| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel distillation method in which a hydroxyl amine-containing organic solvent can safely as well as without decreasing the purity of the organic solvent obtained after the distillation, be distilled and recovered.SOLUTION: By adding aliphatic ketones of 3 to 8 carbon atoms to the organic solvent before or during distilling hydroxyl amine-containing organic solvent, the organic solvent can safely as well as without decreasing the purity of the organic solvent obtained after the distillation, be distilled and recovered. |
