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    • 3. 发明授权
    • Liquid adsorption process to produce an ultra pure product
    • 液体吸附法生产超纯产品
    • US5237111A
    • 1993-08-17
    • US930637
    • 1992-09-25
    • Carmen M. YonJohn P. BradyJoe Quock
    • Carmen M. YonJohn P. BradyJoe Quock
    • C07C41/36
    • C07C41/36C07C41/06
    • A process for the etherification and separation of C.sub.3 -C.sub.5 hydrocarbons is improved by the advantageous integration of an oxygenate recovery unit having a 3-bed arrangement into the etherification separation section. A feedstream including C.sub.3 hydrocarbons and isobutene are reacted with methanol in an etherification to produce an etherification effluent that is separated in a first separator into a bottoms stream of MTBE product and an overhead stream of unreacted isobutane, methanol, other oxygenate compounds and C.sub.3 -hydrocarbons. After recovery of methanol, in an adsorptive separation process, the methanol deficient overhead stream enters a second separation zone in the form of depropanizer for the separation of isobutane and higher boiling hydrocarbons from the C.sub.3 hydrocarbons. Any oxygenate compounds that are carried from the bottom of the column with the C.sub.4 + hydrocarbon stream are removed in an oxygenate recovery unit designed to produce an ultra pure product essentially free of oxygenates. A portion of the purified hydrocarbons from the oxygenate recovery unit are recycled as regenerant through the oxygenate recovery unit to desorb oxygenate compounds. This integration of the oxygenate recovery unit provides a closed loop for its regeneration that utilizes existing separation facilities for the removal of oxygenate compounds from the hydrocarbons of the regenerant stream.
    • 通过将具有3床布置的含氧化合物回收单元有利地整合到醚化分离部分中,C3-C5烃的醚化和分离的方法得到改善。 包含C3烃和异丁烯的进料流在甲醚中与甲醇反应生成醚化流出物,其在第一分离器中分离成MTBE产物的底部物流,未反应的异丁烷,甲醇,其它含氧化合物和C3-烃的塔顶物流 。 在甲醇回收之后,在吸附分离过程中,甲醇缺乏的顶部物流以脱丙烷塔的形式进入第二分离区,用于从C3烃分离异丁烷和较高沸点的烃。 在具有C4 +烃流的柱底部承载的任何含氧化合物在设计成产生基本上不含氧化合物的超纯产物的含氧化合物回收单元中除去。 来自含氧化合物回收单元的一部分纯化烃通过含氧化合物回收装置再循环作为再生剂以解吸含氧化合物。 含氧化合物回收单元的这种整合为其再生提供了一个闭环,其利用现有的分离设备从再生剂流的烃中除去含氧化合物。