Dispersed group VIB metal sulfide catalyst promoted with Group VIII metal
US4824821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1985 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Aug 21, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G49/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of a dispersed Group VIB metal sulfide catalyst which is promoted with a Group VIII metal for use in hydrocarbon oil hydroprocessing comprising dissolving a Group VIB metal compound, such as molybdenum oxide or tungsten oxide, with ammonia to form a water soluble compound such as aqueous ammonium molybdate or ammonium tungstate. The aqueous ammonium molybdate or ammonium tungstate is sulfided in a plurality of sulfiding steps at increasing temperatures. A compound containing a Group VIII metal is added to any sulfiding step in preference to the Group VIB metal dissolving step. The catalyst slurry and feed oil can then be passed to a hydroprocessing reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.