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US 4,053,386 AGranted
Electrolytic filter for electrolytically filtering and recovering metals from colloidal suspensions
AssigneeAmetek, Inc.
InventorFerenc J. Schmidt
Life of this patent
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AssigneeAmetek, Inc.
InventorFerenc J. Schmidt
Estimating the term…
An electrolytic filter, consisting of perforated conductive electrodes isolated by a separator, is adapted to filter at the first electrode or cathode suspended materials, including colloidal metal particles such a silver or gold made colloidal by borohydride, zinc, iron, etc., reduction or sulfide, etc., precipitation of metallic ion-containing solutions. The method of recovery involves use of the electrolytic filter and a composition including the finely divided metal containing waste solution in combination with floc forming compounds such as alkaline earth metal hydroxide, and negative charge imparting additives such as soluble phosphates and anionic resin flocculating agents. Preferably, the filter includes a floc circulating chamber in which the incoming liquid assumes a vertical toroidal flow pattern.
An electrolytic filter comprising two electrically conductive vertically disposed sheet porous members, means adapted to cause an electrolytic fluid carrying suspended solids to be separated therefrom, to pass through a first one of said conductive members from an inlet side to an outlet side thereof where the removal of solids is completed on the inlet side thereof, and then through a second one of said conductive members, and means adapted to establish an electrolytic current between said first member, as cathode, and said second member, as anode, through said electrolytic fluid flowing therebetween, said filter adapted to accomplish said removal by the formation of flocs in the space adjacent said cathode on the inlet side thereof and to facilitate the removal and collection of said flocs by upward fluid flow parallel to said cathode adjacent its inlet side induced at least in part by electrolytically generated gas thereat.
An electrolytic filter for a waste treatment system through which electrolytic fluid is adapted to flow comprising:
Dependencies are inferred from the claim text.