Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2005-06-21
2005-06-21
Lawrence, Frank M. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S748080, C210S763000, C210S909000, C204S158200, C405S128100, C588S304000
Reexamination Certificate
active
06908559
ABSTRACT:
A process for treating a solid-liquid mixture by cavitation to decompose at least some contaminant associated with the solid particles, the contaminant either being absorbed into the pores of the solid or onto the surface of the solid particles. The process includes the step of subjecting the mixture to cavitation such that a portion of the contaminant is chemically decomposed. Typically the chemical decomposition occurs at the surface of the solid particle. Typically the cavitation process is an ultrasonic treatment step, although other cavitation processes are applicable, for example high shear mixing. The cavitation effect is capable of achieving physico-chemical changes at the particle surfaces. The localized high temperatures on bubble collapse (as high as 5000K) can decompose contaminant substances such as PCB and other hazardous materials including polybrominated biphenyl PBB), organochloride and organophosphate compounds, pesticides and the like.
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Commonwealth Scientific and Industrial Research Organisation
Lawrence Frank M.
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