Catalyst demetallization by converting the metal poisons to a sulfur containing metal compound having a defined low amount of sulfur
US4293403A · kind A · utility
Inventors
Key dates
| Filing date | Jan 3, 1977 |
| Grant date | Oct 6, 1981 |
| Priority date | — |
| Expiry date | Jan 3, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/521
- 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 sulfur-containing compound to convert at least a portion of the metals on the catalyst to a sulfur-containing metal compound. The weight % sulfur on the thus treated catalyst is controlled to about 40-90%, preferably about 40-75%, of the weight % of the total nickel, vanadium and iron on the catalyst. Preferably, the sulfur-containing compound is hydrogen sulfide in admixture with a reducing gas such as hydrogen and/or carbon monoxide. This step facilitates metal removal in subsequent processing steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.