Chemical name: coconut oil fatty acid diethanolamide English name: Coconut diethanolamide abbreviation: CDEA trade name: 650 1, Nainal alias: N, N, N.N- dihydroxyethyl alkyl amide, coconut oil diethanolamide, coconut oil diethanolamide, alkyl alcohol amide. Molecular formula: c11h23con (ch2ch2oh) 2. Molecular weight: 287.5438+06. Usage: This product belongs to nonionic surfactant and has no cloud point. It is a light yellow to amber viscous liquid. Soluble in water, it has good functions such as foaming, foam stabilization, osmotic decontamination and hard water resistance. Belonging to nonionic surfactant, it is compatible with anionic surfactant when it is acidic, and its thickening effect is particularly obvious. It is compatible with many surfactants. It can enhance the cleaning effect, and can be used as additive, foam stabilizer and foam assistant, and is mainly used for manufacturing shampoo and liquid detergent. It forms an opaque mist solution in water, which can be completely transparent under certain stirring. It can be completely dissolved in different kinds of surfactants at a certain concentration, and can also be completely dissolved in low carbon and high carbon. Synthesis principle: (1) Direct synthesis of fatty acids and diethanolamine: This method is simple in process, but it has high cost and many side reactions, and is rarely used. (2) The refined oil directly reacts with diethanolamine. Also called one-step method. In practice, alkanolamides are usually made of fatty acids (FA) and excess diammonium diacetate (DEA)( 1:2, 1: 1.5 type) to ensure the complete reaction of fatty acids. The obtained product is a combination of amide and DEA with equal mole, and has good water solubility. This method has low cost, but the color of the product is dark. Therefore, it is not competitive in the international market, so at present, domestic small and medium-sized manufacturers often adopt this method. (3) laurate is produced by the vinegar exchange reaction between coconut oil and alcohol, and then reacts with diethanolamine to produce the product, which is also called two-step method. At present, large enterprises at home and abroad adopt advanced methyl ester method, which has low reaction temperature, good transparency and high thickening performance. The content of lauric acid diethanolamide can reach more than 85%, and the cost of raw materials is the same as that of one-step method. Therefore, this product has strong competitiveness. The transesterification process is relatively complex, and the synthesis process involves methanol dispersion, labor protection, fire prevention and explosion prevention. If higher fatty acid methyl ester is synthesized from oil and methanol, glycerol in the product needs to be further separated. Therefore, the investment in methyl esterification equipment is relatively large, and strict post-management is needed. Traditional 650 1 products are all made of coconut oil. In recent years, due to the rising price of coconut oil, more and more manufacturers use palm oil, cottonseed oil and other oils to partially replace coconut oil. Due to the large molecular weight and high melting point of the finished product, it is much more viscous than the alcohol coconut oil product at room temperature, so it can be divided into two types according to the amount of palm oil added: high viscosity and ultra-high viscosity.