N,N-二烯丙基-二甲基氯化铵的合成

Synthesis of Diallyl Dimethyl Ammonium Chloride

研究了以烯丙基氯、二甲基胺和氢氧化钠为原料，合成二烯丙基－二甲基氯化铵的合成工艺，提出了在反应温度为５℃、１０℃和１５℃下，烯丙基氯和氢氧化钠的累积体积分数加量分别为２５％、５５％及９０％的分段式升温交替滴加新方法，可使叔胺化反应时间缩短至２ｈ。在总物质的量比为：烯丙基氯∶二甲基胺∶氢氧化钠为２．１０～２．１５∶１．０∶１．０，反应温度：４５℃下，６～７ｈ可完成季胺化反应。此工艺已在工业试验中得到验证。得到ＤＡＤＭＡＣ≥９２％、ＮａＣｌ≤３％收率为９５％的工业产品。

? In this paper a new method of alternate feeding under stage heating has been studied and used in synthesis of ally dimethyl amine,starting from ally chloride,dimethyl amine and sodium hydroxideThe optimum conditions of quaternisation are as follows:mole ratio of ally chloride∶dimetyl amine∶sodium hydroxide=210～215∶10∶10,reaction temperature∶45℃,reaction time:6～7 hAfter separation and purification,the purity of the product reaches DADMAC≥92% and NaCl≤3% with a yield of 92%Now this technique has been used in the industrial production of DADMAC