کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
202817 460623 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Density and refractive index measurements of critical mixture 1,4-dioxane + water + saturated KCl in homogenous phase region
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Density and refractive index measurements of critical mixture 1,4-dioxane + water + saturated KCl in homogenous phase region
چکیده انگلیسی

The ternary critical mixture of 1,4-dioxane (1) + water (2) + saturated KCl (3) has a lower critical point. The density ρ and refractive index n of this system have been measured as function of temperature for nine critical mixtures along the coexistence curve below the temperature of phase-transition. The water mole fraction in free basis x2 in the mixtures extends from (0.550 to 0.880) and the molality m of KCl from 0.47 to 2.039 mol kg−1. With increase of temperature, water mole fraction and KCl molality, the obtained density decreased, while the refractive index decreases with increase in temperature, water mole fraction and molality of salt. Both represented anomalies near the critical temperature Tc. The molar fraction of critical mixture, increase less than 1%, with temperature and decrease by 10%, with water mass fraction and molality of salt. The critical density and the critical refractive index vary linearly with water mass fraction w2w2 with molality m of KCl as a third degree polynomial.The temperature of separation of phase Tt varies with critical composition in water and molality of KCl.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 293, Issue 1, 15 June 2010, Pages 79–86
نویسندگان
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