Patent ID: 7220351
Filing Date: 2007-05-22
Classification: C10G

Abstract:
1. A process for entrained bed or fluidised bed catalytic cracking of at least one hydrocarbon feed in at least two reaction zones, at least one ( 30 ) being a riser, into which the feed ( 31 ) and catalyst ( 35 ) from at least one regeneration zone ( 3 ) are introduced into the lower portion of the riser reaction zone, the feed and catalyst are circulated from bottom to top in said zone, the first gases produced are separated from the coked catalyst in a first separation zone ( 38 ), the catalyst is stripped ( 40 ) using a stripping gas, a first cracking and stripping effluent ( 42 ) is recovered and the coked catalyst is recycled to the regeneration zone and at least a portion thereof is regenerated using an oxygen-containing gas, the process being characterized in that catalyst ( 12 ) from at least one regeneration zone ( 13 ) and a hydrocarbon feed ( 19 ) are introduced into the upper portion of at least one dropper reaction zone ( 16 ), the catalyst and said feed are circulated from top to bottom under suitable conditions, the coked catalyst is separated from the second gases produced in a second separation zone ( 20 ), the second gases produced ( 24 ) are recovered and the coked catalyst is recycled ( 25 ) to the regeneration zone said at least one riser reaction zone and said at least one dropper reactor reaction zone being in parallel and in communication with at least one common regeneration zone.