KR950006835B1 - Method for making a cleaner with a remove grease and rust preventive - Google Patents

Abstract

The detergent reduces the cleansing time of contaminated machinery and metal pipes in power plants, oil refinery and chemical plants by using ethylene glycolmonobutyl ether and alky benzene. The manufacturing method for the detergent comprises (A) mixing ethylene glycolmonobutyl ether with alkyl benzene, α-olefine and dodecylbenzenesulfonate; (B) adding citric acid or hydroxy acetic acid as an organic acid, hydrochloric acid or sulfuamic acid as an inorganic acid, vitamine-L as a reducer and several additives.

Description

Preparation of degreasing, degreasing detergent

The present invention is a degreasing and degreasing detergent for removing contaminated oil, scale, etc. of various machinery or commercial facilities, and is an ethylene glycol monobutyl ether (Ethylene glycolmonoutyl ether) which is soluble in water and does not degrade corrosion inhibitory function as an oil remover. Butyl oxytol (Alkyl, Eter)], the alkyl benzene (Alkyl Benzene), α-olefin (α-Olefine), dodecylbenzenesulfonate (Dodecylbenzenesulfonate), etc. The present invention relates to a method for manufacturing a degreasing detergent.

More specifically, butyl oxytol is used as a theme, and a small amount of alkyl ether or alkyl benzene is mixed with a small amount of α-olefin and dodecyl benzene sulfonate, and organic or inorganic acid ignorance inhibitors, dissolution accelerators, A proper amount of reducing agent, adhesive and the like can be effectively degreased and degreased.

An object of the present invention is to clean and degrease metal pipes, various workpieces, and other facilities in a short amount of time to clean and particularly pollute oils of power plants, oil refineries, chemical plants, and other industrial facilities. The purpose is to remove the back from the substrate cleanly.

Conventional surfactants are roughly classified into cationic surfactants and anionic surfactants and nonionic surfactants and zwitterionic surfactants, and are adsorbed or reheated at the interface between the gas-liquid, liquid-gas, and liquid-solid, and the interface or surface thereof. It is a substance that changes the properties of remarkably.

The adsorption property of the surfactant is due to the structural properties of the surfactant, and in general, it is used to change the interfacial energy with a dilute solution and to reduce the surface tension with an aqueous solution.

Surfactants have been developed from soaps to dyeing aids, affective agents and finishing agents in the textile industry. Currently, with the advances in the chemical industry, synthetic detergents, synthetic resins, emulsifiers for neutralizing emulsifiers, pesticide emulsifiers, metal cleaners and antistatic agents And dispersants, emulsifiers, flocculants, foaming agents, penetrants, flexibilizers, etc. and all kinds of preparations in all industries, and the kinds are also being studied.

Cationic ionic surfactants generally do not inhibit corrosion inhibition on metal surfaces, but the removal effect of oil is reduced, whereas anionic surfactants have both anionic hydrophilic and cationic hydrophilic groups in the solution. Anion and cation dissociate and act as anionic on alkali side, cation on acidic side and nonionic activator near neutral.

The dissociation state by the difference in pH is as follows.

Moreover, as a factor which changes the performance of an amphoteric surfactant,

(1) Lipophilic properties: Alkaline hemihydrogen, unsaturated, etc.

(2) Anionic and Cationic Balance: Monoamino Monocarboxy, Monoamino-Dicarboxy, Polyamino-Sulfate

(3) pH conditions, etc. are mentioned.

In the vicinity of the isoelectric point, the foaming force of the surfactant decreases rapidly, but in general, it shows good foaming force in acidic and alkaline liquids.

Many cationics have a low cleaning power in the same shape as the activator of the cation. Therefore, it is not suitable for washing purposes, such as shampoo cleaning.

Therefore, petrochemical solvents are good for removing mechanical oil, cutting oil, etc., but they are not soluble in water and are not preferable for use because they are accompanied by a risk of fire.

Conventional degreasing and degreasing agents have been partially removed by the combined use of acids and surfactants only when oil components of less than 100 ppm are contained.

In view of these problems and the physical and chemical properties of detergents in the prior art, the present invention is well soluble in water and does not deteriorate the corrosion inhibiting function of steel pipes. It has developed a new degreasing and degreasing agent that can be degreased efficiently.

That is, the present invention is as good solubility in water, does not inhibit the corrosion suppression soluble agent ethylene glycolate come monobutyl acetate as oil removers, aliases butyloxy tolyl _{(C 4 H 9 OCH 2 CH} 2 OH, boiling point: 230.6 ℃, flash point 116 ° C, refractive index 1.4316), and a small amount of alkyl benzene (Alkyl benzene, flash point 140.6 ° C) and α-olefin (Olefin: C = C) are added, and then the appropriate detergents are formulated in an appropriate amount. It is manufactured by.

Organic acids: citric acid, foromic acid, hydroxy acetic acid, etc.,

Inorganic acids: hydrochloric acid, lactic acid, phosphoric acid, acetic acid, sulfamic acid, hydrofluoric acid, etc.

Corrosion inhibitors: corrosion inhibitors for organic acids, corrosion inhibitors for inorganic acids

Dissolution Promoter: Ammonium Hydrogenfluoride (aka Ammonium Bifluoride), Thiourea

Reducing Agent: Vitamin L (Vitamine-L)

Adhesion: Wetting agent (cationic, anionic, nonionic, zwitterionic)

Selectively appropriate amount of the formulation is used in combination with the degreaser and the mixing ratio is adjusted according to degreasing degreasing conditions.

The degreasing degreasing agent of the present invention can reduce waste liquid compared to the conventional one, and has no inhibition of corrosion inhibitive function, is soluble in water, and can exhibit excellent degreasing degreasing effect as compared with weakly acidic preparations of alkyl sulfadate produced in Japan. have.

Example 1

30 weights of citric acid

Ammonia 22% by weight

3% by weight of corrosion inhibitor for organic acid

2% by weight of ammonium bifluoride

Thiourea 2% by weight

3% by weight of reducing agent (Vitamine-L)

Butyl oxytol 30% by weight

Nonionic adhesive 0.1 ~ 5% by weight

Alkylbenzene 0.1 ~ 10 wt%

0.1-10 wt% of α-olefins

The detergent of the composition is diluted in 10 times of water and placed in an iron tube to be degreased and degreased and circulated for 5 hours at 80 末 5 ° C.

Looking at the scale formation process of the iron pipe to be cleaned with the degreasing degreasing agent of Example 1 When the scale (such as pure distilled water) is used for the scale (heat) of the heat installation of the high-pressure boiler, silica (SiO ₂ ) And some of the following component ratios.

Fe ₂ O ₂ : 36.5 ~ 80.6%, CuO: 9.3 ~ 26.5%, SiO ₂ : 0.06 ~ 0.7%

CaO: 0 ~ 2%, MgO: 0 ~ 0.5%, ZnOP ₂ O ₂ : 0 ~ 5.4%

There are some differences depending on the material and the type of fluid. In this case, about 3% of diluted citric acid is suitable for dissolution of CaO, MgO, ZnO, P ₂ O ₂ , Fe ₂ O ₃ , and 25% of ammonia is excellent for dissolution of copper oxide. silver,

C ₆ H ₈ O ₇ + 2NH ₄ OH COONH ₄ CH ₂ C (OH) COOH CH ₂ COONH ₄ + 2H ₂ O

Part of which is made of diammonium hydrogen citrate, which forms complex salts with iron, leaving no residues, so it can be cleaned cleanly. (Chelate) is not formed and the hearing loss falls.

In Example 1, the corrosion inhibitor is suitable for protecting the base material when the Fe material appears well, and is effective at about 0.03% or more, but is considered to be about 0.3% at 10 times in consideration of side reactions.

If you use more than that, there is no effect on the loss of corrosion.

Ammonium bifluoride is effective for removing SiO ₂ and has excellent penetration effect during the reaction. However, when 0.2% or more is used, 2% was used for preparing the stock solution because it was difficult to use the experimental apparatus due to super corrosion.

In addition, the thiourea in Example 1, when the copper component appears due to the Cu ion containment, it is uneconomical to use more than 0.2% in terms of the copper component ratio as a function of suppressing further corrosion.

Further reducing agents (Vitamin-L) is oxidized to Fe ⁺⁺ → as Fe ⁺⁺⁺ is in Fe ^{++ 0} -Fe doemeuro Fe ⁺⁺⁺ ion when this is more than 150PPM corrosion suppression is reduced, a highly corrosion-decrease Fe ⁺ → Fe ^{++ ++} as it is necessary to reduce as Fe ⁺⁺ → Fe ^0.

Therefore, it is suitable to add about 0.3% of a reducing agent in an amount sufficient to reduce about 300 PPM of Fe ions, so it is ideal to use 3% when preparing the stock solution.

Generally, there are many kinds of container solvents for removing oils and fats, but in most cases, since they are non-aqueous, they can be effectively used together with pickling. In Example 1, butyl oxytol was used.

When using 3% butyl oxytol in consideration of the case where there is a lot of oils for maximum cleaning effect, it can react with about 30,000PPM oil, but when 30% or more of the stock solution is used, the reaction amount of other chemicals is reduced. No longer used.

In addition, since the nonionic surfactant is effective in removing animal fats and mineral fats, a lot of bubbles are generated, so it is preferable to use about 0.01% unless otherwise specified. If the amount is higher than 0.5%, the main purpose is to wash the oil. However, since the gel state and viscosity are high when blending, it is difficult to effectively clean the product. Difficult and ineffective.

In addition, alkyl benzene is useful for removing aromatic or alicyclic fats and oils, and in general, it is preferable to use about 0.01%. However, when using more than 10% when preparing the stock solution is not properly prepared in the form of separation in Example 1 of the present invention used 0.1 to 10%.

α-olefins are useful for the removal of chain fats and oils, and are generally used in amounts of about 0.01% because of the significant effect of small amounts of chemicals. ˜10% was used.

Therefore, as a result of washing with the degreasing degreasing agent of Example 1, the cleaning effect was excellent, with iron dissolution of about 15,000 PPM oil component dissolution of about 2000 PPM, and corrosion of the pipe was suppressed, and thus the condition of the pipe was good.

Example 2

50% by weight phosphoric acid

3% by weight of corrosion inhibitor for inorganic acid

4% by weight of ammonium bifluoride

Thiourea 1% by weight

Reducing agent 2% by weight

20-30% by weight of butyl oxytol

Nonionic Adhesive 0.1 ~ 10% by weight

0.1-10 wt% of α-olefins

The detergent of the composition was diluted with 5 times of water and put in a degreased tube.

Rinse for 4 hours at 0 ° C.

The scale component ratio of the installation which will use the degreasing degreasing of Example 2 is as follows.

High Pressure Boiler: Fe ₂ O ₃ , Fe ₃ O ₄ , CuO, Cu, SiO ₂

Medium and low pressure boilers: Fe ₂ O ₃ , Fe ₃ O ₄ , CaSO ₂ , SiO ₂ , CaO ₃ , CaSiO ₃ , MgSiO ₃

Coal Apparatus: FeS, C,

Chiller System: Fe ₂ O ₃ , CaSO ₄ , MgCO ₃ , CuO, Organics

Phosphoric acid is effective to remove scales of Fe, CU, Mg. When using more than 50% by weight, it is difficult to prepare solution when dissolving ammonium bifluoride and thiourea reducing agent. If the descaling effect is much lower.

In addition, the corrosion inhibitor does not have a significant effect on the corrosion inhibiting function at 0.1% or more, but may be added up to 0.6% for the interference of acid increase reaction and the safety of the equipment.

In Example 2, the corrosion inhibitor was used 3% when preparing the stock solution. Ammonium bifloid was increased by 2 to 4 times higher than the reaction at high temperature by reacting at low temperature, thereby facilitating the reaction, and 4% was used in preparing the stock solution to be effective for descaling the SiO ₂ system.

Since thiourea reacts at low temperature, the Cu ion blocking effect can be reduced even at high temperature. However, the small amount of CuO descaling and Cu ion blocking effect are shown at the same time. 1% was used when preparing the stock solution.

The reducing agent mainly used the reaction rate Fe ⁺⁺ → Fe ⁺⁺⁺ change rate is less active at high temperature, but the concentration was 0.4% due to the interference and the increase of acid concentration was used to prepare the stock solution 2%.

Butyl oxytol was able to remove 40,000PPM of oil as the concentration of 4%, but 20-30% was used in preparing the stock solution by dissolving some of the α-olefin and nonionic adhesive and reacting the rest.

Nonionic surfactants and α-olefins are the same as in Example 1.

Therefore, the result of washing with the degreasing degreasing agent of Example 2 was excellent washing action with iron dissolution 12,000PPM, oil component dissolution 3,000PPM.

Moreover, the state of a pipe | tube was favorable without the fall of the corrosion suppression function of a pipe | tube.

In addition, since the detergent of the present invention has a high flash point, there is no risk of fire and can be safely washed, and many oil components have been removed cleanly.

Claims (2)

In degreasing degreasing, it is based on butyloxytol as a degreaser, and a small amount of alkyl benzene, alkyl ethyl and α-olefins are mixed and organic acid is prepared as citric acid, ureic acid or hydroxyacetic acid. And an inorganic acid, which may be used in combination with one or two or more formulations of hydrochloric acid, phosphoric acid, lactic acid, sulfamic acid, hydrofluoric acid, and the like, and are prepared by adding a corrosion inhibitor, a dissolution promoter, a reducing agent, and an adhesive. Preparation of degreasing degreasing detergent. The method of claim 1, wherein the reducing agent uses a vitamin-L (Vitamine-L) manufacturing method of the degreasing decleaning agent.