Aqueous phase pH;
Extraction efficiency;
Impinging jets;
Liquid-liquid extraction;
Mass transfer coefficient;
MASS-TRANSFER COEFFICIENT;
DROP SIZE DISTRIBUTIONS;
COPPER-EXTRACTION;
REACTOR;
D O I:
10.1016/j.jiec.2010.05.003
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The influence of aqueous phase pH on the rate of liquid-liquid extraction was investigated using a two impinging-jets contacting device with a high velocity of jet flows. The recommended chemical system of toluene-acetone-water was employed. Applying pH values from its natural value of 5.6-8, a range in which most industrial waters are lain, for the jets colliding force within 70.3-214.6 mN, leads a reduction in extraction efficiency and overall volumetric mass transfer coefficient up to about 18.9% and 35.2% respectively. A significant high variation is observed when the aqueous phase pH exceeds the water neutral value toward alkali conditions. These variations can be attributed to the adsorption of hydroxyl ions and lowering interfacial tension. A comparison between the results in this work and those for drop dispersion extraction indicates a high sensitivity in the impinging technique. As expected, increasing jets force improves the performance of the contacting device; however, simultaneously, the retarding effect of pH would be intensified. The variation of interfacial tension with pH was obtained and with the aid of dimensionless numbers, an empirical correlation was developed for the prediction of overall volumetric mass transfer coefficient. (C) 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Lee, Jin-Young
Kumar, J. Rajesh
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Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kumar, J. Rajesh
Kim, Joon-Soo
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h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kim, Joon-Soo
Kim, Dong-Jin
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h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kim, Dong-Jin
Yoon, Ho-Sung
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Lee, Jin-Young
Kumar, J. Rajesh
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kumar, J. Rajesh
Kim, Joon-Soo
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kim, Joon-Soo
Kim, Dong-Jin
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea
Kim, Dong-Jin
Yoon, Ho-Sung
论文数: 0引用数: 0
h-index: 0
机构:
Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South KoreaKorea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Met Recovery Dept, Taejon 305350, South Korea