| Budget Amount *help |
¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Outline of Final Research Achievements |
In order to develop effective extraction systems for rhodium in hydrochloric acid solution by using a synergistic effect, we investigated the extraction mechanism of rhodium in mixed solvent systems of sulfide-type and amine-type extractants. We analyzed the distribution behavior of rhodium between the organic extractant phase and hydrochloric acid solution, and the structure of the rhodium complexes extracted. As a result, the synergistic effect would stem from neutralization of a rhodium complex anion with the protonated amine-type extractants and substitution of the coordinated water of the rhodium by the sulfide-type extractant.
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