Process for the preparation of a mixture consisting essentially of iso-butene oligomers and methyl tert.-butyl ether, its use, and fuels containing such mixture

US4377393A · kind A · utility

Assignee

• EC Erdolchemie GmbH · DE

Inventor

• Bernhard Schleppinghoff · Dormagen, DE

Key dates

• Filing date: Oct 27, 1980
• Grant date: Mar 22, 1983
• Expiry date: Oct 27, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2531/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A fuel for a carburetor type engine consisting essentially of isobutene oligomers and methyl tert.-butyl ether, said fuel prepared by a process comprising: (a) in a first step contacting a mixture of straight chain and branched butanes and butenes with an acid catalyst whereby to oligomerize 50% to 90% by weight of the isobutene contained therein: (b) contacting the reaction mixture from step (a) with at least a molar amount of methanol, relative to the residual isobutene, in the presence of an acid catalyst; and (c) separating off from the reaction mixture unreacted butanes and butenes.