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Recovery of Rhenium From Produced Leaching Solution of Sarcheshmeh Molybdenite Concentrate

Khosravi, Mohammad Hadi | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44319 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Yoozbashizadeh, Hossein
  7. Abstract:
  8. In this study, molybdenum and rhenium extraction from alkaline solution of electro-oxidation leachinng of Sarcheshmeh molybdenite concentrate by solvent extraction using organophosphorous organic solvents, under different conditions has been investigated. The studied variables were organic solvent concentration, ratio of organic phase to aqueous phase and pH. Design Expert software and Central Composite Design method was performed to evaluate the effect of parameters and optimize recovery conditions. Molybdenum was extracted via Di-2-EthyHexyl Phosphoric Acid (D2EHPA) organic solvent diluted in kerosene initially, in order to reduce molybdenum ions interruptions during extraction of rhenium. Optimum conditions was occurred at pH =7 , concentration of organic solvent = 30% , (O:A) ratio = 1:2. In the examined conditions, the recovery of molybdenum is 99.6%. After extraction of molybdenum according to optimal conditions, Rhenium was extracted by Tri Butyl Phosphate (TBP) organic solvent diluted in kerosene. Optimum conditions was obtained at pH = 9, concentration of organic solvent = 70%, (O:A) ratio = 1:1. In the examined conditions, the recovery of rhenium is 90%
  9. Keywords:
  10. Molybdenum ; Rhenium ; Solvent Extraction ; Central Composite Design ; Tri-butyl Phoaphate ; Electre-Oxidation Leaching ; Diethyl Hexyl Phosphoric Acid (DEHPA)

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