公开(公告)号：US5126497A

公开(公告)日：1992-06-30

申请号：US718695

申请日：1991-06-21

申请人： Ronald F. Spohn ,  Raymond T. Olczak

发明人： Ronald F. Spohn ,  Raymond T. Olczak

IPC分类号： C07C17/00

CPC分类号： C07C17/35

摘要： A partially deactivated reduction catalyst is prepared by reacting palladium on alumina catalyst with benzotrifluoride in an amount of 0.1 to 10.0 millimoles of benzotrifluoride per gram of alumina and hydrogen in an amount ranging from 10 to 2000 moles of hydrogen per mole of benzotrifluoride at a temperature of 200.degree. C. to 300.degree. C. for 30 minutes to 2 hours. The catalyst is useful for the reduction of trifluoromethylbenzonitriles and trifluoromethylbenzylamines to produce the corresponding trifluoromethyltoluenes in high yields. The catalyst is also useful in other hydrogen reduction reactions, e.g., for conversion of o-chlorobenzonitrile, o-chlorobenzylamine and mandelonitrile to toluene and for conversion of phenethylamine to ethylbenzene.

摘要翻译： 部分失活的还原催化剂是通过使钯/氧化铝催化剂与每摩尔氧化铝为0.1至10.0毫摩尔的三氟甲苯的量和每摩尔三氟甲苯的10至2000摩尔氢的量反应制备的，温度为 在200℃至300℃下搅拌30分钟至2小时。 催化剂可用于还原三氟甲基苯腈和三氟甲基苄胺以高产率生成相应的三氟甲基甲苯。 催化剂也可用于其它氢还原反应，例如用于将邻氯苄腈，邻氯苄胺和扁桃腈转化成甲苯，以及将苯乙胺转化为乙苯。