Ammonium metatungstate (AMT) is a white or light yellow crystalline salt that is soluble in water. Generally, ammonium metatungstate solubility refers to the solubility of AMT in water. The data shows that at 20 °C, the solubility of AMT in water is 303.9g, and its solubility increases with increasing temperature. Besides, the aqueous solution of AMT is quite stable.

How to prepare high purity ammonium metatungstate crystal? The researchers proposed a method for preparing high-purity AMT crystals - neutralization-nanofiltration coupling process. This method can not only obtain a high concentration AMT solution to reduce the cost for the subsequent crystallization process, but prepare AMT with less impurity content to ensure the preparation of high purity ammonium metatungstate.

How to prepare ammonium metatungstate crystal? Or how to prepare AMT crystal? There are various preparation methods, such as thermal decomposition method, neutralization method, solvent extraction method, tungstic acid method, ion exchange method, etc.

What is ammonium metatungstate? Ammonium metatungstate, AMT for short, is a white or slightly yellow crystal powder that is soluble in water and insoluble in ethanol. AMT is an important intermediate compounds of tungsten hydrometallurgical process. Its chemical formula is (NH4) 6H2W12O40·XH2O, molecular formula is H8N2O4W, and molecular weight is 283.9145.