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    Air dried cellulose acetate membranes
    1.
    发明授权
    Air dried cellulose acetate membranes 失效
    空气干燥醋酸纤维素膜

    公开(公告)号：US4855048A

    公开(公告)日：1989-08-08

    申请号：US150265

    申请日：1988-01-29

    申请人： Man-Wing Tang ,  William M. King ,  C. Glen Wensley

    发明人： Man-Wing Tang ,  William M. King ,  C. Glen Wensley

    IPC分类号： B01D71/16 ,  B01D67/00 ,  C01B32/50 ,  C08J9/28 ,  F26B5/00

    CPC分类号： B01D67/0095 ,  F26B5/005 ,  Y10S264/48

    摘要： The method of preparing dried asymmetric cellulose acetate blend membranes through the use of at least one drying agent which is a hydrophobic organic compound, such as polysiloxanes, hydrocarbons, ethers, ketones, chlorohydrocarbons or nitrohydrocarbons. The membranes are dried from their aqueous state by direct evaporation of water. The resulting air dried membranes are suitable for the desalination of water by reverse osmosis, non-aqueous liquid separation, ultrafiltration, pervaporation, and for the separation of various gaseous mixtures into their constituent parts.

    摘要翻译： 通过使用至少一种作为疏水性有机化合物的干燥剂如聚硅氧烷，烃，醚，酮，氯代烃或硝基烃来制备干燥的不对称醋酸纤维素共混膜的方法。 通过直接蒸发水从其水性状态干燥膜。 所得的空气干燥膜适用于通过反渗透，非水液体分离，超滤，渗透蒸发以及将各种气态混合物分离成其组成部分来对水进行脱盐。

    Gas separations using high performance mixed matrix membranes
    3.
    发明授权
    Gas separations using high performance mixed matrix membranes 有权
    使用高性能混合基质膜进行气体分离

    公开(公告)号：US07998246B2

    公开(公告)日：2011-08-16

    申请号：US11612388

    申请日：2006-12-18

    申请人： Chunoing Liu ,  Man-Wing Tang ,  Stephen T. Wilson ,  David A. Lesch

    发明人： Chunoing Liu ,  Man-Wing Tang ,  Stephen T. Wilson ,  David A. Lesch

    IPC分类号： B01D53/22

    CPC分类号： B01D69/141 ,  B01D53/228 ,  B01D61/362 ,  B01D67/0079

    摘要： The present invention discloses a novel method of making high performance mixed matrix membranes (MMMs) using stabilized concentrated suspensions of solvents, uniformly dispersed polymer stabilized molecular sieves, and at least two different types of polymers as the continuous blend polymer matrix. MMMs as dense films or asymmetric flat sheet or hollow fiber membranes fabricated by the method described in the current invention exhibit significantly enhanced permeation performance for separations over the polymer membranes made from the continuous blend polymer matrix. MMMs of the present invention are suitable for a wide range of gas, vapor, and liquid separations such as alcohol/water, CO2/CH4, H2/CH4, O2/N2, CO2/N2, olefin/paraffin, iso/normal paraffins, and other light gases separations.

    摘要翻译： 本发明公开了使用稳定的溶剂浓缩悬浮液，均匀分散的聚合物稳定化分子筛和至少两种不同类型的聚合物作为连续共混聚合物基质制备高性能混合基质膜（MMM）的新方法。 通过本发明所述方法制造的致密膜或非对称平板或中空纤维膜的MMM显示出从由连续共混聚合物基质制成的聚合物膜上的分离显着增强的渗透性能。 本发明的MMM适用于各种气体，蒸汽和液体分离，例如醇/水，CO 2 / CH 4，H 2 / CH 4，O 2 / N 2，CO 2 / N 2，烯烃/石蜡，异/正构链烷烃， 和其他轻质气体分离。

    POLYBENZOXAZOLE MEMBRANES
    4.
    发明申请
    POLYBENZOXAZOLE MEMBRANES 有权
    聚苯并噻唑膜

    公开(公告)号：US20110072973A1

    公开(公告)日：2011-03-31

    申请号：US12879208

    申请日：2010-09-10

    申请人： Chunqing Liu ,  Raisa Minkov ,  Man-Wing Tang ,  Lubo Zhou ,  Jeffery C. Bricker

    发明人： Chunqing Liu ,  Raisa Minkov ,  Man-Wing Tang ,  Lubo Zhou ,  Jeffery C. Bricker

    IPC分类号： B01D53/22

    CPC分类号： B01D53/228 ,  B01D61/362 ,  B01D67/0011 ,  B01D71/62 ,  B01D71/82 ,  B01D2323/08

    摘要： The present invention discloses a blends of an aromatic polyimide polymer and a polymer containing aromatic sulfonic acid groups that can be converted into polybenzoxazole (PBO) membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO2/CH4 and H2/CH4 separations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.

    摘要翻译： 本发明公开了芳族聚酰亚胺聚合物和含有芳族磺酸基团的聚合物的混合物，其可以转化成用于气体，蒸气和液体分离的聚苯并恶唑（PBO）膜。 通过热处理含有0.05至20重量％聚（苯乙烯磺酸）聚合物的芳族聚酰亚胺膜制备的PBO膜。 与没有聚（苯乙烯磺酸）聚合物的相应芳族聚酰亚胺膜制备的PBO膜相比，这些聚合物显示出对CO 2 / CH 4和H 2 / CH 4分离的选择性提高高达95％。

    High Performance Cross-Linked Polybenzoxazole and Polybenzothiazole Polymer Membranes
    5.
    发明申请
    High Performance Cross-Linked Polybenzoxazole and Polybenzothiazole Polymer Membranes 有权
    高性能交联聚苯并恶唑和聚苯并噻唑聚合物膜

    公开(公告)号：US20100133186A1

    公开(公告)日：2010-06-03

    申请号：US12412633

    申请日：2009-03-27

    申请人： Chunqing Liu ,  Man-Wing Tang ,  Raisa Serbayeva ,  Lubo Zhou

    发明人： Chunqing Liu ,  Man-Wing Tang ,  Raisa Serbayeva ,  Lubo Zhou

    IPC分类号： B01D71/06 ,  B01D61/36

    CPC分类号： B01D53/228 ,  B01D61/362 ,  B01D67/0006 ,  B01D71/62 ,  B01D2256/10 ,  B01D2256/24 ,  B01D2257/104 ,  B01D2257/108 ,  B01D2257/304 ,  B01D2257/504 ,  B01D2258/05 ,  B01D2258/06 ,  B01D2323/30 ,  Y02C10/10 ,  Y02C20/20

    摘要： In the present invention high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes and methods for making and using these membranes have been developed. The cross-linked polybenzoxazole and polybenzothiazole polymer membranes are prepared by: 1) first synthesizing polyimide polymers comprising pendent functional groups (e.g., —OH or —SH) ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone; 2) fabricating polyimide membranes from these polymers; 3) converting the polyimide membranes to polybenzoxazole or polybenzothiazole membranes by heating under inert atmosphere such as nitrogen or vacuum; and 4) finally converting the membranes to high performance cross-linked polybenzoxazole or polybenzothiazole membranes by a crosslinking treatment, preferably UV radiation. The membranes can be fabricated into any convenient geometry. The high performance cross-linked polybenzoxazole and polybenzothiazole polymer membranes of the present invention are suitable for a variety of liquid, gas, and vapor separations.

    摘要翻译： 在本发明中，开发了高性能交联聚苯并恶唑和聚苯并噻唑聚合物膜以及制备和使用这些膜的方法。 交联的聚苯并恶唑和聚苯并噻唑聚合物膜是通过以下步骤制备的：1）首先合成聚酰亚胺聚合物，其包含与杂环酰亚胺氮邻接的侧基官能团（例如-OH或-SH）和聚合物主链中的可交联官能团; 2）从这些聚合物制造聚酰亚胺膜; 3）通过在惰性气氛如氮气或真空下加热将聚酰亚胺膜转化为聚苯并恶唑或聚苯并噻唑膜; 和4）最后通过交联处理，优选UV辐射将膜转化成高性能交联聚苯并恶唑或聚苯并噻唑膜。 膜可以制造成任何方便的几何形状。 本发明的高性能交联聚苯并恶唑和聚苯并噻唑聚合物膜适用于各种液体，气体和蒸气分离。

    METHOD TO IMPROVE THE SELECTIVITY OF POLYBENZOXAZOLE MEMBRANES
    9.
    发明申请
    METHOD TO IMPROVE THE SELECTIVITY OF POLYBENZOXAZOLE MEMBRANES 有权
    提高聚苯并噻唑薄膜选择性的方法

    公开(公告)号：US20100133190A1

    公开(公告)日：2010-06-03

    申请号：US12566834

    申请日：2009-09-25

    申请人： Chunqing Liu ,  Raisa Minkov ,  Man-Wing Tang ,  Lubo Zhou ,  Jeffery C. Bricker

    发明人： Chunqing Liu ,  Raisa Minkov ,  Man-Wing Tang ,  Lubo Zhou ,  Jeffery C. Bricker

    IPC分类号： B01D71/76 ,  B01D67/00 ,  B01D71/06 ,  B01D71/64 ,  C08J5/22

    CPC分类号： B01D53/228 ,  B01D67/0093 ,  B01D71/62 ,  B01D2323/08

    摘要： The present invention discloses a novel method to improve the selectivities of polybenzoxazole (PBO) membranes prepared from aromatic polyimide membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO2/CH4 and H2/CH4 separations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.

    摘要翻译： 本发明公开了一种提高由芳族聚酰亚胺膜制备的用于气体，蒸汽和液体分离的聚苯并恶唑（PBO）膜的选择性的新方法。 通过热处理含有0.05至20重量％聚（苯乙烯磺酸）聚合物的芳族聚酰亚胺膜制备的PBO膜。 与没有聚（苯乙烯磺酸）聚合物的相应芳族聚酰亚胺膜制备的PBO膜相比，这些聚合物显示出对CO 2 / CH 4和H 2 / CH 4分离的选择性提高高达95％。

    Asymmetric Gas Separation Membranes with Superior Capabilities for Gas Separation
    10.
    发明申请
    Asymmetric Gas Separation Membranes with Superior Capabilities for Gas Separation 审中-公开
    具有优异气体分离能力的不对称气体分离膜

    公开(公告)号：US20080143014A1

    公开(公告)日：2008-06-19

    申请号：US11612412

    申请日：2006-12-18

    申请人： Man-Wing Tang

    发明人： Man-Wing Tang

    IPC分类号： B29D7/01 ,  C08K5/1565 ,  C08K5/3415

    CPC分类号： B29C41/24 ,  B01D53/228 ,  B01D67/0011 ,  B01D67/0083 ,  B01D67/0088 ,  B01D71/18 ,  B01D71/64 ,  B01D71/68 ,  B01D2323/283 ,  B01D2325/022 ,  B29K2001/00 ,  B29K2001/12 ,  B29K2079/08 ,  B29K2081/06 ,  C08K5/1565 ,  C08K5/3415 ,  Y02P20/132

    摘要： This invention relates to a method of making flat sheet asymmetric membranes, including cellulose diacetate/cellulose triacetate blended membranes, polyimide membranes, and polyimide/polyethersulfone blended membranes by formulating the polymer or the blended polymers dopes in a dual solvent mixture containing 1,3 dioxolane and a second solvent, such as N,N′-methylpyrrolidinone (NMP). The dopes are tailored to be closed to the point of phase separation with or without suitable non-solvent additives such as methanol, acetone, decane or a mixture of these non-solvents. The flat sheet asymmetric membranes are cast by the phase inversion processes using water as the coagulation bath and annealing bath. The dried membranes are coated with UV curable silicone rubber. The resulting asymmetric membranes exhibit excellent permeability and selectivity compared to the intrinsic dense film performances.

    摘要翻译： 本发明涉及通过在含有1,3-二氧戊环的双重溶剂混合物中配制聚合物或共混聚合物涂料来制备平板非对称膜的方法，包括纤维素二乙酸酯/三乙酸纤维素共混膜，聚酰亚胺膜和聚酰亚胺/聚醚砜共混膜 和第二溶剂如N，N'-甲基吡咯烷酮（NMP）。 使用或不使用合适的非溶剂添加剂如甲醇，丙酮，癸烷或这些非溶剂的混合物将掺合物定制为封闭到相分离点。 通过使用水作为凝固浴和退火浴的相转化法浇铸平板不对称膜。 干燥的膜用可UV固化的硅橡胶涂覆。 与内在致密膜性能相比，所得到的不对称膜表现出优异的渗透性和选择性。