October 2017, № 9 (209)

Ponomareva P.A. DETERMINATION OF EQUILIBRIUM PARAMETERS OF EXTRACTION OF IODINE BY MIXTURES OF EXTRACENTS OF VARIOUS NATUREComplex processing of poor mineral and hydromineral raw materials is a rather urgent task for today due to various reasons. The use of new sources of valuable components can be associated with the depletion of existing deposits, with the inability to process traditional raw materials due to geopolitical, economic, logistical or other reasons. Due to the fact that iodine does not form any significant deposits in the earth’s crust in the form of minerals, since it is a very mobile migrant, but tends to accumulate in groundwater near oil and gas condensate deposits, the use of the latter for iodine mining can be promising. Extraction extraction of iodine from reservoir and drilling waters of natural and technogenic origin is quite effective and economically advantageous. To study the extraction process, model aqueous solutions were used, which in composition are as close as possible to the composition of natural waters. The main equilibrium parameters of the extraction process were determined depending on the composition of the extraction composition. Mixtures of extractants of the aliphatic series — isooctane and cyclohexane and aromatic series — benzene and toluene were investigated. The mineralization of solutions was set by adding sodium chloride in the concentration range from 0 to 4 mol/l. The iodine content corresponded to the minimum industrial concentrations. The method of “isomolar series” and the method of “variable volumes” were used as the basic methods of investigation. In the course of the study, it was determined that, with an optimal ratio of organic and aqueous phases of 1 to 10, the greatest synergistic effect is achieved when using a mixture of extractants of aliphatic and aromatic series in a ratio of 7 to 3. The use of mixtures of this composition allows to achieve the greatest distribution coefficient and extraction ratio.Key words: iodine, extraction, synergetic effect, equilibrium, degree of extraction, distribution coefficient.

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References:

1. Ponomareva, PA Application of the method of isomolar series in the study of extraction of iodine from aqueous solutions with the composition TBP-isooctane [Electronic resource] / Vishnyakova K. Yu., Ponomareva P. A. // University complex as a regional center of education, science and culture : materials Всерос. scientific-method. Conf. (with international participation), 4-6 February. 2015, Orenburg / M-in education and science Ros. Federation, Feder. state. budget. educated. institution of higher education. prof. Education “Orenburg State Un-t.” — Electron. Dan. — Orenburg, 2015. — P. 1172-1176. — ISBN 978 5 7410-1180-5.

2. Ponomareva, PA Determination of physicochemical parameters of extraction of iodine by an organic solvent from aqueous solutions with different mineralization / PA Ponomareva, EV Stroeva, Yu. V. Gavryushenko // Proceedings of the III International Conference on Theoretical and Experimental chemistry. September 21-22. — Karaganda: “KarzGU Publishing House”, 2006. — P. 168-170.

3. Ponomareva, PA A study of the process of distribution of elementary iodine in an organic solvent-mineralized aqueous solution system / PA Ponomareva, EV Stroeva // XI International Scientific and Technical Conference “High Tech Chemical Technologies 2006” Samara, 2006, Tez. doc., T.1 — P. 220-221

4. Pat. 2326810 Russian Federation, IPC C01B 7/14, B01D 11/00. Method of extraction of iodine / Ponomareva PA, Stroeva EV, Kiekpaev M. A .; applicant and patent holder State Educational Institution of Higher Professional Education “Orenburg State University. — No. 2006132779/15; claimed. 12.09.2009; publ. 06.20.2008, Bul. № 17. — 4 with.

5. Ponomareva, PA Determination of thermodynamic parameters of extraction of iodine TBP in a mixture with isooctane from highly mineralized solutions / PA Ponomareva // Vestnik OSU. — 2011. — №6. — P. 419-420.

6. Robert M. Garrels, Charles L. Criest. Solutions, Minerals and Equilibria. –N.Y.,1965. -154-172 c .

7. Eigen V., Kustion K.// J.Am.Chem.Soc.1962. V.84.p.1355.

8. Beronius P., Brandstrom A. The ion pair formation of quaternary ammonium picrates in aqueous methylen chloride at 25C studied by conductivity and distribution// Acta Pharm. Sues. 1976. Vol. 30. P. 687–702.

9. Zhang, P. A solvent extraction process of the preparation of ultrahigh purity scandium oxide / P. Zhang, S. You, L. Zhang, S. Feng, Hou Songshou // Hydrometal lurgy1997.— V.47 №1 — P.47 — 56.

10. Woldman, G.M. Fundamentals of extraction and ion-exchange processes of hydrometallurgy / G.М. Voldman .— M .: Metallurgy, 1982.— 376 p.

11. Collins, A. G. Chemistry of some Anadarko basin brines containing high concentrations of iodide / A. G. Collins // Chemical Geology. 1969. Vol. 4, № 1/2 P. 169-187.

12. Gokhale A.S., Venkateswaren G. Solvent extraction cum radioanalytical method for iodine speciation: A revisit // Nucl. and Radiochem. Symp. -Visakhapatnam, 1992. P. 415-417.

13. Hanson M. W. Chloride, bromide, and iodide determination // J. Chem. Educ. 1961.-V. 38, №8.-P. 412.

14. Acree W.E., Bertrand G.L. Thermochemical investigations of nearly ideal binary solvents. 6. Solubilities of iodine and benzil in systems of nonspecific interactions // J. Solut. Chem. 1983. — V.12, № 2. — P. 401-413.

15. Solvent extraction behaviour of iodine and bromine in aqueous-organic systems, analogy with radioactive decay / N.K. Tunali, H.N. Erten, S. Ki-nikokoglu, Gumu? // J. Radioanal. Chem. -1979. V.49, № 2. — P.225-237.

About this article

Author: Ponomareva P.A.

Year: 2017

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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