Process for recovering olefins from manufacturing operations
    44.
    发明授权
    Process for recovering olefins from manufacturing operations 有权
    生产操作回收烯烃的工艺

    公开(公告)号:US09309171B2

    公开(公告)日:2016-04-12

    申请号:US14789166

    申请日:2015-07-01

    申请人: Paul Su

    发明人: Paul Su

    IPC分类号: C07C7/144 C07C7/09 C07C7/00

    摘要: A process for treating an effluent gas stream arising from a manufacturing operation that produces an olefin or a non-polymeric olefin derivative. The process involves cooling and condensing the effluent gas stream, which comprises an olefin, a paraffin, and a third gas, to produce a liquid condensate and an uncondensed (residual) gas stream. Both streams are then passed through membrane separation steps. The membrane separation of the uncondensed gas stream results in an olefin-enriched stream and an olefin-depleted stream. The olefin-enriched stream is recirculated within the process prior to the condensation step. The membrane separation of the condensate also results in an olefin-enriched stream, which may be recycled for use within the manufacturing operation, and an olefin-depleted stream, which may be purged from the process.

    摘要翻译: 一种处理由产生烯烃或非聚合烯烃衍生物的制造操作产生的流出气流的方法。 该方法包括冷却和冷凝包含烯烃,石蜡和第三气体的废气流,以产生液体冷凝物和未冷凝(残余)气流。 然后将两个流通过膜分离步骤。 未冷凝的气流的膜分离产生富烯烃流和烯烃贫化流。 在冷凝步骤之前,在该过程中再循环富烯烃流。 冷凝物的膜分离还导致富含烯烃的物流,其可以在制造操作中再循环使用,以及可以从该方法中清除的烯烃贫化物流。

    Process for recovering olefins in polyolefin plants
    49.
    发明授权
    Process for recovering olefins in polyolefin plants 有权
    在聚烯烃工厂中回收烯烃的方法

    公开(公告)号:US09073808B1

    公开(公告)日:2015-07-07

    申请号:US14486382

    申请日:2014-09-15

    IPC分类号: C07C7/144 C07C7/09 C07C7/00

    摘要: A process for recovering unreacted olefin in a polyolefin manufacturing process comprising the treatment of a purge bin vent gas. The process involves cooling and condensing the vent gas (purge stream), which contains at least an olefin, a paraffin, and nitrogen, to produce a liquid condensate and an uncondensed (residual) gas stream. Both streams are then passed through membrane separation steps. The membrane separation of the uncondensed gas stream results in a residue stream containing mostly nitrogen and/or paraffin and a permeate stream enriched in either C2+ hydrocarbons or olefin, depending on the type of separation. The permeate from this step is recirculated within the process prior to the condensation step. The membrane separation of the condensate results in a residue stream containing paraffin and a permeate stream enriched in olefin, which may be recycled to the polymerization reactor.

    摘要翻译: 一种在聚烯烃制造方法中回收未反应烯烃的方法,包括处理净化箱排气。 该方法包括冷却和冷凝含有至少一种烯烃,石蜡和氮气的排出气体(吹扫流),以产生液体冷凝物和未冷凝(残余)气流。 然后将两个流通过膜分离步骤。 未冷凝的气流的膜分离导致根据分离类型,主要含有氮和/或石蜡的残留物流和富含C 2 +烃或烯烃的渗透物流。 来自该步骤的渗透物在冷凝步骤之前在该过程中再循环。 冷凝物的膜分离产生含有石蜡和富含烯烃的渗透物流的残余物流,其可循环至聚合反应器。