Preparation of onium hydroxides in an electrochemical cell

Details Preparation of onium hydroxides in an electrochemical cell Preparation of onium hydroxides in an electrochemical cell

C - Chemistry, Metallurgy

25

B

C25B 3/00 (2006.01) B01D 61/44 (2006.01) C07C 209/68 (2006.01) C07C 209/84 (2006.01) C07C 381/12 (2006.01) C07F 9/54 (2006.01) C07C 211/63 (2006.01)

Patent

CA 2264086

Electrochemically preparing onium hydroxides by (A) providing a cell comprising an anode (11), a cathode (12) and one or more unit cells between the anode and the cathode, each unit cell comprising: four compartments defined by, in sequence beginning at the anode, a bipolar membrane (13), a first divider (14) and a second divider (15), said bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode; (B) charging a solution of an onium salt to the compartment in each unit cell formed by the first and second dividers; (C) passing a current through the cell to produce an onium hydroxide in the compartment in each unit cell formed by one of the dividers on the anode side and a bipolar membrane on the cathode side; and (D) recovering the onium hydroxide.

Procédé de préparation d'hydroxydes d'onium, consistant (A) à utiliser une cellule électrochimique comprenant une anode (11), une cathode (12) et au moins une cellule entre l'anode et la cathode, chaque cellule comprenant quatre compartiments définis successivement en partant de l'anode, par une membrane bipolaire (13), une première séparation (14) et une seconde séparation (15), ladite membrane bipolaire présentant un côté anionique face à l'anode et un côté cationique face à la cathode; (B) à charger une solution de sel d'onium dans le compartiment de chaque cellule formé par la première et la seconde séparation; (C) à faire passer un courant à travers la cellule pour produire un hydroxyde d'onium dans le compartiment de chaque cellule formé par l'une des séparations du côté anode et par une membrane bipolaire du côté cathode; et (D) à récupérer l'hydroxyde d'onium.

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