| Autor: |
Rossmanith, Kurt, Unfried, Peter |
| Zdroj: |
Chemical Monthly / Monatshefte für Chemie; 1986, Vol. 117 Issue 10, p1165-1176, 12p |
| Abstrakt: |
1.6 kg of yttrium earth mixtures (4-6% Er) were concentrated to 60% erbium oxide by repeated Craig-distributions with 4 M HNO lower phase for separation of yttrium, and with 11 M for separation of holmium and thulium. During these experiments the optimal conditions were studied with regard to acidity and input. The 60% ErO was further purified by using 4 M followed by 11 M HNO lower phase several times. There resulted nearly 20 g ErO 99.9% pure. The concept of the effective distribution coefficients characterising preparative Craig-distributions was further verified by discussion of the values of selected separations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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