Stage catalyst concentric annular stripper
US5260034A · kind A · utility
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15References
6Claims
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Key dates
| Filing date | Apr 24, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Apr 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for rapid stripping of fluid cracking catalyst is disclosed. A series of concentric annular beds provide rapid initial removal of hydrocarbons from the interstices of the catalyst particles. Successive stages of stripping allow time for hydrocarbon diffusion from catalyst's pores while maintaining low hydrocarbon partial pressure. Residence times increase as the catalyst passes to the different catalyst beds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.