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US 7,179,439 B2Granted
Method for preparing disodium paraperiodate
AssigneeSumitomo Chemical Company, Limited
InventorKouji Yoshikawa
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Abstract
It is provided that a method for preparing disodium paraperiodate, characterized in that a pH of a reaction mixture which is obtained by reacting sodium iodate, iodic acid or a mixture thereof with sodium hypochlorite using sodium hydroxide is adjusted to the range between 5 and 10.
Claims10
A method for preparing disodium paraperiodate, characterized in that a pH of a reaction mixture which is obtained by reacting sodium iodate, iodic acid or a mixture thereof with sodium hypochlorite in the presence of sodium hydroxide is adjusted to the range between 5 and 10.
A method for producing sodium metaperiodate comprising
- reacting sodium iodate, iodic acid or a mixture thereof with sodium hypochlorite in the presence of sodium hydroxide to obtain a reaction mixture and adjusting the pH of the reaction mixture to the range between 5 and 10 to form disodium paraperiodate, and
- contacting the disodium paraperiodate with an acid to adjust the pH of the resulting mixture to the range between 2 and 2.5.
Dependencies are inferred from the claim text.