Cycle oil conversion process
OwnerGordon F. Stuntz, George A. Swan III +4inventors
InventorsGordon F. Stuntz, George A. Swan III, William E. Winter, Michel Daage, Michele S. Touvelle, Darryl P. Klein
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Abstract
The invention relates to a process for converting cycle oils produced in catalytic cracking reactions into light olefin and naphtha. More particularly, the invention relates to a process for hydroprocessing a catalytically cracked light cycle oil in order to form a hydroprocessed cycle oil containing a significant amount of tetralins. The hydroprocessed cycle oil is then re-cracked in an upstream zone of the primary FCC riser reactor.
Claims9
A method for catalytically cracking a primary feed comprising the continuous steps of:
- (a) injecting the primary feed into an FCC riser reactor having at least a first reaction zone and a second reaction zone upstream of the first reaction zone, the primary feed being injected into the first reaction zone;
- (b) cracking the primary feed in the first reaction zone under catalytic cracking conditions in the presence of a catalytically effective amount of a regenerated, zeolite-containing, catalytic cracking catalyst in order to form at least partially spent catalyst and a cracked product;
- (c) separating at least a cycle oil from the cracked product and then hydroprocessing at least a portion of the cycle oil in the presence of a catalytically effective amount of a hydroprocessing catalyst under hydroprocessing conditions in order to form a hydroprocessed cycle oil having an increased concentration of tetralins;
- (d) injecting the hydroprocessed cycle oil into the second reaction zone;
- and
- (e) cracking the hydroprocessed cycle oil under cycle oil catalytic cracking conditions in the presence of the catalytic cracking catalyst.
Dependencies are inferred from the claim text.