酯交换法生产碳酸二甲酯工艺节能研究

以甲醇钠为催化剂,碳酸丙烯酯和甲醇为原料酯交换生产碳酸二甲酯.在传统工艺基础上对浮阀塔塔盘进行了改造,在新型反应精馏塔上进行了中试并考察了塔盘液位高度、回流比等因素对塔顶产品纯度的影响.结果表明,随着回流比增大,塔顶碳酸二甲酯含量开始增加并逐渐趋向稳定；随着塔盘液位高度增加,塔顶碳酸二甲酯含量增加并逐渐稳定；塔顶丙二醇...

Energy-Saving Based on the Process for Transesterification Synthesis of Dimethyl Carbonate

Dimethyl carbonate(DMC) was prepared by transesterification of propylene carbonate and methanol with sodium methoxide as catalyst.Based on the traditional process,transformation of floate valve tray was made.The pilot test was carried on the novel reactive distillation column.Effects of tray liquid height,reflux ratio on the product purity were studied.The result shows that the dimethyl carbonate content improved and became stable with the reflux ratio increased;with the tray liquid height increases,the dim...