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Title: Concentrated emulsion pathway to novel composite polymeric membranes and their use in pervaporation

Abstract

Pervaporation is becoming recognized as an energy-efficient alternative to distillation and other separation methods of liquid mixtures, especially in cases in which the traditional separation techniques are not efficient, such as the separation of azeotropic mixtures, close-boiling-point components, isomeric components, and recovery or removal of trace organic substances from aqueous solutions. Novel composite polymeric membranes have been prepared, using concentrated emulsions as precursors, and employed in the pervaporation of various liquid mixtures. In order to improve the stability of the concentrated emulsion, the hydrophilicity and/or the hydrophobicity of the phases involved must be increased by replacing them with their solutions in water and/or in a hydrocarbon, respectively. Another possibility of improving the stability is to increase the viscosity of the phases, by partial polymerization of one or both phases before preparing the concentrated emulsion. The emulsion gel was subsequently transformed into a polymer composite by polymerizing both phases. The dispersed phase should be selected to yield a hydrophobic (hydrophilic) polymer which is compatible with the components selected for separation and incompatible with the other components, while the continuous phase should be selected to yield a hydrophilic (hydrophobic) polymer which is incompatible with all of the components of the mixture, andmore » thus it can ensure the integrity of the membrane. As examples, several composite polymeric membranes were designed, prepared, and employed in the separation by pervaporation of water-ethanol,aromatics-paraffinics, and aromatics-alcohol mixtures.« less

Authors:
;  [1]
  1. State Univ. of New York, Buffalo, NY (United States). Dept. of Chemical Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
183018
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 34; Journal Issue: 10; Other Information: PBD: Oct 1995
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MEMBRANES; FABRICATION; STABILIZATION; PRECURSOR; POLYMERIZATION; ETHANOL; DEHYDRATION; AROMATICS; ALKANES; ALCOHOLS; BINARY MIXTURES; MEMBRANE TRANSPORT; ENERGY EFFICIENCY

Citation Formats

Ruckenstein, E, and Sun, F. Concentrated emulsion pathway to novel composite polymeric membranes and their use in pervaporation. United States: N. p., 1995. Web. doi:10.1021/ie00037a048.
Ruckenstein, E, & Sun, F. Concentrated emulsion pathway to novel composite polymeric membranes and their use in pervaporation. United States. https://doi.org/10.1021/ie00037a048
Ruckenstein, E, and Sun, F. Sun . "Concentrated emulsion pathway to novel composite polymeric membranes and their use in pervaporation". United States. https://doi.org/10.1021/ie00037a048.
@article{osti_183018,
title = {Concentrated emulsion pathway to novel composite polymeric membranes and their use in pervaporation},
author = {Ruckenstein, E and Sun, F},
abstractNote = {Pervaporation is becoming recognized as an energy-efficient alternative to distillation and other separation methods of liquid mixtures, especially in cases in which the traditional separation techniques are not efficient, such as the separation of azeotropic mixtures, close-boiling-point components, isomeric components, and recovery or removal of trace organic substances from aqueous solutions. Novel composite polymeric membranes have been prepared, using concentrated emulsions as precursors, and employed in the pervaporation of various liquid mixtures. In order to improve the stability of the concentrated emulsion, the hydrophilicity and/or the hydrophobicity of the phases involved must be increased by replacing them with their solutions in water and/or in a hydrocarbon, respectively. Another possibility of improving the stability is to increase the viscosity of the phases, by partial polymerization of one or both phases before preparing the concentrated emulsion. The emulsion gel was subsequently transformed into a polymer composite by polymerizing both phases. The dispersed phase should be selected to yield a hydrophobic (hydrophilic) polymer which is compatible with the components selected for separation and incompatible with the other components, while the continuous phase should be selected to yield a hydrophilic (hydrophobic) polymer which is incompatible with all of the components of the mixture, and thus it can ensure the integrity of the membrane. As examples, several composite polymeric membranes were designed, prepared, and employed in the separation by pervaporation of water-ethanol,aromatics-paraffinics, and aromatics-alcohol mixtures.},
doi = {10.1021/ie00037a048},
url = {https://www.osti.gov/biblio/183018}, journal = {Industrial and Engineering Chemistry Research},
number = 10,
volume = 34,
place = {United States},
year = {1995},
month = {10}
}