Chemistry: physical processes – Physical processes – Crystallization
Patent
1975-08-11
1977-08-23
Rutledge, L. Dewayne
Chemistry: physical processes
Physical processes
Crystallization
232705R, 75121, 75 1R, 134 83, 209173, 266101, 423 27, 423 41, 4236585, B01D 1100, B01D 5924
Patent
active
040437604
ABSTRACT:
A counter current decantation system for the fluid separation of liquids or solids having different densities or absorptive capacities wherein the material to be separated is placed in an inclined separator having a series of decantation pipes, each of which is connected at the bottom thereof to a pump for pumping a fluid mixture upstream at varying pressures. The separation fluid enters the separator at the bottom with sufficient force to form a mixture with and agitate the material to be separated. Lighter material is caused to rise toward the fluid surface and the heavier material is caused to settle to the separator floor by gravity. The force supplied is sufficient to cause the fluid mixture to pass forwardly through the length of the separator and thus the fluid mixture has a tendency to flow downstream toward the bottom end of the separator. The upper portion of the fluid mixture containing the absorbed or lighter particles flows into the decantation pipes and is then pumped upwardly past the next adjacent decantation pipe and deposited back into the fluid mixture. By using such a "leap-frog" pumping system the fluid material passing upwardly throughout the length of the separator becomes concentrated in the lighter material to be separated or absorbed and can there be removed at a point near the upper end of the separator. On the other hand, the heavier material flows downwardly along the floor of the inclined separator and is expelled at the lower end.
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patent: 2765913 (1956-10-01), Weiss et al.
patent: 3083126 (1963-03-01), Griffiths
patent: 3339730 (1967-09-01), Boutin et al.
Lewis Michael L.
Rutledge L. Dewayne
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