Process for operating the epoxidation of ethylene
US6717001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the vapor phase oxidation of ethylene to ethylene oxide, which process involves reacting a reaction mixture having ethylene and oxygen in the presence of a supported highly selective silver-based catalyst by: operating at an initial operation phase wherein fresh catalyst is used, and operating at a further operation phase when a cumulative ethylene oxide production exceeds 0.01 kT ethylene oxide per m3 of catalyst, wherein in said further operation phase the concentration of ethylene in the reaction mixture is increased; anda method of using ethylene oxide into the 1.2-ethanediol or the 1,2-ethanediol ether wherein the ethylene oxide has been obtained by the process for the production of ethylene oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.