| 摘要 |
<p>PURPOSE: An aluminum back-extraction method and an aluminum removal method are provided to selectively extract aluminum with high efficiency by controlling equilibrium pH to 2-2.3 so that manganese is not extracted along with aluminum. CONSTITUTION: An aluminum back-extraction method is as follows. An acid solution is added to organic solvent including aluminum and equilibrium pH is controlled to 0-0.5 so that aluminum is extracted back into an acidic solution. The organic solvent is extracted from a sulfuric acid solution including at least aluminum. [Reference numerals] (AA) Extracts; (BB) Mn extracts; (CC) Co extracts; (DD) Ni extracts; (EE) Li extracts; (FF) Al extracts</p> |
