Mo改性RaneyNi催化加氢制备环己基多氟苯  

Catalytic Hydrogenation for Preparation of Cyclohexyl Multifluorobenzene over Mo Modified Raney Ni Catalysts

作　　者：王庆周 王重庆[1] 陈晓蓉[1,2] 梅华[1,2] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]南京诺盟化工催化氢化工程技术研究中心,江苏南京210009

出　　处：《精细化工》2016年第12期1364-1369,共6页Fine Chemicals

摘　　要：以合金粉为原料,采用碱处理法,制备了Ni48.5Al48.5Mo3、Ni50Al50骤冷合金催化剂(RQ Ni-Mo、RQ Ni)和普通合金催化剂(Raney Ni-Mo、Raney Ni),通过ICP-AES、N2吸附脱附、XRD、H2-TPD和SEM对催化剂的物理化学性质进行了表征,将其应用于反-4-(2,3-二氟-4-甲基苯基)-4'-正丙基-1,1'-双环己基-3-烯(TF)催化加氢制备(反,反)-4-(2,3-二氟-4-甲基苯基)-4'-正丙基-1,1'-双环己烷(trans-TFT)的反应中并考察了其催化活性。结果表明:以Mo改性骤冷合金制备的RQ Ni-Mo催化剂具有较好的表观物性,比表面积为81.17 m2/g,孔容为0.12cm3/g,孔径为5.43nm、Ni晶粒尺寸为9.32 nm。在V(甲苯)=5 m L、m(RQ Ni-Mo)=0.05 g、m(TF)=0.20 g、反应温度40℃、反应压力1.5 MPa和反应时间2 h时,TF的转化率为100%,trans-TFT的选择性为69.72%。Four kinds of RQ Ni-Mo, RQ Ni, Raney Ni-Mo, and Raney Ni catalysts were prepared by the method of alkali treatment using the Ni-A1 alloy powder as raw materials. And they were characterized by ICP-AES, N2 adsorption-desorption, XRD, H2-TPD and SEM to investigate their physical and chemical properties. The catalysts were applied to the preparation of （ trans, trans ） -4- （ 2,3-difluoro-4- methylphenyl） -4 ＇-propyl-1,1 ＇-dicyclohexane （ trans-TFT ） by trans-4- （ 2,3-difluoro-4-methylphenyl ） - 4＇-propyl-1 ,l＇-dicyclohexyl-3-ene （TF） hydrogenation, and their catalytic activity was investigated. The results showed Mo-modified RQ Ni-Mo catalyst prepared by the rapidly quenched Ni-A1 alloy had better physical properties with a BET surface area of 81.17 m2/g,a pore volume of O. 12 cm3/g,a pore size of 5.43 nm, a Ni grain size of 9.32 nm. Under the optimized reaction conditions of toluene 5 mL, RQ Ni-Mo catalyst 0. 050 g, TF 0.20 g, at 40 ℃, under 1.5 MPa and for 2 h, the conversion of TF and the selectivity of trans-TFT could reach 100% and 69.72% ,respectively.

关 键 词：骤冷合金 Mo改性 RANEY Ni 加氢 环己基多氟苯 催化技术 

分 类 号：TQ426.61[化学工程]