کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
691918 1460456 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Salting-out effect of NaCl on the rate of mass transfer of liquid–liquid extraction in a two impinging-jets contacting device
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Salting-out effect of NaCl on the rate of mass transfer of liquid–liquid extraction in a two impinging-jets contacting device
چکیده انگلیسی

The effect of very low NaCl addition in the recommended liquid–liquid extraction chemical system of toluene–acetone–water was investigated using a two impinging-jets contacting device with a high velocity of jet flows. By Adding salt within the concentration range of 10−6–10−4 mol/L, while the pH was constant and with the jets colliding force within 70.34–214.6 mN, the extraction efficiency and overall volumetric mass transfer coefficient found enhancements to about 22.7% and 35.6% respectively. A high trend of variation is observed for the salt concentrations till only about 10−5 mol/L. This phenomenon can be attributed to the hydration of ions which favours acetone to be transferred easier. Increasing jets force in the impingement of the streams provides a higher efficiency in the extraction process within the range used. In this regard, the variation of interfacial tension with salt concentration was investigated and using the dimensionless Weber and Eotvos numbers in accord with the conditions, an empirical correlation was developed for the prediction of extraction efficiency in the impinging-jets contacting device.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Taiwan Institute of Chemical Engineers - Volume 41, Issue 3, May 2010, Pages 295–301
نویسندگان
, ,