Purification of phosphorus containing scheelite ore

Details Purification of phosphorus containing scheelite ore Purification of phosphorus containing scheelite ore

1999-02-09

2000-04-18

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423155, 4231573, 4231575, C01G 4100, C01F 100, C22B 2600, C01B 2532

Patent

active

060511966

ABSTRACT:
A method for purifying a phosphorus containing scheelite ore is described wherein the calcite phase is selectively dissolved prior to dissolution of the apatite phase. Selective dissolution of the calcite produces several benefits: (1) a usable calcium solution, (2) enhanced apatite dissolution, and (3) lower volumes of toxic acid solution for disposal.

REFERENCES:
patent: 3915391 (1975-10-01), Mercade
patent: 4040519 (1977-08-01), Fukazawa
patent: 4349515 (1982-09-01), Muller
patent: 4910000 (1990-03-01), Davey

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