Patent ID: 7655822

Claim:
A gas-solid reactor comprising: at least one catalyst containment zone ( 1 ), at least one first reaction zone operating in dense or fast mode ( 9 ), ( 10 ), ( 11 ), a fluidization device ( 5 ) in the lower portion of said at least one catalyst containment zone ( 1 ), means for supplying a primary feed to said at least one first reaction zone or to said at least one catalyst containment zone, at least one second reaction zone operating in transported mode ( 15 ), and a primary gas-solid separator wherein said second reaction zone is directly connected to said primary gas-solid separator, said primary separator comprising a series of separation chambers ( 17 ) and stripping chambers ( 18 ), said separation and stripping chambers being disposed alternately around the sidewalls of said second reaction zone ( 15 ), ( 16 ), each of the separation chambers ( 17 ) communicating with said second reaction zone ( 15 ), ( 16 ) via openings ( 19 ) provided in the side walls of the second reaction zone ( 16 ), each of said separation chambers ( 17 ) comprises a rounded upper wall ( 20 ) and a substantially parallel deflector ( 21 ) which separate, by the centrifugal effect, solid particles and largely dedusted gas, wherein said separation chamber ( 17 ) has a lower portion which receives the separated solid particles, and said lower portion of the separation chamber ( 17 ) is connected to a stripping zone ( 30 ) via openings ( 23 ), and wherein each of said stripping chambers ( 18 ) communicating with a separation chamber ( 17 ) via an opening ( 24 ), cut in the vertical wall ( 25 ) of the separation chamber ( 17 ) at a level located beneath the deflector ( 21 ), through which said largely dedusted gas is introduced into the stripping chambers ( 18 ), and said stripping chambers ( 18 ) having lower portions ( 31 ) which communicate with said stripping zone ( 30 ), and said stripping chambers ( 18 ) having upper portions that communicate via line ( 26 ) with at least one secondary gas-solid separation system.