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US 12,709,550 B2Granted
Vanadium oxide extraction from Bayer process
AssigneeSnf Group
InventorsBruno Tavernier, M. Venkata Jagannath, Aurélien Bonneau, Manish Kumar Mishra
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Abstract
A process for increasing the extraction yield of vanadium oxides from the spent liquor generated in the Bayer process for the recovery of alumina from bauxite, with the use of a water-soluble polymer. The water-soluble may be a polysaccharide or a synthetic polymer, which may include at least one non-ionic and/or anionic and/or cationic hydrophilic monomers.
Claims10
A process for vanadium oxides extraction from a spent liquor generated in a Bayer process comprising the following steps:
- sending the spent liquor to an evaporator, to separate condensate water from caustic soda concentrate,
- optionally transferring the caustic soda concentrate to a vessel,
- cooling and maintaining the temperature of the caustic soda concentrate between 20° C. and 80° C.,
- adding a water-soluble polymer to said caustic soda concentrate to obtain a suspension comprising vanadium oxide particles,
- recovering said vanadium oxide particles of the suspension by a liquid-solid separation method.
2 more elements
Dependencies are inferred from the claim text.