| 摘要 |
An ether compound is continuously produced by a process in which (1) a C1-3 lower alcohol is reacted with a C3-6 hydrocarbon mixture comprising, as the major component thereof, an unsaturated C4-5 hydrocarbon compound; (2) the resultant mixture comprising the ether compound, a non-reacted lower alcohol and a non-reacted hydrocarbon mixture is distilled to provide a bottom liquid fraction comprising the ether compound and a top vapor fraction comprising the non-reacted lower alcohol and hydrocarbon mixture; (3) the bottom liquid fraction is collected (4) the top vapor fraction discharged through a top outlet of the distillation column and liquefied is fed to a separating membrane module whereby the liquefied top fraction is brought into contact with one side face of an aromatic polyimide asymmetric separating membrane having a separation factor, of 200 or more, while exposing the opposite side face of the membrane to a reduced pressure so as to allow the lower alcohol fraction to selectively permeate, through the membrane; and (5) the permeated lower alcohol fraction is cooled and returned to the reaction step.
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