
Researchers have proposed a method for producing ammonium paratungstate using tungsten-contained waste material, which has the advantages of short production process. Evaporated and crystallized waste ammonia gas and wastewater can be recycled and reused. And it significantly reduces emissions of waste gas and wastewater. Also, it improves the tungsten recovery rate. More details, please visit: http://ammonium-paratungstate.com/index.html A Method for Producing Ammonium Paratungstate Using Tungsten-contained Waste Material Step One: Acid leaching and removing impurities from tungsten-contained waste material (containing metal tungsten…