Mass Transfer of Er(Ⅲ) Between HBTMPTP Dissolved in n-Heptane and HAc-NaAc

Abstract

Abstract: The rate of extraction of Er(Ⅲ) from aqueous acetate solutions at 0.2 mol/Lionic strength by HBTMPTPin n heptane was studied by using a constant interfacial area cell with laminar flow at (30± 0.5) ℃. The interfacial activity of HBTMPTPwas investigated at n heptane/ 0.2 mol/L(H, Na)Ac (pH= 5.00 ) interface. The rate of Er(Ⅲ) extraction was measured aT_different chemical compositions by varying hydrogen ion, HBTMPTP, Cyanex 302 and chlorine ion concentrations. The effect of stirring speed, temperature and special interfacial area on the rate of extraction was also studied. The results showed that, under the conditions of the experiments, the overall rate is diffusion controlled. It was found that the impurities of Cyanex 302 have the effect of synergistic extraction.

Key words: Extraction, Kinetics, Er(Ⅲ), Bis(2,4,4-trimethylpentyl)monothiophosphinic acid, Cyanex302

CLC Number:

O613.33

TrendMD:

YUE Shan-Tang, MA Gen-Xiang, LI De-Qian, SU Qiang . Mass Transfer of Er(Ⅲ) Between HBTMPTP Dissolved in n-Heptane and HAc-NaAc[J]. Chem. J. Chinese Universities, 2000, 21(6): 832.

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Mass Transfer of Er(Ⅲ) Between HBTMPTP Dissolved in n-Heptane and HAc-NaAc

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