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

C - Chemistry, Metallurgy

07

C

260/719.1

C07C 11/02 (2006.01) C07C 7/12 (2006.01) C07C 7/148 (2006.01) C07C 41/06 (2006.01)

Patent

CA 1185273

ABSTRACT OF THE DISCLOSURE 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 terl.-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 absorption 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.

405355

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