Nippon Shokubai Kagaku Kogyo Co., Ltd.

Nippon Shokubai Kagaku Kogyo

Isamu Kiguchi

Toshihiko Kumazawa

Masashi Mitsuhata

Masayuki Sawada

Yukihiko Kakimoto

Yoshiaki Kajimoto

In the purification of ethylene oxide from an ethylene oxide-containing reaction formation gas produced by catalytic gas-phase oxidation of ethylene with a molecular oxygen containing gas, external thermal energy required for heating an ethylene oxide refiner is economized by a method which utilizes the diffusate obtained from the top of an ethylene oxide stripper as a heat source for the refiner. Further, the bottom liquid of the stripper can be used as a heat source for ethylene oxide refiner and/or a light ends stripper.

Method for purification of ethylene oxide and recovery of heat thereof

An improved process for preparing a silver-supported catalyst for use in the production of ethylene oxide by catalytic vapor phase oxidation of ethylene with molecular oxygen, which comprises impregnating a porous inorganic carrier with a solution of a silver compound containing a reducing compound, subjecting the impregnated product to a reducing treatment at 50.degree. to 200.degree. C. to disperse and deposit metallic silver on the external surface of the carrier and the internal surfaces of its pores, washing the silver-supported carrier with water, a lower alcohol or both, drying the washed product at a temperature of 50.degree. to 150.degree. C., impregnating the dried product with a solution containing a promoter, and evaporating the liquid ingredients.

Process for preparing silver-supported catalyst for the production of

A process for preparing ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen in the presence of a catalytic composition whose constituent metallic elements and atomic ratio are represented by the general formula

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Zushi, Japan

Isamu Kiguchi