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    • 2. 发明授权
    • Membrane system for natural gas upgrading
    • 天然气升级膜系统
    • US08575414B2
    • 2013-11-05
    • US13287582
    • 2011-11-02
    • Chunqing LiuSyed A. FaheemRaisa Minkov
    • Chunqing LiuSyed A. FaheemRaisa Minkov
    • C07C7/144
    • C10L3/104B01D53/22B01D2256/245B01D2257/504C10L3/101Y02C10/04Y02C10/10
    • The present invention involves the use of a novel membrane system for natural gas upgrading. This membrane system includes a first-stage membrane such as a membrane prepared from the polymer of intrinsic microporosity (PIM) to selectively remove hydrocarbons from C3 to C35 to control the dew point of natural gas, and a second-stage membrane such as a polybenzoxazole (PBO) or crosslinked PBO membrane to selectively remove CO2 from natural gas. The new membrane system described in the current invention eliminates the use of high cost and high footprint membrane pretreatment. Therefore, the membrane system can significantly reduce the footprint and cost for natural gas upgrading compared to the current commercially available membrane systems that include a non-membrane-related pretreatment system.
    • 本发明涉及使用新型膜系统进行天然气升级。 该膜系统包括由本征微孔聚合物(PIM)制备的膜的第一级膜,以选择性地从C3至C35去除烃,以控制天然气的露点;以及第二级膜,例如聚苯并恶唑 (PBO)或交联的PBO膜以选择性地从天然气中除去CO 2。 本发明描述的新膜系统消除了高成本和高占地面积的膜预处理的使用。 因此,与目前市场上可买到的膜系统(包括非膜相关的预处理系统)相比,膜系统可显着减少天然气升级的占地面积和成本。
    • 4. 发明授权
    • Polybenzoxazole membranes prepared from aromatic polyamide membranes
    • 由芳香族聚酰胺膜制备的聚苯并恶唑膜
    • US08459469B2
    • 2013-06-11
    • US12879244
    • 2010-09-10
    • Chunqing LiuRaisa MinkovSyed A. FaheemMan-Wing TangLubo ZhouJeffery C. Bricker
    • Chunqing LiuRaisa MinkovSyed A. FaheemMan-Wing TangLubo ZhouJeffery C. Bricker
    • B01D71/62B01D71/68B01D71/38
    • B01D53/228B01D71/62B01D2323/30B01D2323/345C08G69/26C08G69/32C08G73/22C08L79/04H01M8/1027H01M8/103
    • The present invention discloses high performance polybenzoxazole membranes prepared from aromatic poly(o-hydroxy amide) membranes by thermal cyclization and a method for using these membranes. The polybenzoxazole membranes were prepared by thermal treating aromatic poly(o-hydroxy amide) membranes in a temperature range of 200° to 550° C. under inert atmosphere. The aromatic poly(o-hydroxy amide) membranes used for making the polybenzoxazole membranes were prepared from aromatic poly(o-hydroxy amide) polymers comprising pendent phenolic hydroxyl groups ortho to the amide nitrogen in the polymer backbone. In some embodiments of the invention, the polybenzoxazole membranes may be subjected to an additional crosslinking step to increase the selectivity of the membranes. These polybenzoxazole membranes showed significantly improved permeability for gas separations compared to the precursor aromatic poly(o-hydroxy amide) membranes and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used in catalysis and fuel cells.
    • 本发明公开了通过热环化由芳族聚(邻羟基酰胺)膜制备的高性能聚苯并恶唑膜和使用这些膜的方法。 通过在惰性气氛下在200〜550℃的温度范围内热处理芳族聚(邻羟基酰胺)膜来制备聚苯并恶唑膜。 用于制备聚苯并恶唑膜的芳族聚(邻羟基酰胺)膜是由芳族聚(邻羟基酰胺)聚合物制备的,该聚合物包括聚合物骨架中酰胺氮原子邻位的酚羟基。 在本发明的一些实施方案中,聚苯并恶唑膜可以进行额外的交联步骤以增加膜的选择性。 与前体芳族聚(邻羟基酰胺)膜相比,这些聚苯并恶唑膜显示出显着改善气体分离的渗透性,并且不仅适用于各种液体,气体和蒸气分离,而且还可用于催化和燃料电池 。