【摘要】 以丙三醇、冰醋酸为原料,活性炭负载对甲苯磺酸为催化剂,催化合成三醋酸甘油酯。考察了催化剂中w(对甲苯磺酸)、催化剂用量、醇酸比、酯化时间等因素对反应的影响。发现上述因素均对三醋酸甘油酯的收率有显著影响,且都存在较优值。催化剂在该反应中有良好的催化活性。优选的反应条件是:催化剂中w(对甲苯磺酸)为36%,w(催化剂)为1.8%,n(丙三醇)∶n(冰醋酸)=1∶4,酯化时间为4 h。在此条件下,三醋酸甘油酯收率可达92%。更多还原

【Abstract】 Using p-toluensulphonic acid supported by activated carbon as catalyst,glycerol triacetate was synthesized from glacial acetic acid and glycerin.The optimum conditions of the reaction were determined as following: molar ratio of glycerin to glacial acetic acid is 1∶4;the mass of catalyst to total is 1.8%;esterification time is 4 h;w(p-toluensulphonic acid)is 36%.The results show that the yield is over 92%.更多还原