Process for chlor-alkali electrolysis cell

Details Process for chlor-alkali electrolysis cell Process for chlor-alkali electrolysis cell

C - Chemistry, Metallurgy

25

B

204/160, 204/52.

C25B 1/46 (2006.01) C25B 9/00 (2006.01) C25B 15/00 (2006.01)

Patent

CA 1165272

ABSTRACT OF THE DISCLOSURE An improved process and apparatus for pH control and energy savings in chlor-alkali electrolysis cells is disclosed wherein a fuel cell type porous catalytic anode spaced from a separator is utilized to chemically oxidize a controlled, sub stoich etric amount of hydrogen to provide hydrogen ions to a recirculating anolyte. The pH is monitored and the flow of hydrogen fuel adjusted to provide a resultant desired pH in the range of about 2 to about 4. Optionally, hydrogen gas produced at the cell cathode may comprise the fuel supply and a porous catalytic cathode spaced from a separator may be employed for hydro- gen supply control and depolarization.

327613

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