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随着现代科学的发展,对金的应用日益增多,对其纯度要求也越来越高。研究开发提纯金的工艺法势在必行。金提纯方法有多种,电解精炼法、化学还原法、溶剂萃取法。溶剂萃取技术在国内始于二十世纪八十年代,并在近十年得到迅速发展。TBP是一个广泛萃取试剂,主要用于铀、稀土的萃取分离,对金的萃取率也很高(分配比在104左右),然而在常温下反萃金很困难。在现
With the development of modern science, the application of gold is increasing day by day, and its purity requirements are also getting higher and higher. Research and development of gold purification process is imperative. A variety of gold purification methods, electrolytic refining, chemical reduction, solvent extraction. Solvent extraction technology in the country began in the 1980s, and rapid development in the past decade. TBP is a widely used extraction reagent. It is mainly used for extraction and separation of uranium and rare earths. The extraction rate of gold is also very high (the distribution ratio is about 104). However, it is very difficult to extract gold at room temperature. Now