@article{HahnHoldt2012,
  author    = {Hahn, Simone and Holdt, Hans-J{\"u}rgen},
  title     = {Extraction of hexachloroplatinate from hydrochloric acid solutions with phosphorylated hexane-1,6-diyl polymers},
  series = {Reactive \& functional polymers},
  volume    = {72},
  journal   = {Reactive \& functional polymers},
  number    = {11},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1381-5148},
  doi       = {10.1016/j.reactfunctpolym.2012.08.004},
  pages     = {878 -- 888},
  year      = {2012},
  abstract  = {A series of diols (diethylene glycol, triethylene glycol, butane-1,4-diol and hexane-1,6-diol) were immobilized onto Merrifield resin and subsequently phosphorylated with dialkyl chlorophosphate (alkyl = Me, Et, Bu). The resins bearing hexane-1,6-diyl groups exhibited very good extraction abilities in regard to precious metal chloro complexes like platinum(IV), palladium(II) and rhodium(III). In batch experiments, more than 98\% of Pt(IV) is extracted even when the metal and the hydrochloric acid concentration is enhanced significantly. Elution can be achieved with a solution of 0.5 mol L-1 thiourea in 0.1 mol L-1 hydrochloric acid. In the presence of other noble metals, platinum(IV) is preferentially bound. The extraction yield decreases in slightly acidic solution in the following order: Pt(IV)approximate to Pd(II)>Rh(III) and changes with increasing hydrochloric acid concentration to Pt(IV)>Pd(II)>> Rh(III). At different ratios of metal and acid, the temperature has nearly no influence on the platinum extraction. On slightly acidic media, the extraction of rhodium decreases by 30\% when the temperature is increased from 10 degrees C to 40 degrees C. When the acid and metal concentration is enhanced, the palladium extraction decreases by 7-9\%, depending on the resin.},
  language  = {en}
}