C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 1/46 (2006.01) C25B 9/08 (2006.01) C25B 11/02 (2006.01) C25B 11/03 (2006.01)
Patent
CA 2114756
IMPROVED CELL HAVING A POROUS DIAPHRAGM FOR CHLOR-ALKALI ELECTROLYSIS AND PROCESS USING THE SAME ABSTRACT A chlor-alkali diaphragm electrolysis cells comprising pairs of interleaved anodes (B) and cathodes (C), said cathodes having surfaces provided with openings and coated by porous, corrosion resistant diaphragms, said cell further comprising feed brine inlets and outlets for the removal of the chlorine, hydrogen and caustic, said anodes being of the expandable type provided with internal extenders (F) and electrode surfaces with openings for the release of the produced gaseous chlorine, characterized in that the anodes (B) have at least one pressing means (O, Q) made of corrosion resistant material having elastic properties to maintain under constant and homogeneously distributed pressure the electrode surfaces of the anodes against the diaphragms. The anodes are preferably equipped with thin expanded meshes (M) fixed to each of the electrode surfaces facing the diaphragm and with hydrodynamic means (P) suitable for increasing the internal circulation.
Meneghini Giovanni
Traini Carlo
de Nora Permelec S.p.a.
Macrae & Co.
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