Extraction of lanthanum and cerium from Indian red mud

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• 作者：Abhilash^a ; ^{abhibios@gmail.com" class="auth_mail} ; Shivendra Sinha^b ; Manish Kumar Sinha^a ; ^c ; Banshi Dhar Pandey^a
• 关键词：Red mud ; Leaching ; Lanthanum ; Cerium ; Sulfuric acid
• 刊名：International Journal of Mineral Processing
• 出版年：10 March, 2014
• 年：2014
• 卷：127
• 期：Complete
• 页码：70-73
• 全文大小：1621 K

文摘

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 3 M H₂SO₄ at ambient (35 掳C) temperature, S/L ratio of 10 g/L and agitation rate of 200 rpm in 1 h time. While 99.9% cerium recovery was achieved at 75 掳C and solid/liquid ratio of 10 g/L in 3 M 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.