Ammonium Metatungstate Production Method – Tungsten Acid

מבוא

The production method of tungsten acid to produce ammonium metatungstate is applied ammonia to dissolute tungsten acid. The detail process is adding dissoluted ammonium tungstate into boiled de-ionized water, making the fluid PH 8 after stirring, decreasing the PH again after adding acetic acid, and stopping heating when the density is 1.5~2g/cm3. After cooling and filtering, adding ethanol to precipitate, AMT is produced after drying and crushing.