Clariant Finance (bvi) Limited

Clariant International Ltd

Uwe Dahlmann

Klaus-Ulrich Pedain

The invention relates to the use of a composition of A) at least one quaternary ammonia compound comprising at least one organic radical bonded to the ammonia nitrogen atom and optionally comprising heteroatoms and having 1 to 36 carbon atoms, and B) at least one amine alkoxylate ester of formula (1) or a salt thereof, where A, B are, independently of each other, a C- through C-alkylene radical R, a C- through C-alkyl radical or alkenyl radical R, R, Rindependent of each other, H, or a C- through C-acyl radical, with the stipulation that at least one of the radicals R, Ror Rstands for a C- through C-acyl radical, and x, y, z, independently of each other, stand for a whole number from 0 through 50, with the stipulation that x+y+z is a whole number from 1 through 100, in quantities of 10 through 5000 g/tonne of ore as a collector in silicate floation.

Mixture of an amine alkoxylate ester and a quaternary ammonium compound as a collector for minerals containing silicate

The present invention relates to a flotation reagent for iron ores containing magnetite and/or haematite and to the use of a composition containing A) at least one amine alkoxylate ester of formula (I) or a salt thereof, wherein A and B, independently of one another, represent a C-Calkylene radical, Ris a Cto Calkyl or alkenyl radical, R, Rand R, independently of one another, are H or a Cto Cacyl radical, with the proviso that at least one of the radicals R, Ror Rstands for a Cto Cacyl radical, x, y and z, independently of one other, are an integer of from 0 to 50, with the proviso that x+y+z is an integer of from 1 to 100, and B) a compound of formula D-NH, in which D stands for a hydrocarbon radical having from 1 to 50 carbon atoms, which can contain either an oxygen atom or an oxygen atom and a nitrogen atom, in amounts of 10 to 5.000 g/tonne as a collector in the reverse flotation of iron ore containing magnetite, haematite or both.

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Mainz, Germany

Uwe Dahlmann