Liquid purification or separation – Processes – Utilizing electrical or wave energy directly applied to...
Patent
1990-12-17
1992-09-15
Theisen, Mary Lynn
Liquid purification or separation
Processes
Utilizing electrical or wave energy directly applied to...
55 15, 55277, 210222, 210223, 210695, 210767, 210806, B01D 3506, B01D 1706, B01D 1508
Patent
active
051475626
ABSTRACT:
A method and apparatus are provided for acoustophoresis, i.e., the separation of species via acoustic waves. An ultrasonic transducer applies an acoustic wave to one end of a sample container containing at least two species having different acoustic absorptions. The wave has a frequency tuned to or harmonized with the point of resonance of the species to be separated. This wave causes the species to be driven to an opposite end of the sample container for removal. A second ultrasonic transducer may be provided to apply a second, oppositely directed acoustic wave to prevent undesired streaming. In addition, a radio frequency tuned to the mechanical resonance and coupled with a magnetic field can serve to identify a species in a medium comprising species with similar absorption coefficients, whereby an acoustic wave having a frequency corresponding to this gyrational rate can then be applied to sweep the identified species to one end of the container for removal.
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Kim Sun Uk
Osborne Kevin B.
The United States of America as represented by the Administrator
Theisen Mary Lynn
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