Martin W Hobin

50230590, Jun 11, 1991

Nov 2, 1988

7/266394

Edwin J. Bielecki - Boyertown PA
Karl A. Romberger - Gilbertsville PA
Bart F. Bakke - Douglassville PA
Martin A. Hobin - Allentown PA
Charles R. Clark - Pottstown PA

B01D 1100

423 9

A metallurgical processing system for economically recovering metal values, such as columbium, tantalum, thorium, and uranium from dilute source solids, such as digestion sludges, by a series of steps including: 1) slurrying the source solids with dilute hydrofluoric acid to produce a solid phase and a liquid phase containing dissolved tantalum and columbium, then extracting tantalum and/or columbium from the liquid phase by means of a liquid ion-exchange process and then, additionally; 2) roasting the solid phase with sulfuric acid to recover and recycle hydrofluoric acid, leaching the roasted solids with dilute sulfuric acid to produce a disposable solid phase and a liquid phase containing thorium and uranium, and extracting thorium and uranium from the liquid phase by means of a liquid-liquid amine extraction process.

40338380, Jul 5, 1977

May 19, 1976

5/687885

Isadore Mockrin - Plymouth Meeting PA
Martin A. Hobin - Allentown PA

Kawecki Berylco Industries, Inc. - Reading PA

C25B 122
C25C 112

204103

An electrolytic process for the recovery of copper and regeneration of nitric acid from a waste liquor containing the same comprising adjusting the nitrate and hydronium ion concentrations in the liquor to between about 2 to 12 moles per liter and between about 0. 5 to 6 moles per liter, respectively, and subjecting the liquor to electrolysis at a temperature of between about 0. degree. to 55. degree. C. using anodes resistant to oxidation.