Ion exchange method for preparation of tungstophosphoric acid

The possibility of ion-exchange production of phosphorotungstenic acid via the following two methods has been studied: according to method 1, a solution containing Na2WO4 and H3PO4 taken in the molar ratio of 12:15 is passed through an H-cationite according to method 2, phosphoro-tungstenic acid is obtained via sodium phosphoro-tungstenate. Advantages and drawbacks of both methods have been established