Method of catalytic cracking of hydrocarbons

Details Method of catalytic cracking of hydrocarbons Method of catalytic cracking of hydrocarbons

1974-11-25

1976-11-23

Gantz, Delbert E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 80, 208120, 208155, 208164, B01J 824, C10G 1104

Patent

active

039935566

ABSTRACT:
In a fluid catalytic cracking unit utilizing a zeolite cracking catalyst and employing a multiplicity of elongated reaction zones or risers, significant improvements are obtained by introducing a light gas oil to at least one elongated reaction zone and a heavier gas oil to at least one other elongated reaction zone. Optionally, the vaporous effluent from either or both elongated reaction zones may be subjected to further cracking in the dense phase of catalyst in the reactor vessel. Operating conditions within the elongated reaction zones are established to permit the conversion of the heavier gas oil to be 0-30 volume percent lower than the light gas oil. Higher yields of higher octane gasoline are obtained where the unit is operated in the disclosed manner.

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patent: 3448037 (1969-06-01), Bunn et al.
patent: 3617496 (1971-11-01), Bryson et al.
patent: 3647714 (1972-03-01), White
patent: 3650946 (1972-03-01), Mourning

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