Studies of removal of platinum (IV) ion microquantities from the model chloride solutions on the ion exchangers of the functional quaternary ammonium groups

Platinum and other platinum metals have been widely applied in industry. The recovery of noble metals from industrial wastes becomes an economic issue. The laboratory studies of removal of platinum (IV) microquantities from 0.1–6M hydrochloric acid solutions on the ion-exchangers of the functional quaternary ammonium groups (Amberlyst A 26, Purolite A 850 and Lewatit MP 500 A) were done. For these ion-exchangers the recovery factor values [%R Pt(IV)] as well as the sorption isotherms depending on the kind of aqueous phase and phase contact time were determined. Moreover, the weight and bed distribution coefficients as well as working and total ion-exchange capacities were calculated from the platinum (IV) breakthrough curves. Due to their high ion-exchange capacity in relation to platinum (IV) and great resistance to chemical agents, these ion-exchangers can be applied in technologies of platinum recovery and analysis of its trace amounts.