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Optimization of platinum extraction by Trioctylphosphine oxide in the presence of alkaline-metal salts

Nejad, H. H ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.proeng.2012.07.522
  3. Publisher: 2012
  4. Abstract:
  5. Effect of alkaline metal salts on the solvent extraction of platinum from leached spent dehydrogenation catalysts (Pt/Al2O3) in aqua-regia by the Trioctylphosphine oxide (TOPO) has been investigated. Best salting out effect was achieved using KCl as the additive salt in which process upto 90% of Platinum extraction achieved. Response Surface methodology utilized in order to design the experiments, model the extraction process for platinum and aluminum as well as; optimize the whole process. It was shown that solvent extraction of platinum by TOPO was kinetically fast and the needed equilibrium time for it was less than 30 seconds. In the present study, proposed models for platinum and aluminum extractions were reported and optimum conditions determined which led to the highest separation factors
  6. Keywords:
  7. Box behnken ; Design expert ; Liquid-liquid extraction ; Pt recovery ; Response surface methodology ; RSM ; Salting-out effect ; Spent catalyst ; TOPO ; Trioctylphosphine oxide
  8. Source: Procedia Engineering, 25 August 2012 through 29 August 2012 ; Volume 42 , August , 2012 , Pages 1302-1312 ; 18777058 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1877705812029293