FCC process with secondary dealkylation zone
US5310477A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Apr 22, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G51/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
FCC process uses an open reactor vessel to house cyclones or other separation devices that reduce the carry through of product gases with the catalyst into the reactor vessel to less than 10 wt. % so that the catalyst in the reactor vessel provides a secondary dealkylation zone. By using a highly efficient separation device to remove product from the catalyst, the environment in the reactor vessel receives a low volume of cracked hydrocarbons from the riser conversion zone and provides a convenient secondary reaction zone that receives a recycled heavy gasoline fraction separated from the riser product stream. Dealkylation in the secondary reaction zone provides additional light gasoline to satisfy T90 requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.