Downflow fluid catalytic cracking process and apparatus

U.S. Patent Number: 5344554

Abstract: The invention relates to a downflow fluid cracking process and apparatus. More specifically, sampling takes place of the at least partly regenerated catalyst, which must be recycled to the reactor 1 from a dense phase 17a, contained in a regenerator 17 and the stage of introducing the catalyst into the upper part 3 of the reactor 1 takes place under conditions such that the density of the thus formed gas-solid suspension is between 80 and 500 kg/m.sup.3 prior to its contacting with the charge, which is introduced by the injectors 5.

Inventors: Pontier; Renaud (Vienne, FR), Hoffmann; Frederic (Paris, FR), Galtier; Pierre (Vienne, FR)

Assignee: Institut Francais Du Petrole (Rueil Malmaison, FR)

Application Number: 07/770,265

Issued: 1994-09-06

Expired: 2006-09-06

Classes: 208/164 ; 208/113; 208/144; 208/153

Field of search: 208/164,153,144,113

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