摘要
用放射性核素198Au示踪法研究了季铵盐十四烷基二甲基苄基氯化铵 (TDMBA)从碱性氰化液中萃取金 ,考察了水相金浓度、助溶剂含量、萃取时间、季铵盐与KAu(CN) 2 摩尔比值nr 等因素对萃取率的影响 ,并研究了有机相的连续萃取、有机相金含量与水含量的关系。结果表明 ,助溶剂体积比 10 %以上时 ,十四烷基二甲基苄基氯化铵对金具有萃取能力强 ,平衡时间短的特点。季铵盐阳离子与Au(CN) 2 - 结合比为 1∶1,符合离子缔合机理。
The solvent extraction of gold from alkaline cyanide solution by tetradecyldimethylbenzylammounium chloride(TDMBA) was described by labelled 198 Au.The influence of several variables such as gold and cosolvent concentrations,shaking times,the ratio of TDMBA and gold on the extraction of gold(I) and the water concentration of the organic phase were studied.While the cosolvent ratio is more than 10%,in the TDMBA system,gold(I) was extracted completely.The gold extraction mechanism was discussed on the bases of water concentrations of organic phases and Infrared Spectrum.It was found that the aggregation ratio of TDMBA and Au(CN)\-2\+- is 1∶1.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2000年第6期766-771,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
云南省省校科技合作项目
关键词
萃取
十四烷基二甲基苄基氯化铵
金
萃取机理
solvent extraction
tetradecyldimethylbenzylammonium chloride
KAu(CN)\-2
labelled 198 Au
