Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3029
Title: Recovery of cobalt, nickel, and copper from sea nodules by their extraction with alkylphosphines
Authors: Gupta B.
Deep A.
Singh V.
Tandon S.N.
Published in: Hydrometallurgy
Abstract: The paper describes a process for the recovery of pure Co(II), Ni(II), and Cu(II) from a hydrochloric acid solution of polymetallic sea nodules. An overnight contact of the nodule powder with 4 M HCl almost quantitatively leaches these metal ions. From the leachate, Co(II) and Cu(II) were recovered by their extraction with Cyanex 923 and Ni(II) by extraction with Cyanex 301. Co(II) and Cu(II) are partitioned in the organic phase as H2CoCl4·2 Cyanex 923 and CuCl2·2 Cyanex 923, whereas Ni(II) is extracted in the form of NiR2 (HR=Cyanex 301). A solution of 0.001 M H2SO4 is used for the stripping of Co(II) and Cu(II) and 5% NH4Cl in 75% NH3 for Ni(II). Both extractants are found to be stable toward prolonged contact with HCl and show negligible loss in their extraction capacity even after recycling them for 20 cycles. The partition data have been utilized in developing conditions for the separation of Co(II), Ni(II), and Cu(II) mutually and from other metal ions, namely Ti(IV), Al(III), Fe(III), Mn(II), and Zn(II). The procedure of separation thus developed has been extended for the recovery of around 90% Co(II), Ni(II), and Cu(II) from sea nodules. The purity of the metal ions thus obtained is around 99%. © 2003 Elsevier Science B.V. All rights reserved.
Citation: Hydrometallurgy (2003), 70(43833): 121-129
URI: https://doi.org/10.1016/S0304-386X(03)00052-5
http://repository.iitr.ac.in/handle/123456789/3029
Issue Date: 2003
Keywords: Cobalt
Copper
Cyanex 301
Cyanex 923
Liquid-liquid extraction
Nickel
Polymetallic sea nodules
ISSN: 0304386X
Author Scopus IDs: 7402195167
6602909701
55468431200
24523635700
Author Affiliations: Gupta, B., Department of Chemistry, Indian Institute of Technology, Roorkee, Uttranchal 247 667, India
Deep, A., Department of Chemistry, Indian Institute of Technology, Roorkee, Uttranchal 247 667, India
Singh, V., Department of Chemistry, Indian Institute of Technology, Roorkee, Uttranchal 247 667, India
Tandon, S.N., Department of Chemistry, Indian Institute of Technology, Roorkee, Uttranchal 247 667, India
Funding Details: The financial support of the University Grant Commission and the Council of Scientific and Industrial Research (New Delhi, India) is gratefully acknowledged. The authors are thankful to Cytec Canada Inc. for the gift samples of Cyanex 923 and Cyanex 301. Thanks are due to Dr. Shashi Anand of the Regional Research Laboratory (Bhubaneswar, India) for providing sea nodules. For the X-ray fluorescence analysis, the help of Dr. M.O. Garg, Indian Institute of Petroleum (Dehradun, India) is appreciated.
Corresponding Author: Gupta, B.; Department of Chemistry, Indian Institute of Technology, Roorkee, Uttranchal 247 667, India; email: bvgcyfcy@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.