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Title: Methods to control phase inversions and enhance mass transfer in liquid-liquid dispersions

Abstract

The present invention is directed to the effects of applied electric fields on liquid-liquid dispersions. In general, the present invention is directed to the control of phase inversions in liquid-liquid dispersions. Because of polarization and deformation effects, coalescence of aqueous drops is facilitated by the application of electric fields. As a result, with an increase in the applied voltage, the ambivalence region is narrowed and shifted toward higher volume fractions of the dispersed phase. This permits the invention to be used to ensure that the aqueous phase remains continuous, even at a high volume fraction of the organic phase. Additionally, the volume fraction of the organic phase may be increased without causing phase inversion, and may be used to correct a phase inversion which has already occurred. Finally, the invention may be used to enhance mass transfer rates from one phase to another through the use of phase inversions.

Inventors:
 [1];  [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874946
Patent Number(s):
6495617
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01F - MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
methods; control; phase; inversions; enhance; mass; transfer; liquid-liquid; dispersions; directed; effects; applied; electric; fields; polarization; deformation; coalescence; aqueous; drops; facilitated; application; result; increase; voltage; ambivalence; region; narrowed; shifted; volume; fractions; dispersed; permits; ensure; remains; continuous; fraction; organic; additionally; increased; causing; inversion; correct; occurred; finally; rates; electric field; applied voltage; applied electric; /523/

Citation Formats

Tsouris, Constantinos, and Dong, Junhang. Methods to control phase inversions and enhance mass transfer in liquid-liquid dispersions. United States: N. p., 2002. Web.
Tsouris, Constantinos, & Dong, Junhang. Methods to control phase inversions and enhance mass transfer in liquid-liquid dispersions. United States.
Tsouris, Constantinos, and Dong, Junhang. Tue . "Methods to control phase inversions and enhance mass transfer in liquid-liquid dispersions". United States. https://www.osti.gov/servlets/purl/874946.
@article{osti_874946,
title = {Methods to control phase inversions and enhance mass transfer in liquid-liquid dispersions},
author = {Tsouris, Constantinos and Dong, Junhang},
abstractNote = {The present invention is directed to the effects of applied electric fields on liquid-liquid dispersions. In general, the present invention is directed to the control of phase inversions in liquid-liquid dispersions. Because of polarization and deformation effects, coalescence of aqueous drops is facilitated by the application of electric fields. As a result, with an increase in the applied voltage, the ambivalence region is narrowed and shifted toward higher volume fractions of the dispersed phase. This permits the invention to be used to ensure that the aqueous phase remains continuous, even at a high volume fraction of the organic phase. Additionally, the volume fraction of the organic phase may be increased without causing phase inversion, and may be used to correct a phase inversion which has already occurred. Finally, the invention may be used to enhance mass transfer rates from one phase to another through the use of phase inversions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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Works referenced in this record:

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