膦氧化物萃取Au(CN)_2^-

EXTRACTION OF Au(CN) - 2 BY USING PHOSPHINE OXIDEX

膦氧化物萃取剂Ｃｙａｎｅｘ９２１和Ｃｙａｎｅｘ９２３用于从金的氰化物溶液中萃取Ａｕ（ＣＮ）－２，反应可在常温下进行；煤油作稀释剂，锂盐作盐析剂，能明显提高萃取率；萃取反应在３ｍｉｎ即可达到平衡；Ｃｙａｎｅｘ９２１和Ｃｙａｎｅｘ９２３的萃取效果相近。在６０℃时。

This experiment deals with the equivalent extraction efficiency of gold and the relation between the variables such as time temperature,ionic strength, Au(CN) - 2 concentration in aqueous solutions, organic solutions and extractant concentration in organic solution when gold(i) is extraction from cyanide solutions by phosphine oxies Cyanex 921 and Cyanex 923. In addition,it involves the counter extraction and the extraction reaction mechanism.