Dissolve ammonium paratungstate in appropriate amount of water to prepare a solution of certain concentration.
Add sodium hydroxide (NaOH) slowly in the solution, and keep stirring until the PH value of the solution reaches about 8-9.
The reaction solution is precipitated, filtered, washed to neutral, and the product is dried to obtain ammonium metatungstate.
Ammonium metatungstate is a derivative of ammonium paratungstate. Its chemical formula is H5NaO4W12. It is a white solid. It can be used as an important raw material for catalyst and material chemistry, and has broad application prospects. It should be noted that safety protection should be paid attention to during the preparation process, such as wearing protective clothing, gloves, goggles, etc., to prevent accidental injury of chemicals.
