A powdery composition containing sodium ethoxylated alkyl sulfate and its preparation method

Abstract

The invention relates to a powdery composition containing ethoxylated sodium alkyl sulfate, and a preparation method of the composition. The invention aims at providing the composition which needs to contain the ethoxylated sodium alkyl sulfate, has the characteristics of good mobility and difficulty in adhesion, and can be directly used for a washing powder distribution technique. The method provided by the invention has the characteristics of simple technique, energy saving and environmental friendliness, and high production efficiency. According to the technical scheme, the composition containing the powdery ethoxylated sodium alkyl sulfate comprises the following components in percentage by weight: 20-45% of ethoxylated sodium alkyl sulfate, 10-30% of water-absorbing auxiliaries, and 20-50% of wrapping agent. The preparation method for the powdery composition containing ethoxylated sodium alkyl sulfate comprises the following steps: I. evenly mixing the ethoxylated sodium alkyl sulfate and the water-absorbing auxiliaries, and aging for 0.5-2 hours; II. adding the wrapping agent and evenly mixing; and III. crushing and then screening through a sieve with 10-50 meshes.

Description

technical field [0001] The invention relates to a powdery composition containing sodium ethoxylated alkyl sulfate and a preparation method thereof. Background technique [0002] Sodium ethoxylated alkyl sulfate is an anionic surfactant based on natural oil. It has excellent decontamination, emulsification, foaming and anti-hard water properties. It is widely used in shampoos, body washes, dishwashing detergents and other liquids. in washing products. However, sodium alkylbenzene sulfonate is usually used as a surfactant in washing powder at present (sodium ethoxylated alkyl sulfate is rarely used), and the reasons are: [0003] 1. The product form of ethoxylated alkyl sodium sulfate is relatively special. When the concentration is 70%, it is a flowing gel paste; when the concentration is less than 28%, it is a transparent liquid; It is a gel paste that is difficult to flow, so it is difficult to apply in powder; and sodium ethoxylated alkyl sulfate has sticky characteristi...

AI Technical Summary

Problems solved by technology

[0003] 1. The product form of ethoxylated alkyl sodium sulfate is relatively special. When the concentration is 70%, it is a flowing gel paste; when the concentration is less than 28%, it is a transparent liquid; It is a gel paste that is difficult to flow, so it is difficult to apply in powder; and sodium ethoxylated alkyl sulfate has sticky characteristics, even if it is produced by agglomeration molding process, the dosage will be limited (generally not more than 2 %);

[0004] 2. Sodium ethoxylated alkyl sulfate is easy to decompose at high temperature, and the main washing powder drying process currently used is high-tower spraying (produced by high-temperature hot air at 250-350 ° C), which cannot be used for ethoxylation Drying and powdering of sodium alkyl sulfate

[0005] Chinese patent CN101942082B discloses a preparation method of powdery AES or AES mixture, which proposes: AES (ethoxylated alkyl sodium sulfate) or AES mixture is dehydrated and dried (water content is less than 5%), and then frozen to produce powder; the weak point of this preparation method is:

[0006] 1. It needs to use special drying and freezing equipment for production, which consumes a lot of energy;

[0007] 2. During the production process, AES will adhere to the inner wall of the drying and freezing equipment and decompose within a period of time, resulting in large material loss;

[0008] 3. It is necessary to regularly clean the drying and freezing equipment to remove the AES adhered to the inner wall of the equipment, which not only reduces the production efficiency, but also produces a large amount of washing wastewater and pollutes the environment