阳离子交换树脂催化合成丙烯酸环己酯

Synthesis of cyclohexyl acrylate with cation exchange resin as catalyst

以丙烯酸和环己烯为原料,磺酸基苯乙烯系强酸性阳离子交换树脂为催化剂合成丙烯酸环己酯,考察了反应温度、催化剂用量、烯酸摩尔比、反应时间对酯化反应的影响。结果表明,合成丙烯酸环己酯的最佳条件为:反应温度85℃,催化剂质量分数5%,n(酸)∶n(烯)=2∶1,反应时间5 h。在最佳工艺条件下,环己烯转化率为87.2%,丙烯酸环己酯选择性90.1%,二聚物选择性8.7%。

Cyclohexyl acrylate is synthesized by the addition esterification of acrylic acid and cyclohexane with macroporous polystyrene sulfonate cation exchange resin as catalyst. The effects of reaction temperature, amount of catalysts, molar ratio of acid to alkene and reaction time on the conversion and selectivity are investigated. The results show that the optimum conditions are shown as follows ：85 ℃ of the reaction temperature ,5% of the catalyst amount,2：1 of the ratio of acid to alkene and 5 hours of reaction time. Under the optimal reaction condition, the conversion of cyclohexene reaches 87.2%. The selectivity of cyclohexyl acrylate and dimer is 90. 1% and 8.7% , respectively.