کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
158939 | 457021 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dependence of extraction equilibrium of monocarboxylic acid from aqueous solutions on the relative basicity of extractant Dependence of extraction equilibrium of monocarboxylic acid from aqueous solutions on the relative basicity of extractant](/preview/png/158939.png)
This paper describes monocarboxylic acid extraction from aqueous solution experiments, using five types of mixed solvents and 12 monocarboxylic acids. From the results of these experiments, a new mathematical model, including a new definition of extractant's basicity (pKa,BSpKa,BS), was developed and validated. Trioctylamine (TOA)/1-octanol, TOA/methyl iso -butyl ketone (MIBK), TOA/tetrachloromethane (CCl4CCl4), trialkylphosphine oxide (TRPO) /1-octanol and TRPO/ kerosene, were used as the extractant, and formic, acetic, propionic, butyric, valeric, caproic, monochloroacetic, dichloroacetic, trichloroacetic, glycolic, glyoxylic, and lactic acids, were used as the solutes extracted. The relative basicity of the extractant to the solute extracted (pKa,BSpKa,BS) was measured in different extractant concentrations. The experimental result confirms the mathematic model to predict the extraction equilibrium more accurately. pKa,BSpKa,BS can represent the complicated solvating power of the dilute to the association compound, and depends on the extractant concentration and the type of extractant, diluent and solute.
Journal: Chemical Engineering Science - Volume 61, Issue 8, April 2006, Pages 2574–2581