Extraction Recovery of Vanadium(V) by Amines

Lyudmila D Kurbatova,Olga V Koryakova,Marina S Valova

doi:10.18502/kms.v6i1.8083

Abstract

   The extraction of vanadium (V) by N-(2-hydroxy-5-nonylbenzyl)-β, β- dihydroxyethylamine was studied depending on different factors, such as pH of the medium, concentration of extracting agent, temperature and solvent type. This allowed the optimal extraction conditions to be determined. It was shown that extraction of vanadium (V) takes place with high distribution coefficients, and a complex containing a decavanadate anion and four molecules of the extractant is formed in the organic phase. The extracted vanadium (V) complex with amine is stable for more than one month. Keywords: extraction, vanadium, distribution coefficient, infrared spectroscopy  

Highlights

Analysis of available technologies for vanadium recovery shows that neither of them meets in full measure the modern product quality, metal extraction completeness and ecological cleanliness requirements
Neutral extractants recover vanadium in the oxidation state five from concentrated solutions of hydrochloric acid. Their application is not effective enough since in concentrated solutions of hydrochloric acid co-extraction of hydrochloric acid and reduction of vanadium (V) to vanadium (IV) can take place. This decreases the degree of vanadium (V) extraction
Di-2-ethylhexylphosphoric acid is a cation-exchange extracting agent, which is used in technology only for extraction of vanadium in the oxidation state four [1, 2]

Summary

Introduction

In this work we present the results of investigation of vanadium (V) extraction from subacid solutions by phenol-type amine N-(2-hydroxy-5-nonylbenzyl)-β, β-dihydroxyethylamine (NBEA). The extraction of vanadium (V) by phenol-type amine N-(2-hydroxy-5-nonylbenzyl)β, β-dihydroxyethylamine was examined. The studies performed revealed that extraction of vanadium (V) by phenol-type amine should be carried out in a subacid region.

Results

Conclusion