Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1995-01-09
1995-08-22
Lieberman, Paul
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502348, B01J 3708, B01J 2304, B01J 2350, B01J 2366
Patent
active
054440343
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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Johnson Kenneth H.
Lieberman Paul
McGinty Douglas J.
Scientific Design Company, Inc.
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