Supported silver catalyst, and processes for making and using same
First Claim
1. A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkene with an oxygen containing gas comprising:
- contacting a silver-containing catalyst support with a solution comprising a solvent and at least one metal-containng promoter other than alkali metals or alkaline earth metals at conditions sufficient to associate the desired amount of said metal-containing promoter with said silver-containing catalyst support to enhance the performance of said supported silver catalyst, wherein said solvent does not coordination couple with said metal-containing promoter and said metal-containing promoter in said solution has an increased affinity to said silver-containing catalyst support relative to the affinity of said metal-containing promoter in a similar solution to a similar catalyst support without silver.
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Abstract
A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkylene with an oxygen-containing gas is disclosed and comprises contacting a silver-contacting support with a solution comprising a metal-containing promoter other than alkali metals or alkaline earth metals. The solution is chosen so that the metal-containing promoter has an increased affinity to the silver-containing carrier relative to its affinity to the carrier without silver. Alkene epoxidation catalysts and alkene epoxidation processes are also disclosed.
93 Citations
49 Claims
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1. A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkene with an oxygen containing gas comprising:
contacting a silver-containing catalyst support with a solution comprising a solvent and at least one metal-containng promoter other than alkali metals or alkaline earth metals at conditions sufficient to associate the desired amount of said metal-containing promoter with said silver-containing catalyst support to enhance the performance of said supported silver catalyst, wherein said solvent does not coordination couple with said metal-containing promoter and said metal-containing promoter in said solution has an increased affinity to said silver-containing catalyst support relative to the affinity of said metal-containing promoter in a similar solution to a similar catalyst support without silver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 34, 35, 36, 37, 38, 39)
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16. A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkene with an oxygen-containing gas comprising:
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(a) impregnating a catalyst support with a solution comprising a solvent or a solubilizing agent, and silver salt in an amount sufficient to deposit the desired amount of silver on said catalyst support; (b) treating said impregnated catalyst support produced in step (a) to convert at least a fraction of the silver salt to silver metal and effect deposition of silver on a portion of the surface of said catalyst support; (c) contacting said catalyst support treated in step (b) with a solution comprising a solvent and at least one metal-containing promoter other than alkali metals or alkaline earth metals at - View Dependent Claims (17, 18, 19, 20, 21, 22, 40, 41, 42, 43)
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23. A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkene with an oxygen-containing gas comprising:
contacting a silver-containing support with a solution comprising a solvent and at least one metal-containing promoter other than alkali metals or alkaline earth metals at conditions sufficient to associate the desired amount of said metal-containing promoter with said catalyst support to enhance the performance of said supported silver catalyst, wherein said solvent does not coordination couple with said metal-containing promoter and is chosen so that said metal-containing promoter is associated with said catalyst support at an increased rate relative to the rate at which said metal-containing promoter is associated with a similar catalyst support without silver in a similar solution. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 44, 45, 46, 47, 48, 49)
Specification