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    • 20. 发明授权
    • Method for recovering alkyl vinyl ether
    • 烷基乙烯基醚的回收方法
    • US6090988A
    • 2000-07-18
    • US40967
    • 1998-03-18
    • Hideyuki KambeHitoshi YanoYuuji Shimasaki
    • Hideyuki KambeHitoshi YanoYuuji Shimasaki
    • C07C41/42C07C41/00
    • C07C41/42
    • A reaction mixture in a gas form which is obtained by intramolecular dehydration of glycol ether in a gas phase is liquidized and collected by using as a collecting agent the glycol ether which is a raw material of the reaction mixture. The collected liquid thus obtained is continuously distilled by using a continuous distillation column so that a distillate containing alkyl vinyl ether and water is obtained, while a bottom product containing glycol ether is obtained. The distillate is left to stand in a separation vessel whereby separating into an oleaginous layer and an aqueous layer, so that alkyl vinyl ether is collected as the oleaginous layer. On the other hand, in the case where the bottom product contains water, the bottom product is continuously distilled together with an azeotrope former by using a continuous distillation column whereby a distillate containing an azeotrope of water and the azeotrope former, so that glycol ether is collected as a bottom product. By doing so, a method whereby alkyl vinyl ether as well as glycol ether which is the raw material and the collecting agent are efficiently collected, purified, and recovered is realized.
    • 通过在气相中通过二醇醚的分子内脱水获得的气体形式的反应混合物通过使用作为反应混合物的原料的二醇醚作为收集剂进行液化和收集。 通过使用连续蒸馏塔将得到的收集液连续蒸馏,得到含有烷基乙烯基醚和水的馏出物,得到含有二醇醚的底物。 将馏出物置于分离容器中,由此分离成油层和水层,从而收集烷基乙烯基醚作为含油层。 另一方面,在底部产品含有水的情况下,通过使用连续蒸馏塔将底部产物与共沸物一起连续蒸馏,由此得到含有共沸物和共沸物的馏出物,使得乙二醇醚为 作为底部产品收集。 通过这样做,实现了作为原料的烷基乙烯基醚以及作为原料的二醇醚和收集剂被有效收集,纯化和回收的方法。