Patents

4,402,919 Process for the regeneration of mineral acids used to solubilize phosphate ores
4,398,945 Process for producing a ferronickel alloy from nickel bearing laterites
4,396,423 Process for recovering iron and zinc from steel making dusts
4,372,755 Production of a fuel gas with a stabilized metal carbide catalyst
4,341,744 Soda ash production
4,329,223 Flotation of molybdenite
4,310,490 Apparatus for enriching the iron carbonyl content of a recycle gas stream
4,302,427 Recovery of uranium from wet-process phosphoric acid
4,289,529 Process for beneficiating sulfide ores
4,289,528 Process for beneficiating sulfide ores
4,288,414 Process for chlorinating clays and bauxite
4,283,277 Beneficiation of trona by flotation
4,276,084 Hydrometallurgical process for the recovery of lead
4,276,081 Process for beneficiating ores
4,268,380 Froth flotation process
4,257,881 Process for beneficiating oxide ores
4,257,781 Process for enhancing the fuel value of low BTU gas
4,250,157 Method and apparatus for enriching the iron carbonyl content of a recycle gas stream
4,244,927 Process for recovering arsenic compounds by sodium hydroxide leaching
4,244,735 Chloride leach process for recovering metal values in the presence of arsenic

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