The synthetic processes of phthalic anhydride diglycol ester using sulfuric acid and methyl benzene sulfonic acid as catalysts,respectively,were investigated.

• 讨论了邻苯二甲酸酐一缩二乙二醇酯的合成工艺,分别以硫酸和对甲基苯磺酸为催化剂合成邻苯二甲酸酐一缩二乙二醇酯。