Ammonium metatungstate decomposition temperature varies with the degree of completion of the decomposition reaction. This also means that ammonium metatungstate will produce different products at different decomposition temperatures.

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.

Ammonium metatungstate (AMT) is a white crystal powder or yellowish crystal powder with good water solubility, which can be used for preparation of diesel hydrogenation catalyst. For example, the researchers have proposed a method for preparing FCC diesel hydrorefining catalyst by using ammonium metatungstate as an active component.

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.