Process for removing thorium and recovering vanadium from titani

Details Process for removing thorium and recovering vanadium from titani Process for removing thorium and recovering vanadium from titani

1994-01-31

1996-02-27

Mai, Ngoclan

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 20, 423 65, 423 68, C22B 6002, C22B 3422

Patent

active

054946484

ABSTRACT:
A process for removal of thorium from titanium chlorinator waste comprising: (a) leaching an anhydrous titanium chlorinator waste in water or dilute hydrochloric acid solution and filtering to separate insoluble minerals and coke fractions from soluble metal chlorides; (b) beneficiating the insoluble fractions from step (a) on shaking tables to recover recyclable or otherwise useful TiO.sub.2 minerals and coke; and (c) treating filtrate from step (a) with reagents to precipitate and remove thorium by filtration along with acid metals of Ti, Zr, Nb, and Ta by the addition of the filtrate (a), a base and a precipitant to a boiling slurry of reaction products (d); treating filtrate from step (c) with reagents to precipitate and recover an iron vanadate product by the addition of the filtrate (c), a base and an oxidizing agent to a boiling slurry of reaction products; and (e) treating filtrate from step (d) to remove any remaining cations except Na by addition of Na.sub.2 CO.sub.3 and boiling.

REFERENCES:
patent: 3016286 (1962-01-01), Masukawa et al.
patent: 3975495 (1976-08-01), Bowerman
patent: 4446116 (1984-05-01), Krismer et al.
patent: 4451438 (1984-05-01), Floeter et al.
patent: 5049363 (1991-09-01), Feuling
patent: 5181956 (1993-01-01), Chao
patent: 5271910 (1993-12-01), van der Meer et al.

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