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
AssigneeEC Erdolchemie GmbH
InventorBernhard Schleppinghoff
Life of this patent
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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.
Claims11
A process for the preparation of a mixture consisting essentially of iso-butene oligomers and methyl tert.-butyl ether, which comprises:
- (a) contacting a mixture of straight chain branch butanes and butenes with an acid catalyst whereby to convert 50% to 90% by weight of the isobutenes contained therein and to diisobutylene and triisobutylene;
- (b) contacting the reaction mixture thus obtained with at least a molar amount of methanol, relative to any residual isobutene in the presence of an acid catalyst;
- and
- (c) separating off unreacted butanes and butenes from the reaction mixture.
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;
- 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.
Dependencies are inferred from the claim text.