Abstract
The paper studies the effect of tin (II) chloride additive agents on the sorption of rhodium (III) on ion-exchange resin Purolite S920 with isothiouronium functional groups, weak base anion-exchange resin Purolite S985, and a strong-base anion-exchange resin Purolite A500. It is found that introduction of SnCl2 leads to a substantial improving of selectivity of all tested ion-exchange resins to Rh(III), and increases sorption rate on ion-exchange resins S985 and S920. The paper determines the optimum dosage of SnCl2 (0,01 mol/l), at which partition coefficients of Rh(III) during adsorption on all tested ion-exchange resins reach maximum values. It is shown that quantitative recovery of Rh(III) is achieved in practice during flowing of the multicomponent chloride solution composed of, g/l: 0,2 Rh(III); 72,9 HCl; 53,5 NH4Cl; 2,7 Al(III); 1,23 Fe(III); 5,9 Sn(IV) with addition of SnCl2, through the ion-exchange resin Purolite S920 with isothiouronium functional groups. Desorption of Rh(III) from the saturated ion-exchange resin Purolite S920 with the use of an acidified thiourea solution is not full, no more than 60 %.
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Schedule a callMore From: Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy
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