Internorth, Inc.

Quantum Chemical Corporation

Paul J Busse

Douglas B Taggart

A method is disclosed for the purification of methane and/or ethane which comprises oxidizing the higher hydrocarbon impurities in gas with oxygen at 175.degree. C. to 375.degree. C. in the presence of a catalyst which contains silver as the active component.

Removal of hydrocarbon impurities from natural gas-derived methane

A method is disclosed for the purification of methane and/or ethane which comprises oxidizing acetylene and/or carbon monoxide in the gas with oxygen at 200.degree. C. to 375.degree. C. in the presence of a catalyst which contains silver as the active component.

Removal of acetylene and carbon monoxide from methane and ethane

An improved method is disclosed for improving the selectivity of supported silver catalysts by incorporating a promoter therein. The improvement comprises forming a solution of a compound of the promoter and an anion which is not a catalyst poison and is selected from the group consisting of unsaturated carboxylic acids, aminoorganic acids, and hydroxybenzoic acids in a solvent and contacting the catalyst with the solution.

Controlled addition of promoters to ethylene oxide catalysts (11)

The performance of silver-based catalyst used for the direct oxidation of ethylene to ethylene oxide is improved by regeneration in which from 1 to 1,000 parts per million of a regenerate is added to the catalyst in solution and the solvent is removed by drying the catalyst with a upflow of inert gas through the catalyst at ambient temperature and pressure.

Upflow drying of regenerated ethylene oxide catalysts

An improved method is disclosed for improving the selectivity of supported silver catalysts by incorporating a promoter therein. The improvement comprises forming a solution of a compound of the promoter and an anion selected from the group consisting of unsaturated carboxylic acids, aminoorganic acids, and hydroxybenzoic acids in a solvent and contacting the catalyst with the solution.

Controlled addition of promoters to ethylene oxide catalysts

A composition and method for removing alkali metal-containing impurities from supported silver catalysts wherein the composition is comprised of an inert organic liquid and a solubilizing agent. The method is used prior to regeneration of the catalyst with cesium, rubidium, or mixtures thereof to improve the selectivity of the regenerated catalyst.

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Omaha, NE, United States of America

Paul J Busse