Selective extraction of metal ions with polymeric extractants by

Details Selective extraction of metal ions with polymeric extractants by Selective extraction of metal ions with polymeric extractants by

1986-06-13

1987-05-12

Schofer, Joseph L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

210673, 210688, 423 24, 423 63, 423DIG14, 521 31, C22B 300

Patent

active

046647007

ABSTRACT:
The specification discloses a method for the extraction of metal ions having a reduction potential of above about +0.3 from an aqueous solution. The method includes contacting the aqueous solution with a polymeric extractant having primary phosphinic acid groups, secondary phosphine oxide groups, or both phosphinic acid and phosphine oxide groups.

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patent: 3943074 (1976-03-01), Dulog
"Synthesis of Diarylphosphine Oxides by the Friedel-Crafts Method," A. W. Frank, J. Org. Chem., 24, 966, (1959).
"Synthesis of Aromatic Phosphonic Acids and Their Derivatives," G. M. Kosolapoff et al., J. Am. Chem. Soc., 69, 2020 (1947).
"Actinide Extractants: Development, Comparison, and Future," R. R. Shoun et al., reprinted from ACS Symposium Series, No. 117 (1980).
"Synthesis of Phosphorus-Containing Wofatit Cation Exchangers and Their Affinity Toward Selected Cations", R. Bogoczek et al., J. Appl. Poly. Sci., 26, 4161 (1981).
Electron-Transfer Polymers (Oxidation-Reduction Polymers)", Harold G. Cassidy, Journal of Polymer Science-Part D (1972).

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