CS238069B1 - Process for the preparation of liquid detergents and liquid cosmetics - Google Patents

Abstract

The invention consists in neutralizing the acidic form of a synthetic surfactant with a neutralizing agent, for example ammonia, sodium or potassium hydroxide, or with some organic bases such as mono-, di-, triethanolamine, in a weight ratio of 1:0.05 to 1.3, preferably 1:0.1 to 0.5, based on 100% surfactant, in the presence of a mono- or dihydric alcohol.

Description

The invention relates to a process for preparing liquid detergents and liquid cosmetic compositions.

The prior art processes operate in a discontinuous manner using predominantly for the preparation of liquid detergents and liquid cosmetics simple mixing containers into which the individual raw materials or their mixtures are gradually metered under constant stirring. Mixed vessels used are equipped with a system allowing the heating or cooling of the entire volume in addition to various types of stirrers. In order to maintain the desired composition of the composition in this way, the raw materials must be weighed or weighed before being metered into the stirred vessel. This technology for preparing detergents and liquid cosmetics is energy intensive.

These drawbacks of the preparation of liquid detergents and liquid cosmetics are eliminated by the process according to the invention, characterized in that the acid form of the synthetic surfactant is neutralized by a neutralizing agent, for example ammonia, sodium or potassium hydroxide, or certain organic bases such as mono-, di- triethanolamine, in a weight ratio of 1: 0.05 to 1, preferably 1: 0.1 to 0.5, based on 100% surfactant in the presence of a mono- or dihydric alcohol, preferably ethanol or ethylene glycol, wherein the weight ratio of alcohol to the acid form of the surfactant is 1: 9 to 4: 1, while homogenizing with at least one component of the finished liquid detergent or cosmetic composition.

This process significantly changes the physicochemical properties of the acidic form of the synthetic surfactant, in particular the viscosity and temperature increase by the released mixing and neutrons.

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- 2 lizing heat. These changes accelerate the process of neutralization, which in conjunction with the use of static mixers allows the entire process of liquid detergent and cosmetic preparation to be continualised. Another consequence of the positive changes in the physicochemical properties of the acid form synt. The surfactant is the fact that the neutralization can take place in one- to multi-component liquid detergent or cosmetic systems. The neutralization of the acid form of the surfactant in the presence of alcohol significantly reduces the viscosity, as shown in the following table.

viscosity at 25 ° G / Pase »/

the acid form of the surfactant ethanol content wt 0% 10% 50% 80% alkylbenzenesulfonic acid C8 to C8 1.87 0.425 0.012 0.006 olefin sulfonic acid C 1-6 5,633 0,436 0,034 0.013

The resulting neutralization heat is utilized by the cell to heat the reaction medium itself or to increase the dissolution rate of the additional components or mixtures thereof, the final temperature; The amount of product to be used depends on the ratio of the rates of the acidic surfactant dosage form to the other dosage components. The acid forms of the surfactant used are, for example, alkylarylsulfoacids, alkanesulfoacids, alpha-olefin sulfoacids, alkyl sulfosuccinic acid esters and the like, preferably alkylbenzenesulfoacids. Maintaining the final product temperature in the range of 10 to 60 ° C is given by the weight ratio of the acid form of the surfactant to the other dosed components of the composition or mixtures thereof in the range of 1:50 to 0.5, preferably 1: 4 to 10, Deň: 32 ° C.

For this purpose, a set of metering pumps and static mixers of different design and technological arrangement is used.

A further advantage of preparing the liquid detergent and liquid cosmetic compositions of the invention is that it is possible to dispense the individual components of the composition or mixtures thereof simultaneously or sequentially in the various stages of preparation, optionally in the desired order. The advantage of the process according to the invention is low energy consumption a

- 5 238 089 minimum space requirements. This fact also implies the possibility of a modular arrangement of the whole device and its rapid adaptability according to the requirements of the product composition and technology.

The process for preparing the liquid detergents and liquid cosmetic compositions of the present invention is further described in several examples.

EXAMPLE 1 580 kg of alkylbenzene sulfoacid were metered into a static mixer at a rate of 216.7 kg h-1 ethyl alcohol, 2.5 kg h- ¹ hydrogen peroxide and 140 kg h- ¹ aqueous ammonia solution at a concentration of 25. After passing through the static mixer, the mixture is neutralized. To the thus prepared active substance, a homogenized mixture resulting from the passage of 420 kg h -1 of sodium alkyl polyglycol ether sulfate, 512.5 kg h ^{-1 of} sodium lauryl sulfate, 120.0 kg h ^{-1 of} sodium sulfosuccinate, 22.5 kg h ^{1 of} fatty acid diethyl amide, 10 kg h of sodium nitrilotriacetic acid, 5.75 kg h of perfume and 860 kg of water with a static mixer. The two semi-products are mixed in another static mixer. The resulting detergent is clear, pH 6.

Example 2

575.0 kg h -1 alkylbenzene sulfoacids, 215.9 kg h ^-1 ethanol and 2.5 kg h ^-1 hydrogen peroxide were metered into the static mixer. After passing through the static mixer, the mixture was homogenized. This semi-product was fed with a homogenized mixture resulting from the dosing and mixing of 172.5 kg / ^{l of} sodium alkyl polyglycol ether sulfate, 109 kg / l of ethylene oxide-propylene oxide copolymer, 195 kg / l of diethylene glycol, 148.0 kg / l of 25 wt. % potassium hydroxide solution. The two semi-products were mixed in another static mixer, where, in addition to homogenization, the potassium salt of the alkylarylsulfoacid was formed. After passing through another static mixer, which was simultaneously dosed with 100 kg of h-L sodium sulfosuccinate and 5 kg of h-perfume, a homogeneous universal cleaning agent was formed.

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Example 5

203 kg of alkylbenzene sulfoacid, 5 kg of hydrogen peroxide, 100 kg of ethylene glycol were metered into the static mixer. After passing through the static mixer, the homogenized mixture was fed to another static mixer simultaneously with 92 kg of triethanolamine, where it was neutralized and homogenized. The thus prepared triethanolamine salt of alkylarylsulfoacid was homogenized in a further static mixer with 790 kg h ^-1 sodium alkyl sulphate, 175 kg h ^-1 alkylolamide and 1135 kg h ^-1 "water.

A clear, homogeneous cleaning product is obtained.

Example 4 '

200 kg h ^{-1 of} alkylbenzene sulfoacid, 64 kg h -1 of ethanol, 173 kg h -1 of 25 wt. % aqueous solution of ammonia and 3.1 kg of hydrogen peroxide. The resulting homogeneous semi-product was fed with a mixture of 504 kg h @ -1 · 25 wt.

% citric acid solution, 84 kg h ^-1 ammonium cumene sulphonate, kg h ^-1 oxyethylenated alkylphenol, 2.1 kg h -1 perfume and 21 kg h ^-1 triethanolamine formed by passing through a static mixer. Both semi-products were homogenized in another static mixer to form a liquid detergent.

Claims (2)

Ρ 5 S D M Ϊ NÁ THE INVENTION 2 »OM A process for the manufacture of liquid detergents and liquid cosmetic preparations based on surfactants, solvents, perfumes and other additives, characterized in that the acid form of the synthetic surfactant is neutralized with a neutralizing agent, for example ammonia, sodium or potassium hydroxide, or some organic bases such as mono- di-, triethanolamine, in a weight ratio of 1: 0.05 to 1, preferably 1: 0.1 to 0.5, based on 100% surfactant, in the presence of a mono- or dihydric alcohol, preferably ethanol or ethylene glycol, wherein the weight ratio of alcohol and the acid form of the surfactant is 1: 9 to 4 i.