Inventor

VOGT MARTIN C

US10 patents

Patents

10 patents

US5417945AMay 23, 1995

Process for recovering tungsten as an ammoniacal tungstate compound in which ammoniacal tungstate liquors are reclaimed

GTE PROD CORP9 citations73

US4353881AOct 12, 1982

Tungsten recovery from tungsten ore concentrates by caustic digestion

GTE PROD CORP7 citations71

US4552729ANov 12, 1985

Method for removing tin from sodium tungstate solution

GTE PROD CORP3 citations62

US4448755AMay 15, 1984

Method for removal of tin from ammonium tungstates

GTE PROD CORP5 citations62

US4379126AApr 5, 1983

Process for recovering tungsten values from alkali solutions

GTE PROD CORP4 citations62

US4374099AFeb 15, 1983

Recovery of tungsten values from alkali tungstate solutions by solvent extraction

GTE PROD CORP5 citations62

US4369165AJan 18, 1983

Recovery of tungsten values from alkali tungstate solutions by solvent extraction

GTE PROD CORP5 citations62

US4560539ADec 24, 1985

Removal of ammonia from sodium tungstate solutions

GTE PROD CORP2 citations60

US4360503ANov 23, 1982

Recovery of tungsten values from alkali tungstate solutions by solvent extraction

GTE PROD CORP4 citations60

US5164171ANov 17, 1992

Removal of carbonate from caustic sulfide solution

GTE PROD CORP0 citations51