Process for the demetallization of FCC catalyst
US5260240A · kind A · utility
30Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/521
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for passivating the reactivity of contaminant metals, such as nickel and vanadium, which have been deposited on a catalytic cracking catalyst, by adding to the cracking catalyst a mixture of a calcium-containing material and a magnesium-containing material in a separate reactor in the presence of steam. The preferred calcium-containing material is dolomite and the preferred magnesium-containing material is sepiolite. It is also preferred to include antimony and/or bismuth compounds in the additive mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.