Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1993-06-02
1995-02-14
Drodge, Joseph W.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210 94, 210789, 422 72, 422 8205, 436 45, B01D 17038, B01D 1712
Patent
active
053892658
ABSTRACT:
A tube and method of partitioning a pre-selected phase of a sample of liquid having a plurality of phases of differing densities. The tube has a smaller diameter at one end. In use, a sample of liquid is passed through a first end of a linear tube and into a first chamber of said tube. The first chamber is located at the first end of the tube and is separated from a second chamber located at a second opposed end of the tube by a separation device. The separation device slidably engages the interior surface of the tube in an essentially fluid-tight manner and has a flow-restriction orifice therein to permit fluid flow communication between the first and second chambers under the influence of force. The phases are then ordered within the tube using e.g. axial centrifugation. The volume of the first chamber is reduced by movement of the separation device within the tube, such that one phase of the liquid in the first chamber flows through the flow-restriction orifice and into the second chamber. The method is monitored using the section of the tube that has the smaller diameter.
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Drodge Joseph W.
E. I. Du Pont de Nemours and Company
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