CIESC Journal ›› 2019, Vol. 70 ›› Issue (9): 3396-3403.DOI: 10.11949/0438-1157.20190486

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

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

Qian ZHANG(),Yanhua WANG()   

  1. School of Chemical Engineering, Dalian University of Technology, Dalian 116000, Liaoning, China
  • Received:2019-05-08 Revised:2019-06-07 Online:2019-09-05 Published:2019-09-05
  • Contact: Yanhua WANG

温控相分离纳米Ir催化αβ-不饱和醛、酮选择加氢

张茜(),王艳华()   

  1. 大连理工大学化工学院,辽宁 大连 116000
  • 通讯作者: 王艳华
  • 作者简介:张茜(1994—),女,硕士研究生,zhangqianmmq@163.com
  • 基金资助:
    国家自然科学基金项目(21373039)

Abstract:

Thermo regulated phase-separable Ir nano catalyst was applied to the selective hydrogenation of α, 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 for α, β-unsaturated aldehydes (>99%), while high selectivity of C═C bond for α, 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 5 μg/L).

Key words: thermo regulated phase-separable catalysis, Ir nano catalyst, catalytic hydrogenation, α, β-unsaturated aldehydes, α, β-unsaturated ketones

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5 μg/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

CLC Number: