Patent ID: 6337061
Filing Date: 2002-01-08
Classification: C01B,C01G,C22B,Y10S

Abstract:
A method for reclaiming a metal sulfate-containing waste sulfuric acid solution comprising the steps of extracting titanium ions from the waste sulfuric acid solution by contacting the waste sulfuric acid solution with an organic solvent effective for extracting titanium ions from the waste sulfuric acid solution; subjecting the waste sulfuric acid solution obtained after the step of extracting to a diffusive dialysis treatment; extracting titanium ions from the organic solvent used in the titanium-extraction by contacting the organic solvent with an alkali solution to extract the titanium and to convert it into an insoluble compound; and bringing the organic solvent obtained after extracting titanium therefrom into contact with the aqueous solution resulting from the diffusive dialysis treatment to extract the alkali ions from the organic solvent into the aqueous phase to regenerate the organic solvent.