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    Supported, mechanically stable bipolar membrane for electrodialysis
    1.
    发明授权
    Supported, mechanically stable bipolar membrane for electrodialysis 失效
    支持的机械稳定的双极膜电渗析

    公开(公告)号：US5288385A

    公开(公告)日：1994-02-22

    申请号：US852817

    申请日：1992-03-17

    Applicant: Ora Kedem ,  Abraham Warshawsky

    Inventor： Ora Kedem ,  Abraham Warshawsky

    IPC: B01D61/46 ,  B01D61/44 ,  B01D69/02 ,  B01D71/68 ,  B01D71/82 ,  C08J5/22 ,  B01D61/42

    CPC classification number: B01D61/445 ,  C08J5/2275 ,  C08J2381/06

    Abstract: A supported, mechanically stable bipolar membrane for electrodialysis having a cation-exchange layer on one side and an anion-exchange layer on the other side of a single sheet of woven fabric. The cation exchange layer is heterogeneous, the anion exchange layer is homogeneous and the two are interlocked. A process of making such bipolar membranes is described. The bipolar membrane may be fabricated into electrodialysis cells in which two membranes are joined along their edges.

    Abstract translation: 一种用于电渗析的支撑的，机械稳定的双极膜，其在一侧具有阳离子交换层，在单层织物的另一侧具有阴离子交换层。 阳离子交换层是非均相的，阴离子交换层是均匀的，两者互锁。 描述制造这种双极性膜的方法。 双极膜可以制成电渗析池，其中两个膜沿其边缘连接。

    Electrodialysis device
    2.
    发明授权
    Electrodialysis device 失效
    电渗析装置

    公开(公告)号：US4033850A

    公开(公告)日：1977-07-05

    申请号：US632801

    申请日：1975-11-17

    Applicant: Ora Kedem ,  Abraham Kedem

    Inventor： Ora Kedem ,  Abraham Kedem

    IPC: B01D61/48 ,  B01D13/02

    CPC classification number: B01D61/48

    Abstract: An electrodialysis device comprising a plurality of adjacent compartments through which there flow dialysate and brine, respectively, each dialysate compartment being separated from the adjoining two brine compartments by an anion-selective and by a cation-selective membrane, respectively, the two terminal compartments being connected to an anode and to a cathode of a current source, wherein in the space between the membranes there is provided a continuous anion conductive element and a continuous cation conductive element, in contact with each other, each of these consisting of a different kind of ion-exchange material, the anion selective material being in contact with the anion-selective membrane, the cation selective exchange material being in contact with the cation selective membrane, the electric resistance of said elements being lower than that of the dialysate, said elements providing a path for the different ions across a larger part of the distance between the membranes.

    Abstract translation: 一种电渗析装置，包括多个相邻的隔室，分别通过该隔室和透析液和盐水分别通过阴离子选择性膜和阳离子选择性膜将每个透析液隔室与相邻的两个盐水隔室分开，两个末端隔室为 连接到电流源的阳极和阴极，其中在膜之间的空间中设置有彼此接触的连续的阴离子导电元件和连续的阳离子导电元件，其中每一个由不同种类的 离子交换材料，阴离子选择性材料与阴离子选择性膜接触，阳离子选择性交换材料与阳离子选择性膜接触，所述元件的电阻低​​于透析液的电阻，所述元件提供 跨越膜之间较大部分距离的不同离子的路径。

    Electrodialysis process for the separation of non-essential amino acids from derivatives thereof
    5.
    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

    Applicant: Mordechai Perry ,  Ora Kedem

    Inventor： Mordechai Perry ,  Ora Kedem

    IPC: B01D13/02

    CPC classification number: B01D61/44 ,  B01D2311/04

    Abstract: 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.

    Abstract translation: 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 。

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