介孔分子筛K2O/SBA-15催化酯交换反应研究

摘要

The solid base catalyst K20/SBA- 15 were prepared with mesoporous molecular sieve SBA - 15 as carrier,and by supporting potassium nitrate and then calcining. The transesterification was studied for the synthesis of n - butyl acrylate from methyl acrylate and n - butanol catalyzed by K2O/SBA - 15. The results showed that when K2O loading was 2％ (mass fraction) ,reaction time was 6 h,reaction temperature was 180 ℃, n ( n - butanol ) ( methyl acrylate) was 4 and the mass ratio of catalyst to raw material was 0.1, the best conversion of methyl acrylate could reach 64.22％.%以介孔分子筛SBA-15为载体,负载KNO3后经过焙烧,制得K2O/SBA-15固体碱催化剂.对K2O/SBA-15催化丙烯酸甲酯与正丁醇合成丙烯酸正丁酯的酯交换反应进行了研究.结果表明,当K2O负载量为2%,反应时间为6 h,反应温度为180℃,n(正丁醇)(丙烯酸甲酯)为4,m(催化剂)/m(原料)为0.1时,丙烯酸甲酯的转化率最大,为64.22%.