Process for the preparation of pure tert.-olefins

Details Process for the preparation of pure tert.-olefins Process for the preparation of pure tert.-olefins

1982-06-04

1983-10-11

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

585327, 585649, 585809, 585824, 585840, 585865, 585324, 568917, 568697, C07C 701, C07C 712

Patent

active

044094213

ABSTRACT:
Pure tert.-olefins are prepared from mixtures of hydrocarbons, which contain at least one such tert.-olefin, by reaction with an alkanol to give the corresponding alkyl tert.-alkyl ethers, and subsequent cleavage of these ethers back to the corresponding pure tert.-olefins and the alkanol, and the separation of the pure tert.-olefin from the alkanol. For this, the alkanol present after the cleavage of the ether is separated from the tert.-olefin to the extent of 60 to 99% by weight by distillation, and the residual amount of alcohol in the olefin fraction is removed by adsorption from this fraction onto a synthetic ion exchanger as an absorber resin. The admixture of the alkanol to the mixture of hydrocarbons with at least one tert.-olefin is carried out partly by using the alkanol fraction arising from the separating off of the pure tert.-olefin, and partly by desorption of the alkanol from the absorber resin with the aid of the mixture of hydrocarbons containing at least 1 tert.-olefin.

REFERENCES:
patent: 3170000 (1965-02-01), Verdol
patent: 3409691 (1968-11-01), Small
patent: 3489808 (1970-04-01), Eberly, Jr.
patent: 3634535 (1972-01-01), Haunschied
patent: 3751507 (1973-08-01), Walker
patent: 3922217 (1975-11-01), Cohen et al.
patent: 4287379 (1981-09-01), Brunner et al.
patent: 4320232 (1982-03-01), Volkamer et al.

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