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标题：Synergic Extraction of Titanium (IV) with the New Solvent Tri-iso-amyl Phosphate (TAP) and Thenoyltrifluoroacetone (TTA)
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作者：S.H. Hasan ; V.C. Joshi ; D.C. Rupainwar 等
期刊名称：Pertanika Journal of Social Sciences & Humanities
印刷版ISSN：0128-7702
电子版ISSN：2231-8534
出版年度：1992
卷号：15
期号：3
出版社：Universiti Putra Malaysia
摘要：The extraction ofTi (IV) from aqueous hydrochloric acid solution was investigated by using three different solvent systems: thenoyltrifluoroacetone (TTA), a new solvent tri-iso-amyl phosphate (TAP)and a mixture of TTA and TAP, all diluted with carbon tetrachloride. An optimum of 90.34% and 97.45 % Ti(IV) was extracted when 4.0 % TTA or 33 % TAP was used, respectively. However, a significant synergic effect was observed even when half the concentration of the two extractants was used, i.e. a mixture of only 2.0% TTA and 16.0% TAP solution extracted as much as 99.03% of the metal from the aqueous HCl solutions.For all these three extraction systems concentrations of Ti(TV) and HCl were maintained at 1.0 x 103 mol V and 11.5 mol t1, respectively. It was concluded that Ti(IV) forms a disolvate with both the ligands, i.e. TTA and TAP, but a 1:1 mixed solvate is formed when a TTA-TAP mixed ligand system is used. It was also established that the TTA combines in its undissociated form unth the central metallic ion Ti(TV). The mathematical treatment of the three extraction systems showed that the average values of log K^for the three systems were 2.48 (TTA), 1.60 (TAP) and 3.19 (TTATAP wnergic system). It was also shown that the experimental value for the mixed solvate system is 7.06 times higher than the statistically evaluated value for the same system.
关键词：dimethylsulphoxide complexes; vanadium (III).