| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for refining an iminophosphazenium hydroxide-containing solution that can efficiently remove impurities from an iminophosphazenium hydroxide-containing solution including impurities.SOLUTION: The method for refining an iminophosphazenium hydroxide-containing solution is performed through at least steps (1) to (3) as given below: step (1): a step of bringing an iminophosphazenium hydroxide contained in a solution into contact with a halogenated hydrocarbon to form a halogenated iminophosphazenium; step (2): a step of performing solvent substitution of the halogenated iminophosphazenium solution produced in the step (1) to precipitate the halogenated iminophosphazenium and then recovering a refined halogenated iminophosphazenium by filtration; and step (3): a step of dissolving the refined halogenated iminophosphazenium recovered in the step (2) in an organic solvent and then bringing a refined halogenated iminophosphazenium solution into contact with a basic substance to form an iminophosphazenium hydroxide.SELECTED DRAWING: None |
