Method for the preparation of alkali metal hydroxide

B - Operations – Transporting – 01 – D

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B01D 61/44 (2006.01) C01D 1/38 (2006.01)

Patent

CA 2138482

Procédé de fabrication d'hydroxyde de métal alcalin, selon lequel on met en oeuvre une cellule d'électrodialyse à trois compartiments, on fait circuler une solution aqueuse d'halogénure de métal alcalin dans un compartiment salin de la cellule, délimité entre une membrane anionique et une membrane cationique, on introduit un halogénure de métal alcalin dans un compartiment acide de la cellule, délimité entre la membrane anionique et une face cationique d'une membrane bipolaire et on extrait une solution aqueuse d'hydroxyde de métal alcalin d'un compartiment alcalin de la cellule, délimité entre la membrane cationique et une face anionique de la membrane bipolaire.

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