Process for making high activity transition metal catalysts
US4320030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Mar 21, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2527/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A catalyst particularly useful in conversion of CO--H.sub.2 mixtures is prepared by preparing an intimate mixture of a compound containing molybdenum, vanadium and/or tungsten or a mixture of two or more of the said molybdenum, vanadium, and tungsten compounds in a melt of ammonium thiocyanate-thiourea, or a mixture of the two, heating the melt in a non-oxidizing atmosphere at temperatures sufficient to evolve gases for a time to convert the melt to a solid mass, calcining the solid in an inert atmosphere to prevent over reduction, and then passivating the catalyst, after cooling with inert gas, with a very dilute stream containing oxygen, until no further exotherm is noted. The mass may be broken up, or ground and pelletized, in process as desired for convenience in handling, and the product is desirably further heated in this fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.