中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

4 records (took 0.024 seconds)

    METHOD OF MAKING IMPROVED POLYIMIDE SEPARATION MEMBRANES
    1.
    发明申请
    METHOD OF MAKING IMPROVED POLYIMIDE SEPARATION MEMBRANES 审中-公开
    改进的聚酰亚胺分离膜的制备方法

    公开(公告)号：WO2018084958A1

    公开(公告)日：2018-05-11

    申请号：PCT/US2017/053151

    申请日：2017-09-25

    Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  GEORGIA TECH RESEARCH CORPORATION

    Inventor： XU, Liren ,  VAUGHN, Justin T. ,  QIU, Wulin ,  KOROS, William J. ,  BRAYDEN, Mark M. ,  MARTINEZ, Marcos M.

    IPC: B01D67/00 ,  B01D69/08 ,  B01D71/46 ,  B01D71/52 ,  B01D71/64 ,  B01D69/02 ,  C08L63/00 ,  C08L79/08 ,  B01D53/22 ,  C08G73/10

    Abstract: A polyimide separation membrane is comprised of a polyimide, a halogen compound (e.g., halogenated aromatic epoxide) that is soluble in the polyimide and a hydrocarbon having 2 to 5 carbons (e.g., ethane, ethylene, propane or propylene). The gas separation membrane has improved selectivity for small gas molecules such as hydrogen compared to polyimide membrane not containing the halogen compound or hydrocarbon. The polyimide separation membrane may be made by shaping a dope solution comprised of a polyimide, a halogen containing compound that is soluble in the polyimide, removing the solvent and then exposing the untreated polyimide membrane to a treating atmosphere comprising a hydrocarbon having 2 to 5 carbons for a sufficient time to form the polyimide membrane.

    Abstract translation: 聚酰亚胺分离膜由聚酰亚胺，可溶于聚酰亚胺中的卤素化合物（例如卤代芳族环氧化物）和具有​​2至5个碳的烃（例如乙烷，乙烯，丙烷 或丙烯）。 与不含卤素化合物或烃的聚酰亚胺膜相比，气体分离膜对氢气等小气体分子的选择性提高。 聚酰亚胺分离膜可以通过将由聚酰亚胺，可溶于聚酰亚胺的含卤素化合物，去除溶剂，然后将未处理的聚酰亚胺膜暴露于包含具有2至5个碳的烃的处理气氛 足够的时间来形成聚酰亚胺膜。

    IMPROVED METHOD TO MAKE CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES
    2.
    发明申请
    IMPROVED METHOD TO MAKE CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES 审中-公开
    改进的制备碳分子筛空心纤维膜的方法

    公开(公告)号：WO2018089114A1

    公开(公告)日：2018-05-17

    申请号：PCT/US2017/053153

    申请日：2017-09-25

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： XU, Liren ,  SHARMA, Rahul ,  HARRIS, William J. ,  BRAYDEN, Mark M. ,  MARTINEZ, Marcos M.

    IPC: B01D67/00 ,  B01D69/02 ,  B01D71/64 ,  C08G73/10 ,  B01D53/22 ,  B01D69/08 ,  B01D71/02

    Abstract: An asymmetric hollow fiber (CMS) carbon molecular sieve is made by providing a dope solution comprised of a polvimide and a solvent, at a temperature greater than 250°C that is less than the storage modulus at a temperature of 250°C, but no more than ten times less as measured using dynamic mechanical thermal analysis from 250°C to a temperature where the polyimide carbonizes. The polvimide is shaped into a hollow polvimide fiber, the solvent removed and the polyimide hollow fiber is heated to pyroiyze the polvimide and form the asymmetric hollow carbon molecular sieve. The asymmetric hollow fiber carbon molecular sieve has a wall that is defined by an inner surface and outer surface of said fiber and the wall has an inner porous support region extending from the inner surface to an outer raicroporous separation region that extends from the inner porous support region to the outer surface. Surprisingly, when the polyimide has the particular storage modulus characteristics, the method allows for the hollow fiber CMS to be made without any pre- treatmenis or additives to inhibit stractural collapse of the inner microporous region.

    Abstract translation: 通过在大于250℃的温度下提供包含聚酰亚胺和溶剂的掺杂溶液来制备不对称中空纤维（CMS）碳分子筛，所述掺杂溶液的温度大于在250℃下的储能模量 温度为250℃，但使用从250℃到聚酰亚胺碳化的温度的动态机械热分析测量时不超过十倍。 将聚酰亚胺成型为中空聚酰亚胺纤维，除去溶剂，加热聚酰亚胺中空纤维以热解聚酰亚胺并形成不对称中空碳分子筛。 所述不对称中空纤维碳分子筛具有由所述纤维的内表面和外表面限定的壁，并且所述壁具有内部多孔支撑区域，所述内部多孔支撑区域从所述内表面延伸至外部多孔分离区域，所述外部多孔分离区域从所述内部多孔支撑 区域到外表面。 令人惊奇的是，当聚酰亚胺具有特定的储能模量特性时，该方法允许制备中空纤维CMS而不用任何预处理剂或添加剂来抑制内微孔区域的结构破坏。

Patent Agency Ranking