Cracking catalysts passivated by tungsten
US4290919A · kind A · utility
10Cited by
12References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Jul 23, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Metals such as nickel, vanadium and iron contaminating a cracking catalyst are passivated by contacting the cracking catalyst under elevated temperature conditions with tungsten and compounds of tungsten.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.