Dow Technology Investments LLC

Paul Victor Hinman

Hwaili Soo

Albert C Liu

Michael Habenschuss

Ravindra Tupe

Liping L Zhang

Ailene Gardner Phillips

Arun Basrur

Ravindra R Tupe

Liping Zhang

Ravindra Radhakisan Tupe

Arun G Basrur

Albert Liu

A method of producing an alkylene oxide includes passing a reaction mixture comprising alkylene, oxygen and a gaseous chlorine-containing promoter species over a supported catalyst containing silver and a promoting amount of rhenium to undergo an epoxidation reaction at a first operating condition. The method further includes subsequently performing the epoxidation reaction at a preferred operating condition. The preferred operating condition is characterized by an efficiency of the epoxidation reaction toward the alkylene oxide where the efficiency is lower than that of a maximum efficiency achievable at an operating temperature corresponding to the preferred operating condition.

Epoxidation reactions and operating conditions thereof

A method for starting-up a high efficiency alkylene oxide catalyst is described. A feed gas comprising an alkylene, oxygen, and at least one organic chloride is introduced to the catalyst. The molar ratio of oxygen to alkylene, reaction temperature, and overall chloriding effectiveness are adjusted to specified ranges of values within a specified catalyst aging period.

Method of starting-up a process of producing an alkylene oxide using a high-efficiency catalyst

The present invention relates to methods for qualifying material for using in the cleaning of alkylene oxide equipment. Qualified material is not expected to contribute to the formation of determinable amounts of alkylene oxide by-products. Methods of cleaning alkylene oxide equipment, and alkylene oxide processes incorporating these methods are also provided.

Method of qualifying material for use in cleaning of alkylene oxide equipment

A process for conditioning a high efficiency silver catalyst used to manufacture ethylene oxide from ethylene, oxygen, and at least one organic chloride is described. A non-reactive conditioning gas comprising at least one of ethylene, oxygen, and a ballast gas is introduced to the catalyst at a conditioning temperature ranging from 150&#xb0; C. to 180&#xb0; C. for a selected period of at least 4 hours.

Process for conditioning a high efficiency ethylene oxide catalyst

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Charleston, WV, United States of America

Paul Victor Hinman