Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Rare earth metal
Patent
1996-03-19
1997-06-17
Bos, Steven
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Rare earth metal
C01F 1700
Patent
active
056394330
ABSTRACT:
A method is disclosed whereby rare earth elements are extracted from acidic solutions thereof using, as an extractant, a mixture of an alkyl (C.sub.4 -C.sub.12) phosphinic acid or salt and an alkyl (C.sub.4 -C.sub.12) or aryl phosphonic acid or ester thereof.
REFERENCES:
patent: 4647438 (1987-03-01), Sabot et al.
patent: 4927609 (1990-05-01), Leveque et al.
patent: 5015447 (1991-05-01), Fulford et al.
Ma Hengli
Yuan Chengye
Bos Steven
Cytec Technology Corp.
Van Riet Frank M.
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