A method for extracting and separating vanadium in aqueous solution

Abstract

A method for extracting and separating vanadium in aqueous solution, which mainly comprises mixing non-ionic surfactant, vanadium-containing aqueous solution, saline solution and deionized water, the concentrations of which are respectively 50-200g / L, 0.5-30g / L, 50- 100g / L, adjust the pH value to 1~3, stir it at 25~80°C for 10~60min, stand still and separate the phases for 10~60min, the upper phase is the nonionic surfactant phase loaded with vanadium, and the lower phase is water Phase two-phase system, adding ammonium sulfate, ammonium nitrate or ammonium chloride aqueous solution to the loaded vanadium surfactant phase, so that the ratio of the vanadium-loaded nonionic surfactant phase (O) to the aqueous phase (A) is 1 to 5, adjust the pH value to 8 to 10 with ammonia water, and then place it in a constant temperature water bath at 25 to 80°C for precipitation for 10 to 60 minutes. The invention has fast extraction rate, good phase separation, no formation of third phase and no emulsification problem, non-toxic and harmless to the environment, complete phase separation of the two-phase system, vanadium extraction rate of over 95%, and ammonium metavanadate precipitation rate Reach more than 90%.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for extracting vanadium. Background technique [0002] Vanadium is known as a "strategic metal", and this reputation is inseparable from its wide range of uses and outstanding advantages. Most of the vanadium in our country is applied to the steel industry, and the purpose of improving its strength and toughness is achieved by adding an appropriate amount of vanadium to the steel. [0003] Vanadium compounds can be applied to some special industries, and can also be applied to medicine, such as the production of stimulants, the production of spectacle lenses and the production of dental materials. Vanadium batteries have the advantages of good discharge performance, short charging time, long cycle life, and low cost. They are also widely used in battery production, and are especially suitable for large-scale static energy storage materials. The application of vanadiu...

AI Technical Summary

Problems solved by technology

However, various processes for separating and extracting vanadium from vanadium materials have certain disadvantages, such as high energy consumption, heavy pollution, complex processes, and low product purity.