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Abstrakty
Iridium(III) was extracted with Cyanex-923 and Cyanex-471X in toluene from bromide media and studied. The quantitative extraction was observed in the range of 5.0 - 6.0 M HBr with 1.0M Cyanex-923 and at 1.3 M Cyanex-471X in toluene, while metal ion was stripped out from organic phase of Cyanex-923 and Cyanex-471X with the mixture of 4.0 M HC1O4 + 2.0 M HNO3 and 6.0 M H2SO4 + 4.0 M HC1 respectively. In both the cases extraction of Ir(III) decreased with the increased concentration of stannous chloride. The thermal study showed that the extraction reactions are exothermic in nature with both the reagents, and the stoichiometric ratio of Ir(III) to Cyanex-923/Cyanex-471X in organic phase was 1:3. The separation of Ir(III) from Pt(IV), Pd(II), and Rh(III) has been also studied.
Czasopismo
Rocznik
Tom
Strony
21--25
Opis fizyczny
Bibliogr. 23 poz., tab., rys., wykr.
Twórcy
autor
- Inorganic Chemistry Laboratory, Applied Chemistry Division, Department of Chemical Technology, University of Mumbai, Matunga, Mumbai - 400 019, INDIA
autor
- Inorganic Chemistry Laboratory, Applied Chemistry Division, Department of Chemical Technology, University of Mumbai, Matunga, Mumbai - 400 019, INDIA
Bibliografia
- (1) Griffith W. P., The chemistry of rare platinum metals (Os, Ru, Ir, Rh), Interscience, New York, 1967.
- (2) Cleare M. J., Charlesworth P. and Bryson D. J., Solvent extraction in platinum group metal processing, J. Chem. Biotech., 1979, 29, 210.
- (3) Gindin L. M., Marinsky J. A. and Maarcus, Y. (Eds.), Solvent extraction of elementof platinum group, Ion Exch. and Sol. Ext., Dekker, NewYork, 1981, Vol. 8.
- (4) Kostanski M. T., Freiser H., Extraction of rhodium and iridium with a-(non-5yl) pyridine, Ana. Chim. Acta., 1991, 242, 191.
- (5) Hudson M. J. and Glaves L. R., The use of heterocyclic N-oxides in the separation of precious metals by solvent extraction, Chem. Ind., 1985, 22.
- (6) Sen K., Acharyya R. B., Siladitya B. and Bag S. P., Liquid-liquid extraction-separation of iridium in presence of rhodium and ruthenium with salicylhydroxamiic acid in iso-butanol, Indian J. Chem., (Sec. A), 1991, 30A, 437.
- (7) Hudson M. J. and Thorns J. F., The concentration of rhodium and iridium during the final stage of the platinum group metals refining process using the co-polymer poly[(N-dithiocarboxylato)- iminoethenehydrogenoimimoethene], Hydrometallurgy, 1983, 11, 289.
- (8) Yan G, L., Alstad J., Separation of Rhodium from Ruthenium and Iridium by fast solvent extraction with HDEHP, J. Radioanal. and Nucl. Chem., 1995, 196(2), 287.
- (9) Yan G. L., Alstad J., Solvent extraction of Rhodium, Ruthenium and Iridium with HDEHP, J. Radioana. and Nucl. Chem., 1995, 201(3), 191.
- (10) Fu J., Nakamura S. and Akiba K., Iridium (IV) transport across trioctyl amine supported liquid membrane, Sep. Sci. and Tech., 1995, 30(20), 3821.
- (11) American Cynamide Company, Cyanex 925 extractant, Wayne, New Gersey, USA, 1991.
- (12) Mojski M., Extraction of gold, palladium and platinum from chloride, bromide and iodide solution with di-n-octyl sulphide(DOS) in cyclohexane, Talanta, 1978, 25, 163.
- (13) Dreher T. M., Demopoulos, G. P. Precious metals, International precious metals, Institute, 1998, 22, 3. .
- (14) Shetker P. B., Gaud J. S. and Shinde V. M., Extraction of -gold(III)with triphenyl phosphine sulfide and subsequent spectrophotometric determination, Sep. Sci. and Tech., 1997, 32 (11), 1937.
- (15) Rickelton R. and Boyle J., Solvent extraction with organophosphines commercial and potential application, Sep. Sci. and Tech., 1988, 23, 1227.
- (16) Vogel A. I., A text book of quantitative inorganic analysis. 3rd ed. Longman London, 1975, 55.
- (17) Marczenko Z., Spectrophotometric determination of elements, Ellis Horwood Ltd. England, 1976.
- (18) Tertipis G. G. and Beamish, F. E., Solvent extraction, separation and spectrophotometric determination of Rhodium and Iridium, Anal. Chem., 1962, 34, 623.
- (19) San Gupta J., Arsenazo-III as a sensitive and selectivity reagent for the spectrophotometric determination of Palladium in iron and stony meteorites, Anal. Chem., 1967, 39, 18.
- (20) Westahd A. D. and Beamish F. E., Colorimetric determination of Iridium with p-nitrisodimethyaniline, Anal. Chem., 1955, 27, 1776.
- (21) Forrester J. S., Spectrophotometric determination of Rhodium with tin(II) chloride simultaneous determination of Rhodium and Platinum, Anal. Chem., 1955, 27, 1742.
- (22) Vest. P., Schuster M., Koenig K. H., Influence of SnCl2, on the solvent extraction of Platinum group metals with N-N-din-hexyl-N-benzoylthiourea, Fresenius J. Anal. Chem., 1991, 339(3), 142.
- (23). Mojski M., Extraction of Platinum metals from hydrochloric acid media with triphenylphosphinesolution in 1,2-dichloroethane, Talanta, 1980, 27, 7.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS3-0020-0032