![How to Prepare Ammonium Metatungstate from Waste Tungsten Oxide? ammonium metatungstate photo](http://www.ctia.com.cn/en/wp-content/uploads/2021/03/How-to-prepare-ammonium-metatungstate-from-tungsten-oxide-waste-2-351x185.jpg)
In the existing technology, using waste tungsten oxide (WO3) as a raw material, only low value-added ammonium paratungstate (APT) can be obtained, and high value-added ammonium metatungstate (AMT) products cannot be obtained. Moreover, WO3 waste ammonia after leaching, APT is needed to crystallize, so a crystallization reactor is necessary, and the investment in crystallization reactor equipment is relatively large, resulting in higher production costs and poor economic benefits, and the recovery rate of WO3 waste is low. Therefore, it is…