METHOD FOR PRODUCTION OF SUCCINIC ACID AND SULFURIC ACID BY PAIRED ELECTROSYNTHESIS
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Sep 28, 2012
filing date -
Apr 1, 2010
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Abandoned
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Abstract
A method for the production of succinic acid and sulfuric acid by paired electrolytic synthesis is disclosed in the present invention. The method is described as following: in cathodic compartment of an electrochemical cell separated with cation exchange membrane, maleic acid or maleic anhydride is used as raw material, sulfuric acid as the cathodic reactant and the supporting electrolyte of the reaction system, succinic acid is thus synthesized by the electro-reduction reaction at cathode. In anodic compartment, the aqueous sulfuric acid solution containing iodide ion is used as electrolyte, iodide ion is anodized to form I2 and I3−. SO2 gas is fed into the circulated anolyte, reacting with I2 and I3− to form sulfuric acid and regenerate iodide ion. Simultaneously the evaporated hydroiodic acid and distilled water are returned to the anolyte circulation system. The cell voltage and the cost of production are reduced significantly.
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