| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently separate platinum from a liquid to be extracted which contains tellurium together with platinum by bringing methyl isobutyl ketone into contact with the hydrochloric acid type liquid to be extracted in which the tellurium is dissolved together with the platinum to extract away the tellurium, then bringing a tributyl phosphate liquid into contact with the liquid to be extracted to extract the platinum. SOLUTION: The methyl isobuytyl ketone(MIBK) is used as the extracting liquid for the hydrochloric acid type liquid to be extracted in which the platinum and the Te are dissolved. The MIBK is brought into contact with the liquid to be extracted to extract the Te into the org. phase, by which the Te is separated from the liquid to be extracted of a water phase. The tributyl phosphate(TBP) is then brought into contact with the liquid to be extracted to extract the platinum. The MIBK is otherwise brought into contact with the liquid to be extracted in which Bi copper and Se are dissolved together with the platinum and the Te to extract away the Te and thereafter, the TBP liquid is brought into contact with the extracting liquid to extract the platinum and the Bi, by which both are separated from the copper and Se remaining in the liquid to be extracted. Further, the extracting liquid is washed with hydrochloric acid to migrate the Bi to the hydrochloric acid and to remove the Bi from the extracting liquid.</p> |
