Catalyst demetallization utilizing a combination of reductive and oxidative washes
US4101444A · kind A · utility
15Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/516
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the steps of contacting the catalyst with both a reductive wash and a subsequent oxidative wash to remove at least a portion of the metal poisons from the catalyst. A preferred oxidative wash medium comprises an aqueous solution of hydrogen peroxide. The vanadium and nickel metals may be recovered from the resultant used wash solutions for possible metallurgical use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.