Isolation of isobutene from C.sub.4 -hydrocarbon mixtures contai

Details Isolation of isobutene from C.sub.4 -hydrocarbon mixtures contai Isolation of isobutene from C.sub.4 -hydrocarbon mixtures contai

1981-07-13

1984-05-15

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 71, 203DIG6, 203DIG19, 203 38, 568697, 585864, C07C 7148, B01D 332

Patent

active

044486430

ABSTRACT:
A process for isolating isobutene from C.sub.4 -hydrocarbon mixtures containing isobutene by reacting the mixture with a primary alcohol in the presence of an acid condensing agent, to form the tertiary ether, separating off the unconverted hydrocarbons and decomposing the tertiary ether in the presence of an acid catalyst at an elevated temperature, wherein a primary C.sub.3 - or C.sub.4 -alcohol is used and the temperature at which the reaction mixture leaves the etherification stage, in which the tertiary ether is formed, is lower than the mean temperature in the etherification stage.

REFERENCES:
patent: 3121124 (1964-02-01), Verdol
patent: 3170000 (1965-02-01), Verdol
patent: 3629478 (1971-12-01), Haunschild
patent: 3634534 (1972-01-01), Haunschild
patent: 3634535 (1972-01-01), Haunschild

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