EP 1170355 B1 20041229 - Process and apparatus for hydrocarbon cracking with two successive reaction zones
Title (en)
Process and apparatus for hydrocarbon cracking with two successive reaction zones
Title (de)
Verfahren und Einrichtung zum Cracken von Kohlenwasserstoffen in zwei aufeinanderfolgenden Reaktionstufen
Title (fr)
Procédé et dispositif de craquage d'hydrocarbures mettant en oeuvre deux chambres réactionelles successives
Publication
Application
Priority
FR 0008732 A 20000705
Abstract (en)
[origin: EP1170355A1] The effluents from each chamber are fractionated in a separate part of the same fractionating column (12) which is partially divided and at least one resulting section (13,44a) from the separate fractionating is totally or partially reinjected into the other chamber. Hydrocarbon cracking in a fluidized bed reactor in which the heat bearing particles, which are also catalytic, circulate in two successive reaction chambers (1,16) in each of which they are put in contact with at least one section of hydrocarbons. The reaction effluents from each chamber are sent to the same fractionating unit. The hydrocarbons injected into the first reaction chamber spend less time there than the hydrocarbons injected into the second reaction chamber, with the time in the first chamber being 0.05 to 5 seconds, preferably 0.1 to 1 second and the time in the second chamber being 0.1 to 10 seconds, preferably 0.4 to 5 seconds. The flow through the first chamber is essentially downwards and that in the second is essentially upwards. In the partially divided fractionating column, the heavier effluents from each chamber are fractionated separately whilst the lighter effluents are combined. The section which is reinjected is a slurry or heavy distillate containing HCO and/or a diesel section containing LCO. The heavy effluents from the first chamber are reinjected into the second. Alternatively, the lighter effluents are fractionated separately and the heavy effluents are combined, with the petrol section from the second chamber reinjected into the first. The reinjected fraction can be mixed with other fractions and/or undergo intermediate treatments before reinjection, such as hydrogenation, hydrodearomatization, hydrodesulfurization or hydrodenitrogenation. Upstream of the second chamber particles are injected both from the first chamber and from a regenerator. Device to carry out this process, comprising a partially divided fractionating column with a zone containing two separate fractionating compartments (38,39) and a common compartment (41). This divided zone can be at the top or bottom of the column and the means of division is a flat or cylindrical vertical wall.
IPC 1-7
IPC 8 full level
C10G 11/18 (2006.01); C10G 51/00 (2006.01)
CPC (source: EP US)
C10G 11/18 (2013.01 - EP US); C10G 51/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1170355 A1 20020109; EP 1170355 B1 20041229; AT E286107 T1 20050115; CA 2352018 A1 20020105; CA 2352018 C 20100202; DE 60108007 D1 20050203; DE 60108007 T2 20051208; ES 2236159 T3 20050716; FR 2811327 A1 20020111; FR 2811327 B1 20021025; US 2002096452 A1 20020725; US 2004211704 A1 20041028; US 6767451 B2 20040727; US 7544333 B2 20090609
DOCDB simple family (application)
EP 01401737 A 20010629; AT 01401737 T 20010629; CA 2352018 A 20010703; DE 60108007 T 20010629; ES 01401737 T 20010629; FR 0008732 A 20000705; US 84737404 A 20040518; US 89743601 A 20010703