D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/04 (2006.01) C25B 9/00 (2006.01) D21C 3/02 (2006.01) D21C 11/00 (2006.01) C02F 1/467 (2006.01)
Patent
CA 2166083
In a method for treating sulphide-containing white liquor in a continuously operating electrolytic cell (1) having separate anode and cathode compart- ments (2 et 3, respectively) separated by a partially permeable barrier (6), white liquor is introduced into the anode compartment (2) of the cell (1), and an aqueous solution of alkali metal hydroxide is intro- duced into the cathode compartment (3) of the cell (1), so that sulphide is oxidised in the anode compart- ment (2), while at the same time alkali metal cations are transported through the barrier (6) into the cathode compartment (3), where water reacts to form hydrox- ide ions. An electrolytic cell suited for implementing the method is also disclosed.
Selon un procédé permettant le traitement d'une liqueur blanche contenant du sulphure dans une cellule à électrolytique (1) à fonctionnement continu comprenant des compartiments anode et cathode distincts (2 et 3, respectivement) séparés par une cloison partiellement perméable (6), on introduit une liqueur blanche dans le compartiment anode (2) de la cellule (1), et une solution aqueuse d'hydroxyde métallique alcalin dans le compartiment cathode (3) de la cellule (1) de sorte que le sulphure est oxydé dans le compartiment anode (2), alors qu'au même moment des cations métalliques alcalins traversent la cloison (6) pour entrer dans le compartiment cathode (3) où l'eau réagit pour former des ions hydroxyde. L'invention concerne également une cellule à électrolytique appropriée pour la réalisation du procédé.
Hakansson Bo
Landfors Johan
Norell Maria
Eka Nobel Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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