**14. Ion exchangers of functional cyclane groups**

For separation and recovery of Pd(II), Pt(IV) and Au(III), Jermakowicz-Bartkowiak [92] used the resin A7C prepared by the reaction of cyclane (1,4,8,11-tetraazacyclotetradecane) with the copolymer of vinylbenzyl and divinylbenzene chloride (VBC/DVB) obtaining the following sorption capacities: 47.4 (S0), 47.4 (S1) mg Au(III)/g, 48.1 (S0), 47.5 (S1) mg Pt(IV)/g, 26.0 (S0), 25.6 (S1) mg Pd(II)/g resin, where S1 – the multifunctional system, S0 – the single component system (static method) and 0.92 mmol Au(III)/g, 0.66 mmol Pt(IV)/g, 0.9 Pd(II) mmol/g dry resin (dynamic method). Desorption of Au(III), Pt(IV) and Pd(II) ions from the resin was made using a 5 % thiourea solution in 0.1 M hydrochloric acid with the yield 98, 97 and 98%.
