Process for the joint production of highly pure 1-butene and premium gasoline from a C.sub.4 olefinic cut

US4423264A · kind A · utility

Assignee

• INSTITUT FRANCAIS DU PETROLE · FR

Inventors

• Bernard Juguin · Rueil-Malmaison, FR
• Jean Cosyns · Maule, FR
• Jean Miquel · Paris, FR

Key dates

• Filing date: Jun 25, 1982
• Grant date: Dec 27, 1983
• Expiry date: Jun 25, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Highly pure 1-butene and premium gasoline are obtained by PA0 (a) subjecting a C.sub.4 olefinic cut to a polymerization-disproportionation to partly convert the isobutene thereof to a gasoline which, in turn, by partial disproportionation, yields a jet fuel base and butenes, PA0 (b) fractionating the effluent from step (a) to a mixture (.alpha.) of gasoline and jet fuel base and to a fraction (.beta.) containing isobutane, n-butane, butenes, a small amount of isobutene and a minor amount of butadiene, PA0 (c) selectively polymerizing fraction (.beta.) to convert more than 90% of the isobutene thereof to gasoline, PA0 (d) fractionating the polymerized fraction (.beta.) to a gasoline cut (.gamma.) containing isobutene dimers and trimers and to a fraction (.delta.) containing isobutane, n-butane and butenes, PA0 (e) selectively hydrogenating the fraction (.delta.), PA0 (f) removing isobutane from the hydrogenated fraction (.delta.) and PA0 (g) fractionating the deisobutanized hydrogenated fraction (.delta.) to obtain a fraction containing at least 99% of 1-butene, the mixture (.alpha.) being admixed with the cut (.gamma.).