Device for redistribution of catalyst in the FCC risers
First Claim
1. In a fluidized catalytic cracking unit comprising a vertically disposed riser housing a reaction zone, the improvement comprising at least one redistribution device for redistribution of catalyst inside said reaction zone, the catalytic cracking unit comprising feedstock injectors at a plane within the riser, and at a plane above the feedstock injectors, mixed temperature control (MTC) injectors, wherein said redistribution device has the general shape of a continuous ring adjacent the riser wall and along the inside periphery of said wall, said redistribution device creating a restriction in the cross section of the riser ranging between 30% and 45% and 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, or b) at a height of between 0.1 and 5 meters above the plane of the MTC injectors.
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Accused Products
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.
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Citations
21 Claims
- 1. In a fluidized catalytic cracking unit comprising a vertically disposed riser housing a reaction zone, the improvement comprising at least one redistribution device for redistribution of catalyst inside said reaction zone, the catalytic cracking unit comprising feedstock injectors at a plane within the riser, and at a plane above the feedstock injectors, mixed temperature control (MTC) injectors, wherein said redistribution device has the general shape of a continuous ring adjacent the riser wall and along the inside periphery of said wall, said redistribution device creating a restriction in the cross section of the riser ranging between 30% and 45% and 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, or b) at a height of between 0.1 and 5 meters above the plane of the MTC injectors.
- 19. In a fluidized catalytic 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 at a plane above the feedstock injection, mixed temperature control (MTC) injectors, wherein said redistribution device has the general shape of a continuous ring adjacent the riser wall and along the inside periphery of said wall, said redistribution device creating a restriction in the cross section of the riser ranging between 30% and 70% and 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.
Specification
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- Resources
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Current AssigneeInstitut Francais Du Petrole (IFP Energies Nouvelles), Total Raffinage France SAS (Totalenergies Se)
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Original AssigneeInstitut Francais Du Petrole (IFP Energies Nouvelles), TOTAL FRANCE
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InventorsPatureaux, Thierry, Leroy, Patrick, Roux, Romain
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Primary Examiner(s)Bhat; N.
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Application NumberUS11/641,100Publication NumberTime in Patent Office1,148 DaysField of Search422/142, 422/140, 422/145, 422/214, 422/215, 422/224, 208/146, 208/113US Class Current422/145CPC Class CodesB01J 2208/00752 FeedingB01J 2208/0084 inside the bed, e.g. bafflesB01J 2208/00982 Particulate materialB01J 8/0025 by an ascending fluidB01J 8/1863 followed by a downward move...C10G 11/18 according to the "fluidised...
