Precipitation tests with 1.5 mol dm−3 oxalic acid (T = 298 K, t = 40 min).
| O/A phase ratio | Tb precipitation efficiency, % | La and Ce precipitation efficiency, % |
|---|---|---|
| 1 | 95 | 100 |
| 10 | 91 | 100 |
| 20 | 90 | >99.5 |
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