The amino-acid imidazoline amphoteric surfactant was prepared from dichloroethane and vegetable-oil fatty acid as raw materials by aminolysis, esterffication and hydroxymethylation.

以二氯乙烷与植物油脂肪酸等为原料,通过氨解、酯化、羟甲基化缩合得氨基酸类咪唑啉型两表面活剂。

Various substance has very small autoprotolysis constants which,however,has more large difference,so that the amphoteric solvents are found more wide application in titrimetric analysis.

不同的物质有常小的,然而又是差异较大的自递常数。因此,这种两溶剂在滴定分析中找到了更为广阔的用领域。