C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 1/16 (2006.01) B01D 61/44 (2006.01) C01D 1/04 (2006.01) C01D 1/38 (2006.01)
Patent
CA 2217792
Process for manufacturing sodium hydroxide by electrodialysis of sodium carbonate in a three-compartment electrodialysis cell, whereby an aqueous sodium carbonate solution is fed into one cell compartment, which is contained between two cationic membranes; an acid is fed into one compartment, which is contained between one of the cationic membranes and a cationic face of a bipolar membrane; an aqueous sodium hydroxide solution is extracted from one compartment which is adjacent to an anionic face of the bipolar membrane.
Procédé de fabrication d'hydroxyde de sodium par électrodialyse de carbonate de sodium dans une cellule d'électrodialyse à trois compartiments, selon lequel on introduit une solution aqueuse de carbonate de sodium dans un compartiment de la cellule, qui est délimité entre deux membranes cationiques, on introduit un acide dans un compartiment, qui est délimité entre une des membranes cationiques et une face cationique d'une membrane bipolaire et on extrait une solution aqueuse d'hydroxyde de sodium d'un compartiment qui est adjacent à une face anionique de la membrane bipolaire.
Robic
Solvay (societe Anonyme)
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