Synthesis method and application of quaternary ammonium salt (tetradecyl-dimethyl-benzyl ammonium chloride)

The invention relates to a synthesis method of a quaternary ammonium salt (tetradecyl-dimethyl-benzyl ammonium chloride). The method comprises the following steps: adding dimethylamine and a chlorotetradecane water solution into a quartz test tube, reacting under microwave conditions for 2 minutes, and separating through a separating funnel to obtain supernatant grease; and purifying by rotary evaporation under reduced pressure to obtain tetradecyl-dimethyl amine, adding benzyl chloride to prepare the tetradecyl-dimethyl-benzyl ammonium chloride, purifying and drying. The method reduces the organic solvent consumption, is green and environment-friendly, shortens the time and enhances the yield. The tetradecyl-dimethyl-benzyl ammonium chloride can be directly used for preparing a solution which is used for sterilization and alga removal. 季铵盐(十四烷基-二甲基-苄基氯化铵)的合成方法，包括如下步骤：二甲胺和氯代十四烷水溶液加入到石英试管中，微波条件下反应2分钟，分液漏斗分离；得到上层油状物,减压旋转蒸发提纯,得到十四烷基-二甲基胺，加入氯化苄，制备十四烷基-二甲基-苄基氯化铵，纯化干燥，本发明方法减少有机溶剂的使用，绿色环保，时间缩短，产率提高。可以以直接配制溶液，用于杀菌和除藻