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：US6103916A

公开(公告)日：2000-08-15

申请号：US256338

申请日：1999-02-19

申请人： Hitoshi Takada ,  Masahide Shima

发明人： Hitoshi Takada ,  Masahide Shima

IPC分类号： B01J21/04 ,  B01J23/50 ,  B01J35/00 ,  B01J37/02 ,  B01J37/06 ,  C07D301/10 ,  B09J21/04 ,  B09J21/08

CPC分类号： B01J37/0207 ,  B01J23/50 ,  B01J21/04 ,  B01J35/1009 ,  B01J35/1066 ,  B01J35/1076 ,  B01J37/06

摘要： A silver catalyst excelling in catalytic performance and permitting production of ethylene oxide with a high selectivity for a long time, a method for the production of ethylene oxide by the use of the silver catalyst, and a method for ideal manufacture of the silver catalyst are disclosed. The silver catalyst is formed by depositing silver on a carrier having .alpha.-alumina as a main component and used for the production of ethylene oxide, which carrier of the silver catalyst has undergone the following treatment capable of yielding a wash exhibiting a resistivity index of not less than 10,000 .OMEGA..multidot.cm (25.degree. C.):(Method of treatment)In a conical beaker having an inner volume of 500 ml, 300 ml of the carrier is placed, dried therein at 120.degree. C. for two hours, and boiled in conjunction with (water absorption +220) ml of pure water added thereto under normal pressure at 90.degree. C. for 30 minutes, providing that the term "water absorption" as used herein refers to what is expressed by the following formula (1):Water absorption=[300 (ml).times.packing specific gravity (g/ml).times.water absorption (wt. %)]/[Specific gravity of water (g/ml)](1)

摘要翻译： 公开了一种催化性能优异的催化剂催化剂，可长期高选择性地制备环氧乙烷的银催化剂，通过使用银催化剂生产环氧乙烷的方法以及银催化剂的理想制造方法 。 银催化剂通过在具有α-氧化铝作为主要成分的载体上沉积银而形成，并用于制备环氧乙烷，该银催化剂的载体经历了能够产生电阻率指数不为 小于10,000欧米伽xcm（25℃）:(处理方法）在内容积为500ml的圆锥形烧杯中放置300ml载体，在120℃下干燥2小时，煮沸 在常压下在90℃下加入（吸水+220）ml纯水30分钟，条件是本文所用的术语“吸水”是指由下式（1）表示的含义， ：吸水率= [300（ml）包装比重（g / ml）×吸水率（重量％）] / [比重（g / ml）]（1）