The extraction of indium from aqueous halide and thiocyanate media by solutions of liquid anion exchangers in organic solvents
✍ Scribed by H.M.N.H. Irving; A.D. Damodaran
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 710 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
to postulate that InClss-and InCl$-are the predominant species. On the other hand, studies of the stability constants for the system indium(ITI)-halide ion gave values decreasing in the order KI > K2> K3 for chlorides, bromides and iodide9 and, if the trend were continued, the formation constant for, the species InX4-would be very low indeed and that for higher complexes still smaller. An alternative explanation6 is that indium(II1) tends to retain a coordination number of six, so that species such as InCh(H20)2-being more hydrophilic than the tetrahedral InC14-would favour the aqueous phase and so reduce the distribution ratios.
Studies with liquid anion exchangers can often yield information on the composition of the participating species but they have so far been limited to chloride systems and the results are conflicting. Thus WHITE, KELLY AND