Saint Petersburg State Technological Institute (Technical University), Saint Petersburg, Russia:

E. V. Moskalyuk, Student of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”
A. A. Blokhin, Professor of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”, e-mail: blokhin@list.ru
Yu. V. Murashkin, Assistant Professor of a Chair “Technology of Rare Elements and Nanomaterials on their Basis”

Representation of Purolite Ltd in CIS, Moscow, Russia:
M. A. Mikhaylenko, Head of Hydrometallurgy Line

We investigated the sorption of vanadium (V) and vanadium (IV) from 0,4 M solution of sodium sulfate at different pH values. The following anion exchange resins were used in the work: strong base anion exchange resins Purolite A500/2788 and Purolite PFA600/4740, weak base anion exchange resins Purolite A111 with tertiary, Purolite S984 with secondary and primary amino groups and Purolite S108 with the N-glutamine groups. All the tested anion exchange resins showed ability to uptake vanadium (V); and dependence of loading rate on the pH of solutions had a dome shape. The maximum loading of vanadium (V) was achieved at pH = 3.0–3.5. The sorption behavior of vanadium (IV) in regards of pH variation was similar to the behavior of vanadium (V). The main differences between vanadium (V) and vanadium (IV) at sorption on anion exchange resins consisted in the fact that vanadium (IV) was absorbed in a more narrow range of pH solutions and less completely than vanadium (V). We proposed the preoxidation of vanadium (IV) to vanadium (V) before its sorption from real solutions. Isotherms of sorption of vanadium (V) on A500 and A111 resins were investigated. Both anion exchangers have similar vanadium capacities. Iron (III) (in the range of its concentrations) from 1 to 5 g/L has no significant effects on the anion exchange sorption of vanadium (V). Vanadium (V) can be effectively eluted from the weak base A111 resin by solutions of sodium or ammonia hydroxide, but elution of vanadium from strong base A500 resin requires application of alkaline solutions of salts, such as sodium or ammonia chloride, or nitrate. Vanadium capacity of the A111 resin in dynamic experiment reaches 121.7 g/L of swollen resin at sorption from the modeling solution comprising of 0.3 mol/L Na₂SO₄, 1.6 g/L vanadium (V), 2.2 g/L iron (III), 2.1 g/L aluminum, having pH = 2.0. At least 99% of vanadium can be stripped from the loaded resin by aqueous ammonia.

1. Reznik A. M., Baykonurova A. O. Extraction methods of vanadium recovery. Ekspress-informatsiya. 1979. Series 7, No. 90 (724). 32 p.
2. Lozano L. J., Godnez C. Comparative study of solvent extraction of vanadium from sulphate solutions by primene 81R and alamine 336. Minerals Engineering. 2003. Vol. 16, No. 3. pp. 291–294.
3. Chagnes A., Rager M. N., Courtaud B., Thiry J., Cote G. Speciation of vanadium (V) extracted from acidic sulfate media by trioctylamine in n-dodecane modified with 1-tridecanol. Hydrometallurgy. 2010. Vol. 104, No. 1. pp. 20–24.
4. Xingbin Li, Chang Wei, Zhigan Deng, Minting Li, Cunxiong Li, Gang Fan. Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP. Hydrometallurgy. 2011. Vol. 105, No. 3–4. pp. 359–363.

5. Kasikov A. G., Petrov V. N., Petrova A. M. Method of vanadium extraction from acid solutions. Patent RF, No. 2492254, IPC C 22 B 34/22. Applied : 29.06.2012. Published: 10.09.2013. Bulletin No. 25.
6. Laskorin B. N., Nikulskaya G. N., Maurina A. G. Influence of structure of macroporous sorbents on their sorption properties during the extraction of polymeric metal ions. Hydrometallurgy. Autoclave leaching, sorption, extraction. Ed.: B. N. Laskorin. Moscow : Nauka, 1976. pp. 86–96.
7. Li Zeng, Qinggang Li, Liansheng Xiao. Extraction of vanadium from the leach solution of stone coal using ion exchange resin. Hydrometallurgy. 2009. Vol. 97, No. 3–4. pp. 194–197.
8. Jinwen Huang, Peng Su, Wenwei Wu, Sen Liao, Huiquan Qin, Xuehang Wu, Xiaohu He, Liujia Tao, Yanjin Fan. Concentration and separation of vanadium fromalkalinemedia by strong alkaline anion-exchange resin 717. Rare Metals. 2010. Vol. 29, No. 5. pp. 439–443.
9. Li Zeng, Qinggang Li, Lianshen Xiao, Qixiu Zhang. A study of the vanadium species in an acid leach solution of stone coal using ion exchange resin. Hydrometallurgy. 2010. Vol. 105, No. 1–2. pp. 176–178.
10. Troshkina I. D., Balanovskiy N. V., Nve Shvan U, Shilyaev A. V. Sorption of vanadium (V) from sulfuric-acid solutions by nanostructured nitrogencontaining ionites. Tsvetnye metally. 2013. No. 11. pp. 62–65.
11. Wang Li, Yimin Zhang, Tao Liu, Jing Huang, Yi Wang. Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuric acid leach solutions of stone coal. Hydrometallurgy. 2013. Vol. 131–132. pp. 1–7.
12. Soldi T., Pesavento M., Alberti G. Separation of vanadium (V) and- (IV) by sorption on an iminodiacetic chelating resin. Analytica Chimica Acta. 1996. Vol. 323, No. 1–3. pp. 27–37.
13. Busev A. I., Tiptsova V. G., Ivanov V. M. Guidance of analytical chemistry of rare metals. Moscow : Khimiya, 1978. 432 p.
14. Pop M. S. Heteropoly- and isopolyoxometallates. Novosibirsk : Nauka, Siberian Department, 1990. 232 p.
15. Li Zeng, Chu Yong Cheng. A literature review of the recovery of molybdenum and vanadium from spent hydrodesulphurisation catalysts. Part II: Separation and purification and references within. Hydrometallurgy. 2009. Vol. 98, No. 1–2. pp. 10–20.