METHOD FOR REMOVING SULFATE ANIONS FROM AN AQUEOUS SOLUTION
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United States of America Patent
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Issued Date -
Jan 9, 2014
app pub date -
Jun 4, 2013
filing date -
Jun 4, 2012
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Abandoned
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Abstract
A method includes the steps, adding divalent calcium to an aqueous medium containing sulfate anions in solution and forming insoluble calcium sulfate in the aqueous medium; adding a water-soluble chitosan to the aqueous medium and forming a chitosan sulfate complex; adding a water-soluble anionic polymer to the aqueous medium to form aggregates comprising the chitosan sulfate complex with the anionic polymer; andremoving the aggregates from the aqueous medium to remove the sulfate anions.
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