Collector Compositions and Methods of Using the Same

A collector composition comprising:

• a) one or more of a first collector comprising an organic primary, secondary, tertiary or quaternary ammonium salt of an organic sulfur-containing acid selected from the group consisting of hydrocarbyl dithiophosphoric acids, hydrocarbyl monothiophosphoric acids, mercaptobenzothiazoles, hydrocarbyl xanthic acids, hydrocarbyl dithiocarbamic acids, hydrocarbyl thioglycolic acids, hydrocarbyl trithiocarbonic acids, hydrocarbyl dithiophosphinic acids and hydrocarbyl monothiophosphinic acids;
• and
• b) at least one second collector selected from the group consisting of neutral collectors and organic ammonium salts of organic sulfur-containing acids, wherein the organic ammonium salt of a sulfur-containing acid of the second collector is different from said first collector,
• with the proviso that when the first collector comprises a primary or secondary ammonium salt of an organic sulfur-containing acid and the second collector is a neutral collector, the neutral collector is selected from the group consisting of dihydrocarbyl thionocarbamates, dihydrocarbyl thioureas, dihydrocarbyl sulfides, trihydrocarbyl dithiocarbamates, N-hydrocarbyl-S-hydrocarbyl dithiocarbamates, dihydrocarbyl guanidines, S-hydrocarbyl dithiophosphinates, S-hydrocarbyl dithiophosphates, S-hydrocarbyl mercaptobenzothiazoles, O-hydrocarbyl monothiophosphates, and O-hydrocarbyl monothiophosphinates.