Process for the recovery of pentavalent vanadium compounds from

Details Process for the recovery of pentavalent vanadium compounds from Process for the recovery of pentavalent vanadium compounds from

1982-08-06

1984-03-13

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

423592, C01G 3102

Patent

active

044367066

ABSTRACT:
A process for the preparation of pentavalent vanadium compounds by reprocessing acid extracts of vanadium-containing catalysts spent in the hydrotreatment of crude or residual oils, characterized in that extracts containing trivalent and tetravalent vanadium are oxidized at a pH between 0.5 and 2.6 with an oxygen-containing gas to form concentrates of tetravalent vanadium, after which oxidation is carried out at a pH between 2.6 and 4.0 with an oxygen-containing gas to form concentrates of pentavalent vanadium and in that solid vanadium compounds are subsequently recovered by separating them from the liquid phase.

REFERENCES:
patent: 4150092 (1979-04-01), Pitts
patent: 4320097 (1982-03-01), Brown et al.

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