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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3011
Title: Separations and recovery of indium and gallium using bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272)
Authors: Gupta B.
Mudhar N.
Singh I.
Published in: Separation and Purification Technology
Abstract: The extraction of indium(III) and gallium(III) along with the associated metal ions from hydrochloric acid medium by bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272) has been studied. The extraction profiles of indium(III) and gallium(III) have been investigated as a function of type and molarity of the acid, nature of organic diluent and concentration of the metal ion and the extractant. The extracting species have been identified as In(OH)R2, Ga(OH)R2 and H+GaCl4·2R. It has been possible to strip In(III) and Ga(III) from the organic phase by appropriate molarity of HCl. Conditions for a number of binary and ternary separations of analytical interest have been optimized. The developed conditions have been extended to recover pure In(III) from sphalerite and galena and Ga(III) from bottom ash and electronic waste. Loading capacity of the extractant was evaluated and the results reveal that Cyanex 272 can hold indium(III) up to one-fifteenth and gallium(III) up to one-twentieth of its molar concentration. The hydrolytic stability and regeneration capacity of the extractant has been assessed. © 2007 Elsevier B.V. All rights reserved.
Citation: Separation and Purification Technology (2007), 57(2): 294-303
URI: https://doi.org/10.1016/j.seppur.2007.04.011
http://repository.iitr.ac.in/handle/123456789/3011
Issue Date: 2007
Keywords: Cyanex 272
Gallium
Indium
Recovery
Solvent extraction separation
ISSN: 13835866
Author Scopus IDs: 7402195167
8254180900
57195320309
Author Affiliations: Gupta, B., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttranchal, India
Mudhar, N., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttranchal, India
Singh, I., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttranchal, India
Funding Details: The financial support to one of the authors by the Department of Science and Technology (DST), New Delhi, India is gratefully acknowledged. The authors are thankful to Cytec Canada Inc. for the gift samples of Cyanex 272. The instrumental facilities provided by CSIO (Chandigarh) and IIC (IIT Roorkee) for the analysis of the samples are acknowledged.
Corresponding Author: Gupta, B.; Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667 Uttranchal, India; email: bvgcyfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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