一种对苯二甲酸二甲酯的制备方法
本发明公开了一种对苯二甲酸二甲酯的制备方法,包括以下步骤:以对苯二甲酸和甲醇为原料,在咪唑型离子液体催化剂和助溶剂存在下进行酯化反应、初级分离和多级提纯,得到对苯二甲酸二甲酯,所述多级提纯包括:减压精馏、重结晶及干燥。本发明提供一种对苯二甲酸二甲酯的制备方法,通过采用咪唑型离子液体作为催化剂,优化反应工艺参数,具有工艺简单、催化效率高、选择性高、催化剂循环稳定性能高且产品纯度高的特点。
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