Application of alkanolamide

Alkyl alcohol amide is a nonionic surfactant. As thickener and foam stabilizer, it is widely used in detergents, cosmetics, diesel oil emulsification, antistatic agents in plastics, metal processing cleaning agents and antirust agents, textile additives and surfactants for oil displacement in oilfield exploitation. The reaction of synthesizing alkanolamide is very complicated, but the main reactions of synthesizing fatty acid or biodiesel are as follows:

In addition, it is worth noting that the patent documents published by Henkel Company [22, 23] report that coconut oil directly reacts with monoethanolamine under the catalysis of acid to synthesize coconut oil monoethanolamide. As long as the by-product glycerol is continuously removed, the yield of amide can be improved.

Compared with the first two methods, using biodiesel as raw material not only greatly improves the activity of synthesizing alkanolamide, but also reduces the requirements for equipment and shortens the reaction time. Please refer to the following table:

Table 2: Effect of raw materials on reaction conditions

Table 2: Influence of raw materials on reaction conditions: raw material equipment temperature (℃) time (h) active biodiesel (methyl ester) carbon steel 90 ~ 1 15460% fatty acid stainless steel140 ~160690% (1).

N, N- dihydroxyethyl dodecylamine (N, N- dihydroxyethyl dodecylamine. Amide), also known as Ninol, code name FFA, trade name detergent 650 1 or 6502, is N-SAA. Alkanolamides have many characteristics, such as no cloud point, thickening of aqueous solution, suspended dirt, strong degreasing ability, certain antistatic effect and sensitivity to electrolytes. It also has a certain anti-rust effect. This product is widely used as a formula ingredient for textiles, skin, hair and metal cleaners. It can be made into detergent, steel antirust agent, degreasing cleaning agent and fiber antistatic agent.