Devices and methods for acid and base generation

Details Devices and methods for acid and base generation Devices and methods for acid and base generation

C - Chemistry, Metallurgy

25

B

C25B 9/00 (2006.01) B01D 61/00 (2006.01) C02F 1/46 (2006.01) C25B 15/08 (2006.01)

Patent

CA 2681003

Electrochemical devices and methods for acid and base generation are disclosed. A source of purified water is fluidly connected to at least one compartment of the device. A source of an ionic species, such as an acid or base precursor, is also provided to at least one compartment of the device. An applied electrical field promotes ion transport across selective membranes which at least partially define the compartments. The purified water may be dissociated into hydronium and hydroxyl ions in an electrolyzing compartment of the device. Acid and/or base product streams may be recovered as desired at outlets of the various compartments. In some embodiments, a bipolar membrane may be used to split water in place of the electrolyzing compartment.

Cette invention concerne des dispositifs et des procédés électrochimiques de génération d'acide et de base. Une source d'eau purifiée est raccordée de manière fluidique à au moins un compartiment du dispositif. Une source d'espèce ionique, tel qu'un précurseur acide ou de base, est aussi fournie à au moins un compartiment du dispositif. Un champ électrique appliqué favorise le transfert à travers des membranes sélectives qui définissent au moins partiellement les compartiments. L'eau purifiée peut être dissociée en des ions hydronium et hydroxyle dans un compartiment d'électrolyse du dispositif. Les jets de produit acide et/ou de base peuvent être récupérés aux sorties des divers compartiments. Dans certains modes de réalisation, une membrane bipolaire peut être utilisée pour séparer l'eau au lieu du compartiment d'électrolyse.

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