Preparation of sodium tungstate or ammonium tungstate: reacting tungstic acid with sodium hydroxide or ammonia to obtain sodium tungstate or ammonium tungstate.
Preparation of paratungstic acid: reaction of sodium tungstate or ammonium tungstate with cuprous oxide to obtain paratungstic acid.
Preparation of ammonium paratungstate: reaction of paratungstic acid with ammonia water to obtain ammonium paratungstate.
During the preparation process, it is necessary to pay attention to reaction conditions, raw material quality, equipment selection and maintenance and other factors to ensure product quality and output.
