公开(公告)号：US5395812A

公开(公告)日：1995-03-07

申请号：US25157

申请日：1993-02-25

申请人： Shinichi Nagase ,  Hirohiko Tanabe ,  Hideki Imai

发明人： Shinichi Nagase ,  Hirohiko Tanabe ,  Hideki Imai

IPC分类号： B01J21/12 ,  B01J23/66 ,  B01J37/02 ,  C07D301/10 ,  B09J21/04 ,  B09J21/08 ,  B09J21/12 ,  B09J23/50

CPC分类号： B01J37/0215 ,  B01J23/66 ,  C07D301/10 ,  B01J21/12 ,  Y02P20/52

摘要： A catalyst for the production of ethylene oxide is disclosed which comprises an .alpha.-alumina carrier having the outer surface thereof and the surface of pores therein coated with an amorphous silica-alumina mixture having a total Si and Al content in the range of from 3.times.10.sup.-4 to 2.times.10.sup.-1 g/g of carrier and an Si/Al ratio in the range of from 0.05 to 50.0 g/g, 5 to 25% by weight based on perfected catalyst of minute metallic silver particles, and 0.0001 to 0.05 gram equivalent weight per kg of perfected catalyst of cesium. The catalyst, when used for the production of ethylene oxide by the catalytic vapor-phase oxidation of ethylene with molecular oxygen, possesses high selectivity, high activity, and high durability to ensure a long service life.

摘要翻译： 公开了一种用于生产环氧乙烷的催化剂，其包含具有其外表面的α-氧化铝载体，其中孔的表面涂覆有总Si和Al含量在3×10 -3范围内的无定形二氧化硅 - 氧化铝混合物， 4〜2×10 -1 g / g的载体，Si / Al比为0.05〜50.0g / g，5〜25重量％，基于金属银微粒的完全催化剂和0.0001〜0.05克当量 每kg完成的铯催化剂的重量。 该催化剂用于通过用分子氧催化气相氧化乙烯生产环氧乙烷时，具有高选择性，高活性和高耐久性，以确保使用寿命长。

公开(公告)号：US5077256A

公开(公告)日：1991-12-31

申请号：US467828

申请日：1990-01-19

申请人： Takeshi Yamamoto ,  Shinichi Nagase ,  Hirohiko Tanabe

发明人： Takeshi Yamamoto ,  Shinichi Nagase ,  Hirohiko Tanabe

IPC分类号： B01J23/58 ,  B01J21/12 ,  B01J23/66 ,  B01J37/02 ,  C07D301/10

CPC分类号： C07D301/10 ,  B01J23/66 ,  B01J21/12 ,  Y02P20/52

摘要： A silver catalyst for the production of ethylene oxide having 5 to 25% by weight, based on the amount of a finished catalyst, of finely divided metallic silver and 0.001 to 0.05 gram equivalent weight of cesium per kg of the finished catalyst carried on an .alpha.-alumina carrier having the outer surface thereof and the surface of pores in said carrier coated with amorphous silica, and a method for production thereof by supporting finely divided metallic silver and cesium and then subjecting the supported carrier to a high temperature heat treatment in an inert gas at a temperature of 400.degree. to 950.degree. C.