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Mass transfer coefficients of extracting Mo (VI) and W (VI) in a stirred tank by solvent extraction using mixture of Cyanex272 and D2EHPA

Shakib, B ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1080/01496395.2019.1672741
  3. Publisher: Taylor and Francis Inc , 2019
  4. Abstract:
  5. In this study, the mass transfer evaluation of an agitated liquid-liquid system for the extraction of molybdenum and tungsten from aqueous sulfate solution was investigated. It was found from batch experiments for separation of molybdenum from tungsten that the initial aqueous pH, Cyanex272 and D2EHPA concentration, contact time, dispersed phase volume fraction and impeller speed were optimized at 1.3, 0.07 M, 0.29 M, 15 min, 0.09 and 280 rpm, respectively. The results indicate that a suitable composition for stripping is 1.5 M NH4OH and 0.6 M NH4F. Furthermore, a modified correlation based on dimensionless numbers was derived for the prediction of continuous phase mass transfer in the stirred tank with the presence of reactive extraction conditions. © 2019, © 2019 Taylor & Francis Group, LLC
  6. Keywords:
  7. Mass transfer coefficient ; Mean drop diameter ; Molybdenum ; Solvent extraction ; Ammonium hydroxide ; Molybdenum compounds ; Sulfur compounds ; Tanks (containers) ; Tungsten ; Tungsten compounds ; Batch experiments ; Continuous phase ; Dimensionless number ; Drop diameters ; Liquid-liquid systems ; Molybdenum and tungsten ; Reactive extraction ; Sulfate solutions ; Mass transfer
  8. Source: Separation Science and Technology (Philadelphia) ; 2019 ; 01496395 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/01496395.2019.1672741