Catalyst demetallization with a reductive SO.sub.2 wash
US4243550A · kind A · utility
12Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Jan 6, 1981 |
| 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 step of contacting the catalyst with a reductive wash medium comprising an aqueous, preferably saturated, solution of SO.sub.2 to remove at least a portion of the metal poisons. The vanadium and nickel metals may be recovered from the resultant used wash solution for possible metallurgical use. The SO.sub.2 reductively washed catalyst may also be subjected to a subsequent oxidative wash such as hydrogen peroxide wash prior to its return to the hydrocarbon conversion process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.