FLOTATION AGENT FOR IRON ORE CONTAINING MAGNETITE AND/OR HAEMATITE Russian patent published in 2015 - IPC B03D1/01 B03D101/02 B03D103/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a floatation agent for iron ore containing magnetite and/or haematite. Use of a composition containing A) at least one amine alkoxylate ester of formula (1) or a salt thereof: , where A, B are independently a C₂-C₅-alkylene radical, R¹ -C₈-C₂₄-alkyl or -alkenyl radical, R², R³, R⁴ are independently H or a C₈-C₂₄-acyl radical under the condition that at least one of the radicals R², R³ or R⁴ is a C₈-C₂₄-acyl radical, x, y, z are independently an integer from 0 to 50 under the condition that x+y+z yields an integer from 1 to 100, and B) a compound of formula D-NH₂, where D is a hydrocarbon radical having 1 to 50 carbon atoms, which may contain either an oxygen atom or an oxygen atom and a nitrogen atom in amount of 10 to 5000 g/t as a collecting agent for reverse floatation of iron ore containing magnetite, haematite or both, calcite, phosphate ore and feldspar.

EFFECT: high efficiency of floatation.

18 cl, 1 tbl