Polyacrolein-isonicotinic acid hydrazone and polyacrylic acid-thiohydrazide resins-synthesis and sorption properties for precious and base metals |
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Authors: | Xiao-Peng Ge Bao-Wen Zhang Manfred Grote |
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Institution: | (1) Central Iron and Steel Research Institute, No. 76 Xue Yuan, 100081 Nanlu Beijing, Peoples Republic of China;(2) Angewandte Chemie, Universität-GH Paderborn, D-33098 Paderborn, Federal Republic of Germany |
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Abstract: | This investigation carries on previous studies on polyacrolein-styrene resins. Further attempts were made to convert the reactive aldehyde groups of the polymeric support to functional acrolein-isonicotinic acid hydrazone (P-NHZ) or acrylic acid-thiohydrazide derivatives (P-THZD). The conditions of synthesis and the basic sorption and desorption properties of the polymers synthesized are described. For gold and platinum group metals the resins show differences in loading capacities, rates of simultaneous sorption in static conditions and efficiencies in column tests. The elution by thiourea solution was utilized to separate Au, Pd and Pt from an excess of base metals. The P-NHZ resin seems to be more advantageous than the sulfur containing P-THZD resin. |
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Keywords: | Polyacrolein-isonicotinic acid hydrazone resin polyacrylic acid-thiohydrazide resin polyacrolein-styrene resin precious metals |
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