一种双子表面活性剂的合成工艺顺序的研究

Study on the synthesis process order of a gemini surfactant

以合成一种季铵盐双子表面活性剂为例,过程包括季铵化和胺酯化两步反应。调换两步反应的先后顺序,考察合成顺序对反应条件以及产率的影响。结果表明,先胺酯化后季铵化要比先季铵化后胺酯化的反应顺序耗时少得多,并且目标产物的产率要高十多个百分点。从机理方面探讨了造成不同结果的原因。

With synthesis of a quaternary ammonium gemini surfactant as an example. The process involves two steps reaction ： quaternization reaction and urethane reaction. Effect of reaction order and reaction conditions on yield were discussed by simple swap the two steps. More less time-consuming and more than 10% higher of the yield of target product in the reaction step ：first urethane reaction and then quaternization reaction. And then we discussed the reason why causing the different results from the reaction mechanism.