Surfactant mixtures as collectors for the flotation of non-sulfidic ores
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsRita Koester, Wolfgang von Rybinski
Life of this patent
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Abstract
Mixtures of (a) at least one alkyl or alkenyl polyethylene glycol ether which is terminally blocked by a hydrophobic radical, and (b) at least one anion-active surfactant are used as collectors in the flotation of non-sulfide ores.
Claims16
In a process for the froth flotation of a mineral-containing non-sulfidic ore using an anion-active surfactant as collector for the mineral, the improvement comprising the use therein of at least one alkyl or alkenyl polyethylene glycol ether which is terminally blocked by a hydrophobic radical as a co-collector for the mineral, wherein the at least one alkyl or alkenyl polyethylene glycol ether has the formula:
- R.sup.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.2 (I)
- wherein R.sup.1 is a straight-chain or branched alkyl or alkenyl radical having 8 to 22 carbon atoms, R.sup.2 is a benzyl radical or a straight-chain or branched C.sub.1 -C.sub.8 alkyl radical, and n is a number of from 2 to 15.
A process for the separation of a mineral-containing non-sulfidic ore by froth flotation comprising the steps of:
- (a) mixing the non-sulfidic ore in ground form with water to form a suspension;
- (b) introducing air into the suspension in the presence from about 50 to about 2000 g/t of ore of a collector mixture containing
- (i) at least one alkyl or alkenyl polyethylene glycol ether which is terminally blocked by a hydrophobic radical wherein the at least one alkyl or alkenyl polyethylene glycol ether has the formula:
- R.sup.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.2 (I)
- wherein R.sup.1 is a straight-chain or branched alkyl or alkenyl radical having 8 to 22 carbon atoms, R.sup.2 is a benzyl radical or a straight-chain or branched C.sub.1 -C.sub.8 alkyl radical, and n is a number of from 2 to 15, and
- (ii) at least one anion-active surfactant, wherein the weight ratio of component (i) to component (ii) is from about 1:20 to about 3:1 to form a froth containing the mineral;
- and
- (c) removing the mineral-containing froth.
Dependencies are inferred from the claim text.