Activation of high selectivity ethylene oxide catalyst
US7553795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2006 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Jan 23, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/633
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention describes a process for producing a catalyst useful for the epoxidation of an olefin. More particularly, the invention pertains to a catalyst useful for the oxidation of ethylene to ethylene oxide. The catalyst comprises a solid support such as alpha-alumina, which has a catalytically effective amount of silver or a silver-containing compound, and a promoting amount of rhenium or a rhenium-containing compound, and a promoting amount of one or more alkali metals or alkali metal-containing compounds on the surface of the support. To produce a catalyst precursor. The catalyst precursor is contacted with an atmosphere comprising oxygen and steam, which atmosphere is substantially absent of an olefin, to hasten the attainment of peak selectivity in the process of oxidation of ethylene to ethylene oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.