(19)
(11) EP 0 145 466 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.07.1985 Bulletin 1985/29

(43) Date of publication A2:
19.06.1985 Bulletin 1985/25

(21) Application number: 84308523

(22) Date of filing: 07.12.1984
(84) Designated Contracting States:
BE DE FR GB IT NL

(30) Priority: 09.12.1983 US 559919

(71) Applicant: EXXON RESEARCH AND ENGINEERING COMPANY
 ()

(72) Inventors:
  • Pafford, Bernie John
     ()
  • Reid, Terry Allan
     ()

   


(54) Process for catalytic cracking of metal-contaminated hydrocarbons in which the cracking catalyst is passivated


(57) A process is described for passivating metal contaminants present in hydrocarbon feedstock (16) which contaminants are deposited on cracking catalyst. The process involves contacting the regenerated catalyst from the regeneration zone (30) with H2-containing gas (70, 74, 76, 78, 80, 96) in the transfer zone (42, 44) communicating with the regeneration zone and the reaction zone (12). The H2-containing gas may be added at a plurality of spaced apart locations to the transfer zone and preferably passes through a control means (72) which is regulated by a sensor means (82) analyzing a cracked product and/or by a sensor means (84) monitoring the catalyst circulation rate.






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