کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
626702 | 1455446 | 2009 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Recovery of propionic acid from an aqueous stream by reactive extraction: effect of diluents
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Reactive extraction is a promising technique for the recovery of carboxylic acid from dilute aqueous solutions. Reactive extraction requires a proper combination of extractant and diluent which provides higher capacity and selectivity. The recovery of propionic acid by reactive extraction (present in concentration range of 0.05-0.4 kmol/m3 in the aqueous phase) was studied using tri-n-butyl phosphate (TBP) in different diluents (n-heptane, petroleum ether and toluene). Extraction using pure diluents was found to be poor. Using the mixtures of extractant-diluents the extraction was significantly improved. Results are presented in terms of distribution coefficient, equilibrium complexation constant, loading ratio and extraction efficiency. Propionic acid-TBP was found to form a 1:1 complex with no overloading in any case. Though the TBP-toluene system was found to provide the highest distribution coefficient of the three diluents tested, when extraction is to be done from a fermentation broth where a toxicity problem is the main consideration factor for selection of solvent, TBP + n-heptane is preferred.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 244, Issues 1â3, August 2009, Pages 12-23
Journal: Desalination - Volume 244, Issues 1â3, August 2009, Pages 12-23
نویسندگان
Amit Keshav, Kailas L. Wasewar, Shri Chand,