Gas separation using C3+ hydrocarbon-resistant membranes
    1.
    发明授权
    Gas separation using C3+ hydrocarbon-resistant membranes 有权
    使用C3 +耐烃隔膜进行气体分离

    公开(公告)号:US06361582B1

    公开(公告)日:2002-03-26

    申请号:US09574303

    申请日:2000-05-19

    IPC分类号: B01D5322

    摘要: A process for separating a gas from a gas mixture containing the gas and a C3+ hydrocarbon vapor, using gas-separation membranes selective for the gas over the C3+ hydrocarbon vapor. The membranes use a selective layer made from a polymer having repeating units of a fluorinated polymer, and demonstrate good resistance to plasticization by the organic components in the gas mixture under treatment, and good recovery after exposure to liquid aromatic hydrocarbons.

    摘要翻译: 使用对C3 +烃蒸汽上的气体有选择性的气体分离膜,分离气体与含有气体和C3 +烃蒸气的气体混合物的方法。 膜使用由具有氟化聚合物的重复单元的聚合物制成的选择层,并且在处理后的气体混合物中表现出良好的耐化学性,并且在暴露于液体芳族烃之后具有良好的回收率。

    Gas separation using organic-vapor-resistant membranes and PSA
    3.
    发明授权
    Gas separation using organic-vapor-resistant membranes and PSA 有权
    使用有机 - 蒸气阻隔膜和PSA进行气体分离

    公开(公告)号:US06592650B2

    公开(公告)日:2003-07-15

    申请号:US10105923

    申请日:2002-03-25

    IPC分类号: B01D5304

    摘要: A process for separating a gas from a gas mixture containing an organic compound gas or vapor by a hybrid separation combining adsorption with membrane gas separation, using membranes selective for the gas over the organic compound. The membranes use a selective layer made from a polymer having repeating units of a fluorinated cyclic structure of an at least 5-member ring, and demonstrate good resistance to plasticization by the organic components in the gas mixture under treatment.

    摘要翻译: 一种通过混合分离组合吸附与膜气分离从含有有机化合物气体或蒸气的气体混合物中分离气体的方法,使用对有机化合物上的气体有选择的膜。 膜使用由具有至少5元环的氟化环状结构的重复单元的聚合物制成的选择层,并且在处理的气体混合物中表现出良好的抗塑化性。

    Membrane-augmented polypropylene manufacturing
    8.
    发明授权
    Membrane-augmented polypropylene manufacturing 失效
    膜增强聚丙烯制造

    公开(公告)号:US06271319B1

    公开(公告)日:2001-08-07

    申请号:US09651300

    申请日:2000-08-30

    IPC分类号: C08F204

    摘要: A process for polypropylene manufacturing, including treating a vent stream from the polymerization reactor, to recover propylene for return to the reactor. The process involves using a gas separation membrane to separate propylene from propane in the reactor vent stream. The membrane separation step results in a residue stream typically containing as much as 30% propane or more, which is vented from the polymerization process, and a permeate stream containing 95% or less propylene, which is recirculated to the polymerization reactor.

    摘要翻译: 一种用于聚丙烯制造的方法,包括处理来自聚合反应器的排气流,以回收丙烯以返回反应器。 该方法包括使用气体分离膜在反应器排气流中从丙烷分离丙烯。 膜分离步骤导致通常含有多于30%的丙烷或更多的残余物流,其从聚合过程中排出,以及含有95%或更少丙烯的渗透物流,其被再循环到聚合反应器中。

    Natural gas separation using nitrogen-selective membranes of modest selectivity
    9.
    发明授权
    Natural gas separation using nitrogen-selective membranes of modest selectivity 有权
    使用氮选择性膜的天然气分离具有适度的选择性

    公开(公告)号:US06572678B1

    公开(公告)日:2003-06-03

    申请号:US10033680

    申请日:2001-12-28

    IPC分类号: B01D5322

    摘要: A process for treating natural gas or other methane-rich gas to remove excess nitrogen and optionally excess carbon dioxide, water vapor or hydrogen sulfide. The invention relies on gas separation by membranes, using nitrogen/methane selective membranes. The membranes are characterized by having the capability to exhibit a nitrogen/methane selectivity between about 2 and 5 at a temperature higher than about −25° C. The gas may be brought to pipeline specification for nitrogen, and acid gases if present, without requiring the use of amine scrubbing or other acid gas removal technique.

    摘要翻译: 用于处理天然气或其它富含甲烷的气体以除去过量的氮气和任选地过量的二氧化碳,水蒸气或硫化氢的方法。 本发明依赖于使用氮/甲烷选择性膜的膜的气体分离。 膜的特征在于在高于约-25℃的温度下具有在约2和5之间显示氮/甲烷选择性的能力。可以将气体设置为管道规格的氮气和酸性气体(如果存在),而不需要 使用胺洗涤或其他酸性气体去除技术。