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    • 4. 发明申请
    • SEPARATION OF OLEFINS FROM OLEFINS/PARAFFINS MIXED GAS
    • 来自烯烃/分散体混合气体的烯烃的分离
    • US20100048971A1
    • 2010-02-25
    • US12593249
    • 2008-03-28
    • Jong-Nam KimJong-Ho ParkSeong-Jun LeeMin-Su KoHee Tae BeumJongkee ParkChang Hyun KoSang Sup HanSoon-Haeng Cho
    • Jong-Nam KimJong-Ho ParkSeong-Jun LeeMin-Su KoHee Tae BeumJongkee ParkChang Hyun KoSang Sup HanSoon-Haeng Cho
    • C07C7/04C07C7/11
    • B01D53/047B01D2256/24B01D2257/7022B01D2259/40054B01D2259/4006B01D2259/40062B01D2259/40067B01D2259/403C07C7/13C07C11/08
    • The present invention relates to a method and an apparatus for the separation of C4 olefins (butene-1, trans-2-butene, cis-2-butene, etc.) and C4 paraffins (normal butane, isobutane, etc.) from a C4 hydrocarbon mixed gas including butene-1, trans-2-butene, cis-2-butene, normal butane, isobutane, etc. The method of the present invention produces C4 olefins with high purity by introducing a gaseous C4 mixture into the adsorption tower loaded with adsorbent selectively adsorbing olefins to adsorb C4 olefins and to discharge C4 paraffins to the outlet of the tower, desorbing C4 olefins adsorbed on the adsorption tower with a desorbent (C5 hydrocarbon, C6 hydrocarbon, etc.), and then separating the C4 olefin and the desorbent by a distillation process. The apparatus of the present invention is composed of several adsorption towers loaded with an adsorbent which selectively adsorb olefins and two distillation towers for the separation of the mixture gases of olefins/desorbents and paraffins/desorbents respectively, The basic operating process of the adsorption tower comprises a adsorption step of selectively adsorbing C4 olefin from the feeding mixture, a C4 olefin rinse step of removing a small amount of C4 paraffins adsorbed together with C4 olefins, and a desorption step of desorbing C4 olefins by using a desorbent, and further comprises a pressure equalization step, a cocurrent depressurization step, and a accumulation pressure step in order to increase the yield and concentration of olefins depending on the operation pressure of the adsorption tower. The desorbent discharged from the process together with olefins or paraffins is separated in the distillation tower and then recycled.
    • 本发明涉及一种用于分离C4烯烃(丁烯-1,反式-2-丁烯,顺-2-丁烯等)和C4链烷烃(正丁烷,异丁烷等)的方法和装置, 包括丁烯-1,反式-2-丁烯,顺式-2-丁烯,正丁烷,异丁烷等的C4烃混合气体。本发明的方法通过将气态C 4混合物引入吸附塔中来生产高纯度的C4烯烃 负载吸附剂选择性吸附烯烃以吸附C4烯烃并将C4链烷烃排出到塔的出口,用解吸剂(C5烃,C6烃等)解吸吸附在吸附塔上的C4烯烃,然后分离C4烯烃 和通过蒸馏方法的解吸剂。 本发明的装置由多个吸附塔组成,吸附塔分别选择性地吸附烯烃和两个蒸馏塔,用于分离烯烃/脱附剂和石蜡/脱附剂的混合气体。吸附塔的基本操作过程包括 从进料混合物中选择性吸附C4烯烃的吸附步骤,除去少量与C4烯烃一起吸附的C4链烷烃的C4烯烃漂洗步骤,以及通过使用脱附剂解吸C4烯烃的解吸步骤,还包括压力 平衡步骤,并流减压步骤和累积压力步骤,以根据吸附塔的操作压力提高烯烃的产率和浓度。 从该方法中排出的解吸剂与烯烃或链烷烃一起在蒸馏塔中分离,然后再循环。