NaA分子筛膜蒸汽渗透促进丙烯酸/乙醇的酯化反应

摘要

以对甲苯磺酸为催化剂,利用亲水性NaA分子筛膜蒸汽渗透过程,选择性地将丙烯酸和乙醇酯化反应产物中的水原位分离出反应器,打破反应平衡限制,使反应不断向右进行,反应15 h丙烯酸转化率达到100％.%Taking advantage of the hydrophilicity of zeolite A membrane, it was used as a vapor permeation membrane to remove the water generated from the esterification between acrylic acid and ethanol with the presence of p-toluene sulphonic acid as catalyst. This allowed to efficiently separate in situ formed water from the reactor, shift the esterification toward right side and hence substantially enhance the conversion of acrylic acid. Up to 100% conversion could be achieved within 15 h.