کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6619239 | 1424494 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Liquid-liquid equilibrium data for ternary systems of water + acetic acid+ acetate esters at 293.2 K and 303.2 K and â 95 kPa
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Liquid-liquid equilibrium data for water + acetic acid + {ethyl or butyl or isobutyl of isoamyl or heptyl acetate} systems at Tâ¯=â¯{293.2 and 313.2} K and atmospheric pressure (Pâ¯ââ¯95â¯kPa) were determined by density and refractive index measurements. Binodal curves were constructed utilizing cloud point method and tie lines were determined using equations obtained through cloud point data fit. Partition coefficients, ester selectivities and percent of extraction were calculated in order to compare the solvents employed. It was verified that immiscibility region increases in the order: ethylâ¯<â¯butylâ¯ââ¯isobutylâ¯<â¯isoamylâ¯<â¯heptyl. Partition coefficients were higher for systems with ethyl acetate. Selectivity values achieved were all above 1, and heptyl acetate presented greater values among all solvents studied. Percent of extraction for acetic acid feed molar between 0.05 and 0.12 is greater for ethyl acetate; from 0.12 to 0.20, it is greater for butyl acetate; and, from 0.24 to 0.30, only data for heptyl could be determined. Different temperatures utilized did not presented significant variation in the results obtained. Experimental data were correlated with NRTL model, presenting root mean square deviation equal to 1.074 for 55 tie lines. NRTL was also used to estimate plait points for all systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 463, 15 May 2018, Pages 34-47
Journal: Fluid Phase Equilibria - Volume 463, 15 May 2018, Pages 34-47
نویسندگان
Laerti Reis Roque, Rafaela Rocha Pinto, Leonardo Hadlich de Oliveira, Sarita Cândida Rabelo,