Catalyst and process for oxidation of ethylene to ethylene...

Details Catalyst and process for oxidation of ethylene to ethylene... Catalyst and process for oxidation of ethylene to ethylene...

B - Operations, Transporting

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B01J 23/66 (2006.01) B01J 35/02 (2006.01) B01J 35/10 (2006.01) C07D 301/10 (2006.01) B01J 37/02 (2006.01)

Patent

CA 1212935

TITLE CATALYST AND PROCESS FOR OXIDATION OF ETHYLENE TO ETHYLENE OXIDE INVENTOR WILLIAM D. ARMSTRONG ABSTRACT OF THE DISCLOSURE A supported silver catalyst for the oxidation of ethylene with molecular oxygen to ethylene oxide is made by depositing silver on a support capable of selectively adsorbing alkali metals, activating the silver under conditions chosen to provide the optimum selectivity to ethylene oxide and thereafter deposit- ing an amount of an alkali metal sufficient to increase selectivi- ty of the silver catalyst above its alkali-free state. The catalyst most preferably employs a ceramic support having a surface area of 0.3-0.8 m2/gm. The amount of alkali metal on the finished catalyst is most preferably 50-300 ppm by weight. The catalyst may also include additional promoters, such as the alkaline earth metals, preferably barium.

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