SU1661199A1 - Method of producing liquid laundry soap - Google Patents

Abstract

The invention relates to the oil industry. The aim of the invention is to improve the quality of the finished product, reduce the consumption of hydrogen peroxide and reduce the duration of the process. The method involves the saponification of fatty mixtures with caustic soda until the alkali content in soap is 0.2–0.3%, the addition of sodium chloride in an amount of 3–5%, the treatment with hydrogen peroxide in several stages, the first of which takes hydrogen reducing the alkali content in soap to 0.1%; after treatment with hydrogen peroxide, soda ash is introduced into the soap until the initial alkalinity of the soap is reached, then other stages of hydrogen peroxide treatment are performed with soda ash injected until complete clarification soap. 1 tab.

Description

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The invention relates to the oil industry.

The aim of the invention is to improve the quality of the finished product, reduce the consumption of hydrogen peroxide and reduce the duration of the process.

The fat mixture is washed with caustic soda until the alkali content in soap is 0.2-0.3%, sodium chloride is added in an amount of 3-5%, the resulting soap is treated with hydrogen peroxide in several stages, the first of which is hydrogen peroxide necessary to reduce the alkali content in soap to 0.1%, after treatment with hydrogen peroxide, soda ash is introduced into the soap until the initial alkalinity of the soap is reached, then other processing steps are carried out

hydrogen peroxide with the introduction of soda ash to complete clarification of the soap.

Under the chosen conditions, the clarification process is carried out in the optimal alkalinity range of 0.1-0.3% and under the best conditions of contacting hydrogen peroxide with soap, which allows to obtain soap with enhanced detergent action, improved dense texture and without odorizing agents. Adding sodium chloride in an amount of less than 3% makes the soap mass less mobile, which makes it difficult to contact it with hydrogen peroxide, increases its consumption and lengthens the clarification process. Increasing the concentration of sodium chloride in excess of 5% makes the soap mass excessively mobile and impairs its consistency and quality. Conducting clarification outside the alkalinity range

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0.1-0.3% reduces the speed of the process and leads to an increase in the consumption of hydrogen peroxide.

Example. Soap stock with 40% fatty acid content is washed in laboratory conditions with 40% aqueous solution of caustic soda to an alkali content in a soap mass of 0.2%. Then, with stirring, 3% of dry sodium chloride is added to the soap mass. The soap mass is cooled to 80 ° C and a 20% aqueous solution of hydrogen peroxide is introduced into its lower layer for 20 minutes until the alkali content reaches 0.1%. The amount of hydrogen peroxide is equal to 0.7% by weight of liquid soap in terms of perhydrol s. hydrogen peroxide concentration of 30%. Then a 40% aqueous solution of soda ash is added to the soap mass to an alkali content in soap of 0.2% and hydrogen peroxide is again fed as described above, the duration of hydrogen peroxide supply is 25 minutes, its amount is 0.8% by weight of liquid soap . After that, a 40% solution of soda ash is again added to the soap until the alkali content in the soap is 0%, and then hydrogen peroxide is supplied until the soap is completely clarified. The duration of hydrogen peroxide supply is 15 minutes, its amount is 0.5%. The total processing time of the soap to its full clarification is 1 hour, with the consumption of hydrogen peroxide 2% of the mass of soap in terms of 30% perhydrol. The soap has a high detergency due to the minimal destruction of fatty raw materials by hydrogen peroxide, a dense texture and a neutral smell. The results of the known and proposed methods are given in the table.

From the presented data it follows that the use of soap for the clarification

mass with an alkali content of more than 0.3 and less than 0.2%, and the concentration of sodium chloride more than 5 or less than 3% does not lead to a significant reduction in the consumption of hydrogen peroxide and accelerate the process.

Thus, the use of an additive of sodium chloride in the soap mass in the amount of 3-5%, treatment with hydrogen peroxide to alkaline content in soap to OJ%, input of soda ash to achieve the initial alkalinity of soap and re-treatment with hydrogen peroxide and soda ash to completely clarify the soap allowing They improve the quality of the finished product, reduce the consumption of hydrogen peroxide and shorten the process time.

Claims (1)

Invention Formula The method of obtaining liquid household soap, including the saponification of fatty mixtures with caustic soda to the alkali content in soap of 0.2-0.3% and clarification of soap hydrogen peroxide treatment, characterized in that, in order to improve the quality of the finished product, reduce the consumption of hydrogen peroxide and reduce the duration of the process, after saponification sodium chloride is introduced into the soap in an amount of from 3 to 5% of its mass; the treatment with hydrogen peroxide is carried out in several stages, at the first of which hydrogen peroxide is taken in an amount necessary to reduce the alkali content in soap to 0.1% after treatment hydrogen sulphide is introduced into the soap with hydrogen peroxide until the initial alkalinity is reached, then other hydrogen peroxide treatment steps are carried out with soda ash added until the soap is completely clarified.