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INVENTION
Patent of the Russian Federation RU2082794
A METHOD FOR EXTRACTING VANADIUM FROM VANADIUM-CONTAINING SOLUTIONS
The name of the inventor: Efim Mikhailovich Rabinovich [RU]; Kozlov Vladlen Aleksandrovich [KZ]; Batrakov Larisa Khasanovna [KZ]; Tatyana Ivanovna Ostashko [KZ]; Tarabrin Gennady Konstantinovich [RU]; Biryukova Valentina Alexandrovna [RU]
The name of the patent holder: Institute of Metallurgy and Enrichment of the National Center for Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan (KZ)
Address for correspondence:
Date of commencement of the patent: 1995.04.28
The invention relates to the metallurgy of rare metals, namely to methods of extracting vanadium from vanadium-containing solutions by sorption. Summary of the invention: sorption of vanadium from solutions is carried out on highly basic anion exchangers in the presence of manganese, while maintaining the molar ratio of manganese to vanadium in the initial solution of 5-2.0: 1.0, which makes it possible to increase the sorption capacity of the resins by vanadium.
DESCRIPTION OF THE INVENTION
The invention relates to the metallurgy of rare metals, in particular to methods for sorption extraction of vanadium from vanadium-containing solutions.
A method for extracting vanadium from solutions by sorption on an inorganic oxyhydrate sorbent is known. The disadvantage of this method is the low sorption capacity of V 2 O 5 (Kazantsev, KA, Kudryavsky, Yu.P., Effect of sorption conditions on the extraction of vanadium from salt solutions by an inorganic oxyhydrate sorbent., Inorganic ion-exchange materials., 1980, pp. 62-63).
A method is known for extracting vanadium from a solution by sorption on weakly basic anion exchangers of AN-1, AN-2F EDE-10 II. The disadvantage of this method is the low sorption capacity of anion exchangers for V 2 O 5 . (Collection of works on chemistry // Edited by Bereimzhanova BA Alma-Ata, 1973, pp. 588-604).
The closest in technical essence to the proposed object is the method for extracting vanadium from solutions on highly basic anion exchangers such as AM, AM-n, BH-1. (Lishchenko, T. V. Vdovina, "Sorption of Vanadium and Silicon on Anionites, Giredmett Pipes," 74, 74-83, 74). The disadvantage is the insufficiently high sorption capacity of the resins according to V 2 O 5 (250 Mg / g).
The technical result of the invention is an increase in the sorption capacity of highly basic anion exchangers.
This is achieved in a process for the recovery of vanadium from vanadium containing solutions, including the sorption of vanadium on highly basic anion exchangers in the presence of manganese, while maintaining the molar ratio of manganese to vanadium in the initial solution equal to 0.5 2.0: 1.0.
The essence of the invention is as follows. In the process of sorption in the presence of manganese, the inactive amino groups of highly basic anion exchangers are activated, which begin to adsorb vanadium ions from the solution, due to which a large amount of vanadium ions is sorbed. This leads to an increase in the sorption capacity of highly basic anion exchangers in V 2 O 5 .
With a decrease in the molar ratio of manganese to vanadium in the initial solution, less than 0.5: 1.0 manganese will not be sufficient to activate the non-working amino groups of the highly basic anion exchangers, which will not additionally adsorb vanadium and this will lead to a decrease in the sorption capacity of anion exchangers according to V 2 O 5 .
With an increase in the molar ratio of manganese to vanadium in the initial solution of more than 2.0: 1.0, sorption of manganese ions takes place on the sorbent. Manganese ions occupy the capacity of the sorbent, which leads to a decrease in the sorption of vanadium from the solution and, accordingly, to a decrease in the sorption capacity of anion exchangers in V 2 O 5 .
Thus, the set of distinctive features of the invention, namely: sorption of vanadium on high-basic anion exchangers is conducted in the presence of manganese, while maintaining the molar ratio of manganese to vanadium in the initial solution equal to 0.5 2.0: 1.0.
Example 1 . 1.0 g of the AMP anion exchanger was contacted with 1.0 L of a vanadium solution containing 4.7 g / L vanadium in the presence of 2.53 g / L manganese. The molar ratio of manganese to vanadium in the initial solution is 0.5: 1.0. The sorbent was then separated by filtration.
As a result of the experiment, we obtained:
1.0 solution containing 4.354 g / l vanadium and 2.53 g / l manganese. 1.0 g of sorbent containing 346 mg / vanadium. The capacity of AMP for vanadium is 346 mg / g, which is 96 mg / g higher than the prototype (according to the prototype, the capacity of the sorbent is 250 mg / g).
Example 2 . 1 g of anionite AM-n was contacted with 1.0 L of a vanadium solution containing 1.38 g / L vanadium in the presence of 3.0 g / L manganese. The molar ratio of manganese to vanadium in the initial solution is 2.0: 1.0. (The vanadium-manganese solution was obtained by mixing, in a given molar ratio of manganese to vanadium, a pH solution from the leaching of converter slag and an acidic solution obtained from washing an insoluble residue of converter slag).
The sorbent was then separated by filtration.
As a result of the experiment, we obtained:
1.0 L of a solution containing 1.03 g / L vanadium, 3.0 g / L manganese.
1.0 g of AM-n sorbent containing 350 mg of vanadium. The vanadium capacity of AM-n is 350 mg / g of sorbent, which is 100 mg / g higher than the prototype (According to the prototype, the AM-n capacity is 250 mg / g.
Example 3 . 1.0 g of anionite VP-14k was contacted with 1.0 L of a vanadium solution containing 2.5 g / L vanadium in the presence of 4.2 g / L manganese. The molar ratio of manganese to vanadium in the initial solution is 1.55: 1.0. (The vanadium-manganese solution was obtained by mixing the pH solution from the leaching of converter slag and acidic drainage water in a predetermined ratio of manganese to vanadium).
The sorbent was then separated by filtration.
As a result of the experiment, we obtained:
1.0 L of a solution containing 2.144 g / L vanadium and 4.2 g / L manganese.
1.0 g of sorbent containing 356 mg of vanadium. Capacity VP-14 to vanadium is 356 mg / g sorbent, which is 106 mg / g higher than the prototype (according to the prototype capacity of the sorbent is 250 mg / g).
CLAIM
A process for the recovery of vanadium from vanadium-containing solutions, including the sorption of vanadium on highly basic anion exchangers, characterized in that sorption is conducted in the presence of manganese, while maintaining a molar ratio of manganese and vanadium in the initial solution of 0.5 2.0: 1.0, respectively.
print version
Date of publication 15.03.2007гг
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