1. 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、羟甲基化缩合反应制得氨基酸类咪唑啉型两性表面活性剂。
2. 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.
   不同的物质具有非常小的,然而又是差异较大的自递常数。因此,这种两性溶剂在滴定分析中找到了更为广阔的应用领域。

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