JPS6169900A - Production of high density detergent improved in flowability - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a powder detergent having high density and excellent fluidity.

[Conventional technology and problems]

Traditionally, detergents used in the home have been required to have good productivity, be easy to handle, and have good solubility when used by consumers, and for this reason, most detergents have been powdered detergents manufactured by the spray drying method. there were. Here, ease of handling refers to the fact that the powder has high free-flowing properties and is difficult to solidify.1. This means that there is no generation of dust.

However, in recent years, demand for high-density powder detergents has been increasing due to their rationality in terms of resource conservation and convenience such as ease of portability for consumers. High density refers to powder having an apparent specific gravity of 0.56/cm3 or more. It is extremely difficult to obtain powder detergents with such high density by conventional spray drying methods.

Generally, the apparent specific gravity of spray-dried detergent particles is 0.4.
g/cm3 or less, average particle size 200-1000 μm
However, it is difficult to directly obtain high-density detergent particles.

On the other hand, the spray drying method has the advantage that any composition containing various raw materials including an anionic surfactant containing a large amount of water can be easily dried, except for thermally unstable components. Therefore, the spray-dried detergent particles are processed to
It has been desired to establish a manufacturing method for producing particles with high density and excellent fluidity.

For example, there is an attempt to obtain a high-density powder detergent by processing spray-dried detergent particles, as disclosed in Japanese Patent Application Laid-Open No. 51-67302.

In JP-A No. 51-67302, spray-drying was carried out using a granulation device called Marmerizer, which includes a substantially horizontal, rotatable rough surface table located inside and at the bottom of a substantially vertical smooth wall surface. Although a manufacturing method for densifying powder detergent has been disclosed and is a pioneering technology of the present invention, no consideration is given to the fluidity of the powder, and as a result, the fluidity of the product is similar to that of the original powder. It is worse than detergents and provides insufficient convenience for consumers.

[Means for solving problems]

Based on the above technical background, we conducted research to produce a high-density powder detergent that exhibits good fluidity, and as a result, we completed the present invention described below.

The present invention provides at least one surfactant and at least one surfactant.
The fine powder obtained by crushing the spray-dried product of the detergent containing the seed builder, or the fine powder generated from the spray drying equipment and collected from the dust collection equipment, is placed inside a horizontal mixing tank using a horizontal stirring shaft. Agitation granulation processing is carried out in the presence of a surface modifier and binder using a mixer with a stirring blade attached to the shaft to mix the powder, or a mixer with a chopper for crushing or dispersing in this tank. By doing so, a powder detergent with high density and excellent fluidity can be produced. Here, fine powder has an average particle size of 12
Means particles of 5 μm or less.

As a surface modifier, aluminosilicate is desirable because it acts as a calcium ion scavenger during washing. In particular, aluminosilicate with an average particle size of 10 μm or less is desirable. As a surface modifier, aluminosilicate In addition to salt, J-free powders such as silicon dioxide, bentonite talc, and clay with an average particle size of 10 μm or less can be used. Also, metal soaps with an average particle size of 10 μm or less can be used as well. I can do it.

The purpose is achieved by using the surface modifier in an amount of 0.5 to 35 parts by weight per 100 parts by weight of the spray-dried detergent particles. If the surface modifier is less than 0.5 parts by weight, it is difficult to obtain a powder with good fluidity, and if it exceeds 35 parts by weight, fluidity decreases and the amount of binder is unnecessarily reduced. If the amount is not increased, dust will be generated and there is a risk that the window for use by consumers will be damaged.

Furthermore, the apparent specific gravity of the high-density detergent particles is 0.5 g/cl.
It is desirable that it is l+3 or more, preferably 0.5 to 1.2 g/cm3. This is because if the apparent specific gravity is greater than this, it tends to have an adverse effect on the solubility of the powder. Moreover, it is desirable that the average particle diameter is from 200 to 800 μm. This is because when the average particle diameter is less than 200 μm, dust is generated, and when it exceeds 800 μm, solubility tends to deteriorate.

Surfactants that can be used in the present invention include the following.

1) Straight chain or branched alkylbenzene sulfonate having an alkyl group with an average carbon number of 10 to 1G 2) A straight or branched chain alkyl group or alkenyl group having an average carbon number of 10 to 20, within one molecule on average 0.5-8
Mol of ethylene oxide or propylene oxide or butylene oxide or ethylene oxide/propylene oxide = O-1/9.9 to 9.9
7~. Alkyl or alkenyl ether sulfates added in a ratio of 1 or in a ratio of ethylene oxide/butylene oxide = O, l/9.9 to 9-910.1 3) Alkyl or alkenyl groups with an average carbon number of lO to 20. 4) Olefin sulfonates having an average of 10 to 20 carbon atoms in one molecule 5) Alkanesulfonates having an average of 10 to 20 carbon atoms in one molecule 6) Average lO to 24 Saturated or unsaturated fatty acid salt having carbon atoms in one molecule 7) Having an alkyl group or alkenyl group with an average number of carbon atoms of 10 to 20, and an average of 0.5 to 8 moles of ethylene oxide or propylene oxide in one molecule Alternatively, the ratio of butylene oxide or ethylene oxide/propylene oxide = 0.1/'19 to 9-910.1 or ethylene oxide/butylene oxide = 0.
Alkyl or alkenyl ether carboxylic acid salt added at a ratio of 1/9.9 to 9.910.1 8) α-Sulfo fatty acid salt or ester represented by the following formula R-CIlCO, Y 03Z (wherein Y is carbon Number 1 to 3 alkyl group or counter ion, Z
is the counterion. R represents an alkyl group or alkenyl group having 10 to 20 carbon atoms. ) 9) Amino acid type surfactant represented by the following general formula (where R,l is an alkyl group or alkenyl group having 8 to 24 carbon atoms, R2 is hydrogen or an alkyl group having 1 to 2 carbon atoms, R is , I represents an amino acid residue, and X represents an alkali metal or alkaline earth metal ion.) Kan2 R1'-CO-N (CHz), -COOX
h.

(R+', Rz" and X are as described above. n is an integer of 1 to 5.) (R3' is ° as described above. m is an integer of 1 to 8.

) Kan 4 R,'-N -CIl-COOXR4
1h'(R1',R3' and X are as described above. R4 represents hydrogen or an alkyl or hydroxyalkyl group having 1 to 2 carbon atoms.)! 1kL5 Rs-N -CI-COOXR
z' I? I"(R1',R3' and X are as described above. R5 has 6 carbon atoms.
~28 β-hydroxyalkyl or β-hydroxyalkenyl groups. ) (R3''+ R5 and
Polyoxyethylene alkyl or alkenyl ether to which 1 to 20 moles of ethylene oxide have been added 11) Having an alkyl group with an average carbon number of 6 to 12, 1 to 2
Polyoxyethylene alkylphenyl ether to which 0 mol of ethylene oxide has been added 12) Polyoxypropylene alkyl or alkenyl ether having an average carbon number of 10 to 20 alkyl or alkenyl groups and to which 1 to 20 mol of propylene oxide has been added 13 ) Polyoxybutylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 moles of butylene oxide is added 14) Having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and a nonionic surfactant with a total of 1 to 30 moles of ethylene oxide and propylene oxide or ethylene oxide and butylene oxide added (the ratio of ethylene oxide to propylene oxide or butylene oxide is 0.1/9.9 to 9 .910.1)1
5) Higher fatty acid alkanolamide or its alkylene oxide adduct represented by the following general formula RI2''1?tg' (wherein R1, ゛ is an alkyl group or alkenyl group having 10 to 20 carbon atoms, and RI2'' is H or CI+3,
I3 is an integer from 1 to 3, and rr52 is an integer from O to 3.

) 16) Sucrose fatty acid ester consisting of a fatty acid with an average carbon number of 10 to 20 and a monosaccharide 17) Fatty acid glycerin monoester consisting of a fatty acid with an average carbon number of 10 to 20 and glycerin 1B) Alkyl represented by the following general formula Amine oxide R14゜R,3'-N→0 RIS" (In the formula, RI3 is an alkyl group or alkenyl group having 10 to 20 carbon atoms, and R14'+ I?IS' is an alkyl group or alkenyl group having 1 carbon number.
~3 alkyl group. ) 19) Betaine type amphoteric surfactant RZI represented by the following general formula (where RZI is an alkyl or alkenyl group having 8 to 24 carbon atoms, or a β-hydroxyalkyl or β-hydroxyalkenyl group, and R2□ is a carbon number of 1 to 24 carbon atoms) 4 alkyl group, R
Z3 represents an alkyl or hydroxyalkyl group having 1 to 6 carbon atoms. ) (CJ40) n2H (Here, R21 and R23 are as described above. I2 is 1 to 2
Indicates an integer of 0. ) 3R24 IG O Rz+ N Rzt Co.

7z4 (Here, I?z+ and RZ3 are as described above. Fh4 represents a carboxyalkyl or hydroxyalkyl group having 2 to 5 carbon atoms.) 20) Sulfonic acid type amphoteric surfactant I2 represented by the following general formula (here R1+ is an alkyl or alkenyl group having 3 to 24 carbon atoms, R12 is an alkyl group having 1 to 4 carbon atoms, RI3
is an alkyl group having 1 to 5 carbon atoms, 1? ta has 1 to 4 carbon atoms
represents an alkyl or hydroxyalkyl group. ) RI& (Here, R1+ and R14 are as described above. RI5+R1
& represents an alkyl or alkenyl group having 8 to 24 carbon atoms or 1 to 5 carbon atoms. ) (CzH40)nlH (Here, R11 and R+4 are as described above, and n is 1 to 2
Indicates an integer of 0. ) 21) Phosphate ester activator Nal Alkyl (or alkenyl) acidic phosphate ester (R'0)ll・-p-(OH),・(R' is an alkyl group having 8 to 24 carbon atoms, or an alkenyl group ,n"10m'
=3. n'=1-2) Kan2 alkyl (or alkenyl) phosphate ester (R'0),...-P-(O1+),... (R' is as described above, n'+ m''=3 .n"= 1-3) Fish 3 Alkyl (or alkenyl) phosphate ester salt (R'O), -P-(O1'l'), -(R', n"
, m'' is as mentioned above, the gates are Na and K.

Ca) 22) A cationic surfactant represented by the following general formula (wherein, at least one of R+"+ RZ't R1't R4° is an alkyl or alkenyl group having 8 to 24 carbon atoms, and the others are carbon atoms Represents an alkyl group of 1 to 5. X'' represents a halogen. As mentioned above.R, 1 is an alkylene group having 2 to 3 carbon atoms, and n4 is 1 to 3.
Indicates an integer of 20. ) The content of surfactant is 10 to 70% by weight, preferably 2
Weight at 5-50% weight.

Furthermore, the following inorganic builders IN can be used in the present invention.

Alkaline salts such as soda carbonate, sodium sesquicarbonate, and sodium silicate, neutral salts such as mirabilite, phosphates such as orthophosphate, pyrophosphate, tripolyphosphate, metaphosphate, hexametaphosphate, and phytate. Aluminosilicates below the perimeter can also be included.

Crystalline aluminosilicate X' (M
2'O or M"O) ・Al2O3・'l" (Si(
h) ・w' (N20) (wherein i" is an alkali metal atom, M" is an alkaline earth metal atom exchangeable with calcium, and X".

+, , + represent the number of moles of each component, 7 Generally, 0
．． 7≦≦1.5.0.8≦y'≦6, -゛ is any integer. ) Part 2 As the detergent builder, those represented by the following general formula are particularly preferred.

Na2O.AIto, .n5iO2.wllzO (here, n represents a number from 1.8 to 3.0, and the tsuba represents a number from 1 to 6.

) Amorphous aluminosilicate x (Mz
O)・AhO3・y(SiO□)・−(H2O) (wherein M represents a sodium and/or potassium atom,
, 3F, w represent the number of moles of each component within the following marginal value range.

0.7≦X≦1.2 1.6≦y≦2.8 W is any positive number including 0) N114 Amorphous aluminosilicate X represented by the following formula
(MzO)・Ah03・Y(Si(h)・Z(PzOs
)・ω(N20) (In the formula, H is Na or K, X, Y,
Z and - represent the number of moles of each component within the following numerical range.

0.20≦X≦1.10 0.20≦Y≦4.00 0.001≦Z≦0.80 Any positive number including 120) Furthermore, the following additives are used in the present invention. be able to.

Tl) Divalent metal ion scavenger 1) Ethane-1,1-diphosphonic acid, ethane-1,2
-) diphosphonic acid, ethane-1-hydroxy-1,1-
Diphosphonic acid and its derivatives, ethanehydroxy-1,
Phosphonates such as 1,2-1-diphosphonic acid, ethane-1,2-dicarboxy-1°2-diphosphonic acid, and methanehydroxyphosphonic acid.

2) 2-phosphonobutane-1,2-dicarboxylic acid, l-
Phosphonocarboxylic acid salts such as phosphonobutane-2,3,4-tricarboxylic acid and α-methylphosphonosuccinic acid.

3) Amino acid salts such as aspartic acid and glutamic acid.

4) Nitrilotriacetate, ethylenediaminetetraacetate,
Aminopolyacetates such as diethylenetriaminepentaacetate.

5) Polyacrylic acid, boriaconi-nodic acid, polyitaconic acid, polycitraconic acid, polyfumaric acid, polymaleic acid, polymethaconic acid, poly-α-hydroxyacrylic acid, polyvinylphosphonic acid, sulfonated polymaleic acid, maleic anhydride-diisobutylene copolymer, maleic anhydride-styrene copolymer, maleic anhydride-methyl vinyl ether copolymer, maleic anhydride-ethylene copolymer, maleic anhydride-ethylene crosslink copolymer, maleic anhydride-vinyl acetate copolymer Polymer, maleic anhydride-7crylonitrile copolymer, maleic anhydride-acrylic ester copolymer, maleic anhydride-butadiene copolymer, maleic anhydride-isoprene copolymer, maleic anhydride and carbon monoxide Poly-β-ketocarboxylic acid, itaconic acid, ethylene copolymer, itaconic acid-aconitic acid copolymer, itaconic acid-maleic acid copolymer, itaconic acid-acrylic acid copolymer, malonic acid derived from
methylene copolymer, methaconic acid-fumaric acid copolymer, ethylene glycol-ethylene terephthalate copolymer,
Vinylpyrrolidone-vinyl acetate copolymer, 1-butene-
2,3,4-) recarboxylic acid-itaconic acid-acrylic acid copolymer, polyester polyaldehyde carboxylic acid with quaternary ammonium group, cis- of epoxysuccinic acid
isomer, poly(N,N-bis(carboxymethyl)
Polyelectrolytes such as acrylamide), poly(oxycarboxylic acids), starch succinic acid or maleic acid or terephthalic acid esters, starch phosphate esters, dicarboxy starch, dicarboxymethyl starch, carboxymethyl cecilerose, and succinate esters.

6) Non-dissociable polymers such as polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, cold water soluble urethanized polyvinyl alcohol.

7) Diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, cyclopencune-1,2,3,
4-tetracarboxylic acid, tetrahydrofuran-1,2,
3,4-tetracarboxylic acid, tetrahydrofuran-2,
Carboxymethylated products of 2,5,5-tetracarboxylic acid, citric acid, lactic acid, tartaric acid, sucrose, lactose, raffinose, etc., carboxymethylated products of pentaerythritol, carboxymethylated products of gluconic acid, polyhydric alcohols or sugars and anhydrides Condensates of maleic acid or succinic anhydride, condensates of oxycarboxylic acids and maleic anhydride or succinic anhydride, benzene polycarboxylic acids represented by mellitic acid, ethane-1,1,2,2-
Tetracarboxylic acid, ethene-LL2.2-tetracarboxylic acid, butane-1,2,3,4-tetracarboxylic acid, propane-L2,3-tricarboxylic acid, butane-1,4
-Dicarboxylic acid, oxalic acid, sulfosuccinic acid, decane-
Organic acid salts such as 1,10-dicarboxylic acid, sulfotricarballylic acid, sulfoitaconic acid, malic acid, oxydisuccinic acid, gluconic acid, 0MO3, Builder M, etc.

(2) Re-staining prevention agent The composition may further contain one or more of the following compounds as a re-staining prevention agent in an amount of 0.1 to 5%.

Polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, etc.

(3) Bleach agents such as sodium percarbonate, sodium percarbonate, and sodium sulfate hydrogen peroxide adducts.

(4) Enzymes (enzymes that perform their original enzymatic action during the cleaning process) Classified based on their reactivity, they include hydrolases, hydrolases, oxidoreductases, desmolases, transferases, and isomerases. , both are applicable to the present invention. Particularly preferred are hydrolases, including proteases, esterases, carbohydrases and nucleases.

Specific examples of proteases include pepsin, trypsin, chymotrypsin, collagenase, keratinase, elastase, sptilisin, BPN, papain, promelin,
These are carboxypeptidase A and B, aminopeptidase, and aspergylopeptidase A and B.

Specific examples of esterases include gastric lipase, pancreatic lipase, plant lipases, phospholipases, cholinesterases, and bosphotases.

Carbohydrases include cellulase, maltase, saccharase, amylase, pectinase, lysozyme, α-
Included are glycosidases and β-glycosidases.

(5) Blue tinting agent Various bluing agents can also be added as necessary.

For example, the following structure is used: (In the formula, the residue represents a blue to purple monoazo, disazo, or anthraquinone dye, and X and Y are a hydroxyl group, an amino group, a hydroxyl group, a sulfonic acid group, or a carboxylic acid group. group, an aliphatic amino group which may be substituted with an alkoxy group, a halogen atom, a hydroxyl group, a sulfonic acid group, a carboxylic acid group, a lower alkyl group, an aromatic amino group which may be substituted with a lower alkoxy group, or It is a cycloaliphatic amino group.

R is a hydrogen atom or a lower alkyl group. However, if R represents a hydrogen atom and ■X and Y are water B at the same time,
5 or the alkanolamino method, and (2) cases where either one of X and Y is a hydroxyl group and the other is an alkanolamino group is excluded. n represents an integer of 2 or more. ) (In the formula, D represents a blue to purple azo or anthraquinone dye residue, and X and Y represent the same or different alkanol amino residues or hydroxyl groups.) (6) Anti-caking agent para-toluenesulfone Km , xylene sulfonates, acetates, sulfosuccinates, talc, finely divided silica, clays, calcium-silicates (e.g. Johns Man
vi11 microcell, etc.), magnesium oxide, etc.

(7) Antioxidant tert-butylhydroxytoluene, 4,4゛-butylidenebis-(6-tert-butyl-3-methylphenol), 2
．． 2'-butylidene bis-(-tert-butyl-4-methylphenol), monostyrenated cresol, distyrenated cresol, monostyrenated phenol, distyrenated phenol, 1,1'-bis=(4-hydroxyphenyl)cyclohexane, etc. antioxidant.

(8) Fluorescent dye 4.4'-bis-(2-sulfostyryl)-biphenyl salt, 4.4'-bis-(4-chloro-3-sulfostyryl)-biphenyl salt, 2-(styrylphenyl) Naphthothiazole derivative, 4,4゛-bis(triazole-2
The composition may contain 0 to 1% by weight of one or more of the following: -yl) stilhene derivatives and bis(triazinylamino)stilhene disulfonic acid derivatives.

(9) Photoactivated bleach One or two of sulfonated aluminum phthalocyanine and sulfonated zinc phthalocyanine are added to the composition in an amount of 0 to 0.
It can be contained in an amount of 2% by weight.

00) Fragrance Binders that can be used in the present invention include carboxymethyl cellulose, polyethylene glycol, water-soluble polymer solutions such as polycarboxylic acid salts such as sodium polyacrylate, polyoxyethylene alkyl ether, fatty acid monoethanolamide, fatty acid jetanol. Examples include nonionic substances such as amides, aqueous sodium silicate solutions, and water.

In practicing the present invention, spray-dried detergent particles can be obtained as follows. That is, thermally unstable raw materials,
For example, excluding sulfur, bleach, and inorganic builders that do not require drying, such as sodium carbonate and sodium sulfate, anionic surfactant solutions that require drying, aluminosilicate slurries, fluorescent dyes, pigments, etc. Spray dry the slurry. If the spray-dried particles are highly sticky, it is optional to incorporate sodium carbonate, sodium sulfate, sodium silicate, etc. into the detergent slurry.

The apparent specific gravity and particle size of the spray-dried detergent particles do not matter. The water content is preferably 12% or less. If there is more water than that, it will have a negative effect on the fluidity of the particles after granulation.

Next, the pulverizing step in the method of the present invention will be explained.

The spray-dried detergent particles are ground to obtain a fine powder. For pulverization, a shearing type using a knife cutter rotating at high speed is suitable, but a pulverization method using shearing and compression using a kneader is also applicable. In the pulverizing process, it is effective to mix and use a part of the surface modifier described above to prevent adhesion to the pulverizer. Also, in this step, other inorganic and/or organic raw materials of the detergent other than the spray-dried product may be mixed.

The fine powder generated from the spray drying equipment and collected by the dust collection equipment can be used alone or in combination with the above-mentioned fine powder obtained by pulverization.

Following the above process, a mixer with a horizontal stirring shaft inside a horizontal mixing tank and a stirring blade attached to this shaft mixes the powder, or a mixer with a chopper for crushing or dispersing inside this tank. Mix and granulate while adding surface modifier and binder. The surface modifier and the binder may be added at the same time, one of them may be added first, or they may be added alternately.

In this step, it is optional to mix other inorganic and/or organic raw materials of the detergent.

As examples of the mixer used in the present invention, any of the Ledige Mixer (Ladige Co., Ltd.), Suno I) Retan Reuser (Fuji Paudal Co., Ltd.), and Bag Mixer (Fuji Paudal Co., Ltd.) can be used.

The detergent particles produced by the present invention can be easily distinguished from detergent particles produced by other methods because they have the following two characteristics.

One of these is that the particle surface is covered with a surface modifier, which can be easily confirmed by observation with an electron microscope.

Another feature is that the detergent particles of the present invention are composed of mechanically broken, spray-dried particles. This is easy because when detergent particles are soaked in ethyl alcohol, the detergent particles of the present invention become a fine powder and disperse, whereas particles of laundry detergent spray-dried on cars do not disperse in this way. It can be confirmed.

〔Example〕

Examples of the present invention are shown below, but these Examples do not limit the present invention.

Example 1 A detergent having the following composition was spray dried.

Linear alkyl hanzene sulfonate 35 Parts by weight Alkyl sulfate ester salt 1011 Sodium carbonate 21.5 Sodium silicate 7 Sodium aluminosilicate 14 Sodium sulfate
6 Nonionic surfactant
3.5 Moisture 3
The average particle diameter of the obtained detergent particles was 430 μm, and the apparent specific gravity was 0.29 g/−.

3 parts by weight of aluminosilicate fine powder with an average particle size of 2.7 μm was mixed with 100 parts by weight of the detergent particles using a blender, and then pulverized using a flash mill (manufactured by Fuji Paudal Co., Ltd.) equipped with a 24-mesh screen. A powder with an average particle size of 190 μm and an apparent specific gravity of 0.39 was obtained.

100 parts by weight of this powder, 2.5 parts by weight of water, average particle size 27
4 parts by weight of micron aluminosilicate fine powder was placed in a Ledige mixer (Adige), stirred and granulated, and then coarse particles were removed using a 16-mesh sieve.

The apparent specific gravity, average particle size, and fluidity of the detergent thus obtained were measured and are shown in Table 1 together with other Examples and Comparative Examples.

Here, the fluidity of the powder is determined by measuring the time required for 100-g of powder to flow out from a hopper for measuring specific gravity as specified in JIS K 3362, and the shorter the time, the greater the fluidity. is judged to be good.

Example 2 In Example 1, 1 part by weight of silicon dioxide fine powder having a particle size of 20 mμ (0.02 μm) was used instead of the aluminosilicate fine powder used for stirring and granulation.

Example 3 In place of the aluminosilicate fine powder used for stirring and granulation in Example 1, 2 parts by weight of the same aluminosilicate and 2 parts by weight of talc fine powder with an average particle size of 1.5 μm were combined. I used it.

Comparative Example 1 In Example 1, the stirring granulation was carried out without using a surface modifier.

Comparative Example 2 In Example 1, the amount of aluminosilicate added during stirring and granulation was changed to 40 parts by weight.

Table 1

Claims (1)

Claims: 1. After grinding a spray-dried product of a detergent containing at least one surfactant and at least one builder,
Agitation granulation processing is performed in the presence of a surface modifier and binder using a mixer that has a horizontal stirring shaft inside a horizontal mixing tank and a stirring blade attached to this shaft to mix the powder. A method for producing a high-density granular detergent with improved fluidity. 2. The manufacturing method according to claim 1, wherein the surface modifier is an aluminosilicate. 3. The manufacturing method according to claim 2, wherein the aluminosilicate has an average primary particle diameter of 10 μm or less. 4 The surface modifier is silicon dioxide with an average diameter of 10 μm or less,
The manufacturing method according to claim 1, which is an inorganic fine powder such as bentonite, talc, or clay. 5. The manufacturing method according to claim 1, wherein the surface modifier is a metal soap having an average diameter of 10 μm or less. 6 0 parts of surface modifier per 100 parts by weight of spray-dried product
．． The method according to any one of claims 1 to 5, wherein the amount is 5 to 35 parts by weight. 7. The manufacturing method according to any one of claims 1 to 6, in which a powder or granular inorganic raw material or (and) organic raw material other than the spray-dried product is added and granulation is performed at the same time.