| abstract |
The present invention relates to a method for producing a high-purity quaternary ammonium salt, which is characterized by including: (1) to a quaternary ammonium salt containing a protic acid salt of a tertiary amine as an impurity, adding an oxide or hydroxide of a metal belonging to Groups 1 to 2 or Groups 12 to 13, so that the protic acid salt of the tertiary amine is neutralized by the oxide or hydroxide of the metal and converted into a tertiary amine and water, while the oxide or hydroxide of the metal is converted into a metal ion; and (2) removing the produced tertiary amine, water and metal ion from the reactive system. |