Particle separation

Details Particle separation Particle separation

1985-07-05

1987-06-16

Castel, Benoit

Liquid purification or separation

Processes

Utilizing electrical or wave energy directly applied to...

436177, 435261, 209 1, 20415715, B01D 1706, C02F 136

Patent

active

046735127

ABSTRACT:
The separation of different types of particulate matter in a carrier liquid is obtained by using an ultrasonic standing wave and relying on the different acoustic responses of the different particle types. By varying the acoustic energy propagation cyclically a more effective separation rate can be obtained, with a more readily attracted particle type being subjected to a further discrimination step in each cycle. The cyclical energy variation may be in the intensity of the standing wave, e.g. using suppression means, and/or the velocity of the standing wave relative to the liquid medium, e.g. using phase control means.

REFERENCES:
patent: 2215484 (1940-09-01), St. Clair
patent: 3837147 (1976-09-01), Brunnee
patent: 4055491 (1977-10-01), Porath-Furedi
patent: 4280823 (1981-07-01), Szonntagh
patent: 4475921 (1984-10-01), Barmatz
patent: 4523682 (1985-06-01), Barmatz et al.

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