Ammonium Metavanadate Fabricated by Selective Precipitation of Impurity Chemicals on Inorganic Flocculants

High purity ammonium metavanadate (NH4VO3) is the most vital chemical to produce V2O5, VO2, VN alloy, VFe alloy and VOSO4, which have some prospective applications for high strength steel, smart window, infrared detector imaging, large scale energy storage system. NH4VO3 usually produced by spontaneous crystallization from aqueous solution due its sharp dependence of solubility on temperature. However, hazardous chemicals in industrial effluent, include phosphorate, silicate arsenate, causing severe damage environment. In this work, these impurities are selectively precipitated onto inorganic flocculants, while vanadate dissolved an keeps almost undisturbed. Therefore, purified solution. By screening various flocculants precipitating parameters, polyaluminum sulfate with optimal amount 50 g/L, demonstrated remove corresponding removing efficiency 93.39%, 97.11% 88.31%, respectively. holds a 99.21%, comparison 98.33% product crude This purifying technology cannot only added value, but also reduce environmental pollution waste liquid.