タングステン浸出残渣よりスカンジウムの回収
1975 年 91 巻 1047 号 p. 347-349
詳細
1975 年 91 巻 1047 号 p. 347-349
Various recovery processes of scandium from the waste residue of leached tungsten ore were examined.
After treatment of hydrochloric acid and ammonium thiocyanate, about 95% of scandium could be extracted into the diethyl ether. In the solvent extraction using tributyl phosphate, scandium was extracted from strong hydrochloric acid solution, then it was stripped into the aqueous solution with the recovery of 99.9%.
Sufficient extractions were not obtained with JM-T, because of the high impurity levels of products.
Impurities of the produced scandium compounds were eliminated by reprecipitation using ammonium tartaric acid.
Scandium oxide of 99.9% purity could be obtained from the produced scandium oxide by heating it to 800°C in a stream of hydrofluoric acid gas.
