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Iron Extraction from Simulated Aluminum Nitrate Leach Liquor.
Eisele-JA; Smith-FR; Bauer-DJ
MISSING :9 pages
As part of its goal of maintaining an adequate supply of minerals to meet national economic and strategic needs, the Bureau of Mines has studied the removal of iron from simulated aluminum nitrate leach liquors by solvent extraction. Iron must be removed from aluminum nitrate liquor produced by leaching calcined kaolinitic clay with hno3 to reduce the iron level in alumina to less than 0.02 wt-pct fe203 for use in reduction cells. The parameters reported are for (1) extracting iron from a feed containing 1.5 G/l fe with di(2- ethylhexyl) phosphoric acid (ehpa), (2) stripping loaded organic phase with 20-pct hcl, and (3) water washing of loaded and stripped organic phase. Recommended operating conditions are two extraction stages using 15 vol-pct ehpa in kerosene and three stripping stages using 20-pct hcl. Results are also given for tests using other extractants and stripping agents.
IH; Report of Investigations
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division