Preparation method of high-purity vanadyl sulfate

Abstract

The invention relates to the technical field of flow battery energy storage, and further discloses a preparation method of the high-purity vanadyl sulfate. Specifically, the method comprises the stepsof using an alkaline vanadium-containing leachate and an unbalanced 3.5-valence solution as raw materials; matching and neutralizing the trivalent vanadium in the solution until the vanadium in the solution is tetravalent, using an alkaloid regulator for regulating the pH value of the solution to be neutral, promoting the tetravalent vanadium in the solution to be separated out, dissolving the precipitates reversely into a sulfuric acid aqueous solution, and introducing an organic precipitator, so that the vanadyl sulfate is subjected to accelerated crystallization in a new solution system, and the purity of obtained crystals is high. According to the preparation method of high-purity vanadyl sulfate, the alkaline vanadium-containing leachate and the unbalanced 3.5-valent vanadium solution are used as the main raw materials, so that the high-purity vanadyl sulfate can be conveniently extracted from the waste, the effect of waste recycling is effectively achieved, and the raw materialsof vanadyl sulfate are easier to obtain; the alkaloid regulators and organic precipitants are adopted for processing vanadyl sulfate, and a more scientific and simpler preparation method is conveniently adopted.

Description

technical field [0001] The invention relates to the technical field of liquid flow battery energy storage, in particular to a preparation method of high-purity vanadyl sulfate. Background technique [0002] The element symbol of vanadium is V, a silver-white metal, belonging to the VB group in the periodic table of elements, atomic number 23, atomic weight 50.9414, body-centered cubic crystal, common valences are +5, +4, +3, +2, the melting point of vanadium Very high, often called refractory metals together with niobium, tantalum, tungsten and molybdenum, ductile, hard and non-magnetic, has the ability to resist hydrochloric acid and sulfuric acid, and has better performance in gas, salt and water corrosion resistance than Most stainless steels are good. Metal vanadium in a dense state at room temperature is relatively stable, does not interact with air, water and alkali, and is resistant to dilute acids. Vanadium has been discovered twice. The first time was in 1801 by a p...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the invention provides a preparation method of high-purity vanadyl sulfate, which has the advantages of simple method, easy-to-obtain raw materials, low energy consumption, high purity of the obtained product and high economic benefits, and solves the problem of It needs to use conventional methods such as distillation to refine and produce it, which consumes a lot of energy, and the acquisition of raw materials is more troublesome, which increases its production cost and reduces its economic benefits.