酯交换法合成碳酸二甲酯研究

Study on the Synthesis of Dimethyl Carbonate by Transesterification

通过酯交换法,以甲醇和碳酸丙烯酯(PC)为原料,反应精馏合成碳酸二甲酯。筛选出最佳催化剂,确定了其用量,考察了原料配比等对反应转化率的影响。研究结果表明,催化剂CHS-1和CHS-2催化效果较好,其较佳用量为0.4％～0.5％(相对于甲醇的质量),甲醇与PC的质量比为8～10,反应停留时间为40min～60min。本文报道的酯交换工艺具有一定的工业应用价值。

Dimethyl Carbonate has been synthesized by transesterification of methanol with propylene carbonate using CHS-1 or CHS-2 as a catalyst. The effect of catalyst amount on transesterification has been studied. The experimental results have shown that :the amount of catalyst is 0. 4%-0. 5%,weight ratio of methanol to propylene carbonate is 8-10,reaction time is 40 minutes-60 minutes. The process of transesterification by reactive distillation is of value in industrial production.