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Citation: MEI Fan, QIN Wei, DAI You-Yuan. Extraction Behavior of Benzoic Acid in Dilute Solution[J]. Chinese Journal of Applied Chemistry, ;2002, 19(6): 517-520. shu

Extraction Behavior of Benzoic Acid in Dilute Solution

1.
Department of Chemical Engineering, Tsinghua University, Beijing 100084

Corresponding author: QIN Wei,
Received Date: 15 November 2001
Available Online: 26 March 2002
Fund Project: 国家自然科学基金资助项目(No.29836130) (No.29836130)

The extraction equilibrium experiments for benzoic acid in dilute solution were carried out using tributyl phosphate(TBP) in kerosene, n-octanol, n-butanol, hexane, heptane, benzene and MIBK as extractants. The extraction equilibrium equations have been deducted and the apparent extraction equilibrium constants were obtained by the regression of the experimental data. The results showed that the distribution coefficient(D) of benzoic acid depended on the polarity of the solvent in the order of n-octanol > n-butanol > MIBK > benzene > hexane(heptane). The stronger the polarity, the larger the distribution coefficient. The extractability of n-octanol was equivalent to that of 30% TBP-kerosene, and n-octanol is a promising extractant for commercial use.
- benzoic acid,
- extraction,
- tributyl phosphate,
- n-octanol
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