FCC process with short primary contacting and controlled secondary contacting
US5965012A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Dec 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An FCC process combines ultra short catalyst and feed contacting with the blending of spent and regenerated catalyst in a disengaging vessel that recovers a primary product and passes the separated catalyst to a riser for controlled cracking of the adsorbed heavier hydrocarbons. The disengaging vessel is used as a separation zone to quickly withdraw lighter products that are initially cracked and the riser is used for the remaining hydrocarbons as a controlled secondary cracking section to further convert heavier feed components that are not quickly displaced from the catalyst in the blending/disengaging vessel zone. A separate feed may be added riser downstream of the blending disengaging vessel for cracking of secondary feeds. The arrangement provides a great deal of flexibility in the operation of ultra short catalyst contact systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.