Method and apparatus for electrically increasing sulfuric...

Details Method and apparatus for electrically increasing sulfuric... Method and apparatus for electrically increasing sulfuric...

C - Chemistry, Metallurgy

01

B

204/123, 204/58

C01B 17/88 (2006.01)

Patent

CA 1066655

ABSTRACT An improved method is provided for concentrating aqueous sulfuric acid solution of concentration greater than about 75 weight per cent H2S04 by electrolysis in an electro- lytic cell wherein platinum electrodes are utilized without the build-up of sulfur deposits thereon. To achieve this end, persulfate ions are provided in the solution and the electrodes are placed in sufficient proximity to one another and sufficient mixing is provided in the solution so that a substantial quantity of persulfate ions are conveyed into the region surrounding the cathode. In an integrated system, drying of a wet fluid stream on a continuous basis is effected by contacting it with concentrated sulfuric acid and purify- ing and recycling the sulfuric acid by the method of this invention, only a small inventory of the sulfuric acid being required.

236417

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