Process for control of multistage catalyst regeneration with full then partial CO combustion
US5011592A · kind A · utility
52Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Jul 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/182
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for controlled, multi-stage regeneration of FCC catalyst is disclosed. A modified high efficiency catalyst regenerator, with a fast fluidized bed coke combustor, dilute phase transport riser, and second fluidized bed regenerates the catalyst in at least two stages. The primary stage of regeneration is in the coke combustor, at full CO oxidation conditions. The second stage of catalyst regeneration occurs in the second fluidized bed, at partial CO combustion conditions. The process permits regeneration of spent FCC catalyst while minimizing NOx exmissions and achieving significant reduction of SOx.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.