Process for catalytic cracking two integrated cracking zones of different degrees of severity followed by a cooling zone
US7008527B2 · kind B2 · utility
16Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2002 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jul 20, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention consists in implanting an inner tube fed at its lower portion by a fraction of regenerated catalyst inside a riser (1) of an FCC unit that is fed by catalyst via a line (14) and a feedstock via a line (3), whereby the fluid that allows this feed can be inert, in which case a staging effect of the catalyst inside the riser or else a feedstock (14) that has a tendency toward a more severe cracking inside the inner tube, then leading to an additional production of olefins, in particular propylene, is advantageous. The mixtures of fluids and catalyst are cooled above the tube via a line (13) of an inert fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.