Vandium recovery process

Details Vandium recovery process Vandium recovery process

1986-11-18

1989-07-18

Garvin, Patrick P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

423 65, 423 68, 423592, 502 27, 502 33, C01G 3100

Patent

active

048491896

ABSTRACT:
A process for the preparation of pentavalent vanadium compounds from acid extracts obtained by regenerating spent catalysts which contain vanadium, this process comprising the successive steps of (1) oxidizing extracts containing tri- and tetravalent vanadium with an oxygen-containing gas at a pH of at least 0.7 to 1.4 p.sub.o and at most 2.3-1.4 p.sub.o to form a solution of tetravalent vanadium compounds, and (2) continuing the oxidation at a pH lying in the range of from 3.2-1.4 p.sub.o to 2.3-1.4 p.sub.o to form concentrates of pentavalent vanadium having a partial oxygen pressure, 0.05 MPa.

REFERENCES:
patent: 4436706 (1984-03-01), Nacken et al.
patent: 4443415 (1984-04-01), Queneau et al.
patent: 4495157 (1985-01-01), Sebenik et al.
patent: 4539186 (1985-09-01), Schemei et al.
"Handbuch der Anorganischen Chemie", (Handbook of Inorganic Chemistry), Gmelin, 8 (1968), Vanadium A2, pp. 554-555.
Fundementals of Chemistry 4th Ed., by Brescia et al., Academic Press, N.Y., 1980, pp. 82-83.

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