Alcohol Dehydration by Extractive Distillation with Use of Aminoethers of Boric Acid

Aminoethers of boric acid (AEBA) were studied as potential extractants for the separation of aqueous–alcoholic azeotropic mixtures by extractive distillation. The conditions of vapor–liquid equilibrium in aqueous solutions of ethanol and isopropanol in the presence of AEBA were studied. The division...

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Bibliographic Details
Published in:Processes 2020-11, Vol.8 (11), p.1466
Main Authors: Klinov, Alexander V., Malygin, Alexander V., Khairullina, Alina R., Dulmaev, Sergey E., Davletbaeva, Ilsiya M.
Format: Article
Language:English
Subjects:
Acids
Activity coefficients
Alcohol
Alkanes
Aqueous solutions
Boric acid
Boron
Chloride
Cost function
Dehydration
Distillation
Ethanol
Extractants
Flow velocity
Functional groups
Liquid-vapor equilibrium
Mathematical models
Moisture content
Parameters
Potassium
Rectification
Solvents
Trays
Water content
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Summary:Aminoethers of boric acid (AEBA) were studied as potential extractants for the separation of aqueous–alcoholic azeotropic mixtures by extractive distillation. The conditions of vapor–liquid equilibrium in aqueous solutions of ethanol and isopropanol in the presence of AEBA were studied. The division of AEBA molecules into group components was proposed, and previously unknown geometric parameters of the boron group and the energetic pair parameters of the boron group with the alkane group, ether group, amine-3d group, and alcohol group were determined within the framework of the Universal Functional Group Activity Coefficient (UNIFAC) model. The modeling of the extractive rectification process of an ethanol–water mixture with AEBA as extractant has been carried out. The dependences of the cost function on the extractant flow rate, the residual water content in it and the number of theoretical trays were obtained. A technological scheme for ethanol dehydration has been proposed, and its technological characteristics have been calculated.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr8111466