Douglas Allen Robinson

US Patent:

44420730, Apr 10, 1984

Filed:

May 21, 1982

Appl. No.:

6/380859

Inventors:

Douglas J. Robinson - Tucson AZ
Aniedi O. Ette - Tucson AZ

Assignee:

University Patents, Inc. - Norwalk CT

International Classification:

C01G 3714
C01G 5300

US Classification:

423 54

Abstract:

A method for recovering superalloy scrap is disclosed. The method involves oxidizing superalloy scrap in an aqueous acidic medium. The aqueous acidic medium has an oxidation potential sufficient to oxidize nonferrous additive superalloy elements to insoluble oxides thereof and to oxidize major superalloy constituents to aqueously soluble species. The insoluble solids from the aqueous solution are separated when the aqueous solution is extracted with an aqueously substantially insoluble tertiary amine to form an organic phase and an aqueous phase. The aqueous phase contains essentially nickel and chromium values. The organic phase is sequentially extracted with aqueous solutions which selectively solubilize individual metal value species to form individual aqueous solutions having substantially single metal value species therein. The metal value species solutions are processed to obtain substantially pure metals.

US Patent:

46197516, Oct 28, 1986

Filed:

Apr 24, 1985

Appl. No.:

6/726507

Inventors:

Douglas J. Robinson - Tucson AZ

International Classification:

C25C 704

US Classification:

204267

Abstract:

A plastic insulator extending around and conforming to the shape of a header bar supporting a lead electrowinning anode includes legs that extend from the top of the header bar downward along the opposite faces of the anode to a level below the bottom edge of the anode, whereat the lower ends of the legs are joined. The upper, outer side surfaces of the insulator are sloped to prevent shorting of cathodes with the anode header bar during loading and removal of the cathodes. In one described embodiment of the invention, the insulator is hairpin-shaped with the lower ends thereof joined by a plastic retaining pin. In another embodiment of the invention, a U-shaped lower section is attached in a telescoping fashion to the lower ends of the legs of the insulator. In one embodiment of the invention, an upper portion of the insulator extends substantially above the top of the anode header bar to guide cathodes between the anodes during loading and removal of the cathodes.