Collectors for froth flotation including oxidized fatty acid compositions and oxidized and maleated compositions. In particular, use of oxidized tall oil compositions and oxidized and maleated fatty acid compositions are disclosed.
1. A method of froth flotation for the beneficiation of an ore, the method comprising:
contacting a slurry comprising an ore with a collector, wherein the collector comprises one or more compounds or salts thereof having at least two C 10 -C 24 structures crosslinked by an ether linkage; and
recovering a beneficiated ore.
2. A method according to claim 1 , wherein the at least two C 10 -C 24 structures comprise clean fatty acids, tall oil fatty acids, or mixtures thereof.
3. A method according to claim 1 , wherein the at least two C 10 -C 24 structures comprise tall oil fatty acids.
4. A method according to claim 1 , wherein the collector is an anionic collector.
5. A method according to claim 4 , wherein the anionic collector has a counter cation chosen from Li + , Na + , K + , NH 4 + , alkyl ammonium ions, and imidazoline cations.
6. A method according to claim 1 , wherein the at least two C 10 -C 24 structures comprise clean fatty acids, wherein the clean fatty acids does not contain one or more of tall oil pitch, an amine, or sarcosine.
7. A method according to claim 1 , wherein a grade of the beneficiated ore is greater than a grade of a beneficiated ore recovered with a comparative collector comprising one or more compounds or salts thereof having at least two C 10 -C 24 structures not crosslinked by an ether linkage.
8. A method according to claim 1 , wherein at least one of the C 10 -C 24 structures is substituted by at least one α,β unsaturated carboxylic acid or anhydride.
9. A method according to claim 1 , wherein the ore is chosen from phosphate, barite, fluorite, feldspar, potash, fluorspar, magnesite, scheelite, celestite, anglesite, alunite, bauxite, gypsum, kainite, biotite, calcite, dolomite, albite, orthoclase, microcline, fluorspar, gypsum, anhydrite, columbite, tantalite, pyrochlore, apatite, cassiterite, wolframite, rutile, ilmenite, hematite, and kaolin.
10. A method according to claim 9 , wherein the beneficiated ore is phosphate.
11. A method according to claim 9 , wherein the beneficiated ore is potash.
12. A method according to claim 1 , wherein the method further comprises use of a frothing agent.
13. A method according to claim 1 , wherein the method further comprises use of a depressant.
14. A method according to claim 1 , wherein the collector has at least one characteristic chosen from: the collector comprises less than 2.5% by weight of a plant-derived amine, the collector comprises at least 65% by weight of a fatty acid, the collector, comprises less than 5% by weight of a tall oil pitch, the collector, comprises less than 20% by weight of a fuel oil or furnace oil, and the collector has an acid value of at least about 80.
15. A method according to claim 3 , wherein the collector has an acid value of at least about 110.
16. A method according to claim 3 , wherein the collector has an acid value ranging from about 120 to about 150.
17. A method according to claim 1 , wherein a yield of the beneficiated ore is greater than a yield of a comparative beneficiated ore recovered with a comparative collector comprising one or more compounds or salts thereof having at least two C 10 -C 24 structures not crosslinked by an ether linkage.
18. A method according to claim 3 , wherein the collector has less than 20% by weight of a fuel oil.
19. A method according to claim 8 , further comprising collecting the mineral and providing one or more of: a yield of the mineral which is higher than a yield of the mineral provided by a fatty acid composition, and a grade of the mineral which is higher than a grade of the mineral provided by a fatty acid composition.
20. A method according to claim 8 , wherein the collector has an acid value of at least about 110.
21. A method of froth flotation comprising:
contacting an aqueous slurry comprising a mineral and gangue with a first collector, wherein the first collector comprises one or more compounds or salts thereof having at least two C 10 -C 24 structures crosslinked by an ether linkage made by sparging air through a reaction mixture composed of tall oil fatty acids at a temperature of at least 150° C.; and
separating the mineral from the gangue.
22. A method according to claim 21 , wherein the reaction mixture is heated to a temperature of about 160° C. to about 170° C.
23. A method according to claim 21 , wherein the mineral is phosphate.
24. A method according to claim 21 , wherein the at least two C 10 -C 24 structures crosslinked by an ether linkage are reacted with maleic anhydride or maleic acid such that at least one of the C 10 -C 24 structures is substituted by at least one α,β unsaturated carboxylic acid or anhydride.