Process for the recovery and separation of tantalum and niobium

Details Process for the recovery and separation of tantalum and niobium Process for the recovery and separation of tantalum and niobium

1991-06-24

1993-05-11

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

423 62, 423 64, 423 65, 423 67, 423 68, C22B 3420, C01G 3300, C01G 3500

Patent

active

052099105

ABSTRACT:
Improved solvent extraction recovery of tantalum and niobium oxides from an acid solution of raw materials containing such oxides wherein the charged organic solvent [e.g., MIBK] is washed out (a) with 8-16N sulfuric acid and then (b) with water or dilute HF. This avoids the use of a second mineral acid addition after digestion by HF of raw materials (and avoids problems attendant to use a second mineral acid).

REFERENCES:
patent: 2962372 (1960-11-01), Foos et al.
patent: 3117833 (1964-01-01), Pierret
patent: 3712939 (1971-03-01), Chapps et al.
patent: 3972710 (1976-08-01), Meyer
patent: 4309389 (1982-01-01), Meyer

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