Method and apparatus for capillary hydrodynamic fractionation

Details Method and apparatus for capillary hydrodynamic fractionation Method and apparatus for capillary hydrodynamic fractionation

1989-03-31

1992-02-18

Silverman, Stanley S.

Liquid purification or separation

With means to add treating material

Chromatography

210656, 210659, 422 70, 73 611C, 436161, 209 1, 209155, 209156, B01D 1508

Patent

active

050891260

ABSTRACT:
This invention provides an apparatus and method for the complete fractionation of submicron particles according to size by capillary hydrodynamic fractionation. This objective is achieved by using small diameter capillaries; introducing a minor fraction of a liquid dispersion of particles to be separated into at least one capillary fraction; passing the minor fraction through the capillary; and, at the exit of the capillary, diluting the minor fraction with the same liquid as is carrying the fractionated sample. These modifications in the flow patterns are essential to the use of capillaries with diameters smaller than 60 microns. This invention is especially adapted for rapid analytical separation of not only rigid colloidal particles but also of soft latexes.

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"An Analysis of Flow Separation in Hydrodynamic Chromatography of Polymer Latexes", AIChE Journal, vol. 24, No. 2, pp. 204-212, Mar. 1978.
"Separation by Flow", DiMarzio et al., 1970.
"Separation of Submicrometer Particles by Capillary Hydrogynamic . . . ", Silebi et al., 4/3/89.

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