脂肪烷基三甲基草酸铵的合成和优化

Synthesis and Optimization of Fatty Alkyl Trimethyl Ammonium Oxalates

摘要:

以脂肪烷基二甲基叔胺和碳酸二甲酯(DMC)为原料，制备了脂肪烷基三甲基碳酸甲酯铵，再将其与草酸反应得到脂肪烷基三甲基草酸铵，并通过1HNMR对产物结构进行了确认。以合成十六烷基三甲基草酸铵为例，对合成工艺进行了优化。结果表明: 在碳酸二甲酯中150 ℃反应3h，叔胺质量浓度控制在0.05 kg/L，四种季铵盐产率都能达85%以上。

Abstract:

The fatty alkyl trimethyl ammonium oxalate was synthesized with Oxalic acid andalkyltrimethylammonium methylcarbonate, which was prepared by the reaction of alkyl tertiary amine and dimethyl carbonate (DMC). Take tetradecyltrimethylammonium oxalate as an example, the influences of reaction regents, reaction temperature, reaction time, the concentration of alkyl tertiary amine were investigated. And the optimized conditions were reaction at 150 ℃ in DMC for 3 h, the concentration ofalkyl tertiary amine 0.05 g/mL. Under the optimized conditions, the productivity could reach 85%. The structure of the products were characterized by means of 1HNMR, and the results showed that fatty alkyl trimethyl ammonium oxalates were synthesized successfully.