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Separation of Re and Mo from roasting-dust leach-liquor using solvent extraction technique by TBP

Keshavarz Alamdari, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.seppur.2011.10.038
  3. Abstract:
  4. Re/Mo separation is studied by a new solvent extraction technique which is based on extraction mechanisms of the constituent metals. Based on McCabe-Thiele plots, a flow diagram has been proposed for separation and purification of Re over Mo. Re-recovery section of the diagram shows that Re is extracted when major amount of Mo is removed. For removal of the remained Mo, a two-stage extraction is required at pH = 2 and V a/V o = 1. In order to obtain Re, the resulted aqueous phase is stripped by adding sulfuric acid. According to the results, while more Re is extracted at less pH, optimum extraction of Mo happens at pH = 1.2. Re selectivity over Mo maximizes by approaching of the pH to zero
  5. Keywords:
  6. Re/Mo separation ; Aqueous phase ; Extraction mechanisms ; Flow diagram ; McCabe-Thiele ; Separation and purification ; Solvent-extraction techniques ; Two stage ; Calcination ; Leaching ; Molybdenum ; Rhenium ; Solvents ; Sulfuric acid ; Solvent extraction
  7. Source: Separation and Purification Technology ; Volume 86 , February , 2012 , Pages 143-148 ; 13835866 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S1383586611006423