| 摘要 |
FIELD: chemical technology. SUBSTANCE: acid solutions with acidity 0.4-4.0 N which contains rare-earth elements (initial content of rare-earth elements in them being up to 2 g/l) and Ca, Sr, Al, Fe, Ti and others are treated by collecting agent. Dialkyl phosphoric acids having 7-14 carbon atoms are used as said collecting agent. The process is carried out by intense mixing of the solution and by uninterrupted bubbling it with air or with other gas being inert in relation to said solution. Expense of said collecting agent is 3-6 moles per 1 mole of rare-earth element. Said agent may be heated to temperature not more 100 C. EFFECT: improves efficiency of the method. |
