| 摘要 |
PURPOSE:To improve the purity without requiring special apparatuses, by bringing 1,3-dichloroacetone containing trichloroacetone into contact with water under specific conditions in purifying the 1,3-dichloroacetone to give the titled compound useful as an intermediate for medicines, germicides, etc. CONSTITUTION:1,3-Dichloroacetone containing trichloroacetone is brought into contact with water in the presence of a weak acid salt, preferably at least one salt selected from carbonate, bicarbonate, acetate, formate and oxalate of an alkali metal or an alkaline earth metal usually at 0-150 deg.C preferably 20-100 deg.C to purify the titled compound. The equivalent amount of the alkali compound to be used as an aqueous solution or suspension is 1-10 times, preferably 2.4-5 times that of the titled compound. The concentration of the compound is preferably 0.5-20wt%. The amount of water to be used for contact treatment is 0.1- 4 times that of the material to be treated.
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