阳离子交换树脂催化合成乙酸环己酯

以磺化苯乙烯阳离子交换树脂为催化剂,催化环己烯和乙酸反应合成乙酸环己酯,考察了反应温度、反应时间、催化剂用量和原料配比对反应的影响。结果表明,较适宜的反应条件为:环己烯用量为0.1 mol,酸烯摩尔比为4:1,催化剂用量为0.96 g,反应温度为90℃,反应时间为5 h。在此条件下酯收率为83.2%,催化剂使用5次仍保持较高活性。

Synthesis of cyclohexyl acetate by catalytic action of cation exchange resin

Cyclohexyl acetate was synthesized by cyclohexene and acetic acid as starting materials with polystyrene sulfonate cation exchange resin as catalyst.Effects of reaction temperature,reaction time,dosage of catalyst and molar ratio of acetic acid to cyclohexene on the reaction yield were investigated.Results showed that the optimum conditions were identified as follows:amount of cyclohexene 0.1 mol,molar ratio of acetic acid to cyclohexene 4∶ 1,dosage of catalyst 0.96 g,reaction temperature 90 ℃,reaction time 5 h.Under these conditions,the yield of cyclohexyl acetate reaches 83.2%.The catalyst can be used for 5 times without significant yield declining.