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Separation by dielectric distribution: Theory
Author(s) -
Black B. C.,
Hammond E. G.
Publication year - 1965
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02632449
Subject(s) - dielectric , electric field , condenser (optics) , dipole , mechanics , polar , intensity (physics) , field (mathematics) , materials science , emulsion , cylinder , liquid dielectric , thermodynamics , mineralogy , analytical chemistry (journal) , chemistry , optics , physics , chromatography , geometry , mathematics , optoelectronics , light source , biochemistry , organic chemistry , quantum mechanics , astronomy , pure mathematics
Dielectric distribution may be defined as the distribution that mobile materials with different constants will assume in a nonuniform electric field. The material moves under the influence of dipoles induced by the electric field. If the suspended material is more polar than the medium in which it is suspended, it will move toward the region of highest field intensity, and if the suspended material is less polar than the medium, it will move toward the region of lowest field intensity. Dielectric distribution will give useful separations. The dielectric distributions of phosphatide micells in petroleum ether and of a mineral oil emulsion in water were studied in a nonuniform radial field produced by a cylindrical condenser. The central and peripheral portions of the cylinder could be drained separately, and the concentrations in the two portions could be determined. The effect of time, voltage, and concentration on the distribution was studied. A theory was proposed to predict the distribution of material in a cylindrical condenser at equilibrium.