C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/78.1
C25B 1/24 (2006.01) C25B 1/26 (2006.01) C25B 9/00 (2006.01) C25B 15/00 (2006.01)
Patent
CA 1160983
ABSTRACT OF THE INVENTION In a method for electrolyzing hydrochloric acid in an electrolysis apparatus, the improvement which comprises the electrolysis apparatus comprising at least two electrolysis cells, each electrolysis cell having at least one anode, at least one cathode and at least one cation exchange membrane therebetween to define an anode compartment and a cathode compartment therein, and the method comprising the steps of (a) feeding hydrochloric acid aqueous solution as a starting material into the anode compartment of a first electrolysis cell and electrolyzing the hydrochloric acid aqueous solution therein, (b) feeding hydrochloric acid aqueous solution discharg- ed from the anode compartment of the first electrolysis cell into the anode compartment of a second electrolysis cell and electrolyzing the hydrochloric acid aqueous solution therein, (c) feeding hydrochloric acid aqueous solution discharg- ed from the anode compartment of the last electrolysis cell of the electrolysis apparatus into the cathode compartment of each of the electrolysis cells in the electrolysis apparatus, (d) and further, for any additional electrolysis cells present in addition to the first and the second electrolysis cells, subsequent to step (b) and prior to step (c), sequential- ly feeding hydrochloric acid aqueous solution discharged from the anode compartment of a preceding electrolysis cell into the anode compartment of a subsequent electrolysis cell and electrolyzing the hydrochloric acid aqueous solution therein.
343867
Kosaka Shohei
Satoh Hitoshi
Chlorine Engineers Corp. Ltd.
G. Ronald Bell & Associates
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