Ammonium Metatungstate Applied for Catalyst

Ammonium metatungstate (AMT) is an important tungsten-containing compound that can be used as a catalyst in petroleum cracking, organic synthesis, and nitrification reactions. Nowadays, with the rapid development of petroleum refining and petrochemical industries, AMT is more and more popular. Therefore, how to obtain AMT with advantages of low impurity content, stable quality, good solubility, high WO3 content and low cost has become the priority of the current task.

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In this regard, the researchers proposed a method for preparing ammonium metatungstate catalyst. They used ammonium paratungstate as a raw material, and AMT with low impurity content, high purity and high solubility was available after dissociation, leaching, clarification, concentration, spraying and other steps. Wherein, the dissociation adopts heating and calcining while introducing rare gas; using pre-treated diatomaceous earth for clarification, and the clarification tank is improved into a three-step clarification tank.

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