N_（503）从H_（2）SO_（4）－Cl~－、Br~－、I~－体系中萃取铋

A Study on the Extraction of Bismuth Using N_(503)From the Systems of H_2SO_4 Cl￣-、Br￣-、I￣

Ｎ＿（５０３）是国产的酰胺类萃取剂．它在有色和稀有金属萃取分离上得到了日益广泛的应用￣［１～３］．本文研究Ｎ＿（５０３）从Ｈ＿２ＳＯ＿４－ＮａＣｌ、Ｈ＿２ＳＯ＿４－ＮａＢｒ、Ｈ＿２ＳＯ＿４－ＫＩ三个体系中萃取铋的规律，探索萃取能力与水相络阴离子ＢｉＣｌ￣－＿４、ＢｉＢｒ￣－＿４和ＢｉＩ￣－＿４稳定性的关系．研究了水相酸度和Ｃｌ￣－、Ｂｒ￣－、Ｉ￣－浓度对Ｎ＿（５０３）萃取铋的影响，取得了较好的结果，不仅对有色和稀有金属的萃取分离有重要的实际意义，而且对萃取化学理论也有一定的价值．

N_(503) is a native produced extractent. It is getting widely used innonferrous and rare metel extractions this paper is focusing on the research ofBismuth extraction using N_(503) ,from systems H_2SO_4-NaCl, H_2SO_4-NaBr,H_2SO_4-KI is exploring if thers is regularities of its extraction and ofextraction capaicty and stability ralated with aqueous complex anions BiCl￣-_4、 BiBr￣-_4and BiI_4.The effect of aqueous phase and Cl￣-、Br￣-、I￣- concentrations on extrac-ction of Bismuth were experimented the work has a achieved a better and reasona-ble result.The data obtained have a great and practical significance to the nonfer-rous and rare metal extraction and separation,and to the development of thetheory of extraction chemistry are quite worthful as well.