分子筛膜反应器中环己酮与乙二醇缩合反应的合成优化与反应动力学(英文)  

Synthesis Optimization and Kinetics for Ketalization of Cyclohexanone With Ethylene Glycol in a Zeolite Membrane Reactor

作　　者：安顺永[1] 张飞[1] 桂田[1] 邱灵芳[1] 周荣飞[1] 陈祥树[1] 

机构地区：[1]江西师范大学化学化工学院江西省无机膜材料工程技术研究中心,江西南昌330022

出　　处：《石油学报（石油加工）》2014年第3期527-535,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(20906042和20966003)资助

摘　　要：考察了在T型分子筛膜反应器中H-β分子筛催化的环己酮与乙二醇缩合反应。基于二级反应建立了膜反应器动力学模型,并与实验结果进行了比较。优化了膜反应器中醇/醛摩尔比和催化剂负载量,并考察了分子筛膜和催化剂的可重复使用性。结果表明,采用膜反应器进行环己酮与乙二醇缩合反应,由于副产物水分子被膜选择性分离出反应体系,环己酮转化率由平衡转化率64.3%提高至几乎完全转化。且反应物在接近理论摩尔比条件下反应,提高了反应的原子经济性。T型分子筛膜在反应体系中具有良好的稳定性和可重复使用性。Ketalization of cyclohexanone with ethylene glycol was investigated in a pervaporation （PV） membrane reactor by using high-flux zeolite T membrane and zeolite H-~ catalyst. A kinetic model was built for the PV-aided ketalization based on the assumption of second-order reaction, and the experimental data were compared with the model predictions. The molar ratio of cyclohexanone to ethylene glycol and catalyst amount for the reaction occurring in membrane reactor were optimized, meanwhile, the reusability of zeolite T membrane and the solid catalyst in the ketalization were investigated. The conversion of cyclohexanone increased from 64. 3 % to almost completion due to water removal from the reaction system by the aid of PV process. The reaction could be carried out under the close theoretical ratios of reagents, so that the reaction atom economy was enhanced. Zeolite T membrane was stable in reaction mixture and showed a good reusability for the reaction.

关 键 词：缩酮 渗透汽化(PV) T型分子筛膜 动力学 固体酸 

分 类 号：TQ028.8[化学工程]