Using aliquat 336 impregnated solid carriers for platinum recovery from chloride solution
Abstract
Six sorbents formed by impregating ionic liquid (IL) aliquat 336 on different solid carriers such as SiO2-100, SiO2-60, Al2O3, Al-HMS, and amberlite XAD-4 and amberlite XAD-7 exchange resins were used to recover platinum from chloride solution with high yield (over 99%). The influence of some factors such as structure of solid carriers, the content of ionic liquid loading (% pore volume), and molar ratio IL/Pt on platin sorption was investigated. The Pt recovery yield reached 96% when molar ratio of IL to platinum of 10 and IL loading of 20% pore volume. The sorption capacity of sorbents with different VIL/Vpor ratio and IL/Pt ratio was also investigated. The results of investigation of influence of some factors and of maximum sorption capacity show that the molar ratio of IL to platinum of 10-10.5 and VIL/Vpor ratio of 50% should be used for Pt recovery process from chloride solution.
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