Catalytic cracking process for hydrocarbons
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsJose Mozart Fusco, Jose Geraldo Furtado Ramos, Valmor Neves Vieira, Eduardo Cardoso de Melo Guerra
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Abstract
A process for separating catalyst particles in the catalytic cracking of reacted hydrocarbons includes feeding the reacted hydrobarbons to an unconfined cyclone device made up of a diplegless cyclone opening directly into a large volume separator vessel downwardly through a mouth and upwardly through the annular space between concentric pipes. The concentric pipes are connected to the other components of the system as well as the hydrocarbon fluid catalytic cracking process carried out in the system.
Claims6
A catalytic cracking process for hydrocarbons comprising the following steps:
- (a) mixing a hydrocarbon feed stock with a suspension of catalyst particles in a catalytic cracking zone;
- (b) cracking said feed stock in a riser;
- (c) feeding the reacted suspension into a cyclone separator system to bring about separation of the gas phase from the particle phase, a gas stream being led into the fractioning system through an outlet pipe;
- (d) collecting the particle phase in a smaller diameter vessel lying in a bottom part of a separator vessel for directing the particle phase into a regenerating zone;
- (e) purging stagnated parts of said separator vessel by injecting a purge fluid through purge fluid injecting devices;
- and
- (f) stripping catalysts in said separator vessel;
- wherein said feeding step (c) of the reacted suspension takes place directly from the riser to an unconfined cyclonic device comprising a diplegless cyclone having an open lower mouth and an upper annular space between concentric pipes which opens into said separator vessel and wherein in said purging step (e) the purge flow through purge fluid injecting devices is adjusted so that all of the purged material, together with the stripping fluid, flows from within the separator vessel through the annular space between the concentric pipes.
Dependencies are inferred from the claim text.