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    • 30. 发明申请
    • PROCESS FOR THE PREPARATION OF ETBE
    • 制备ETBE的方法
    • WO1994008927A1
    • 1994-04-28
    • PCT/US1993007884
    • 1993-08-23
    • CHEMICAL RESEARCH & LICENSING COMPANY
    • CHEMICAL RESEARCH & LICENSING COMPANYBAKSHI, AmarjitJONES, Edward, M., Jr.STRAIN, Bobby, A.
    • C07C41/06
    • B01D3/009C07C41/06C07C41/42Y02P20/127C07C43/046
    • A process is provided for selective etherification of iC>4 with EtOH to form ETBE in a distillation column reactor containing a fixed bed acid cation exchange resin as a catalytic distillation structure in a reaction distillation zone combined with a straight pass fixed bed reactor. A C4 feed containing isobutene is mixed with the total liquid downflow from the catalytic distillation reactor and passed to a straight pass fixed bed reactor, where up to about 85 % of the isobutene is reacted with ethanol in the distillation column reactor effluent. This stream is returned to the distillation column reactor at a point below where the liquid downflow is withdrawn and then fractionated on conventional trays to remove ETBE as a bottom product. The remainder of the feed from the straight pass fixed bed reactor is vaporized into the reaction distillation zone of the distillation column reactor, where the unreacted isobutene is reacted with down coming ethanol fed at the upper end of the reaction distillation zone. Any water in the ethanol feed is stripped out and carried out the distillation column reactor with the unreacted C4's.
    • 提供了一种方法,用于在EtOH中选择性醚化IC> 4,以在含有固定床酸阳离子交换树脂作为催化蒸馏结构的蒸馏塔反应器中在与直通固定床结合的反应蒸馏区中形成ETBE 反应堆。 将含有异丁烯的C4进料与来自催化蒸馏反应器的总液体向下流混合,并通入直通固定床反应器,其中至多约85%的异丁烯与蒸馏塔反应器流出物中的乙醇反应。 将该料流返回到蒸馏塔反应器,在低于其中取出液体下流的点,然后在常规塔板上分馏,以除去作为底部产物的ETBE。 来自直通固定床反应器的剩余的进料蒸发到蒸馏塔反应器的反应蒸馏区,其中未反应的异丁烯与在反应蒸馏区的上端进料的向下的乙醇反应。 将乙醇进料中的任何水汽脱出,并用未反应的C4进行蒸馏塔反应器。