Natural gas separation using nitrogen-selective membranes of modest selectivity
    6.
    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。

    Gas separation using C3+ hydrocarbon-resistant membranes
    7.
    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。

    Composite membrane, method of preparation and use
    10.
    发明授权
    Composite membrane, method of preparation and use 失效
    复合膜,制备和使用方法

    公开(公告)号:US4963165A

    公开(公告)日:1990-10-16

    申请号:US295686

    申请日:1988-10-31

    IPC分类号: B01D71/80 C08J3/09

    摘要: A membrane for gas separation or pervaporation. The membrane is a composite of a microporous support membrane and an ultrathin permselective membrane, the permselective membrane being made from a polyamide-polyether block copolymer having the general form: ##STR1## where PA is a saturated aliphatic polyamide segment, PE is a polyether segment, and n is a positive integer. The membrane is particularly useful in separating polar gases from non-polar gases.

    摘要翻译: 用于气体分离或渗透蒸发的膜。 该膜是微孔支撑膜和超薄选择性选择膜的复合物,该选择性选择膜由具有以下一般形式的聚酰胺 - 聚醚嵌段共聚物制成:其中PA是饱和脂族聚酰胺链段,PE是聚醚链段 ,n为正整数。 该膜特别可用于分离极性气体与非极性气体。