Feasibility Evaluation of Quinary Heterogeneous Reactive Extractive Distillation

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This study addresses a feasibility evaluation method for the heterogeneous reactive extractive distillation of azeotropic quinary mixtures based on visualization in composition space. A critical composition region, that is, thermodynamically infeasible region for heterogeneous reactive extractive distillation, is determined by the constraint of reaction and phase equilibria. In addition, operating constraints are imposed on the feasibility evaluation in terms of the upper and lower internal reflux boundaries. Using these two kinds of feasibility constraints, we examine how the ethyl and isopropyl acetate reactive distillation systems, which cannot produce pure products because of four minimum-boiling azeotropes, lead to a full conversion and pure product recovery with the introduction of an external entrainer inducing L-L splits. The pure acetate production in a single reactive extractive distillation column is possible because the composition trajectory approaches the desired region in composition space without being blocked by both the critical composition region and the infeasible region confined by the internal reflux boundaries.
Publisher
AMER CHEMICAL SOC
Issue Date
2014-08
Language
English
Article Type
Article
Keywords

ACETIC-ACID; SEPARATION BOUNDARIES; FEASIBLE PRODUCTS; DIFFERENCE POINTS; ISOPROPYL ACETATE; METHYL ACETATE; ETHYL-ACETATE; SCALE-UP; SYSTEMS; DESIGN

Citation

INDUSTRIAL ENGINEERING CHEMISTRY RESEARCH, v.53, no.31, pp.12387 - 12398

ISSN
0888-5885
DOI
10.1021/ie5005477
URI
http://hdl.handle.net/10203/189827
Appears in Collection
CBE-Journal Papers(저널논문)
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