Redispersion of noble metals on supported catalysts
US4148750A · kind A · utility
60Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Jan 10, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J38/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Noble metals on supported zeolite-containing hydrocarbon conversion catalysts, which have been at least partially damaged by thermal and/or hydrothermal stresses resulting in a maldistribution of the supported metal, are redispersed to a highly active, high surface area state by contacting said catalyst with ethylenediaminetetraacetic acid (EDTA), or a salt thereof, to the point of incipient wetness and then removing said acid by heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.