Regenerating of acids, particularly of strong organic acids, using
bipolar membranes
    2.
    发明授权
    Regenerating of acids, particularly of strong organic acids, using bipolar membranes 失效
    使用双极膜再生酸,特别是强有机酸

    公开(公告)号:US5993629A

    公开(公告)日:1999-11-30

    申请号:US875072

    申请日:1997-07-17

    CPC分类号: B01D61/445 C07C303/44

    摘要: An electrodialysis method using a bipolar membrane (BP) for regenerating acids, wherein a series of base (B), acid (A) and salt (S) compartments are provided between a positive electrode (anode) and a negative electrode (cathode), said compartments being defined by a series of membranes: cationic, bipolar, anionic, cationic, bipolar and so forth, and a solution being circulated through each compartment. An additional anionic membrane (10) is applied to the anionic side (11) of the bipolar membrane (BP) with no discernible gap therebetween so that contamination of the acid compartment by cations is reduced.

    摘要翻译: PCT No.PCT / FR96 / 00042 Sec。 371日期1997年7月17日 102(e)日期1997年7月17日PCT 1996年1月11日PCT PCT。 公开号WO96 / 22154 PCT 日期1996年7月25日使用双极膜(BP)再生酸的电渗析方法,其中在正极(阳极)和负极(阳极)之间设置一系列碱(B),酸(A)和盐(S) 电极(阴极),所述隔室由一系列膜定义:阳离子,双极,阴离子,阳离子,双极等,并且溶液循环通过每个隔室。 将另外的阴离子膜(10)施加到双极性膜(BP)的阴离子侧(11),在其间没有可辨别的间隙,从而降低了阳离子对酸室的污染。

    Device for ionophoresis comprising at least a membrane electrode
assembly, for the transcutaneous administration of active principles to
a subject
    3.
    发明授权
    Device for ionophoresis comprising at least a membrane electrode assembly, for the transcutaneous administration of active principles to a subject 有权
    用于离子穿透的装置,其至少包括膜电极组件,用于向受试者经皮施用活性成分

    公开(公告)号:US6064908A

    公开(公告)日:2000-05-16

    申请号:US284971

    申请日:1999-07-08

    IPC分类号: A61N1/30

    CPC分类号: A61N1/30

    摘要: The device for ionophoresis combines a donor electrode assembly, a counter electrode assembly and a generator of electricity. The donor assembly comprises a primary reservoir element containing the active principle and a secondary reservoir element containing a neutral electrolyte, these reservoir elements being separated by a semipermeable membrane in polymer material in contact with each of them, and an electrode in contact with the secondary reservoir element. The polymer material of the membrane consists at least in polyethyerblocamide with an Mn between 10000 and 300000 and containing by weight, 35% to 90% of polyamide sequences. The invention is applicable to the transcutaneous administration of active principles to a subject with improved efficiency.

    摘要翻译: PCT No.PCT / FR97 / 01997 371日期:1999年7月8日 102(e)1999年7月8日PCT 1997年11月6日PCT PCT。 第WO98 / 19735号公报 日期1998年5月14日用于离子电渗的装置结合了供体电极组件,对电极组件和发电机。 供体组件包括含有活性成分的主存储元件和含有中性电解质的次级储存器元件,这些储存元件由聚合物材料中的每个接触的半透膜隔开,并且与次级储存器接触的电极 元件。 膜的聚合物材料至少在聚乙二胺中,Mn在10000和300000之间,并且含有35重量%至90重量%的聚酰胺序列。 本发明适用于以有效的方式向受试者提供活性成分的经皮给药。

    Desalination of aqueous sulphonamide solutions
    4.
    发明授权
    Desalination of aqueous sulphonamide solutions 失效
    海水淡化磺酰胺水溶液

    公开(公告)号:US6036830A

    公开(公告)日:2000-03-14

    申请号:US172172

    申请日:1998-10-14

    CPC分类号: C07C303/44 B01D61/44

    摘要: In order to remove the salts (in particular NH.sub.4 Cl) present in an aqueous sulphonamide solution (in particular CH.sub.3 SO.sub.2 NH.sub.2), the solution is subjected to a two-compartment electrodialysis. By maintaining the pH at a value below 7, the formation of ammonia is avoided. The demineralized solution can be concentrated in order to receover after crystallization, the sulphonamide.

    摘要翻译: 为了除去存在于磺酰胺水溶液(特别是CH 3 SO 2 NH 2)中的盐(特别是NH 4 Cl),将溶液进行两室电渗析。 通过将pH保持在低于7的值,避免了氨的形成。 软化溶液可以浓缩,以便在结晶后接受磺酰胺。