How to correctly select methods for determining the physical properties of HAC-H2O-butyl ester (or isobutyl ester or sec-butyl ester) systems
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To separate HAC from water using azeotropic distillation, n-butyl acetate (isobutyl acetate or sec-butyl acetate) is selected as the azeotrope, and azeotropic distillation is carried out at atmospheric pressure. Question (1): Let’s discuss what physical property model would be more accurate (2) Those who have worked with this system, please offer your guidance. Regarding these substances, are the interparameter values of the activity coefficient models built into ASPEN (such as NRTL, UNIFAC, UNIQAC) reliable? Have you guys verified it? How can it be verified?
1) The thermodynamic approach should use NRTL-HOC; 2) The error in the binary interaction parameters in A+ is relatively large, and it is necessary to correct them using experimental data; 3) Since many of the data are covered by patents, very few data are available publicly, and the parameters that are published are generally not usable
The explanation on the 2nd floor is correct. The method selected for the course material “Azeotropic Distillation of HAc-H2O-IBA” at National Taiwan University is NRTL-HOC. IBA: Isobutyl acetate