Amine and diamine compounds and their use for inverse froth flotation of silicate from iron ore

摘要

The invention relates to a process for enriching an iron mineral from a silicate containing iron ore by inverse flotation comprising the addition of a collector or collector composition comprising at least one of the compounds of formulae RO—X—NH₂ (Ia); RO—X—NH₃⁺Y⁻ (Ib); RO—X—NH—Z—NH₂ (IIa); and RO—X—NH—Z—NH₃⁺Y⁻ (IIb), in which X is a linear or branched aliphatic alkylene group containing 2 to 6 carbon atoms; Z is a linear or branched aliphatic alkylene group containing 2 to 6 carbon atoms; Y− is an anion; and R is an aliphatic group of the formula (I) C₅H₁₁CH(C₃H₇)CH₂— (I) wherein the C₅H₁₁ moeity of the aliphatic group of the formula (I) comprises 70 to 99% by weight n-C₅H₁₁—, and 1 to 30% by weight C₂H₅CH(CH₃)CH₂— and/or CH₃CH(CH₃)CH₂CH₂—.RO—X—NH₂  (Ia)RO—X—NH₃⁺Y⁻  (Ib)RO—X—NH—Z—NH₂  (IIa)RO—X—NH—Z—NH₃⁺Y⁻  (IIb)C₅H₁₁CH(C₃H₇)CH₂—  (I)