Silver catalyst for oxidn. of ethylene to ethylene oxide - by pptn. of silver on porous, heat-resistant support so concn. of silver at surface is higher than inside particles

Silberkatalysator fuer die oxidation von ethylen und verfahren zu seiner herstellung

Abstract

A silver catalyst (I) for the oxidn. of ethylene (E) to ethylene oxide (EO) is claimed, contg. 1-25 wt.% Ag on a highly-porous heat-resistant support, and produced by impregnating the support in one or more stages with an Ag-contg. soln. and precipitating the Ag on the particles; the novelty is that the concn. of Ag in the particles is non-uniform, with a markedly greater concn. at the outer (geometric) surface and in the layers adjacent to the surface than in the interior. USE/ADVANTAGE - (I) is useful for the gas-phase oxidn. of (E) with oxygen (claimed). W.r.t. prior-art catalysts, (I) has improved activity and selectivity.

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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    DE-3321895-C2April 19, 1990The Halcon Sd Group, Inc., New York, N.Y., Us
    FR-2117183-A5July 21, 1972Shell Int Research

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Cited By (1)

    Publication numberPublication dateAssigneeTitle
    DE-4010182-A1October 02, 1991Huels Chemische Werke AgSilberkatalysator fuer die oxidation von ethylen und verfahren zu seiner herstellung