Title: Addition of olefins to cat cracker feed to modify product selectivity and quality

Abstract: A process for increasing the octane rating of gasoline and decreasing the quantity of coke produced by a catalytic cracking process by adding C.sub.2 to C.sub.6 linear olefins to the feed to the reactor with a zeolite containing cracking catalyst. The olefins may be added separately or mixed with the gas oil feed just before the oil preheat section ahead of the reactor.

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Inventors: Blazek, Sr., James J. (Reisterstown, MD, US)
Ritter, Ronald E. (Columbia, MD, US)

Application Number: 876712
Filing Date: 1978-02-10
Publication_date: 1979-03-27
Assignee: W. R. Grace & Co. (New York, NY)
Primary Class(es): 208/120.01 208/52CT, 208/71, 208/103, 208/290, 585/413, 585/415
Other Classes:
US Patent Ref:

2626233	Jan, 1953	Kimberlin et al.	208/113.
3542668	Nov, 1970	Pool	208/67.
3630886	Dec, 1971	Deed et al.	208/96.
3758400	Sep, 1973	Hampton	208/72.
3788977	Jan, 1974	Dolbear et al.	208/120.
3954600	May, 1976	Gladrow et al.	208/119.
3974062	Aug, 1976	Owen et al.	208/74.
3974063	Aug, 1976	Owen et al.	208/74.
4002557	Jan, 1977	Owen et al.	208/120.
4035285	Jul, 1977	Owen et al.	208/120.

Other Refs:
Primary Examiner: Gantz, Delbert E.
Assistant Examiner: Schmitkons, G. E.
Attorney: Savage; Arthur P.