C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/30 (2006.01) B01J 41/12 (2006.01) C08F 8/44 (2006.01)
Patent
CA 2283292
In accordance with the present invention, an improved anion-exchange chromatographic composition has been formed which comprises synthetic resin support particles and anion exchange compounds attached thereto, wherein the anion-exchange compounds comprise an internal reactive group, which may be an ester, ketone or amide group, and a terminal quaternary ammonium salt which functions as an anion-exchange site. The compositions of the present invention exhibit improved hydrolytic stability as compared to other known anion-exchange chromatographic compositions due to the presence of linkers which increase the number of atoms separating the internal reactive group form the nitrogen atom of the terminal ammonium anion-exchange site. Formed articles and methods employing the anion-exchange chromatographic composition are also provided.
L'invention porte sur une composition chromatographique échangeuse d'ions améliorée comportant des particules-support de résine synthétique et des composés échangeurs d'anions leur étant liés. Lesdits composés échangeurs d'anions comprennent un groupe réactif interne pouvant être un groupe ester, cétone ou amide, et un sel terminal d'ammonium quaternaire à fonction de site échangeur d'anions. Ladite composition présente une stabilité hydrolytique améliorée par rapport aux autres compositions chromatographiques échangeuses d'ions connues en raison de la présence de liants qui augmentent le nombre des atomes séparant le groupe réactif interne des atomes d'azote du site terminal d'ammonium échangeur d'anions. L'invention porte également sur des articles et procédés utilisant la susdite composition.
Jagodzinski Jacek
Pohl Christopher
Saini Charanjit
Dionex Corporation
Smart & Biggar
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