Abstract: The present invention relates a flotation reagent for sulfidic ores, containing at least one compound of formula (1), wherein R2, R3, R4, R5, R6 and R7, independent of one another, represent hydrogen or groups containing 1 to 15 carbon atoms or groups containing oxygen or nitrogen, and at least another compound serving as collector and containing at least one sulfur atom that is directly bound to a carbon or phosphorus atom, wherein the carbon or phosphorus atom is directly bound to at least another sulfur atom or an oxygen atom.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms. Also disclosed is the process for preparing the above compound.

Abstract: A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formula where R1, R2 and R3 independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms.