Ammonium Metatungstate Production Method – Thermal Decomposition

Introduction

Thermal decomposition is one of production method to manufacture ammonium metatungstate, both liquid and solid status. Adding citric acid into ammonium paratungstate, heating the liquid after mixing and stirring under 200~280, boiling with ammonia until the AMT with content of 50%, the liquid AMT is produced. If the solid one is required, keep boiling until the volume to be 20% as the original one. After precipitating and filtering, the solid product is produced.