Claims
- 1. A process for removing and recovering metal selected from the group consisting of Mn, Ca, and Mg and mixtures thereof from the aqueous sulfate solution thereof comprising
- contacting said aqueous sulfate solution with an extractant solution comprising a metal extractant diluted in a liquid hydrocarbon,
- wherein said metal extractant is a substituted phosphonic acid monoester, in which the substituted moiety is a 1-octyl group, and in which a straight-chained 1-octyl group is employed as the ester group of the phosphonic acid monoester;
- whereby the concentration of the metal in the aqueous sulfate solution decreases, and whereby the concentration of the metal in the extractant solution increases,
- separating the extractant solution having increased metal concentration from the aqueous sulfate solution having decreased metal concentration, and
- recovering said metal from the extractant solution, so that the metals can be removed from the aqueous solutions to be treated without neutralizing the quantity of acid which is generated during the extraction.
- 2. The process of claim 1 wherein the extraction temperature ranges between 20.degree.-60.degree. C.
- 3. The process of claim 1 wherein an organic phosphate is added to the extractant solution.
- 4. The process of claim 3 wherein the organic phosphate is tributyl phosphate.
- 5. The process of claim 1 wherein a C.sub.8 -C.sub.12 alcohol is added to the extractant solution.
- 6. The process of claim 1 wherein the metal is Mn.
- 7. The process of claim 1 wherein the metal is Ca.
- 8. The process of claim 1 wherein the metal is Mg.
Priority Claims (1)
Number |
Date |
Country |
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842668 |
Jul 1984 |
FIX |
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Parent Case Info
This application is a division of co-pending application Ser. No. 07/096,245, filed Sept. 8, 1987, now U.S. Pat. No. 4,818,503 which is a continuation of application Ser. No. 746,732, filed Jun. 20, 1985, now abandoned.
US Referenced Citations (10)
Non-Patent Literature Citations (3)
Entry |
Hurst et al, Ind. Eng. Chem. Process Des. Develop. |
Murthy, "Study of Some Phenyl Phosphoric Acids for Extraction of Uranium from Phosphoric Acid". |
Y. Marcus et al, "Ion Exchange and Solvent Extraction of Metal Complexes". |
Divisions (1)
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Number |
Date |
Country |
Parent |
96245 |
Sep 1987 |
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Continuations (1)
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Number |
Date |
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Parent |
746732 |
Jun 1985 |
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