Patents

3,872,209 Ion exchange process for the recovery of metals
3,857,919 Separating metal values by selective extraction
3,853,981 Liquid ion exchange process for the recovery of metals
3,777,004 Process for heap leaching ores
3,770,414 Recovery of rhenium and molybdenum values from molybdenite concentrates
3,767,543 Process for the electrolytic recovery of copper from its sulfide ores
3,736,238 Process for the recovery of metals from sulfide ores through electrolytic dissociation of the sulfides
3,709,680 Process for removal of arsenic from sulfo-ore
3,681,931 Treatment of phosphate rock slimes by freezing
3,681,016 Recovery of rhenium and molybdenium values from solution
3,676,106 Ion exchange process for the recovery of metals with cation exchange agents
3,647,361 Two-stage countercurrent leaching process for the recovery of phosphates, yttrium and rare earth values
3,615,170 Process for separating metals using double solvent extraction with bridging solvent medium
3,477,928 Process for the recovery of metals
3,425,799 Recovery of phosphate values from phosphatic slimes
3,376,103 Process for roasting vanadium ores
3,372,982 Method of recovery of vanadium from its ores
3,359,067 Method for the recovery of calcium phosphates from high lime content phosphate ores
3,357,821 Process for extracting metal values
3,333,924 Recovery of acids

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