Anionic surfactantFatty alcohol polyoxyethylene ether Sulfate (AES) uses C12~C14 coco alcohol as raw material. Sometimes C12~C14 alcohol is also used to condense with 2~4 mol ethylene oxide. Further acidification is carried out, and neutralization is similar to FAS (fatty alcohol sulfate), and sodium chloride, ammonia or ethanolamine can be used.
Fuming sulfuric acid, chlorotic acid, sulfamic acid or gaseous sulfur trioxide can be used as the reactant during sulfation, and good yields can be achieved. Among them, the money salt of AES can be prepared in one step using sulfamic acid. Along with LAS, the gaseous sulfur trioxide sulfation method is the most widely used in industrial production. A small conversion device can be used to convert sulfur trioxide into sulfur trioxide for local use.
In the past two decades, AES production has expanded rapidly at an alarming rate. Taking AES production statistics in the United States as an example, from 1966 to 1980, AES production increased nearly 70 times. The reason is that AES has a series of distinct advantages. For example, it is the least sensitive to water hardness; has excellent biochemical degradation properties; reduces costs due to the introduction of ethylene oxide molecules into fatty alcohols, etc.
In the past, AES has been compounded separately with LAS for the preparation of shampoos and light-duty detergents, such as dishwashing detergents. This is because it does not irritate the skin and can produce foam repeatedly. Of course, the generation of foam is not necessarily the only sign of the effectiveness of a detergent. In the past, ordinary people often used the presence of foam as an indicator of the effectiveness of a detergent.
Now AES is gradually entering the field of heavy-duty detergents. This is due to the reduction of sulfate content in formulas such as washing powder or detergent. tendencies, AES can be considered one of the most important surfactants in household detergent formulations. It is likely to be used in combination with non-ionic surfactants in large quantities. in the coming period. AES will be the anionic surfactant with the fastest growing market demand.
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