to have a particle size of 200 mesh (corresponding to a particle size of 75 ⁇ m) or less.
- the center particle size of the obtained coconut shell carbide fine powder was 10 m.
- 40 parts by weight of coal tar (60% of carbon content) and 10 parts by weight of water are added to 100 parts by weight of the coconut shell carbide fine powder, and the mixture is kneaded for 20 minutes at a rotation speed of 68 rpm with a Dalton universal mixing stirrer 30DM (trade name). went.
- the obtained mixture is extruded into a strand shape by a pellet mill (Ueda Tekkosha Co., Ltd.
- the obtained spherical molded product was heated to 200 ° C. in a rotation speed of 4 rpm in an air atmosphere for 30 minutes, made infusible for 45 minutes, and then infused in the same furnace. The temperature was raised to 600 ° C in an active gas atmosphere for 60 minutes to carry out carbonization. Further, in a rotary kiln (diameter: 400 mm), nitrogen gas and steam (steam partial pressure: 49%) were activated at 900 ° C for 20 hours to obtain spherical activated carbon having an average particle size of 1.8 mm. [0052] The MS hardness of the obtained spherical activated carbon was 63.3%.
- the spherical activated carbon had a benzene adsorption of 41.5% and a packing specific gravity of 0.52 g / mU.
- the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- Kneading was performed under the same conditions as in Example 1 above, and the resulting mixture was extruded into a strand shape using a pellet mill and cut into pellets having a diameter of 3.5 mm and a length of 3 to 9 mm. A molded product was obtained. This extruded product was treated under the same conditions as in Example 1 to obtain a spherical activated carbon having an average particle size of 4.5 mm.
- the MS hardness of the obtained spherical activated carbon was 91.9%.
- the spherical activated carbon had a benzene adsorption amount of 43.0%, a packing specific gravity of 0.54 gZml, and a ratio of major axis to minor axis in the range of 1 to 1.5.
- the spherical activated carbon was measured for butane working capacity (hereinafter referred to as BWC) by ASTM D5228, which is an evaluation method of activated carbon for preventing fuel vaporization from automobile fuel, and found to be 14.6gZl00ml.
- the spherical molded product was heated to 200 ° C in a rotation speed of 4 rpm in an air atmosphere for 30 minutes, then made infusible for 45 minutes, and then inactivated in the same furnace. The temperature was raised to 600 ° C in a gas atmosphere for 60 minutes to perform carbonization. In addition, it was 900 with a rotary quinolene (400 mm diameter) using nitrogen gas and steam (49% steam partial pressure). C was activated for 20 hours to obtain spherical activated carbon having an average particle size of 2.6 mm.
- the MS hardness of the obtained spherical activated carbon was 69.4%, and the benzene adsorption amount was 42.1%.
- the packing specific gravity of this spherical activated carbon was 0.51 gZml, and the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- a spherical molded article having an average particle diameter of 3.3 mm obtained under the same conditions as in Example 5 was infusibilized and carbonized under the same conditions as in Example 5, and then subjected to 23 hours under the same conditions as in Example 5.
- Activation was performed to obtain a spherical activated carbon having an average particle size of 2.5 mm.
- the MS hardness of the obtained spherical activated carbon was 68.2%, and the benzene adsorption amount was 54.6%.
- the packing specific gravity of the spherical activated carbon was 0.44 gZml, and the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- a spherical molded product having an average particle size of 3.3 mm obtained under the same conditions as in Example 5 was obtained under the same conditions as in Example 5. After infusibilization and carbonization under the same conditions, activation was performed for 25 hours under the same conditions as in Example 5 to obtain a spherical activated carbon having an average particle size of 2.5 mm.
- the MS hardness of the obtained spherical activated carbon was 65.7%, and the benzene adsorption amount was 65.2%.
- the packing density of the spherical activated carbon was 0.40 gZml, and the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- Patent Document 4 Japanese Patent Publication No. Sho 46-41210
- a spherical activated carbon was produced according to the description in Examples.
- a raw coal a weakly caking coal having an ash content of 3% was used, dried to a moisture content of 2%, and pulverized to 100 mesh or less.
- a norp waste liquid separately prepared as a binder was added to the raw coal, and at the same time, water was secondarily added to adjust the water content to 20%.
- a force adjusted to a water content of 12 to 15% was a force that could not be formed into a spherical shape even when kneaded.
- This is kneaded well and molded using a high-speed mixer FS-G type (volume: 10 liters, diameter: 400 mm) manufactured by Fukae Bautech Co., Ltd. for 10 minutes at 35 ° C and a rotation speed of 100 rpm to form a spherical shape having an average particle size of 2.3 mm.
- a molded product was obtained.
- the obtained spherical molded product was dried at 100 ° C, modified at 360 ° C, and sintered at 530 ° C to obtain a carbon material suitable for carbonization.
- the obtained carbonaceous material was carbonized in a rotary kiln at 900 ° C, and steam activated in a fluidized activation furnace at 900 ° C and a steam partial pressure of 40% for 2 hours.
- the average particle size of the obtained activated carbon was 1.8 mm.
- the MS hardness of the obtained spherical activated carbon was 46.0%, and the benzene adsorption amount was 32.2%.
- the packing specific gravity of this spherical activated carbon was 0.47 gZml, and the ratio of major axis to minor axis was in the range of 1 to 1.5.
- Patent Document 4 describes activated carbon having a product particle size of 3 to: LOmm target, MS hardness of 90%, and benzene adsorption amount of 30%. Although there is no description of the particle size in the above-mentioned publication, the particle size is 3 or more: If the average particle size is 7.
- Example 2 The same method as in Example 1 except that the infusibilization was performed at 250 ° C for 2 hours and the activation was performed using a fluidized activation furnace at 850 ° C and a steam partial pressure of 40% for 2 hours.
- Produced spherical activated carbon The average particle diameter of the spherical activated carbon 2. Omm, MS hardness 52.4% was benzene adsorption amount ⁇ or 38.2 0/0.
- the packing specific gravity of this spherical activated carbon was 0.49 gZml, and the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- the physical properties of a commercially available spherical activated carbon X-7000 (trade name) manufactured by Nippon Environmental Chemicals Co., Ltd., having an average particle size of 1.6 mm were measured.
- the MS hardness is 28.6%
- x l.6
- the MS hardness of this spherical activated carbon is this value. It is below.
- the Bz adsorption amount was 31.6%.
- the MS hardness of the obtained spherical activated carbon was 37.3%, and the benzene adsorption amount was 27.5%.
- the packing specific gravity of this spherical activated carbon was 0.53 gZml, and the ratio of the major axis to the minor axis was in the range of 1 to 1.5.
- Activated carbons of Examples 1 to 7 and Comparative Examples 1 to 3 were measured for a powdered ratio.
- the powdered drier rate is as follows: 1.Og of previously dried spherical activated carbon was placed in a 100-ml stoppered Erlenmeyer flask, and shaken at 200 rpm for 3 hours. Immediately after the suspension, the suspension was immediately taken, the absorbance at 650 nm was measured with an absorbance meter, and this was converted to the suspension concentration by a calibration curve prepared in advance, and the result was indicated as a powder ratio.
- the above-mentioned pulverization rate is an index of the dust generation when activated carbon is used in an automobile fuel evaporation prevention device (caster).
- the activated carbon of the present invention is suitably used for an automobile fuel evaporation prevention device (canister), pressure swing type gas separation, and removal of harmful substances in an environment that dislikes dust.
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- Carbon And Carbon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims
Priority Applications (3)
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CN2005800161360A CN1956919B (zh) | 2004-05-20 | 2005-05-16 | 球状活性炭及其制备方法 |
JP2006513689A JP4855251B2 (ja) | 2004-05-20 | 2005-05-16 | 球状活性炭およびその製造方法 |
US11/597,265 US20080063592A1 (en) | 2004-05-20 | 2005-05-16 | Spherical Active Carbon And Process For Producing The Same |
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JP2004-149920 | 2004-05-20 | ||
JP2004149920 | 2004-05-20 |
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WO2005113435A1 true WO2005113435A1 (ja) | 2005-12-01 |
Family
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PCT/JP2005/008886 WO2005113435A1 (ja) | 2004-05-20 | 2005-05-16 | 球状活性炭およびその製造方法 |
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Country | Link |
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US (1) | US20080063592A1 (ja) |
JP (1) | JP4855251B2 (ja) |
CN (1) | CN1956919B (ja) |
WO (1) | WO2005113435A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008044587A1 (fr) * | 2006-10-12 | 2008-04-17 | Cataler Corporation | Charbon actif et réservoir à charbon actif et filtre à air d'admission utilisant celui-ci |
JP2016147218A (ja) * | 2015-02-10 | 2016-08-18 | クラレケミカル株式会社 | 高性能アルデヒド除去用吸着材及びその製造方法 |
JP7546509B2 (ja) | 2021-03-30 | 2024-09-06 | 大阪ガスケミカル株式会社 | 造粒炭及びその製造方法、空気清浄機用フィルター、並びに空気清浄機 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
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CN100477345C (zh) * | 2004-03-30 | 2009-04-08 | 株式会社吴羽 | 非水电解质二次电池用负极材料、其制造方法、负极和电池 |
CN102471096B (zh) * | 2009-08-06 | 2014-09-24 | 可乐丽化学株式会社 | 活性炭成型体以及使用该活性炭成型体的净水器 |
CN101797396A (zh) * | 2010-04-30 | 2010-08-11 | 上海绿伞环保科技发展有限公司 | 一种功能性活性碳吸味剂 |
KR101874086B1 (ko) * | 2012-12-28 | 2018-08-02 | 재단법인 포항산업과학연구원 | 활성탄 제조 방법 |
US10103540B2 (en) * | 2014-04-24 | 2018-10-16 | General Electric Company | Method and system for transient voltage suppression devices with active control |
CN104528713B (zh) * | 2014-11-22 | 2020-09-01 | 河南恒瑞源实业有限公司 | 一种利用杜仲制备活性炭的方法 |
JP6803398B2 (ja) * | 2016-12-21 | 2020-12-23 | 株式会社クレハ | 球状活性炭およびその製造方法 |
EP3580169A2 (en) | 2017-02-08 | 2019-12-18 | National Electrical Carbon Products, Inc. | Carbon powders and methods of making same |
CN107344718B (zh) * | 2017-06-29 | 2023-07-25 | 安泰环境工程技术有限公司 | 一种连续式高温炭化活化一体装置及方法 |
KR102653112B1 (ko) | 2017-09-29 | 2024-04-01 | 인제비티 사우스 캐롤라이나, 엘엘씨 | 저배출, 고작용 용량의 흡착제 및 캐니스터 시스템 |
US11154838B2 (en) | 2017-09-29 | 2021-10-26 | Ingevity South Carolina, Llc | Low emissions, high working capacity adsorbent and canister system |
CN112238073A (zh) * | 2020-10-20 | 2021-01-19 | 南京众荣环保技术开发有限公司 | 一种活性炭原料活化处理加工系统 |
US20240024846A1 (en) * | 2022-07-25 | 2024-01-25 | Calgon Carbon Corporation | Surface-modified activated carbon for reduced backwashing frequency during particulate filtration |
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JPH01126214A (ja) * | 1987-11-10 | 1989-05-18 | Idemitsu Kosan Co Ltd | 球状活性炭の製造方法 |
JP2004010434A (ja) * | 2002-06-07 | 2004-01-15 | Kuraray Chem Corp | 造粒炭及びその製造方法 |
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DE6947770U (de) * | 1969-12-10 | 1970-05-27 | Agfa Gevaert Ag | Zubehoer zu einer reprokamera. |
US3888958A (en) * | 1970-03-21 | 1975-06-10 | Bergwerksverband Gmbh | Process for making shaped pieces from low temperature coke of low bulk weight |
DE2322706C3 (de) * | 1973-05-05 | 1982-01-14 | Bayer Ag, 5090 Leverkusen | Verfahren zur Herstellung von bruch- und abriebfesten Aktivkohlen |
US4371454A (en) * | 1979-11-02 | 1983-02-01 | Kureha Kagaku Kogyo Kabushiki Kaisha | Process for preparing spherical carbon material and spherical activated carbon |
US5270280A (en) * | 1990-11-01 | 1993-12-14 | Nippon Carbon Co., Ltd. | Packing material for liquid chromatography and method of manufacturing thereof |
JP3728475B2 (ja) * | 1996-04-12 | 2005-12-21 | クラレケミカル株式会社 | 除塵フィルターの機能を有する吸着材 |
CN1057278C (zh) * | 1997-01-17 | 2000-10-11 | 中国科学院山西煤炭化学研究所 | 一种球状活性炭的制备方法 |
MY121452A (en) * | 1998-04-07 | 2006-01-28 | Chiyoda Corp | Desulfurization of exhaust gases using activated carbon catalyst. |
KR100744984B1 (ko) * | 1999-11-16 | 2007-08-02 | 혼다 기켄 고교 가부시키가이샤 | 전기 이중층 캐패시터용 전극 및 그것의 제조 방법 |
US6789547B1 (en) * | 2000-10-31 | 2004-09-14 | Philip Morris Incorporated | Carbon technology |
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2005
- 2005-05-16 CN CN2005800161360A patent/CN1956919B/zh not_active Expired - Fee Related
- 2005-05-16 US US11/597,265 patent/US20080063592A1/en not_active Abandoned
- 2005-05-16 JP JP2006513689A patent/JP4855251B2/ja not_active Expired - Fee Related
- 2005-05-16 WO PCT/JP2005/008886 patent/WO2005113435A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5051996A (ja) * | 1973-09-11 | 1975-05-09 | ||
JPH01126214A (ja) * | 1987-11-10 | 1989-05-18 | Idemitsu Kosan Co Ltd | 球状活性炭の製造方法 |
JP2004010434A (ja) * | 2002-06-07 | 2004-01-15 | Kuraray Chem Corp | 造粒炭及びその製造方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008044587A1 (fr) * | 2006-10-12 | 2008-04-17 | Cataler Corporation | Charbon actif et réservoir à charbon actif et filtre à air d'admission utilisant celui-ci |
US8137443B2 (en) | 2006-10-12 | 2012-03-20 | Cataler Corporation | Activated carbon and canister and intake air filter utilizing the same |
JP5087550B2 (ja) * | 2006-10-12 | 2012-12-05 | 株式会社キャタラー | 活性炭、これを用いたキャニスター及び吸気系フィルター、並びに前記活性炭の製造方法 |
JP2016147218A (ja) * | 2015-02-10 | 2016-08-18 | クラレケミカル株式会社 | 高性能アルデヒド除去用吸着材及びその製造方法 |
JP7546509B2 (ja) | 2021-03-30 | 2024-09-06 | 大阪ガスケミカル株式会社 | 造粒炭及びその製造方法、空気清浄機用フィルター、並びに空気清浄機 |
Also Published As
Publication number | Publication date |
---|---|
CN1956919B (zh) | 2011-08-03 |
US20080063592A1 (en) | 2008-03-13 |
JP4855251B2 (ja) | 2012-01-18 |
JPWO2005113435A1 (ja) | 2008-03-27 |
CN1956919A (zh) | 2007-05-02 |
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