Rotor for sedimentation field flow fractionation
AssigneeE. I. Du Pont de Nemours and Company
InventorsCharles H. Dilks, Jr., Joseph J. Kirkland, Wallace W. Yau
Life of this patent
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Abstract
A long, thin annular belt-like channel is designed for use in sedimentation field flow fractionation. The channel has a generally rectangular cross section and a width to thickness aspect ratio lying in the range of 3-50 to 1. The channel may be formed of a flattened capillary tube. The ratio of the thickness of the channel to the characteristic height of the particles to be separated is greater than 5 to 1.
Claims6
An apparatus for separating particulates suspended in a fluid medium according to their effective masses, said apparatus having an annular cylindrical channel with a cylinder axis, said channel being sufficiently thin in the radial dimension to effect laminar flow therein, means for rotating said channel about said axis, means for passing said fluid medium circumferentially through said channel, and means for introducing said particulates into said medium for passage through said channel, the improvement wherein
- said channel is generally rectangular in crosssection and has a width to thickness aspect ratio lying in the range 3-50 to 1.
Dependencies are inferred from the claim text.