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Title:
SULFURIC ACID CONCENTRATION
Document Type and Number:
Japanese Patent JPS59208086
Kind Code:
A
Abstract:
A process is described for increasing the sulfuric acid concentration of solutions containing an alkali metal sulfate, sulfuric acid and alkaline earth metal ions. The solutions to be worked up are introduced into the anode compartment of an electrolysis cell. The anode compartment and the cathode compartment of the cell are each bounded by a cation exchange membrane. A center chamber is located between the two membranes. This center chamber is filled with an aqueous solution containing alkali metal ions. The concentration of alkaline earth metal ions in the solution in the center chamber must be kept below 5 mg/l during the electrolysis.

Inventors:
HAINTSU KAU
YURUGEN RUTSUSOU
Application Number:
JP8520484A
Publication Date:
November 26, 1984
Filing Date:
April 28, 1984
Export Citation:
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Assignee:
HOECHST AG
International Classes:
C25B1/22; D01F2/08; D01F13/02; (IPC1-7): C25B1/22; C25B7/00