Separation of fluid cracking catalyst particles from gaseous hydrocarbons
US4455220A · kind A · utility
32Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1982 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Dec 23, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04C2009/004
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Catalyst and hydrocarbon vapors are separated in a cyclone zone attached to the discharge of a riser cracking operation. Vortex stabilizing means separating the cyclone zone from a stripping zone allows stripping gas from said stripping zone to be passed upwardly into said cyclone zone countercurrent to the downward flow of catalyst, thereby improving the separation and stripping of gaseous hydrocarbons from separated catalyst. The combined cyclone-stripping zone reduces catalyst hydrocarbon contact time, thereby improving gasoline yield and olefin content, decreasing gas make, and reducing coke deposits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.