Processes for the selective separation of iron and aluminium
AssigneesUniversity of South Australia, Shanxi Ruienze Technology Co., Ltd., Shanxi University
InventorsFangqin Cheng, Li Cui, Jingfang Zhou, John Ralston, Fangbin Xue
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Abstract
This disclosure relates to a process for selectively extracting Fe(III) ions from an aqueous feedstock containing Fe(III) ions and non-ferric ions. The process comprises contacting the feedstock with an organic phase comprising a phosphonium salt or ammonium salt ionic liquid under liquid-liquid extraction conditions for a time sufficient to allow transfer of at least some of the Fe(III) ions from the feedstock to the organic phase to provide an Fe(III) ion laden organic phase and an Fe(III) depleted feedstock, and separating the Fe(III) ion laden organic phase from the Fe(III) depleted feedstock.
Claims20
A process for selectively removing Fe(III) ions from a coal gangue leachate, the process comprising contacting the leachate with an organic phase comprising a phosphonium salt or ammonium salt ionic liquid under liquid-liquid extraction conditions for a time sufficient to allow transfer of at least some of the Fe(III) ions from the leachate to the organic phase to provide a Fe(III) ion laden organic phase and an Fe(III) depleted leachate, and separating the Fe(III) ion laden organic phase from the Fe(III) depleted leachate.
A process for recovering high purity aluminium chloride from coal gangue, the process comprising leaching the coal gangue to provide a coal gangue leachate, contacting the leachate with an organic phase comprising a phosphonium salt or ammonium salt ionic liquid under liquid-liquid extraction conditions for a time sufficient to allow selective transfer of at least some of Fe(III) ions from the leachate to the organic phase to provide a Fe(III) ion laden organic phase and an Fe(III) depleted leachate, separating the Fe(III) ion laden organic phase from the Fe(III) depleted leachate, and recovering aluminium chloride from the Fe(III) depleted leachate.
Dependencies are inferred from the claim text.