Title: Improved device and the production process for fluid charge catalytic cracking of hydrocarbon oils
Application Number: 85108854 Application Date: 1985.12.06
Publication Number: 1000709 Publication Date: 1986.05.10
Approval Pub. Date: 1990.11.07 Granted Pub. Date: 1990.11.07
International Classifi-cation: B01J38/04;C10G11/18
Applicant(s) Name: Compagnie Frncaise de Raffinage Address:
Inventor(s) Name: Mauleon Jean-Louis;Sigavd Jean-Bernard
Attorney & Agent: WU DAJIAN QUAN JING
Abstract:
    The present invention relates to a process for the fluid catalytic cracking of a hydrocarbon charge, which comprises bringing said charge and particles of a cracking catalyst into contact in ascending flow in a riser under cracking conditions; separating the spent catalyst and the cracked charge downstream of the upper end of said riser; stripping the spent catalyst by means of a gas injected countercurrently to this catalyst; regenerating said catalyst under combustion conditions of the coke deposited thereon; recycling the catalyst regenerated at the feed to said riser; and regenerating the catalyst to circularly support the said advance pipe. According to the present invention, 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.
Time: 8