Methods for conditioning an ethylene epoxidation catalyst and associated methods for the production of ethylene oxide
US11801493B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Nov 29, 2017 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Feb 28, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods for conditioning an ethylene epoxidation catalyst are provided. The conditioning methods comprise contacting an ethylene epoxidation catalyst comprising a carrier, having silver and a rhenium promoter deposited thereon, with a conditioning feed gas comprising oxygen for a period of time of at least 2 hours at a temperature that is above 180° C. and at most 250° C., wherein the contacting of the ethylene epoxidation catalyst with the conditioning feed gas occurs in an epoxidation reactor and in the absence of ethylene. Associated methods for the epoxidation of ethylene are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.