Dow Technology Investments LLC

Union Carbide Chemicals & Plastics Technology Corporation

Albert Cheng-Yu Liu

Mark McAdon

Liping L Zhang

Arun Basrur

Juliana G Serafin

Srikant Gopal

Ernest R Frank

Seyed R Seyedmonir

Hirokazu Shibata

Thomas Szymanski

Hwaili Soo

Erlind M Thorsteinson

David Michael Minahan

James Herndon McCain

Liping Zhang

Madan Mohan Bhasin

Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.

Method of formulating alkylene oxide catalyst in relation to catalyst reference properties

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

Albert Cheng-Yu Liu