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33 条记录 (耗时 0.028 秒)

    Chargedasymmetric mosaic membrances
    3.
    发明授权
    Chargedasymmetric mosaic membrances 失效
    带电对称马赛克膜

    公开(公告)号：US5304307A

    公开(公告)日：1994-04-19

    申请号：US801859

    申请日：1991-12-03

    申请人： Charles Linder ,  Mara Nemas ,  Mordechai Perry ,  Reuven Ketraro

    发明人： Charles Linder ,  Mara Nemas ,  Mordechai Perry ,  Reuven Ketraro

    IPC分类号： B01D61/02 ,  B01D67/00 ,  B01D69/02 ,  B01D69/14 ,  B01D71/82 ,  B01D13/00

    CPC分类号： B01D67/0093 ,  B01D67/0011 ,  B01D69/02 ,  B01D69/141 ,  B01D2323/08 ,  B01D2323/12 ,  B01D2323/30 ,  B01D2325/022 ,  B01D2325/20

    摘要： The present invention relates to semipermeable mosaic polymer membranes of asymmetric structure and with a macroscopic distribution of the mosaic-forming anionic and cationic charges (sites). The membranes can be prepared by casting a polymer solution of an optionally charged matrix-forming polymer and at least one precursor polymer, incompatible with the matrix-forming polymer, in a selected solvent, into a film, forming a skin on one side of the film, precipitating the skinned film to form the asymmetric membrane and charging it by chemical reactions to introduce or complete their mosaic structure. These membranes have good permeability for electrolytes, such as salts of mono- or polyvalent inorganic acids, while retaining low molecular weight organic solutes.

    摘要翻译： 本发明涉及不对称结构的半透性镶嵌聚合物膜和马赛克形成阴离子和阳离子电荷（位点）的宏观分布。 膜可以通过将任选带电的基质形成聚合物的聚合物溶液和在选定的溶剂中与基质形成聚合物不相容的至少一种前体聚合物浇铸成膜，从而在 膜，沉淀皮膜以形成不对称膜，并通过化学反应进行充电以引入或完成其镶嵌结构。 这些膜对于电解质具有良好的渗透性，例如单价或多价无机酸的盐，同时保留低分子量的有机溶质。

    Process and device for separating electrically charged macromolecular compounds by forced-flow membrane electrophoresis
    4.
    发明授权
    Process and device for separating electrically charged macromolecular compounds by forced-flow membrane electrophoresis 失效
    通过强制流膜电泳分离电荷充电的大分子化合物的方法和装置

    公开(公告)号：US5087338A

    公开(公告)日：1992-02-11

    申请号：US435837

    申请日：1989-11-14

    申请人： Mordechai Perry ,  Jack Gilron ,  Reuven Ketraro ,  Charles Linder

    发明人： Mordechai Perry ,  Jack Gilron ,  Reuven Ketraro ,  Charles Linder

    IPC分类号： B01D57/02 ,  C07K1/24 ,  C07K1/26 ,  C07K1/28 ,  C07K14/76 ,  G01N27/447

    CPC分类号： G01N27/44769 ,  B01D57/02 ,  C07K1/24 ,  C07K1/26

    摘要： A process and apparatus for the continuous separation of electrically charged macromolecular compounds, such as proteins, by forced-flow membrane electrophoresis is provided.Said process is conducted in an electrophoretic cell comprising a membrane compartment, divided by a micro- or ultrafiltration membrane into a feed and permeate cell, and electrode compartments being partitioned from the membrane compartment with ion-exchange membranes, which are impermeable to the macromolecular compounds, and have virtually no permeability to salts.The electrophoretic process comprises the steps of recycling a mixed solution of the charged compounds which are dissolved in a separation buffer through the feed cell, subjecting of the solution to a pressure-driven membrane separation, applying an electric field across the membranes and the solution to cause electrophoretic migration of the charged compound and to separate them, and withdrawing the charged compounds thus separated.The process achieves separation of charged compounds having differences of their isoelectric points in a range of as low as 0.1 to 0.2. The process is very useful to remove charged contaminants from the desired compounds.

    Electrodialysis process for the separation of non-essential amino acids from derivatives thereof
    6.
    发明授权
    Electrodialysis process for the separation of non-essential amino acids from derivatives thereof 失效
    用于从其衍生物分离非必需氨基酸的电渗析方法

    公开(公告)号：US4238306A

    公开(公告)日：1980-12-09

    申请号：US12214

    申请日：1979-02-14

    申请人： Mordechai Perry ,  Ora Kedem

    发明人： Mordechai Perry ,  Ora Kedem

    IPC分类号： B01D13/02

    CPC分类号： B01D61/44 ,  B01D2311/04

    摘要： The invention provides a process for the separation, by electrodialysis, of a mixed aqueous solution containing a non-essential amino acid and a derivative of that acid in ionic form, into at least two separate product solutions of acid and derivative respectively, of which at least one solution contains highly pure product obtained at high quantitative yield, comprising providing an electrodialysis stack, continuously introducing a feed solution containing a non-essential amino acid and derivative thereof to be separated into feed cells of the stack, adjusting the flow rate and concentration of the solution and the electric current density applied to values adapted to create concentration polarization conditions adjacent to the membranes in the feed cells thereby accumulating a high local concentration of protons upon the surface of the anion exchange membranes, and a high local concentration of hydroxyl ions upon the cation exchange membranes and maintaining the pH of the bulk solution in the feed cells in a range of between 4-8, irrespective of the isoelectric point of the amino acid, in order to adjust for pH changes of the bulk solution occurring due to unequal rates of water dissociation at the cation and anion exchange membranes.

    摘要翻译： 本发明提供了一种通过电渗析将含有离子形式的非必需氨基酸和该酸的衍生物的混合水溶液分离成至少两种分开的酸和衍生物的分离产物溶液的方法，其中在 至少一种溶液含有以高定量产率获得的高纯度产物，包括提供电渗析叠层，连续引入含有非必需氨基酸的衍生物及其衍生物，将其分离成堆叠的饲料细胞，调节流速和浓度 的溶液和电流密度施加到适于产生与进料电池中的膜相邻的浓度极化条件的值，从而在阴离子交换膜的表面上积聚高的局部浓度的质子，并且高的局部浓度的羟基离子 在阳离子交换膜上并保持大量溶液的pH 在饲料细胞中在4-8之间的范围内，与氨基酸的等电点无关，以便调节由于在阳离子和阴离子交换膜处的水解离不相等而产生的本体溶液的pH变化 。

    Silicon-derived solvent stable membranes
    8.
    发明授权
    Silicon-derived solvent stable membranes 失效
    硅衍生的溶剂稳定膜

    公开(公告)号：US5265734A

    公开(公告)日：1993-11-30

    申请号：US986753

    申请日：1992-12-08

    申请人： Charles Linder ,  Mara Nemas ,  Mordechai Perry ,  Reuven Katraro

    发明人： Charles Linder ,  Mara Nemas ,  Mordechai Perry ,  Reuven Katraro

    IPC分类号： B01D69/02 ,  B01D69/12 ,  B01D71/42 ,  B01D71/70 ,  B01D61/02 ,  B01D61/14

    CPC分类号： B01D69/02 ,  B01D69/125 ,  B01D71/42 ,  B01D71/70

    摘要： A composite membrane comprises a substrate made from a polymer selected from copolymers and homopolymers of ethylenically unsaturated nitriles, which substrate has preferably first been treated with a pore protector in absence of curing agents and catalysts therefor, prior to applying as the final coating a silicone layer, which is crosslinked. The pore protector, which may be, for example, a hydroxy-terminated polysiloxane, particularly a silanol-terminated polysiloxane, serves the dual purpose of preventing the pores from collapsing, when the support is dried during the curing of the silicone layer, and of preventing passage of the coating material deeply into the pores and thus also preventing an undue reduction of the flux of the finished coated membrane. Such composite membranes include solvent stable membranes which swell to an extent of no more than about 10% when immersed in various organic solvents, and their mixtures with each other and/or water.

    摘要翻译： 复合膜包括由选自共聚物和烯键式不饱和腈的均聚物的聚合物制成的基材，该基材优选首先在没有固化剂和催化剂的情况下首先用孔保护剂处理，然后在作为最终涂层施加硅树脂层 ，其是交联的。 孔保护剂可以是例如羟基封端的聚硅氧烷，特别是硅烷醇封端的聚硅氧烷，其用途是防止当硅氧烷层固化期间载体干燥时孔隙塌陷的双重目的，以及 防止涂层材料深深地渗透到孔中，从而也防止成品涂布膜的焊剂过度减少。 这种复合膜包括当浸入各种有机溶剂中时其膨胀至不超过约10％程度的溶剂稳定的膜，以及它们彼此的混合物和/或水。

    Modified acrylonitrile polymer containing semipermeable membranes
    10.
    发明授权
    Modified acrylonitrile polymer containing semipermeable membranes 失效
    含有半透膜的改性丙烯腈聚合物

    公开(公告)号：US4477634A

    公开(公告)日：1984-10-16

    申请号：US355656

    申请日：1982-03-08

    申请人： Charles Linder ,  Gershon Aviv ,  Mordechai Perry ,  Reuven Kotraro

    发明人： Charles Linder ,  Gershon Aviv ,  Mordechai Perry ,  Reuven Kotraro

    IPC分类号： B01D67/00 ,  B01D71/42 ,  C08F8/00 ,  C08F8/34 ,  C08F8/30

    CPC分类号： B01D67/0093 ,  B01D71/42 ,  C08F8/00 ,  B01D2323/30

    摘要： Semipermeable membranes of polyacrylonitrile or copolymers of acrylonitrile and other ethylenically unsaturated monomers are chemically modified through reaction with (a) hydroxylamine and (b) a poly functional ionic colorless cyclic carbonic acid imide-halide capable of reaction with amidoxime groups, and optionally containing ionic groups. The new membranes show good compaction and solvent resistance and are stable over a broad temperature and pH range. They are suitable for reverse osmosis and especially ultrafiltration processes.

    摘要翻译： 聚丙烯腈的半透膜或丙烯腈和其它烯属不饱和单体的共聚物通过与（a）羟胺和（b）能够与偕胺肟基反应并且任选地含有离子基团的多官能离子无色环状碳酸酰亚胺 - 卤化物的反应而化学改性 。 新的膜显示出良好的压实和耐溶剂性，并且在宽的温度和pH范围内是稳定的。 它们适用于反渗透，特别是超滤过程。