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    Mixed bed ion exchange resin system and method of preparation
    22.
    发明授权
    Mixed bed ion exchange resin system and method of preparation 有权
    混合离子交换树脂体系及其制备方法

    公开(公告)号：US06060526A

    公开(公告)日：2000-05-09

    申请号：US226824

    申请日：1999-01-07

    Applicant: Shintaro Tasaki

    Inventor： Shintaro Tasaki

    IPC: C08J5/20 ,  B01J39/04 ,  B01J41/04 ,  B01J41/14 ,  B01J47/04 ,  B01J43/00 ,  B01J41/12

    CPC classification number: B01J39/043 ,  B01J41/043 ,  B01J41/14 ,  B01J47/04

    Abstract: A method for preparing non-agglomerating mixed bed ion exchange resin systems without affecting the ion exchange kinetics of the anion exchange resin component of the mixed bed system is disclosed. Pretreatment of the anion exchange resin component with a sulfonated poly(vinylaromatic) polyelectrolyte is particularly effective in providing non-agglomerated mixed bed systems without affecting ion exchange kinetics. Treatment levels of 10 to 800 milligrams per liter of anion exchange resin with sulfonated poly(vinylaromatic) polyelectrolyte having number average molecular weight from 5,000 to 1,000,000 are particularly preferred.

    Abstract translation: 公开了一种在不影响混床系统的阴离子交换树脂组分的离子交换动力学的情况下制备非附聚混合床离子交换树脂体系的方法。 用磺化聚（乙烯基芳族）聚电解质预处理阴离子交换树脂组分对于提供非聚集的混合床体系而不影响离子交换动力学是特别有效的。 具有数均分子量为5,000至1,000,000的具有磺化聚（乙烯基芳族）聚电解质的每升阴离子交换树脂10至800毫克的处理水平是特别优选的。

    Process for removing selenium from selenium-containing waste streams
    24.
    发明授权
    Process for removing selenium from selenium-containing waste streams 失效
    从含硒废物流中除去硒的方法

    公开(公告)号：US5855789A

    公开(公告)日：1999-01-05

    申请号：US831391

    申请日：1997-04-01

    Applicant: Paul K. Smith ,  Eugene P. Bergemann

    Inventor： Paul K. Smith ,  Eugene P. Bergemann

    IPC: B01D15/04 ,  B01J41/04 ,  C02F1/28

    CPC classification number: B01J41/043 ,  C02F1/285 ,  Y10S210/911

    Abstract: A process for removing contaminating levels of selenium from a contaminated aqueous solution is disclosed. That process includes providing a vessel or flow-permissive container containing a water-insoluble polymeric adsorption medium having a plurality of polymerized C.sub.1 -C.sub.4 N-alkylated pyridinium-containing adsorption sites. An influent of an aqueous solution having a total selenium concentration of about 10 to about 1000 parts per billion is introduced to the vessel or flow-permissive container to contact the insoluble polymeric adsorption medium. The solution is maintained in contact with that insoluble adsorption medium for a time period sufficient for the medium to bind the selenium in the contacting solution. The resulting aqueous solution is discharged from the vessel as an effluent having a total selenium concentration whose ratio to the total selenium concentration of the influent is about zero to about 10.sup.-3.

    Abstract translation: 公开了从污染的水溶液中除去硒的污染水平的方法。 该方法包括提供含有具有多个聚合的C1-C4N-烷基化的含吡啶鎓的吸附位点的水不溶性聚合物吸附介质的容器或容许容器。 将总硒浓度为约10至约1000ppm的水溶液的流入物引入容器或流动允许容器中以与不溶性聚合物吸附介质接触。 维持溶液与该不溶性吸附介质接触足以使介质在接触溶液中结合硒的时间。 所得水溶液作为流出物从容器中排出，其总硒浓度与流入物的总硒浓度的比率为约0至约10-3。

    Anion exchange method
    25.
    发明授权
    Anion exchange method 失效
    阴离子交换法

    公开(公告)号：US5350523A

    公开(公告)日：1994-09-27

    申请号：US936337

    申请日：1992-08-28

    Applicant: Masao Tomoi ,  Atsuo Kiyokawa ,  Hiromasa Ogawa ,  Teruo Onozuka ,  Tsuyoshi Ito

    Inventor： Masao Tomoi ,  Atsuo Kiyokawa ,  Hiromasa Ogawa ,  Teruo Onozuka ,  Tsuyoshi Ito

    IPC: B01J41/04 ,  B01J41/14 ,  C02F1/42 ,  B01J41/12

    CPC classification number: B01J41/043 ,  B01J41/14

    Abstract: An anion exchange method conducted at a high temperature, which comprises using a crosslinked anion exchanger which comprises structural units having a quaternary ammonium group of the following formula (a) and structural units derived from an unsaturated hydrocarbon group-containing crosslinkable monomer, and of which at least 90% of anion exchange groups are present in the form of a group represented by ##STR1## as defined in the following formula (a): ##STR2## wherein R is a --(CH.sub.2).sub.n --group (n=an integer of from 3 to 18) which may include a cyclic hydrocarbon, each of R.sub.1, R.sub.2 and R.sub.3 which are independent from one another, is a C.sub.1 -C.sub.8 hydrocarbon group or a C.sub.1 -C.sub.8 alkanol group, the benzene ring of the formula (a) may be substituted by an alkyl group or a halogen atom, or may be condensed with other aromatic ring, and X is an anion.

    Abstract translation: 在高温下进行的阴离子交换法，其包括使用交联阴离子交换剂，其包含具有下式（a）的季铵基的结构单元和源自不饱和烃基的可交联单体的结构单元，其中 至少90％的阴离子交换基团以如下式（a）所定义的由下式（a）表示的基团的形式存在：其中R是 - （CH 2）n - 基（n = 3〜18的整数），其可以包括彼此独立的R 1，R 2和R 3中的每一个为环烃，为C 1 -C 8烃基或C 1 -C 8链烷醇基，苯环为 式（a）可以被烷基或卤原子取代，或者可以与其它芳香环稠合，X是阴离子。

    Resins having improved exchange kinetics
    28.
    发明授权
    Resins having improved exchange kinetics 失效

    公开(公告)号：US5141965A

    公开(公告)日：1992-08-25

    申请号：US821524

    申请日：1992-01-14

    Applicant: William C. Pike

    Inventor： William C. Pike

    IPC: B01J41/04 ,  B01J41/14 ,  B01J45/00

    CPC classification number: C08F8/24 ,  B01J41/043 ,  B01J41/14 ,  B01J45/00 ,  C08F8/32 ,  C08F8/44 ,  Y10S423/14

    Abstract: Disclosed are novel ion-exchange and chelate-exchange resins having improved exchange kinetics for separating chemical species from liquids. The resins are prepared from copolymer beads consisting of a monovinyl aromatic monomer and a cross-linking monomer. The copolymer beads are functionalized such that weak-base exchange moieties are substituted at haloalkylated sites which are most accessible to diffusion into the beads, while hydrophilic, strong-base exchange moieties are substituted at haloalkylated sites which are least accessible to diffusion. The resins have improved exchange kinetics due to shortened diffusion path lengths for the chemical species being separated and improved diffusion into the resin beads due to the hydrophilic, strong-base exchange moieties.

    Process for removing nitrates from water
    29.
    发明授权
    Process for removing nitrates from water 失效
    从水中除去硝酸盐的方法

    公开(公告)号：US5062957A

    公开(公告)日：1991-11-05

    申请号：US518467

    申请日：1990-05-03

    Applicant: Edgar Berreby

    Inventor： Edgar Berreby

    IPC: B01J41/04 ,  B01J49/00 ,  C02F3/30 ,  C02F3/34

    CPC classification number: B01J41/043 ,  B01J49/0013 ,  C02F3/302 ,  C02F3/34 ,  Y10S210/903

    Abstract: A process for the selective removal of nitrates from water using a combination of an ion exchange resin and a biological purification. In the process, an ion exchanger in the sulfate form is used to selectively remove nitrate ions from the water to be treated. Following regeneration of the ion exchanger, the regeneration eluent containing the nitrates fixed by the selective resin is subjected to biological purification.

    Abstract translation: 使用离子交换树脂和生物净化的组合从水中选择性除去硝酸盐的方法。 在此过程中，硫酸盐形式的离子交换剂用于选择性地从待处理的水中除去硝酸根离子。 离子交换器再生后，将含有由选择性树脂固定的硝酸盐的再生洗脱液进行生物净化。

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