Large capacity acid or base generator and method of use

B - Operations – Transporting – 01 – D

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B01D 15/08 (2006.01) C25B 1/16 (2006.01) C25B 1/22 (2006.01) G01N 30/02 (2006.01) G01N 30/34 (2006.01) G01N 30/60 (2006.01)

Patent

CA 2284285

Method and apparatus for generating an acid or base, e.g., for chromatographic analysis of ions. For generating a base, a cation source, such as a salt, cation hydroxide or cation exchange resin, is provided in a cation reservoir (10) separated from a base generation chamber (12) by a permselective barrier (14). An aqueous stream (21) flows through the base generation chamber (12) containing a cation exchange material (19). An electric potential is applied between an anode (16) in the ration source reservoir (10) and a cathode (18) in the base generation chamber (12) to electrolytically generate hydroxide ions and cause rations in the reservoir (10) to electromigrate through the barrier (14) toward the cathode (18) to combine with the migrated rations to form ration hydroxide, which flows from the base generation chamber (12).

L'invention concerne un procédé et un appareil permettant de produire un acide ou une base, par exemple, pour l'analyse chromatographique d'ions. Pour former une base, on utilise une source de cations, tel qu'un sel, un hydroxyde cationique ou une résine échangeuse de cations, dans un réservoir (10) de cations séparé d'une chambre (12) de production d'une base par une barrière (14) permsélective. Un courant (21) aqueux s'écoule à travers la chambre (12) de production d'une base renfermant une matière (19) échangeuse de cations. On applique un potentiel électrique entre une anode (16) située dans le réservoir (10) de la source de cations et une cathode (18) située dans la chambre (12) de production de la base pour générer électrolytiquement des ions hydroxyde et provoquer l'électromigration des cations présents dans le réservoir (10) à travers la barrière (14) en direction de la cathode (18) afin qu'ils se combinent aux cations migrés pour former un hydroxyde cationique, lequel s'écoule à partir de ladite chambre (12).

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