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US 4,301,315 AGranted
Method of producing high octane alkylate gasoline
AssigneePhillips Petroleum Company
InventorsDonald M. Haskell, Floyd Farha, Jr.
Life of this patent
Estimating the term…
Abstract
A stream comprising isobutylene and n-butenes is processed to effect dimerization of the isobutylene, and the resulting isobutylene dimer is fed to an alkylation step.
Claims5
A process for producing a high octane alkylate gasoline, 1,3-butadiene, and high purity butene-1 from a 4-carbon olefin-containing feed stream comprising isobutylene, butenes-2, and butene-1, said process comprising:
- (a) charging a first portion of said 4-carbon olefin-containing feed stream to an isobutylene dimerization reaction so as to form a first reaction mixture containing dimers;
- (b) fractionally distilling is a first fractional distillation zone at least a portion of said first reaction mixture so as to recover said dimers and to produce a second stream comprising said butenes-2 and said butene-2;
- (c) charging said dimers to an alkylation feed stream;
- (d) charging a first portion of said second stream to a butadiene reaction so as to form 1,3-butadiene as a product of said process;
- (e) charging a second portion of said 4-carbon olefin-containing feed stream to said alkylation feed stream;
- (f) charging said alkylation feed stream to an alkylation process so as to form a high octane alkylate gasoline;
- and
- (g) charging a second portion of said second stream to a second fractional distillation zone to produce a high purity butene-1 stream and to produce a third stream comprising butenes-2.
5 more elements
Dependencies are inferred from the claim text.