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Selective synthesis of cumene from benzene and acetone: Design of tandem catalyst with hydrogenating and alkylating functions
Microporous and Mesoporous Materials ( IF 4.8 ) Pub Date : 2023-09-01 , DOI: 10.1016/j.micromeso.2023.112799
Olga V. Shutkina , Olga A. Ponomareva , Irina I. Ivanova

Benzene hydroalkylation with acetone has been studied over tandem catalytic systems containing copper and zeolite components. The kinetic study in the wide range of acetone conversions allowed to determine the main reaction pathways leading to the target hydroalkylation products, cumene and diisopropylbenzenes, and to the by-products of acetone condensation. To prevent the side reaction pathways and to achieve high selectively towards target products, three strategies for assembling metal and zeolite components in the catalytic system were used: i) metal encapsulation in zeolite pores; ii) mortar mixing of copper supported on silica with zeolite component; iii) dual-bed layered arrangement of Cu/SiO2 and zeolite components. The best catalytic performance was achieved over dual-bed layered catalytic system, containing Cu/SiO2 in the upper layer and zeolite BEA in the bottom layer, which showed the highest yield of hydroalkylation products (93wt%) and stable catalyst operation.



中文翻译:

苯和丙酮选择性合成枯烯:具有加氢和烷基化功能的串联催化剂设计

已经在含有铜和沸石组分的串联催化体系上研究了丙酮与苯的加氢烷基化对各种丙酮转化的动力学研究可以确定产生目标加氢烷基化产物异丙苯和二异丙苯以及丙酮缩合副产物的主要反应途径为了防止副反应途径并实现对目标产物的高选择性,使用了三种在催化体系中组装金属和沸石组分的策略:i)金属封装在沸石孔中;ii)将二氧化硅负载的铜与沸石组分进行灰浆混合;iii) Cu/SiO 2双床层状排列和沸石成分。上层为Cu/SiO 2、下层为BEA沸石的双床层状催化体系获得了最佳的催化性能,显示出最高的加氢烷基化产物收率(93wt%)和稳定的催化剂运行。

更新日期:2023-09-01
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