Solubility of ammonium metal fluorides in aqueous ethanol mixtures - implications for scandium recovery by antisolvent crystallization.

ABSTRACT: The recovery of scandium from waste streams of other mining and metallurgical processing industries is gaining research interest due to the scarcity of scandium-containing ores. Hydrometallurgical techniques such as leaching, solvent extraction and crystallization amongst others have been successfully applied to recover scandium salts from such waste streams. Scandium can be recovered as (NH₄)₃ScF₆ by antisolvent crystallization from NH₄F strip liquors obtained after solvent extraction. The coextraction of metal impurities such as Fe, Al, Zr and Ti causes contamination of the final solid product. The extent of coprecipitation of ammonium metal fluorides depends on their initial concentration in the strip liquor and their solubility in the NH

SUBMITTER: Peters EM 

PROVIDER: S-EPMC9813942 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature