Ru-Rh/AC催化对苯二酚选择性加氢制备1,4-环己二醇  

Selective Hydrogenation of Hydroquinone to 1,4-Cyclohexanediol over Ru-Rh/AC Catalyst

作　　者：孙亮[1] 荣泽明[1] 张文君[1] 吕金昆[1] 杜文强[1] 王越[1] 

机构地区：[1]大连理工大学化工与环境生命学部精细化工国家重点实验室,辽宁大连116024

出　　处：《石油化工》2013年第2期146-151,共6页Petrochemical Technology

基　　金：国家自然科学青年基金项目(21206015)

摘　　要：采用浸渍法制备了负载在活性炭(AC)上的Ru-Rh/AC双金属催化剂,通过ICP-AES,TEM,XRD方法对Ru-Rh/AC催化剂进行了表征;将Ru-Rh/AC催化剂用于对苯二酚选择性加氢制备1,4-环己二醇的反应,系统考察了溶剂、反应温度、反应压力和催化剂用量对该反应的影响。表征结果显示,活性组分在AC载体表面形成了高分散的粒径为2～5 nm的合金颗粒。实验结果表明,优化的反应条件为:以异丙醇为溶剂、催化剂中Ru-Rh金属与对苯二酚摩尔比为0.005、反应温度80℃、反应压力1.0 MPa。在此条件下反应1 h,对苯二酚转化率为100%,目的产物1,4-环己二醇的选择性为95.5%。Ru-Rh/AC双金属催化剂具有较好的稳定性。Ruthenium-rhodium/active carbon（Ru-Rh/AC） catalyst was prepared by an impregnation method, characterized by means of ICP-AES, TEM and XRD, and used in the liquid phase selective hydrogenation of hydroquinone to 1, 4-cyclohexanediol. The results showed that 2-5 nm Ru-Rh nanoparticles were dispersed well on the surface of the active carbon. The effects of solvents, catalyst dosage, reaction temperature and pressure on the activity and selectivity of the Ru-Rh/AC catalyst were investigated. Under the optimized reaction conditions： isopropanol as the solvent, n（Ru- Rh） ： n（hydroquinone） 0.005, 80 ℃, 1.0 MPa and 1 h, the selectivity to 1, 4-cycloheanediol and the conversion of hydroquinone researched 95.5% and 100%, respectively. The Ru-Rh/AC catalyst has good stability.

关 键 词：双金属催化剂 钌 铑 催化选择加氢 对苯二酚 1 4-环己二醇 

分 类 号：TQ424.22[化学工程]