Method of producing iron ore concentrates by froth flotation

US5540336A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Berthold Schreck · Goldkronach, DE
• Rita Koester · Goldkronach, DE

Key dates

• Filing date: Apr 4, 1994
• Grant date: Jul 30, 1996
• Expiry date: Apr 4, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B03D2203/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Iron ore concentrates can be obtained by the flotation of iron ores providing mixtures containing at least one ether canine of formula (I): EQU R.sup.1 O--(C.sub.n H.sub.2n).sub.y --NH--(C.sub.m H.sub.2m --NH).sub.x H, in which R.sup.1 is a linear or branched chain aliphatic hydrocarbon moiety having 6 to 22 carbon atoms and 0, 1, 2 or 3 double bonds; n and m independently of one another represent the number 1, 2 or 3; x=0 or the number 1, 2 or 3; and y=2 or 3, and at least one other anionic and/or nonionic collector.