Steric field-flow fractionation

Details Steric field-flow fractionation Steric field-flow fractionation

1978-10-23

1980-07-29

Hill, Ralph J.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 1, 210 31C, B03B 500

Patent

active

042149819

ABSTRACT:
A steric field-flow fractionation system including a flow channel adapted for use with a carrier stream of fluid having particles suspended therein and a force field disposed across the flow channel to cause migration of the particles to a restraining wall, thereby forming layers of particles at the restraining wall. The strength of the force field is adjusted sufficiently high to maintain the particles of a given class at the restraining wall such that particle distance from the wall is a function of steric hindrance. Particle displacement by flow along the channel is thereby determined by particle size, permitting fractionation of the particles based on differential migration of the various sizes of particle classes.

REFERENCES:
patent: 3272341 (1966-09-01), Hukki
patent: 3449938 (1969-06-01), Giddings
patent: 3865717 (1975-02-01), Small
patent: 3886064 (1975-05-01), Kosonen
patent: 4066536 (1978-01-01), Ball et al.

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