NaBH_4还原制备Ru-[bmim]BF_4及催化苯选择加氢反应性能  

Preparation of Ru-[bmim]BF_4 Catalyst Using NaBH_4 as Reducing Agent and Its Performance in Selective Hydrogenation of Benzene

作　　者：薛伟[1] 秦燕飞[1] 李芳[1] 王延吉[1] 王志苗[1] 

机构地区：[1]河北工业大学化工学院,绿色化工与高效节能河北省重点实验室,天津300130

出　　处：《催化学报》2012年第12期1913-1918,共6页

基　　金：973计划前期研究专项(2010CB234602);国家自然科学基金(21176056;21106031);河北省自然科学基金(B2010000023)~~

摘　　要：在离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)-水混合介质中,以NaBH4为还原剂制备了Ru-[bmim]BF4催化剂,并用于苯选择加氢反应.结果表明,相对于N2H4·H2O还原制备的催化剂,本催化剂具有明显较高的环己烯选择性,当苯转化率为49.5%时,环己烯选择性可达34.1%,这是由于硼的作用所致.重复使用时,由于离子液体的流失,暴露的Ru活性中心增多,因而苯转化率升高,但环己烯选择性下降,同时生成了ZnOHF.这是离子液体中F–与ZnSO4反应而得;并且在离子液体的模板作用下,ZnOHF沿着(001)方向生长,从而形成了一维棒状形貌.A Ru-[bmim]BF4 catalyst was prepared in a mixture of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate（[bmim]BF4） and H2O using NaBH4 as a reducing agent. The Ru-[bmim]BF4 catalyst showed higher selectivity for cyclohexene than a catalyst reduced by N2H4·H2O because of the influence of boron. When Ru-[bmim]BF4 was reused, higher activity and lower selectivity were obtained because the number of Ru active sites increased through leaching of the ionic liquid. The used catalyst also contained ZnOHF formed in the reaction between F–and ZnSO4, which was an additive in the reaction. Under the influence of the ionic liquid as a template, ZnOHF grew along the （001） direction and exhibited rod-like morphology.

关 键 词：钌 1-丁基-3-甲基咪唑四氟硼酸盐 硼氢化钠 羟基氟化锌 苯 选择加氢 

分 类 号：TQ203.2[化学工程—有机化工]