Treatment of spent cracking catalysts
US4929336A · kind A · utility
11Cited by
8References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Oct 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/516
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for reactivating a spent, metal-contaminated zeolite-containing catalytic cracking catalyst composition comprises contacting the spent catalyst composition with an acidified aqueous NH.sub.4 NO.sub.3 solution, thereafter with a suitable fluorine compound (preferably dissolved NH.sub.4 F), and, optionally, additionally with an antimony compound. The thus prepared reactivated cracking catalyst composition is used in a process for catalytically cracking a liquid hydrocarbon-containing feed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.