Process for reactivating used silver ethylene oxide catalysts
US4125480A · kind A · utility
32Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Oct 18, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The performance of used supported silver-based ethylene oxide catalysts is improved by a) washing the used catalyst with water or a mixture of water with a water-miscible organic solvent and b) depositing on the washed catalyst from about 0.00004 to about 0.008 gram equivalent weights per kilogram of total catalyst of ions of one or more of the alkali metals sodium, potassium, rubidium or cesium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.