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用溶剂萃取法从硝酸浸取液中提取Pd~(2+)与Cu~(2+),Ni~(2+).N_(235)作Pd~(2+)的萃取剂,煤油作稀释剂,癸醇作调相剂,最佳工艺条件是萃取剂组成,25%N_(235)—10%癸醇—65%煤油;硝酸浓度,0.5～3mol/L;温度,室温;1.5mol/L HNO_2作负载有机相杂质离子Ni~(2+),Cu~(2+)的洗涤剂,其一次洗涤率近100%;6%硫脲,或5%氨水作负载有机相中Pd~(2+)的反萃剂,其一次反萃率分别为98.6%,68.5%.
Solvent extraction was used to extract Pd 2+ and Cu 2+, Ni 2+ and N 235 from the nitric acid leaching solution. Agent and decanol as the phase-modulation agent. The optimum conditions were extraction solvent, 25% N 235- 10% decanol-65% kerosene, nitric acid concentration 0.5-3mol / L, temperature, room temperature, L HNO 2 was used as detergent for organic impurity ions Ni 2+ and Cu 2+, the washing rate was nearly 100% in the first time, and 6% thiourea or 5% 2+) stripping agent, the first stripping rate was 98.6%, 68.5%.