Extraction of Yttrium from Ferruginous Sandstone, Southwestern Sinai, Egypt

H.M. Salman, O.M. El Hussaini, nasr abdelaziz abdelfattah, M.S. Mahmoud

Abstract


The Ferruginous sandstone ore was obtained from Ramlet Hemeyir area, Southwestern Sinai, Egypt, which contains 10 % (REE) rare earth elements. A representative sample has been subjected to acid agitation leaching using H2SO4 where 93% of the REE content was released by mixing the ground sample to (-100 mesh) with concentrated H2SO4 at solid/liquid (S/L) ratio of 1/2 for 5h at a temperature ranged from (250 - 300oC). The REE was precipitated in the oxalate form from the prepared sulfate leach liquor. Next selective extraction of 98% Y was achieved by contacting Y was extracted by di-(2-ethylhexyl) phosphoric acid (D2EHPA) with the aqueous solution of nitric acid leaching of the REE cake. Stripping was done by hot H2O (80 oC). Finally, a precipitation with oxalic acid was done followed by ignition at 950 oC. A yield of 95% Y oxide was produced.


Keywords


, Rare Earth Elements, Separation, D2EHPA, Precipitation.

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