Silver-based ethylene oxide catalyst having reduced sodium content
AssigneeScientific Design Company, Inc.
InventorsNabil Rizkalla, Andrzej Rokicki
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Abstract
A silver-based ethylene oxide catalyst that can be used in the vapor phase conversion of ethylene to ethylene oxide in the presence of oxygen is provided that includes a carrier; a catalytic effective amount of silver; and a promoting amount of at least one promoter, wherein the catalyst has a surface sodium content of 100 ppm or less.
Claims33
A silver-based ethylene oxide catalyst comprising:
- a carrier;
- a catalytic effective amount of silver;
- and
- a promoting amount of at least one promoter, wherein said catalyst has a surface sodium content of 100 ppm or less.
A method of preparing an ethylene oxide catalyst useful in the epoxidation of ethylene to ethylene oxide, comprising:
- providing a carrier;
- depositing a catalytic effective amount of silver on said carrier;
- and
- depositing a promoting amount of at least one promoter prior to, coincidentally with, or subsequent to the deposition of the catalytic effective amount of silver, wherein during at least one of said providing the carrier and said depositing the at least one promoter, sodium content on the surface and subsurface of the carrier is reduced to provide a surface sodium content of said catalyst that is 100 ppm or less.
A process for the vapor phase conversion of ethylene to ethylene oxide in the presence of oxygen, said process comprising reacting a reaction mixture comprising ethylene and oxygen in the present of a catalyst, said catalyst comprising:
- a carrier;
- a catalytic effective amount of silver;
- and
- a promoting amount of at least one promoter, wherein said catalyst has a surface sodium content of 100 ppm or less.
Dependencies are inferred from the claim text.