The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2007
Filed:
Apr. 16, 2000
Magnus Svensson, Stora Höga, SE;
Jan Olof Gustafsson, Kungålv, SE;
Anders Klingberg, Henån, SE;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The present invention relates to a froth flotation process in which silicates are separated from an iron ore in the presence of a collector containing a quaternary ammonium compound having the formula RRNRR1/z X(I), in which the groups Rindependently are hydrocarbon groups, preferably aliphatic groups containing 6-14 carbon atoms and/or the group R—(OR)—OR—, where the groups Rindependently are acyl groups containing 6-14 carbon atoms, the groups Rindependently are alkylene groups containing 2-4 carbon atoms, the groups Rindependently are alkylene groups containing 2-3 carbon atoms and m is a number from 0-5, Rand Rindependently are alkyl groups containing 1-4 carbon atoms or groups (RO)H, where the groups Rindependently are alkylene groups having 2-4 carbon atoms and p is a number from 1-4, X is an anionic group, and z is the charge of the anion X. This collector has a high selectivity to concentrate silicates in the froth product, while a high yield of iron minerals is maintained in the bottom concentrate or concentrates.