Method of preparing fluorine-free rare earth metal compounds fro

Details Method of preparing fluorine-free rare earth metal compounds fro Method of preparing fluorine-free rare earth metal compounds fro

1976-07-21

1977-09-27

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Rare earth metal

75101BE, 2604292, 423263, 423489, C01F 1700

Patent

active

040512193

ABSTRACT:
A rare earth metal salt containing fluorine ions is separated from an acidic solution of the salt in the presence of an amount of boric acid sufficient to sequester the fluorine ions whereby the fluorine ions are bound in the solution and fluorine-free rare earth metal salt is recovered from the solution.

REFERENCES:
patent: 1314571 (1919-09-01), Hafner
patent: 2805928 (1957-09-01), Kasey
patent: 2995913 (1960-10-01), Peppard et al.
patent: 3353928 (1967-11-01), Woyski et al.
patent: 3375061 (1968-03-01), Healy et al.
patent: 3812233 (1974-05-01), Duncan
patent: 3857919 (1974-12-01), Hozen et al.

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