TWO-LAYER MEMBRANE
    93.
    发明申请
    TWO-LAYER MEMBRANE 审中-公开
    两层膜

    公开(公告)号:WO2012097386A2

    公开(公告)日:2012-07-19

    申请号:PCT/US2012028513

    申请日:2012-03-09

    Inventor: HERRON JOHN R

    Abstract: A method of forming a two-layered membrane by immersion precipitation including: depositing a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; depositing on top of the first hydrophilic polymer solution a second, different hydrophilic polymer solution optimized to produce a high performance dense layer; and forming the two-layer polymer solution into one of a forward osmosis membrane and a pressure retarded osmosis membrane by bringing the second, different hydrophilic polymer solution into contact with water to form the dense layer. A two-layered membrane formed by immersion precipitation includes: a porous layer formed from a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; and a dense layer on top of and supported by the porous layer, the dense layer formed from a second, different hydrophilic polymer solution optimized to produce a high performance dense layer.

    Abstract translation: 一种通过浸渍沉淀形成双层膜的方法,包括:沉积具有优化以制备高性能多孔层的制剂的第一亲水聚合物溶液; 在第一亲水聚合物溶液的顶部上沉积第二种不同的亲水性聚合物溶液,其优化以产生高性能致密层; 并通过使第二种不同的亲水性聚合物溶液与水接触以形成致密层,将双层聚合物溶液形成正向渗透膜和压阻渗透膜之一。 通过浸渍沉淀形成的双层膜包括:由第一亲水聚合物溶液形成的多孔层,其具有优化的制剂以产生高性能多孔层; 以及由多孔层顶部并由其支撑的致密层,致密层由优化以产生高性能致密层的第二不同的亲水性聚合物溶液形成。

    PREPARATION METHOD OF HOLLOW FIBER MEMBRANE FOR WATER TREATMENT USING CELLULOSE-BASED RESIN
    94.
    发明申请
    PREPARATION METHOD OF HOLLOW FIBER MEMBRANE FOR WATER TREATMENT USING CELLULOSE-BASED RESIN 审中-公开
    纤维素基树脂用于水处理的中空纤维膜的制备方法

    公开(公告)号:WO2012074222A2

    公开(公告)日:2012-06-07

    申请号:PCT/KR2011008537

    申请日:2011-11-10

    CPC classification number: B01D69/087 B01D67/0088 B01D69/08 B01D71/16

    Abstract: The present invention relates to a preparation method of a hollow fiber membrane for water treatment, wherein the hollow fiber membrane is prepared by preparing a spinning composition comprising a cellulose-based resin, a poor solvent, a plasticizer and an organic solvent, and spinning the spinning composition to a non-solvent. The present invention makes up for shortcomings of conventional preparation methods of a hollow fiber membrane, that is, can easily increase the physical properties of a separator for water treatment, shows easy reproducibility, and can provide a nanofilter (NF) and a reverse osmosis (RO) hollow fiber membrane for water treatment capable of obtaining high efficiency with a low cost.

    Abstract translation: 本发明涉及一种水处理用中空纤维膜的制造方法,其中,中空纤维膜是通过制备含有纤维素类树脂,不良溶剂,增塑剂和有机溶剂的纺丝用组合物而制备的, 将组合物纺丝成非溶剂。 本发明弥补了传统中空纤维膜制备方法的缺点,即可以容易地增加水处理用隔膜的物理性质,显示出容易的再现性,并且可以提供纳米过滤器(NF)和反渗透( RO)用于水处理的中空纤维膜,能够以低成本获得高效率。

    中空糸型逆浸透膜及びその製造方法
    95.
    发明申请
    中空糸型逆浸透膜及びその製造方法 审中-公开
    中空纤维类型反转膜及其生产方法

    公开(公告)号:WO2012026373A1

    公开(公告)日:2012-03-01

    申请号:PCT/JP2011/068612

    申请日:2011-08-17

    Abstract:  液状混合物からの固体分離または溶質分離において低い運転コストで透水性能と除去性能を高いレベルで達成した中空糸型逆浸透膜を提供する。 酢酸セルロースからなる中空糸型逆浸透膜であって、塩化ナトリウム濃度1500mg/Lの水溶液を、25℃、圧力1.5MPaで中空糸型逆浸透膜の外側から内側へ向かって濾過した際の透水量が180~350L/m 2 /日であり、塩除去率が90.0~99.0%であること、及び中空糸型逆浸透膜の外径が100~280μmであり、内径が50~200μmであり、中空率が24~42%であることを特徴とする。中空糸型逆浸透膜は、外表面近傍に緻密層を有し、緻密層厚みが0.1~7μmであることが好ましい。

    Abstract translation: 提供一种中空纤维型反渗透膜,其在固体分离或溶质与液体混合物的分离中可以实现高水平的渗透性能和低运行成本的高水平去除性能。 一种中空纤维型反渗透膜,其包含乙酸纤维素,其特征在于,当氯化钠浓度为1500mg的水溶液时,渗透水的量为180-350L / m 2 /天,除盐率为90.0-99.0% L在25℃,压力1.5MPa下,从膜外侧向膜内部通过中空纤维型反渗透膜过滤,中空纤维型反渗透膜的外径 100-280μm,内径为50-200μm,中空比为24-42%。 优选地,中空纤维型反渗透膜在其外表面附近具有致密层,致密层的厚度为0.1-7μm。

    HIGH PLASTICIZATION-RESISTANT CROSS-LINKED POLYMERIC MEMBRANES FOR SEPARATIONS
    99.
    发明申请
    HIGH PLASTICIZATION-RESISTANT CROSS-LINKED POLYMERIC MEMBRANES FOR SEPARATIONS 审中-公开
    高分离耐高温交联聚合物膜

    公开(公告)号:WO2010008660A1

    公开(公告)日:2010-01-21

    申请号:PCT/US2009/042932

    申请日:2009-05-06

    Abstract: This invention involves a composition, a method of making, and an application of high plasticization-resistant chemically cross-linked polymeric membranes such as cross-linked cellulose acetate (CA) membrane. These cross-linked polymeric membranes with covalently interpolymer-chain-connected rigid networks showed no decrease in CO 2 /CH 4 ideal selectivity under 690 kPa (100 psig) pure CO 2 pressure and also no CO 2 plasticization up to 3447 kPa (500 psig) pure CO 2 pressure. By using the method of chemical cross-linking as described in this invention, the separation characteristics of the polymeric membranes can be decisively improved. These new cross-linked polymeric membranes can be used not only for gas separations such as CO 2 /CH 4 and CO 2 /N 2 separations, O 2 /N 2 separation, olefin/paraffin separations (e.g. propylene/propane separation), iso/normal paraffins separations, but also for liquid separations such as pervaporation and desalination.

    Abstract translation: 本发明涉及一种组合物,制备方法,以及应用高耐增塑作用的化学交联聚合物膜,例如交联乙酸纤维素(CA)膜。 这些具有共价互聚链连接的刚性网络的交联聚合物膜在690kPa(100psig)纯二氧化碳压力下没有显示CO 2 / CH 4理想选择性的降低,并且也没有CO2增塑达3447kPa(500psig)纯二氧化碳压力 。 通过使用如本发明所述的化学交联方法,可以确定地提高聚合物膜的分离特性。 这些新的交联聚合物膜不仅可用于气体分离,如CO2 / CH4和CO2 / N2分离,O2 / N2分离,烯烃/石蜡分离(如丙烯/丙烷分离),异/正链烷烃分离,但 还用于液体分离,例如渗透蒸发和脱盐。

    METHOD FOR MAKING HIGH FLUX, HIGH SALT REJECTION CELLULOSE DESALTING MEMBRANES
    100.
    发明申请
    METHOD FOR MAKING HIGH FLUX, HIGH SALT REJECTION CELLULOSE DESALTING MEMBRANES 审中-公开
    制备高通量,高盐度抑制纤维素脱盐膜的方法

    公开(公告)号:WO2008140839A1

    公开(公告)日:2008-11-20

    申请号:PCT/US2008/052916

    申请日:2008-02-04

    CPC classification number: B01D71/16 B01D67/0011 B01D2325/24 C08B3/06

    Abstract: A method is provided for producing a high flux, high salt rejection cellulose acetate desalination membrane. In this method, cellulose acetate polymer is dissolved in a first solvent such as methylene chloride or 2-methyltetrahydrofuran to produce a solution. Further steps involve stirring the solution, and thereafter permitting the solution to settle, for a time sufficient for a majority of the cellulose acetate to precipitate out of the solution to form a cellulose acetate precipitate. Next, the cellulose acetate precipitate is stirred into an excess methanol. Thereafter, the cellulose acetate is filtered out and used in making the desalination membrane.

    Abstract translation: 提供了一种用于生产高通量,高盐度脱盐醋酸纤维素脱盐膜的方法。 在该方法中,将乙酸纤维素聚合物溶解在第二溶剂如二氯甲烷或2-甲基四氢呋喃中以产生溶液。 进一步的步骤包括搅拌溶液,然后允许溶液沉降足够的时间,以使大部分乙酸纤维素从溶液中沉淀出来形成乙酸纤维素沉淀物。 接着,将乙酸纤维素沉淀物搅拌成过量的甲醇。 此后,过滤掉乙酸纤维素,并用于制造脱盐膜。

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