Extraction of lanthanum and cerium from Indian red mud

Laboratory-scale experiments were conducted to recover lanthanum and cerium from Indian red mud in sulfuric acid medium. The method includes acid leaching of red mud pulp and subsequent liquid–liquid extraction of the leached metals with different organic extractants, in order to establish the techn...

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Bibliographic Details
Published in:International journal of mineral processing 2014-03, Vol.127, p.70-73
Main Authors: Abhilash, Sinha, Shivendra, Sinha, Manish Kumar, Pandey, Banshi Dhar
Format: Article
Language:English
Subjects:
Cerium
Lanthanum
Leaching
Red mud
Sulfuric acid
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Summary:Laboratory-scale experiments were conducted to recover lanthanum and cerium from Indian red mud in sulfuric acid medium. The method includes acid leaching of red mud pulp and subsequent liquid–liquid extraction of the leached metals with different organic extractants, in order to establish the technical feasibility of extraction and separation simultaneously. Maximum recovery of lanthanum (99.9%) was recorded with 3M H2SO4 at ambient (35°C) temperature, S/L ratio of 10g/L and agitation rate of 200rpm in 1h time. While 99.9% cerium recovery was achieved at 75°C and solid/liquid ratio of 10g/L in 3M H2SO4. Significant specificity for complete extraction of lanthanum, cerium and scandium by Cyanex 301 was noted as compared to the solvents such as DEHPA and Cyanex 272. •Red mud sample contained La (110ppm) as Allanite and Ce (70ppm) as Dissakisite.•99.9%La and Ce were leached out with 3M H2SO4 at 35°C and 75°C respectively.•CYANEX 301 extracted La, Ce and Sc completely from the leach liquor of the red mud.
ISSN:0301-7516
1879-3525
DOI:10.1016/j.minpro.2013.12.009