摘要
以环境友好性催化剂磺化聚(苯乙烯co 甲基丙烯酸丁酯)[磺化P(St co BMA)]代替传统的浓硫酸催化正丙醇与冰乙酸的酯化反应。实验结果表明,磺化P(St co BMA)对乙酸正丙酯的合成反应具有较好的催化作用。乙酸正丙酯的产率与聚合物催化剂的用量有关,当催化剂与正丙醇的质量比为1∶6、酯化反应时间为1 h时,乙酸正丙酯的产率可以达到83 6%以上,且共聚物催化剂经5次使用后仍可使乙酸正丙酯产率达到80 68%。多次使用的催化剂经再生后,其催化活性与新制备的共聚物催化剂相比几乎没有差别。
A new catalyst without pollution to environment has been synthesized by sulphonation of poly(styrene-co-butylmethacrylate) and its catalytic activity has also been examined by using esterification of acetic acid with 1-propanol. Experimental results show that sulphonated poly(styrene-co-butylmethacrylate) can be used as a catalyst to replace sulfuric acid in n-propyl acetate syntheses and the yield increases with the increasing of the catalyst dosage at beginning , and then keeps invariable when the ratio of the catalyst versus 1-propanol and reaction time is over 1∶6 and 1 h respectively. The yield of n-propyl acetate decreases from 83.64% to 80.68% after having been used for 5 times. But the catalytic activity of sulphonated poly(styrene-co-butylmethacrylate) can be resumed by washing with a diluted sulfuric acid.
出处
《化学与生物工程》
CAS
2005年第4期21-23,共3页
Chemistry & Bioengineering
基金
湖北省新型反应器与绿色化学工艺重点实验室开放基金资助(239064)
