Silver catalyst for production of ethylene oxide, method for pro

Details Silver catalyst for production of ethylene oxide, method for pro Silver catalyst for production of ethylene oxide, method for pro

1999-02-19

2000-08-15

Trinh, Ba K.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549536, 502238, 502243, 502348, 502527, C07D30110, B09J 2104, B09J 2108

Patent

active

061039160

ABSTRACT:
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):

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patent: 4769358 (1988-09-01), Kishimoto et al.
patent: 5077256 (1991-12-01), Yamamoto et al.
patent: 5395812 (1995-03-01), Nagase et al.

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