Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2008-01-15
2008-01-15
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C423S070000, C423S071000, C423S598000, C423S636000, C428S403000
Reexamination Certificate
active
10917829
ABSTRACT:
The present invention provides a method of removing spectator ions and contaminants from aqueous suspensions of solid particles. In accordance with the method of the invention, the solid particles are transported across a phase boundary into a non-polar organic solvent, leaving the spectator ions and contaminants in the aqueous phase. To facilitate the efficient transportation of the solid particles across the phase boundary, the surface of the solid particles is coated with an amphiphilic polyelectrolyte. If desired, the solid particles can be recovered from the organic phase by evaporating the organic solvent.
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Adair James H.
Chu Mike S. H.
Feng Xiangdong
Rast, III Heber E.
Szepesi Christopher J.
Drodge Joseph
Ferro Corporation
Rankin, Hill Porter & Clark LLP
The Penn State Research Foundation
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