Enhanced diisobutene production in the presence of methyl tertiary butyl ether
AssigneeChemical Research & Licensing Company
InventorLawrence A. Smith, Jr.
Life of this patent
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Abstract
In the liquid phase reaction of isobutene in the presence of resin cation exchange resins with itself in a C.sub.4 hydrocarbon stream to form dimers, the formation of higher polymers, oligomers, and co-dimer by-products is suppressed by the presence of 0.0001 to 1 mole per mole of isobutene of methyl tertiary butyl ether.
Claims13
In a liquid process for separating isobutene from a stream containing isobutene, and other hydrocarbons, comprising contacting said stream in liquid phase at a temperature in the range of 35.degree. to 160.degree. C. with a fixed bed cation exchange resin for a sufficient time to react at least a portion of the isobutene present therein with itself to form dimers and recovering a product stream containing said dimers and having a lower isobutene content than said feed stream whereby the formation of higher olegomers and codimers of isobutene with other olefins is suppressed, wherein the improvement comprises having said stream consists of isobutene, other hydrocarbons and a small amount of MTBE.
The method of producing diisobutene from a stream containing isobutene while suppressing the formation of higher oligomers comprising, contacting a hydrocarbon feedstream consisting of from 9 to 60 mole % isobutene, other hydrocarbons and 0.005 to 1 mole of MTBE per mole of isobutene in liquid phase at a temperature in the range of 65.degree. to 120.degree. C. cation exchange resin in a fixed bed for a sufficient time to react a portion of said isobutene and recovering a product stream containing diisobutene and MTBE.
Dependencies are inferred from the claim text.