通过固定化离子液体在连续固定床反应器中将一氧化碳催化转化为碳酸丙烯酯。

Guo Liying, Deng Lili, Jin Xianchao, Wang Yirong, Wang Haozhi

School of Petrochemical Engineering, Shenyang University of Technology Liaoyang 111003 P. R. China

RSC Adv. 2018 Jul 25;8(47):26554-26562. doi: 10.1039/c8ra03952f. eCollection 2018 Jul 24.

In this study, functionalized composite catalysts, namely, ILs (ILX/(ZnBr)), with hydroxyl, carboxyl and amino groups immobilized on a molecular sieve (MCM-22) support were synthesized with the help of a silane coupling agent, 3-chloropropyltriethoxysilane (CPTES). Cycloaddition of CO and propylene oxide (PO) was carried out in a fixed bed reactor. The results show that MCM-22-CPTES-[AeMIM][ZnBr] demonstrates the best catalytic properties for this reaction. A high selectivity and yield of propylene carbonate (PC) could be reached at 130 °C under a CO pressure of 2.0 MPa, with a LHSV of 0.75 h and a molar ratio of CO/PO of 3 : 1. The yield stabilized at 61.6% after 50 h in the fixed bed reactor.

在本研究中，借助硅烷偶联剂3-氯丙基三乙氧基硅烷（CPTES）合成了功能化复合催化剂，即负载在分子筛（MCM-22）载体上的带有羟基、羧基和氨基的离子液体（ILX/(ZnBr)）。在固定床反应器中进行了CO与环氧丙烷（PO）的环加成反应。结果表明，MCM-22-CPTES-[AeMIM][ZnBr]对该反应表现出最佳的催化性能。在130℃、CO压力为2.0MPa、液体空速为0.75h⁻¹、CO/PO摩尔比为3∶1的条件下，碳酸丙烯酯（PC）可达到较高的选择性和产率。在固定床反应器中反应50h后，产率稳定在61.6%。