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US 3,992,474 AGranted
Motor fuel production with fluid catalytic cracking of high-boiling alkylate
AssigneeUop LLC
InventorJay E. Sobel
Life of this patent
Estimating the term…
Abstract
High octane number motor fuel is produced by alkylating isobutane with an olefin to produce an alkylate separable into distinct low octane and high octane fractions, charging the low octane fraction to a fluidized catalytic cracking unit to generate more olefins which can be charged to the alkylation process to produce an increased quantity of high octane number alkylate.
Claims10
A process for the production of a high octane paraffinic motor fuel which comprises:
- a. alkylating isobutane with a high mono-olefin by contacting the olefin and isobutane with an alkylation catalyst at alkylation conditions in an alkylation zone to produce an alkylate product containing dimethylhexanes;
- b. separating said alkylate into a low-boiling, high octane fraction and a high-boiling, low octane fraction characterized by a dimethylhexane content substantially higher than said high octane fraction and having an initial boiling point of about 100.degree. to 110.degree. C;
- c. contacting at least a portion of said low octane fraction with a fluidized catalytic cracking catalyst in a fluidized catalytic cracking zone to produce isobutane and olefinic hydrocarbons, and;
- d. passing at least a portion of the olefinic hydrocarbons and isobutane produced in the fluidized catalytic cracking zone to the alkylation zone.
1 more element
A process for the production of high octane paraffinic motor fuel which comprises:
- a. alkylating isobutane with a mono-olefin by contacting the olefin and isobutane with an alkylation catalyst at alkylation conditions in an alkylation zone to produce an alkylate product containing at least 10 LV percent material boiling within the range of 140.degree. to 200.degree. C, and with an end point not exceeding 200.degree. C;
- b. separating said alkylate into a low-boiling high octane fraction and a high-boiling low octane fraction which contains hydrocarbons which boil within the range of 140.degree. to 200.degree. C;
- c. contacting at least a portion of said low octane fraction with a fluidized catalytic cracking catalyst in a fluidized catalytic cracking zone at fluidized catalytic cracking reaction conditions to produce mono-olefins and isobutane;
- and,
- d. passing at least a portion of said mono-olefins and isobutane produced in the fluidized catalytic cracking zone to the alkylation zone.
2 more elements
Dependencies are inferred from the claim text.