Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1992-10-16
1994-03-08
Mars, Howard T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568699, C07C 4106
Patent
active
052929639
ABSTRACT:
An ether compound is continuously produced by a process in which (1) a C.sub.1-3 lower alcohol is reacted with a C.sub.3-6 hydrocarbon mixture comprising, as the major component thereof, an unsaturated C.sub.4-5 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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Aiche, Symposium Series, 85 (272), 82(1989).
Kanji Nakagawa
Makoto Matsuo
Mars Howard T.
Ube Industries Ltd.
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