A Convenient Method to Prepare Alkali- and Chloride-free Ammonium Metavanadate (NH4VO3)

Abstract A convenient method for the preparation of alkali- and chloride-free ammonium metavanadate has been developed. This new process is utilizing a hydrothermal reaction of vanadium pentoxide with ammonium hydroxide or ammonium carbonate for 2 h at 120 °C in a teflon-lined stainless steel autoclave. The yields are 78 and 82%, respectively.