A process and device for continuously preparing powdery AES particles

Abstract

The invention relates to a process and device for continuously preparing a powdered AES (Atomic Emission Spectrometry) particle. The process is characterized in simple technological process, and the obtained powdered AES particle can be directly applied to the follow-up preparation process of washing powder; and the preparation device is simple in structure. According to the technical scheme, the process for continuously preparing the powdered AES particle comprises the following steps of: 1) feeding a neutralizer, a coating agent and AEO (Fatty Alcohol-polyoxyethylene Ether) acid ester to a high-shear reactor in a ratio; 2) transferring the obtained AES particle into a flash dryer; 3) lowering down the temperature of the AES particle, drying, and maintaining in a certain particle size; 4) transferring into a cyclone separator to separate; and 5) obtaining the finished product. The device for continuously preparing the powdered AES particle comprises the high-shear reactor, the flash dryer, the cyclone separator, a bag-type dust collector and an induced draft fan, wherein the high-shear reactor is respectively provided with an acid ester inlet, a powder inlet, an air inlet, and a material outlet which is communicated with the flash dryer.

Description

technical field [0001] The invention relates to a manufacturing process of surfactant particles, in particular to a manufacturing process of ethoxylated alkyl sodium sulfate particles. Background technique [0002] Ethoxylated Alkyl Sodium Sulfate (AES) is an anionic surfactant based on natural oils and fats. It has excellent decontamination, emulsification, foaming and anti-hard water properties, and is widely used in shampoos, body washes, and dishwashing detergent and other liquid 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 sodiu...

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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

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