温控相分离纳米Ir催化α,β-不饱和醛、酮选择加氢  

Selective hydrogenation of α, β-unsaturated aldehydes and ketones over thermo regulated phase-separable Ir nano catalyst

作　　者：张茜 王艳华[1] ZHANG Qian;WANG Yanhua(School of Chemical Engineering,Dalian University of Technology,Dalian 116000,Liaoning,China)

机构地区：[1]大连理工大学化工学院

出　　处：《化工学报》2019年第9期3396-3403,共8页CIESC Journal

基　　金：国家自然科学基金项目(21373039)

摘　　要：将温控相分离Ir纳米催化剂用于α,β-不饱和醛、酮的选择性加氢反应中,系统考察了其催化加氢性能。在优化的反应条件下,Ir纳米催化剂对α,β-不饱和醛的C═O键加氢选择性大于99%,对α,β-不饱和酮的C═C键加氢选择性大于99%。Ir纳米催化剂经简单分离可直接循环使用5次,选择性均大于99%。TEM表征结果显示反应四次后的Ir纳米催化剂的平均粒径变为(1.9±0.2)nm,比新制备的Ir纳米催化剂的平均粒径(1.3±0.1)nm有所增大。ICP-AES测试结果表明Ir流失低于仪器检测下限(检测下限为5μg/L)。Thermo regulated phase-separable Ir nano catalyst was applied to the selective hydrogenation ofα,β-unsaturated aldehydes and ketones and its catalytic hydrogenation performance was systematically investigated.Under the optimized reaction conditions,the Ir nano catalyst exhibited high selectivity of C═O bond forα,β-unsaturated aldehydes(>99%),while high selectivity of C═C bond forα,β-unsaturatedketones(>99%).The catalyst can be simply separated and directly reused for 5 times with the selectivity remaining>99%.Furthermore,the results of TEM showed that the particle size of Ir nano catalyst after four cycles was(1.9±0.2)nm,which increased a little compared with the Ir nano catalyst newly prepared.The results of ICP-AES showed that the leaching of Ir in the upper organic phase was below the detection limit(the detection limit is 5μg/L).

关 键 词：温控相分离催化 Ir纳米催化剂 催化加氢 α β-不饱和醛 Α Β-不饱和酮 

分 类 号：O64[理学—物理化学]