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本文叙述用氢还原法从负载铜的工业萃取剂Kelex 100进行沉淀铜的试验,以便取代常规的反萃取和电积工艺流程。本研究表明,负载铜的KELEX 100(烷基8—羟基喹啉)能够迅速地与氢反应沉淀出铜,而有机相无明显分解。沉淀铜粒粗且易于过滤,而在反应器内的金属表面上仅有少量结疤。在实验中研究了温度、压力和铜粉量对氢还原负载铜的KELEX 100的动力学影响,还研究了铜粉产品的粒度分布和化学性质,此外,还用气——液色谱分析法研究了有机萃取剂在试验条件下的组成和行为。
This paper describes the use of hydrogen reduction from copper-loaded industrial extractant Kelex 100 for the copper precipitation test to replace the conventional stripping and electrowinning process. This study shows that copper-loaded KELEX 100 (alkyl 8-hydroxyquinoline) quickly reacts with hydrogen to precipitate copper without significant decomposition of the organic phase. The precipitated copper particles are coarse and easy to filter, with only a small amount of scarring on the metal surface in the reactor. The effects of temperature, pressure and amount of copper powder on kinetics of KELEX 100 hydrogen-reduced copper loading were studied. The particle size distribution and chemical properties of the copper powder product were also investigated. In addition, the gas-liquid chromatographic analysis Composition and behavior of organic extractant under experimental conditions.