Dual riser fluid catalytic cracking process

(19)

(11)

EP 0 142 900 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.01.1986 Bulletin 1986/04

(43)	Date of publication A2:
	29.05.1985 Bulletin 1985/22

(21)	Application number: 84201664

(22)	Date of filing: 16.11.1984

(84)	Designated Contracting States:
	BE DE FR GB IT

(30)

Priority:

22.11.1983 US 554469

(71)	Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
	()

(72)	Inventor:
	Crocoll, James Fred ()

(54)	Dual riser fluid catalytic cracking process

(57) An improved fluid catalytic cracking process for achieving high conversions of low quality feedstocks (containing metal contaminants, basic nitrogen and/or coke precursors) at relatively low severities, by passing the feedstock in series through a dual riser reactor system having a common catalyst stripper and regenerator, in contact with freshly regenerated catalyst which is passed in parallel from the regenerator through each of the riser reactors.

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