Method and apparatus for processing waste sulfuric acid
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United States of America Patent
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Nov 14, 1995
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N/A
app pub date -
Jun 17, 1994
filing date -
Sep 24, 1991
priority date (Note) -
Expired
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Abstract
A method for processing waste sulfuric acid which is contaminated with halides and has an acid content up to 40% which comprises subjecting the waste sulfuric acid to an electrodialysis in which the electric field causes the univalent halides to permeate through an anion exchange membrane and to be selectively removed while the divalent sulfate ions of the sulfuric acid are substantially retained, the sulfuric acid leaving the electrodialyzer being almost entirely free of halides. A corresponding apparatus is also provided.
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