Controlled addition of promoters to ethylene oxide catalysts (11)
US4491638A · kind A · utility
3Cited by
1References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1983 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | Aug 30, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method is disclosed for improving the selectivity of supported silver catalysts by incorporating a promoter therein. The improvement comprises forming a solution of a compound of the promoter and an anion which is not a catalyst poison and is selected from the group consisting of unsaturated carboxylic acids, aminoorganic acids, and hydroxybenzoic acids in a solvent and contacting the catalyst with the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.