FCC reactor arrangement for sequential disengagement and progressive temperature reduction
US6248297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1995 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An FCC apparatus places a quench chamber above a reactor vessel and a hot stripper below a reactor vessel to provide a progressively decreasing temperature profile up the structure of the FCC arrangement and equipment for sequential reaction control. A riser contains the primary catalytic reactions of the hydrocarbon vapor and delivers the reacted vapors to the reactor structure. Starting from the bottom of the structure the hot stripper has the highest temperature and desorbs or displaces hydrocarbons from the catalyst to terminate long residence time catalytic reactions. Above the hot stripper bulk separation equipment divides the main vapor and catalyst stream to limit residence time of major catalytic reactions. At a yet higher elevation and lower internal temperature quench equipment arrests thermal reactions of the vapor stream. This structure arrangement permits reliable control of reaction time to obtain desired products and enhances mechanical reliability of the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.