Dow Technology Investments LLC

Saudi Basic Industries Corporation

Shell Internationale Research Maatschappij, B.v.

Srikant Gopal

Arun Basrur

Alan Anthony Del Paggio

Laxmi Narasimhan Chilkoor Soundararajan

Vikrant Nanasaheb Urade

Madhusudhan Rao Panchagnula

Mark McAdon

Liping L Zhang

Ernest R Frank

Albert Cheng-Yu Liu

Hirokazu Shibata

Lakshmi N Vutukuru Murthy

Balu Shivaji Uphade

Andreas Klemt

Arun G Basrur

Lakshmi N Murthy

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

A method for the epoxidation of alkylenes is provided. The method makes use of an epoxidation catalyst comprising a support, silver, manganese and greater than 35 ppm sodium. The catalyst is produced by a method comprising impregnating the support with manganese prior to impregnating the support with sodium and impregnating the support with silver prior to, at the same time as, or after impregnation with manganese. A method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers is also provided.

Epoxidation methods

A method for producing epoxidation catalysts is provided. The catalyst comprises a support, a catalytic species, maganese and at least one alkali metal and/or promoter. The catalytic species may be silver. The catalyst is prepared by a method wherein at least a portion of the manganese is impregnated in a step separate from the at least one alkali metal and/or promoter. Advantageously, catalysts produced by the present method may exhibit greater efficiencies than catalysts produced by conventional methods. A method for the epoxidation of alkylenes using the catalysts so produced is provided as is a method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers, or alka-nolamines.

Methods for producing epoxidation catalysts and epoxidation methods utilizing them

Catalyst composition comprising a zeolite and a binder, wherein the zeolite is a Ga containing zeolite and the binder is a La modified kaolin and process for converting lower alkanes to aromatic hydrocarbons, using said catalyst composition. Preferably the aromatic hydrocarbons consist of at least 45 wt % of benzene, toluene and xylenes.

Zeolite-binder catalyst composition

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Srikant Gopal