METHOD FOR CONCENTRATING AQUEOUS CAUSTIC ALKALI SOLUTION

摘要

METHOD FOR CONCENTRATING AQUEOUS CAUSTIC ALKALI SOLUTION of the disclosure: Heated substances, e.g. electrolytes or gases from electrodes, formed during electrolysis of an alkali halide in an electrolytic cell using a cation exchange membrane to separate anode and cathode chambers are used effectively as heat source for heating an aqueous caustic alkali solution to be concentrated in an evaporator.