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本文研究了TnOA-H2SO4体系萃取铬（Ⅵ），考察了酸度、被萃物、萃取剂与SO4(2-)浓度、萃取时间和温度等因素对萃取的影响。用饱和法、摩尔比法、等摩尔系列法和IR法联合确定苹合物的组成和萃取平衡机理，表明萃取过程属阴离于交换机理，揭示了Deptuta等对Cr（Ⅵ）的萃取型体的异论。
In this paper, the extraction of chromium (Ⅵ) by TnOA-H2SO4 system was studied. The effects of acidity, extract, SO4 (2-) concentration, extraction time and temperature on the extraction were investigated. The composition and extraction equilibrium mechanism of the complexes were determined by saturation method, molar ratio method, equimolar series method and IR method. The results showed that the extraction process was anion exchange mechanism, which revealed that the extraction of Cr (Ⅵ) by Deptuta et al. The difference.