Union Carbide Chemicals & Plastics Technology Corporation

Dow Technology Investments LLC

James Herndon McCain

John Francis Szul

Hwaili Soo

Erlind M Thorsteinson

Harvey E Andresen

Kent Newman

David Michael Minahan

Phillip R Fairchild

Floyd L Pfeffer

Albert Cheng-Yu Liu

Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section.

Alkylene oxide purification systems

Catalysts for the production of alkylene oxide by the epoxidation of alkene with oxygen comprise a silver-containing support, and a sufficient amount of cobalt component to enhance at least one of activity and/or efficiency and/or stability as compared to a similar catalyst which does not contain cobalt component.

Alkylene oxide catalysts having enhanced activity and/or stability

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Charleston, WV, United States of America

James Herndon McCain