Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1994-04-04
1994-12-20
Evans, Joseph E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
502347, 502348, C07D30110, C07D30304, B01J 2348
Patent
active
053747488
ABSTRACT:
An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of an acid; subjecting the impregnated support to a multi-stage activation in an atmosphere containing less oxygen than air by heating at a first temperature in the range of 150.degree. to 200.degree. C. for less than an hour, heating at a second temperature in the range of from greater than 200.degree. C. to 300.degree. C. for less than one hour, heating at a third temperature in the range of from greater than 300.degree. C. to 400.degree. C. for less than one hour and finally heating at a fourth temperature in the range of from greater than 400.degree. C. to 500.degree. C.; and post impregnating the support with an alkali metal, preferably cesium, from an anhydrous alcohol solution followed by washing with alcohol solvent and rapid drying to produce a finished catalyst having from 1-6.times.10.sup.-3 gew of the alkali metal per kg of catalyst.
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Evans Joseph E.
Johnson Kenneth H.
Scientific Design Company, Inc.
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