METHOD FOR OBTAINING THE TETRAMETHYLAMMONIUM HYDROXIDE Russian patent published in 2018 - IPC C25B3/00 C25B1/00 C07C211/63 

FIELD: chemistry.

SUBSTANCE: invention refers to the method of preparation of the tetramethylammonium hydroxide solution, which consists in the fact that the electrodialysis of tetramethylammonium chloride is carried out in the five-chamber electrodialysis apparatus with ion-exchange membranes. Process is characterized by the fact that tetramethylammonium chloride is taken as a 30–45 wt% solution in methanol at the cathodic current density of 1–2 A/dm² and at the temperature of 20–30 °C, 1.0 M aqueous sodium hydroxide solution is placed in the cathode space of the electrodialysis apparatus, the cathode chamber is separated by the anion exchange membrane, 1.0 M aqueous solution of sulfuric acid is placed in the anode space, and 0.2 wt% methanol solution of pure tetramethylammonium hydroxide is placed in one of the intermediate chambers, the electrodialysis process is carried out during 6 hours.

EFFECT: proposed method allows to obtain the tetramethylammonium hydroxide without presence of water.

1 cl, 4 ex, 2 dwg