Method for extracting and separating vanadium from aqueous solution

Abstract

Provided is a method for extracting and separating vanadium from an aqueous solution. The method mainly comprises the steps that a non-ionic surface active agent with the concentration being 50-200 g / L, the vanadium-bearing aqueous solution with the concentration being 0.5-30 g / L, a saline solution with the concentration being 50-100 g / L and deionized water are mixed, the pH value is adjusted to be 1-3, the mixture is stirred for 10-60 min at the temperature of 25-80 DEG C, standing for phase splitting is conducted for 10-60 min, and a dual-water-phase system with the upper phase being the vanadium-bearing non-ionic surface active agent phase and the lower phase being the water phase is obtained; and an ammonium sulfate or ammonium nitrate or ammonium chloride aqueous solution is added to the vanadium-bearing surface active agent phase, the ratio of the vanadium-bearing non-ionic surface active agent phase (O) to the water phase (A) is 1-5, the pH value is adjusted to be 8-10 with ammonium hydroxide, and then the mixture is put into a constant-temperature water path boiler with the temperature being 25-80 DEG C to settle for 10-60 min. The method is high in extraction speed, phase separation is good, a third phase and emulsification are both avoided, the method is nontoxic and harmless relative to the environment, the dual-water-phase system is complete in phase splitting, the extraction rate of vanadium reaches 95% or over, and the deposition rate of ammonium metavanadate reaches 90% or over.

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.