新型萃取剂YORS萃取Zn(Ⅱ)-NH3配合物体系中的锌

来源期刊:中国有色金属学报2011年第3期

论文作者:何静 黄玲 陈永明 唐谟堂 金胜明 冯瑞姝 吴胜男

文章页码:687 - 693

关键词:氧化锌矿;Zn(Ⅱ)-NH3体系;溶剂萃取;2-乙酰基-3-氧代-二硫代丁酸-十四烷基酯

Key words:zinc oxide ores; Zn(Ⅱ)-NH3 system; solvent extraction; 2-acetyl-3-oxo-dithiobutyric acid-myristyl ester

Abstract: In order to enrich the zinc concentration in ammoniacal leaching solution of low grade of zinc oxide ores, 2-acetyl-3-oxo-dithiobutyric acid-myristyl ester, a new extractant, named as YORS, was used to extract zinc ion from Zn(II)-NH3 solutions. The results show that the average extraction ratio of zinc is larger than 97% and the distribution ratio of zinc can reach 41.74 under the following optimum conditions: organic phase composition 50%YORS+45%H (diluent)+5%P (additive), phase ratio V(A)/V(O) =2:1, temperature 298.15 K, agitation time 5 min, total ammonium concentration 2 mol/L, initial pH value 9~11. YORS extractant and loaded organic phase was characterized by FTIR and UV spectra to determine their molecular structures, respectively. It is demonstrated that the β-diketone of YORS reacts with free bivalent zinc ion to form coordination compound during zinc solvent extraction, but zinc ammine complexes are not co-extracted.

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