TY  - JOUR
A1  - Hahn, Simone
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
A1  - Holdt, Hans-Jürgen
T1  - Crystal structure of bis(2-ethylthiomethylpyridine)platinum(II) hexachloroplatinate, [Pt(C8H11NS)2][PtCl6]
N2  - C16H22Cl6N2Pt2S2, orthorhombic, Pbca (no. 61), a = 15.5660(8) angstrom, b = 17.4892(9) angstrom, c = 18.161 (1) angstrom, V = 4944. 1 angstrom(3), Z = 8, R-gt(F) = 0.030, wR(ref)(F-2) = 0.055, T = 210 K.
Y1  - 2008
UR  - http://zkrist_ncs.cpfs.mpg.de/pdf223-4/216_1267-2377.pdf
U6  - https://doi.org/10.1524/ncrs.2008.0216
SN  - 1433-7266
ER  - 
TY  - JOUR
A1  - Hahn, Simone
A1  - Holdt, Hans-Jürgen
T1  - Extraction of hexachloroplatinate from hydrochloric acid solutions with phosphorylated hexane-1,6-diyl polymers
JF  - Reactive & functional polymers
N2  - 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.
KW  - Solid-phase extraction
KW  - Platinum group metals
KW  - Modified polymer resin
KW  - Phosphate
KW  - Adsorption isotherm
Y1  - 2012
U6  - https://doi.org/10.1016/j.reactfunctpolym.2012.08.004
SN  - 1381-5148
VL  - 72
IS  - 11
SP  - 878
EP  - 888
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hahn, Simone
A1  - Träger, Juliane
A1  - Holdt, Hans-Jürgen
T1  - Solid-Phase extraction of Pt(IV) with Dialkyl-(hexane-1,6-diyl) phosphate modified merrifield resins from aqueous chloride media in column operations
JF  - Separation and purification technology
N2  - A series of three dialkyl phosphate resins with a Merrifield resin support was used to extract platinum from acidic media. In column operations total capacities of 85-130 mg/g were gained. The presence of palladium and rhodium results in the order: Pt(IV) > Pd(II) >> Rh(III). From a leach liquor gained from spent automotive catalysts metals forming anionic chloro complexes are co-extracted only to a small extent. However, in order to separate and enrich platinum a selective back-extraction can be done with a sodium thiocyanate solution. A second elution step with acidic thiourea leads to a mixed solution of palladium and rhodium.
KW  - platinum
KW  - column operation mode
KW  - phosphate
KW  - solid-phase extraction
Y1  - 2015
U6  - https://doi.org/10.1080/01496395.2014.968264
SN  - 0149-6395
SN  - 1520-5754
VL  - 50
IS  - 2
SP  - 191
EP  - 206
PB  - Taylor & Francis Group
CY  - Philadelphia
ER  -