| 摘要 |
PROBLEM TO BE SOLVED: To achieve the easy removal of iodate salts as a reaction by-product in consideration of the difficulty in separation of by-products, namely iodic acid and iodate salts, from the objective compound. SOLUTION: A mixture of sulfonic acid represented by general formula (1) (R<1> SO3 )n M<1> (wherein R<1> is an alkyl, allyl, aryl, perfluoroalkyl; M<1> is H, an organic group, a mono-trivalent metal; n is an integer of 1-3), sulfinic acid of represented by general formula (1) (R<2> SO2 )m M<2> (wherein R<2> is an alkyl, allyl, aryl, perfluoroalkyl; M<2> is H, an organic group, a mono-trivalent metal; m is an integer of 1-3) and iodide compounds represented by general formula (3) M<3> X1 (wherein M<3> is H, ammonium, a mono-trivalent metal; X is iodine and l is an integer of 1-3) is oxidized, followed by removal of iodine whereby the sulfonic acid compound are purified.
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