Clean method for preparing high purity V2O5 from high acidity vanadium-containing solution using modified resin.

The demand for high purity V 2 O 5 was increasing, yet the V 2 O 5 preparation process was time-consuming, consumed a significant quantity of large alkali, and generated a considerable amount of neutralisation slag. This paper presents a novel method for preparing V 2 O 5 from complex and highly acidic vanadium-containing solutions without pH adjustment using modified resin. Under specific conditions of pH = 0.6, the adsorption percentage of V exceeded 99.8%. The 3 mol/L NaOH solution exhibited a desorption percentage for V above 99.7%. It was found that VO 2 + and VO 2 SO 4 − could chelate with the resin or be adsorbed by an electrostatic action. During desorption, the vanadium ion was converted from VO 2 + to VO 4 3−, which resulted in a sharp decline in the affinity with the resin. We proved that the method could selectively extract V at low pH. Our study made a valuable contribution to the environmentally responsible and sustainable development of the vanadium extraction industry, and it was a promising method for improving the adsorption system of complex solutions. [Display omitted] • The resin with high selectivity and good pH adaptability was prepared. • Efficient separation of V(V) without adjusting the pH of the solution. • Clean and short process to prepare high purity V 2 O 5. [ABSTRACT FROM AUTHOR]