Hydrocarbon cracking process and device using two successive...

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 9/32 (2006.01) C10G 11/18 (2006.01) C10G 51/00 (2006.01)

Patent

CA 2352018

The present invention concerns a procedure for cracking, in a fluidized bed, a hydrocarbon charge wherein the cooling particles, which may optionally also be catalytic particles, circulate in two successive reaction chambers (1; 16), in each of which they are brought into contact with at least one cut of hydrocarbons, and the reaction effluents from each of said chambers are directed towards one and the same fractionating unit. The effluents from each of the reaction chambers (1; 16) are cracked in part separately in one and the same partially partitioned fractionating unit, and at least one cut (12) obtained by separately cracking the effluents from one of the two reaction chambers (1; 16) is, as a whole or in part, reinjected into the other chamber.

L'invention concerne un procédé de craquage en lit fluidisé d'une charge hydrocarbonée dans lequel des particules caloporteuses, éventuellement catalytiques, circulent dans deux chambres réactionnelles successives (1 ; 16), dans chacune desquelles elles sont mises en contact avec au moins une coupe d'hydrocarbures, et les effluents réactionnels issus de chacune desdites chambres sont dirigés vers une même unité de fractionnement. Les effluents de chacune des chambres réactionnelles (1 ; 16) sont fractionnés en partie séparément dans une même colonne de fractionnement (12) partiellement cloisonnée, et au moins une coupe issue (13) du fractionnement séparé des effluents d'une des deux chambres réactionnelles (1 ; 16) est, en tout ou partie, réinjectée dans l'autre chambre.

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