Passivation of vanadium accumulated on catalytic solid fluidizable particles
US4515683A · kind A · utility
32Cited by
15References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 15, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Sep 15, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Passivation of vanadium accumulated on catalyst, e.g. crystalline zeolite hydrocarbon conversion catalyst in the rare earth and/or ammonia exchanged zeolite form, effectively minimizes the degrading characteristics of accumulated vanadium on the catalyst. The passivation is accomplished by impregnating or, preferable, precipitating, rare earths, e.g. lanthanum, onto the catalyst particles before and/or after vanadium accumulation. The process is also applicable to inert sorbent particles, e.g. those used for removing carbon and metals from contaminated hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.