Flotation reagent for silicates
View Patent ↗This invention relates to the use of a compound of the formula (I) where R 1 is a hydrocarbon group having 1-40 carbon atoms, R 2 is an aliphatic hydrocarbon group having 2-4 carbon atoms, and also R 3 is an alkoxy group, n is in the range from 1 to 50, and m is 1 or 2, as flotation reagent in silicate flotation R 1 —O—R 2 —NH (2-m) —[(R 3 ) n —H] m (I).
1. A method for flotation of a silicate-containing mineral, wherein the method comprises the step of contacting the silicate-containing mineral with a flotation reagent comprising a compound of the formula (I)
R 1 —O—R 2 —NH (2-m) —[(R 3 ) n —H] m (I)
where R 1 is an aliphatic hydrocarbon group having 8-22 carbon atoms, R 2 is an aliphatic hydrocarbon group having 2-4 carbon atoms, and also R 3 is an alkoxy group, n is a number between 1 and 50, and also m is 1 or 2.
2. The method of claim 1 , wherein R 1 is an aliphatic hydrocarbon radical having 8 to 14 carbon atoms.
3. The method of claim 1 , wherein R 1 is a radical selected from the group consisting of 2-ethylhexane, isononane, isodecane and isotridecane radical.
4. The method of claim 1 , where R 1 is an isotridecane radical, R 2 is C 3 H 6 , R 3 is C 2 H 4 —O, n is 2 to 10 and m is 2.
5. A method for the flotation of silicate from iron ore, wherein the method comprises the step contacting the iron ore with a flotation reagent comprising a compound of the formula (I)
R 1 —O—R 2 —NH (2-m) —[(R 3 ) n —H] m (I)
where R 1 is an aliphatic hydrocarbon group having 8-22 carbon atoms, R 2 is an aliphatic hydrocarbon group having 2-4 carbon atoms, and also R 3 is an alkoxy group, n is a number between 1 and 50, and also m is 1 or 2, and a further nitrogenous silicate collector at a pH of 7-12, where the further nitrogenous silicate collector is selected from the group consisting of alkyl ether amines, alkyl ether diamines, alkylamines and quaternary ammonium salts.
6. The method of claim 1 , wherein the silicate-containing mineral is iron ore.
7. The method of claim 1 , wherein the silicate-containing mineral is selected from the group consisting of iron ore, calcite, phosphate ore and feldspar.
8. The method of claim 1 , wherein the silicate-containing mineral comprises a finite amount of silicate between 0 and 90% silicate.
9. The method of claim 1 , wherein the flotation reagent further comprises a frother or a depressant or a mixture thereof.
10. The method of claim 1 , wherein said contacting occurs in a pH range of 7 to 12.
11. The method of claim 1 , wherein the flotation reagent is present in an amount of 0.001 to 1.0 kg per ton of crude ore.