Device for redistribution of catalyst in the FCC risers
US7658889B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 19, 2006 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Dec 31, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/00982
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a catalytic FCC cracking unit comprising a vertically disposed riser housing a reaction zone, the improvement comprising at least one device for redistribution of catalyst inside said reaction zone, the catalytic cracking unit being equipped at a plane with feedstock injectors, and an upper plane, with mixed temperature control (MTC) injectors, wherein said device has the general shape of a continuous ring adjacent the riser wall and along the inside periphery of said wall, said device creating a restriction in the cross section of the riser ranging between 30% and 45%, having a profile section at least partially rectilinear, and being located a) either in a zone encompassed between the plane of the feedstock injectors and the plane of the MTC injectors, b) or at a height of between 0.1 and 5 meters above the plane of the MTC injectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.