Abstract

The surface activity of fatty amide surfactants synthesized under three different conditions are presented. Three reaction conditions, involving transesterification and amidation reactions, were performed. In the first condition, both reactions were conducted under environmental conditions. In the second, transesterification was conducted under supercritical conditions. For the third condition, both reactions took place under supercritical conditions. The transesterification reaction was performed in a preheated batch reactor at 523.15–623.15 K, a pressure of 8–25 MPa, and with a palm oil/methanol ratio of 1:4 v/v, adding supercritical CO₂ as a reaction solvent. The amidation reaction was performed in the same reactor as that used for the transesterification at a temperature range of 523.15–623.15 K, a pressure of >8 MPa, and a stoichiometric oil/methanol ratio with 0.072 kg of diethanolamine.

摘要

介绍了在三种不同条件下合成的脂肪酰胺表面活性剂的表面活性。进行了三种反应条件，包括酯交​​换反应和酰胺化反应。在第一个条件下，两个反应都在环境条件下进行。第二，酯交换反应在超临界条件下进行。对于第三个条件，两个反应都在超临界条件下发生。酯交换反应在预热的间歇式反应器中进行，温度为 523.15–623.15 K，压力为 8–25 MPa，棕榈油/甲醇比例为 1:4 v/v，加入超临界 CO ₂作为反应溶剂。酰胺化反应在与酯交换反应相同的反应器中进行，温度范围为 523.15–623.15 K，压力 > 8 MPa，油/甲醇的化学计量比为 0.072 kg 二乙醇胺。