EP 0184517 B1 19880518 - HYDROCARBON FEED CATALYTIC CRACKING PROCESSES AND APPARATUSES
Title (en)
HYDROCARBON FEED CATALYTIC CRACKING PROCESSES AND APPARATUSES
Publication
Application
Priority
FR 8418706 A 19841207
Abstract (en)
[origin: EP0184517A1] 1. In a process for the fluid catalytic cracking of a hydrocarbon charge, comprising a stage for bringing said charge and particles of a cracking catalyst into contact in ascending flow in a riser under cracking conditions, a stage for separating the spent catalyst and the cracked charge downstream of the upper end of said riser, a stage for stripping the spent catalyst by means of a gas injected countercurrently to this catalyst, a stage for regenerating said catalyst under combustion conditions of the coke deposited thereon, and a stage for recycling the catalyst regenerated at the feed to said riser, the improvement lying in the fact that, after said catalyst has undergone said stripping and before being subjected to said regeneration, it is subjected to a desorption stage by a gas injected co-currently to the catalyst at a temperature at least 25 degrees C higher thant he temperature of the catalyst particles which have just undergone said stripping stage, and in that the resultant mixture of spent catalyst and gas is injected into the fluidised portion of the regeneration zone situated above the dense fluidised bed.
IPC 1-7
IPC 8 full level
C10G 11/18 (2006.01)
CPC (source: EP)
C10G 11/18 (2013.01)
Designated contracting state (EPC)
BE CH DE FR GB IT LI LU NL
DOCDB simple family (publication)
EP 0184517 A1 19860611; EP 0184517 B1 19880518; CN 1006895 B 19900221; CN 85108854 A 19860510; DE 3562780 D1 19880623; FR 2574422 A1 19860613; FR 2574422 B1 19880108; ZA 859374 B 19860924
DOCDB simple family (application)
EP 85402416 A 19851204; CN 85108854 A 19851206; DE 3562780 T 19851204; FR 8418706 A 19841207; ZA 859374 A 19851206