OA18442A - Composition of fatty acids and N- acyl derivatives of sarcosine for the improved flotation of nonsulfide minerals - Google Patents
Composition of fatty acids and N- acyl derivatives of sarcosine for the improved flotation of nonsulfide minerals Download PDFInfo
- Publication number
- OA18442A OA18442A OA1201700398 OA18442A OA 18442 A OA18442 A OA 18442A OA 1201700398 OA1201700398 OA 1201700398 OA 18442 A OA18442 A OA 18442A
- Authority
- OA
- OAPI
- Prior art keywords
- saturated
- fatty acid
- composition
- monounsaturated
- nonsulfide
- Prior art date
Links
- 235000014113 dietary fatty acids Nutrition 0.000 title claims abstract description 87
- 239000000194 fatty acid Substances 0.000 title claims abstract description 87
- 150000004665 fatty acids Chemical group 0.000 title claims abstract description 87
- 239000000203 mixture Substances 0.000 title claims abstract description 87
- 229940043230 Sarcosine Drugs 0.000 title claims abstract description 14
- 108010077895 Sarcosine Proteins 0.000 title claims abstract description 14
- 238000005188 flotation Methods 0.000 title claims description 25
- 229910052500 inorganic mineral Inorganic materials 0.000 title 1
- 239000011707 mineral Substances 0.000 title 1
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 34
- 238000009291 froth flotation Methods 0.000 claims abstract description 12
- 125000004432 carbon atoms Chemical group C* 0.000 claims abstract description 7
- 239000003784 tall oil Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 14
- DIOYAVUHUXAUPX-KHPPLWFESA-N 2-[methyl-[(Z)-octadec-9-enoyl]amino]acetic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)N(C)CC(O)=O DIOYAVUHUXAUPX-KHPPLWFESA-N 0.000 claims description 12
- FSYKKLYZXJSNPZ-UHFFFAOYSA-N sarcosine zwitterion Chemical compound C[NH2+]CC([O-])=O FSYKKLYZXJSNPZ-UHFFFAOYSA-N 0.000 claims description 12
- 235000019864 coconut oil Nutrition 0.000 claims description 9
- 239000003240 coconut oil Substances 0.000 claims description 9
- 229910052586 apatite Inorganic materials 0.000 claims description 4
- NKTZYSOLHFIEMF-UHFFFAOYSA-N dioxido(dioxo)tungsten;lead(2+) Chemical compound [Pb+2].[O-][W]([O-])(=O)=O NKTZYSOLHFIEMF-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L Barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L Magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 239000010428 baryte Substances 0.000 claims description 3
- 229910052601 baryte Inorganic materials 0.000 claims description 3
- 239000011776 magnesium carbonate Substances 0.000 claims description 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 3
- 239000007900 aqueous suspension Substances 0.000 claims description 2
- 239000010436 fluorite Substances 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims 1
- 150000003568 thioethers Chemical class 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000004215 Carbon black (E152) Substances 0.000 description 13
- 150000002430 hydrocarbons Chemical class 0.000 description 13
- 238000011084 recovery Methods 0.000 description 11
- 235000013162 Cocos nucifera Nutrition 0.000 description 9
- 240000007170 Cocos nucifera Species 0.000 description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 235000019198 oils Nutrition 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 230000001143 conditioned Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 150000001735 carboxylic acids Chemical group 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 206010053317 Hydrophobia Diseases 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000994 depressed Effects 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- POULHZVOKOAJMA-UHFFFAOYSA-N Lauric acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- OYHQOLUKZRVURQ-IXWMQOLASA-N Linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 2
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Chemical compound CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000003750 conditioning Effects 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000001187 sodium carbonate Substances 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 Chemical class O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N Sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- -1 apatite Chemical class 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010192 crystallographic characterization Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000011872 intimate mixture Substances 0.000 description 1
- KEHCHOCBAJSEKS-UHFFFAOYSA-N iron(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Fe+2] KEHCHOCBAJSEKS-UHFFFAOYSA-N 0.000 description 1
- 235000020778 linoleic acid Nutrition 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
Abstract
This invention relates to a collector composition for the direct froth flotation of nonsulfide ores comprising a) 50 - 99 wt.-% of a mixture of tatty acids and b) 1 - 50 wt.% of an N-acyl derivative of sarcosine of the formula (I)
Description
This Invention relates to a novel collector composition comprising a mixture of at least two fatty acids and at least one N-acyl dérivative of sarcosine and its use ln the direct froth flotation of nonsulfide minerais: The use of the novel collector composition provides Improved flotation efficiency. ·
Froth flotation Is a physico-chemical process used to separate minerai particles considered economically valuable from those considered waste. It is based on the ability of air bubbles to selectively attach onto those particles previously rendered hydrophobie. The particle-bubble combinations then rise to the froth phase from where It discharges the flotation cell whilst the hydrophilic particles remain In the flotation cell. Particle hydrophobicity ïs, in tum, Induced by spécial chemlcals called collectors. In direct flotation Systems, it Is the economically valuable minerais which are rendered hydrophobie by the action of the collector. Similarly, in reverse flotation Systems, the collector renders hydrophobicity to those minerai particles considered waste. The efficiencyofthe séparation process is quantified in terms of recovery and grade. Recovery refers to the percentage of valuable product contained ln the ore that is removed into the concentrate stream after flotation. Grade refers to the percentage ofthe economically valuable product ln the concentrate after flotation. A higher value of recovery or grade indicates a more efficient flotation system.
The use of mixtures of fatty acids and sarcosine dérivatives for the froth flotation of nonsulfide minerais is well-known.
In DD-300730 the useof a collector composition for the froth flotation of fiuorite comprising an N-acyl dérivative of sarcosine and a saturated or unsaturated fatty acid having a hydrocarbon chain with 14 to 24 carbon atoms is described.
In US-5147528 a process for the direct flotation of phosphate Is described where an oxidized Intimate mixture of a fatty acid containing 12 to 36 carbon atoms, a tall oil pitch, an amine derived from a plant, sarcosine and a fuel oil orfumace oil is used as collecter.
US-4514290 describes a collecter composition comprising a fatty acid or sait thereof, an amidocarboxylic acid or amidosulfonic acid containîng an organic hydrophobie group, or a sait thereof, and a partial ester of phosphoric acid and at least one alkoxylated alcohol. Such composition Is claimed to show Improved efficiency for the fret h flotation of minerais containîng alkaline earth metals, such as apatite, scheelite, magnesite and barite. The fatty acid in the preferred compositions has 14 to 22 carbon atoms.
WO-2014040686 describes a flotation agent for phosphate ore, comprising at least one fatty acid and at least one N-acyl dérivative of sarcosine.
The présent invention is related to a novel collecter composition comprising a mixture of at least two fatty acids and at least one N-acyl dérivative of sarcosine and its use for the beneficiation of nonsulfide minerais. The composition of at least two fatty acids and at least one N-acyl dérivative according to the présent invention affords In comparison to the collecter compositions described by the state-of-the-art an improvement of the flotation efficiency. Under improved flotation efficiency is meant that higher minerai recovery and/or purity are achieved. Furthermore, the collecter composition according to the présent invention is very easy to préparé by simply mixing and not require any additional treatment, like for example an oxidation step, in order to show excellent Improvement of the flotation efficiency.
Unexpectedly it was found that a composition containîng 50 - 99 wt.-% of a mixture of at least two fatty acids and 1-50 wt.-% of an N-acyl dérivative of sarcosine show improved flotation of nonsulfide minerais expressed In terms of higher minerai recovery and/or higher purity.
The instant invention therefore relates to a collecter composition comprising
a) 50 - 99 wt.-% of a mixture of fatty acids and
b) 1-50 wt.-% of an N-acyl dérivative of sarcosine of the formula (I)
O
A m
RNCOOH k’
I
CH3 wherein
R is a saturated or unsaturated hydrocarbon chain with 7 to 21 carbon atoms, wherein the mixture of fatty acids comprises 10.0 - 35.0 wt.-% of fatty acid having a saturated Cu hydrocarbon group, 2.5 -15.0 wt.-% of fatty acid having a saturated Ci3 hydrocarbon group, 10.0 - 25.0 wt.-% fatty acid having a monounsaturated C17 hydrocarbon group and 20.0 - 45.0 wt.-% fatty acid having a bisunsaturated C17 hydrocarbon group.
The Inventive collecter composition may comprise other fatty acids to balance to 100 wt.-%. The weight percentages referto the total fatty acid contentofthe inventive collecter composition as being 100 wt.-%.
ln a preferred embodiment the mixture of fatty acids comprises fatty acids having
1.0- 6.5 wt.-% of saturated C7
1.0 - 4.0 wt.-% of saturated C9
10.0 - 35.0 wt.-% of saturated Cu
2.5 -15.0 wt.-% of saturated C13
1.0- 7.0 wt.-% of saturated C15
0.0 - 1.0 wt.-% of monounsaturated C15
0.0 - 1.0 wt.-% of bisunsaturated C15
0.5 - 2.0 wt.-% of saturated C17
10.0 - 25.0 wt.-% of monounsaturated C17
20.0 - 45.0 wt.-% bisunsaturated C17
0.0- 2.0 wt.-% trisunsaturated C17
0.0 - 1.0 wt.-% saturated C19
0.0 - 4.0 wt.-% monounsaturated Cig hydrocarbon chalns, and
0.0 - 7.0 wt.-% other fatty acids
The expression saturated hydrocarbon chain means preferably alkyl groups. The expression monosaturated hydrocarbon chain means preferably alkenyl groups.
The expression bisunsaturated hydrocarbon chains means alkenyl groups having two double bonds.
Fatty acids are defined in the sense of this invention as mixtures of carboxylic acids bearing a long linear hydrocarbon chain, which can be saturated or unsaturated or multiply unsaturated. Especially effective for the scope ofthis invention is the use of fatty acids from vegetable oils and tall oil fatty acids. The preferred fatty acids in the sense ofthis invention are coconutoil fatty acid and tall oil fatty acid. Prédominant carboxylic acids in the coconut oil fatty acid are lauric acid (saturated Cu hydrocarbon chain) with a content between 44 and 54 wt.-% and myristic acid (saturated Cu hydrocarbon chain) with a content between 13 and 20 wt.-%. The preferred quality of tall oil fatty acid has an acid value higher than 190 mg KOH/g and a content of rosin acids and unsaponifiables lower than
2.1 wt.-% and 2.0 wt.-%, respectively. Prédominant carboxylic acids in the tall oil fatty acid are oieic acid (monounsaturated Cn hydrocarbon chain) with a content between 25 and 50 wt.-% and linoleic acid (bisunsaturated Cn hydrocarbon chain) with a content between 35 and 60 wt.-%.
The characterization of the alkyl chain distribution In fatty acids can be done via gas chromatography after conversion ofthe carboxylic acids in the volatile methyl ester dérivatives according to the AOCS Method Ce 1 - 62, Fatty Acid Composition by Gas Chromatography” AOCS Official Methods (2005) American Oil Chemists Society.
The mixtures of fatty acids which are especially effective in the collecter compositions according to the présent invention contain between 0.3 and
1.7 weight parts of fatty acids from vegetable oils to 1 weight part of tall oil fatty acid. The most preferred ratio for the mixture of fatty acids according to this
Invention is 1 weight part of coconut oil fatty acid to 1 weight part of tall oil fatty acid.
Especially preferred are N-acyl dérivatives of sarcosine where R Is a saturated or unsaturated hydrocarbon chain with 11 to 19 carbon atoms. The most preferred N-acyl dérivative of sarcosine Is N-oleoylsarcoslne.
Especially preferred collecter compositions according to the présent Invention contain 65 - 99 wt.-% of a mixture of fatty acids (component a) and 1-35 wt.-% of an N-acyl dérivative of sarcosine (component b). Most preferred collecter compositions contain 80 wt.-% of a1:1 weight mixture of coconut oil fatty acid and tall oil fatty acid and 20 wt.-% of N-oleoylsarcosine.
The composition of the invention Is for use as collecter in direct froth flotation processes of nonsulfide ores. It was found that the composition of the Invention is especially suitable for the direct froth flotation of nonsulfide ores containing aikaiine earth metals, as apatite, calcite, scheelite, fluorspar, magnesite and barite. Most surprisingly it was found that the composition of the invention Is also especially suitable for the direct froth flotation of ilmenite, a titanium-iron oxide minerai of formula FeTiCh which Is the most Important source for titanium.
Furthermore, the présent Invention also relates to a process for beneficiation of nonsulfide minerais, the process comprising the steps of bringlng the collecter composition according to the présent invention In contact with an aqueous suspension of the nonsulfide minerai and frothlng the so formed minerai pulp. The collecter composition according to the présent Invention Is preferably used in amounts between 100 and 1000 g/t of solid ore for the direct froth flotation of nonsulfide ore. It Is also possible to add other flotation reagents to the minerai pulp, if these are required. Examples of these reagents are frothers as for example plne oil, polyglycols, polyoxyparaffins or alcohols, depressants as for example starch, carboxymethylcellulose or sodium silicate and pH-regulators as for example sodium hydroxide or sodium carbonate.
Examples
1. General procedure for préparation of collecter compositions according to this invention:
Distilled coconut fatty acid sample was warmed to 35 °C until it was entirely melted and then added to tall oil fatty acid at room température. The fatty acid mixture was then homogenlsed by a slow stirring action. Fïnally, N-oleoylsarcosine was slowly added to the fatty acid mixture. The mixture was thereafter homogenlsed for a further 10 minutes. The procedure is completed when a clear, yellow-coloured liquid solution is obtained.
2. Collecter compositions according to this invention prepared following used the procedure describer under 1.
Composition 1:
Component a:
wt.-% of a mixture of 1 weight part of distilled coconut fatty acid and weight part of tall oil fatty acid with a hydrocarbon chain distribution as follows:
3.25 wt.-% of saturated C7 hydrocarbon chain
2.85 wt.-% of saturated Cg
25.65 wt.-% of saturated Cn
8.60 wt.-% of saturated C13
4.45 wt.-% of saturated C15
0.02 wt.-% of monounsaturated C15
0.20 wt.-% of bisunsaturated C15
1.25 wt.-% of saturated C17
19.10 wt.-% of monounsaturated C17
28.5 wt.-% bisunsaturated C^
0.60 wt.-% trisunsaturated C17
0.05 wt.-% saturated C19
1.25 wt.-% monounsaturated Cjg
4.3 wt.-%others
Component b:
wt.-% N-oleoylsarcosine
Composition 2:
Component a:
wt.-% of a mixture of 0.33 weight part of distilled coconut fatty acid and weight part of ta!! oil fatty acid with a hydrocarbon chain distribution as follows:
1.62 wt.-% of saturated C7 hydrocarbon chain
1.42 wt.-% of saturated Cg
12.82 wt.-% of saturated Cu
4.30 wt.»% of saturated C13
2.37 wt.-% of saturated C15
0.04 wt.-% of monounsaturated C15
0.30 wt.-% of bisunsaturated C15
1.17 wt.-% of saturated Cn
24.70 wt.-% of monounsaturated Cv
42.15 wt.-% bisunsaturated C17
0.90 wt.-% trisunsaturated C17
0.02 wt.-% saturated C19
1.87 wt.-% monounsaturated Cig
6.40 wt.-% others
Component b:
wt.-% N-o!eoylsarcosine
Composition 3:
Component a:
wt.-% of a mixture of 1.66 weight part of distilled coconut fatty acid and weight part of tail oil fatty acid with a hydrocarbon chain distribution as follows:
4.10 wt.-% of saturated C7 hydrocarbon chain
3.59 wt.-% of saturated Cg
32.32 wt.-% of saturated Cn
10.84 wt.-% of saturated Cn
5.53 wt.-% of saturated Cn
0.02 wt.-% of monounsaturated Cn
0.15 wt.-% of bisunsaturated Cn
1.29 wt.-% of saturated Ci7
16.19 wt.-% of monounsaturated C17
21.40 wt.-% bisunsaturated Ci7
0.44 wt.-% trisunsaturated Ci7
0.06 wt.-% saturated Cig
0.92 wt.-% monounsaturated Cig
3.21 wt.-% others
Component b:
wt.-% N-oieoylsarcosine
Composition 4:
Component a:
wt.-% of a mixture of 1 weight part of distilled coconut fatty acid and weight part of tali oil fatty acid with a hydrocarbon chain distribution as follows:
3.25 wt.-% of saturated C7 hydrocarbon chain
2.85 wt.-% of saturated Cg
25.65 wt.-% of saturated Cn
8.60 wt.-% of saturated Cn
4.45 wt.-% of saturated Cn
0.02 wt.-% of monounsaturated Cn
0.20 wt.-% of bisunsaturated Cn
1.25 wt.-% of saturated Ci7
19.10 wt.-% of monounsaturated Ci7
28.5 wt.-% bisunsaturated Ci7
0.60 wt.-% trisunsaturated C17
0.05 wt.-% saturated Cig
1.25 wt.-% monounsaturated Cn
4.3 wt.-% others
Component b:
wt.-% N-oleoylsarcosine
Composition 5:
Component a:
wt.-% of a mixture of 1 weight part of distilled coconut fatty acid and weight part of tall oil fatty acid with a hydrocarbon chain distribution as follows:
3.25 wt.-% of saturated C7 hydrocarbon chain
2.85 wt.-% of saturated Cg
25.65 wt.-% of saturated Cn
8.60 wt.-% of saturated C«
4.45 wt.-% of saturated C15
0.02 wt.-% of monounsaturated C15
0.20 wt.-% of bisunsaturated C15
1.25 wt.-% of saturated Ci7
19.10 wt.-% of monounsaturated C17
28.5 wt.-% bisunsaturated Ci7
0.60 wt.-% trisunsaturated C17
0.05 wt.-% saturated
1.25 wt.-% monounsaturated Cig
4.3 wt.-% others
Component b:
wt.-% N-oleoylsarcosine
Composition 6:
Component a:
wt.-% of a mixture of 1 weight part of distilled coconut fatty acid and weight part of tall oil fatty acid with a hydrocarbon chain distribution as follows:
3.25 wt.-% of saturated C7 hydrocarbon chain
2.85 wt.-% of saturated Cg
25.65 wt.-% of saturated Cn
8.60 wt.-% of saturated Ci3
4.45 wt.-% of saturated C15
0.02 wt.-% of monounsaturated C15
0.20 wt.-% of bisunsaturated C15
1.25 wt.-% of saturated Cn
19.10 wt.-% of monounsaturated Ci7
28.5 wt.-% bisunsaturated C17
0.60 wt.-% trisunsaturated Ci7
0.05 wt.-% saturated C19
1.25 wt.-% monounsaturated C19
4.3 wt.-% others
Component b:
wt.-% N-oleoylsarcosine
3. Comparative collecter compositions
Composition 7:
wt.-% of tall oil fatty acid with a hydrocarbon chain distribution as follows:
wt.-% of saturated C7 hydrocarbon chain wt.-% of saturatedCg wt.-% of saturatedCh wt.-% of saturatedC13
0.30 wt.-% of saturatedC15
0.05 wt.-% of monounsaturated C15
0.40 wt.-% of bisunsaturated C15
1.10 wt.-% of saturated Cn
30.30 wt.-% of monounsaturated Ci7
55.80 wt.-% bisunsaturated Cn
1.20 wt.-% trisunsaturated Ci7 wt.-% saturated C19
2.50 wt.-% monounsaturated C19
8.50 wt.-% others and wt.-% N-oleoylsarcosine
Composition 8:
wt.-% of distilled coconut fatty acid with a hydrocarbon chain distribution as follows:
6.50 wt.-% of saturated C7 hydrocarbon chain
5.70 wt.-% of saturated Cg
51.30 wt.-% of saturated Cn
17.20 wt.-% of saturated C13
8.60 wt.-% of saturated C15 wt.-% of monounsaturated C15 wt.-% of blsunsaturated C15
1.40 wt.-% of saturated C17
7,90 wt.-% of monounsaturated C17
1.20 wt.-% bisunsaturated C17 wt.-% trisunsaturated C17
0.10 wt.-% saturated C19 wt.-% monounsaturated C19
0.10 wt.-% others and wt.-% N-oleoylsarcosine
Composition 9:
100 wt.-% of tall oil fatty acid with a hydrocarbon chain distribution as follows:
wt.-% of saturated C7 hydrocarbon chain wt.-% of saturatedCg wt.-% of saturatedCn wt.-% of saturatedCi 3
0.30 wt.-% of saturatedC15
0.05 wt.-% of monounsaturated C15
0.40 wt.-% of bisunsaturated C15
1.10 wt.-% of saturated C17
30.30 wt.-% of monounsaturated Ci7
55.80 wt.-% bisunsaturated Ci7
1.20 wt.-% trisunsaturated Cn wt.-% saturated Cig
2.50 wt.-% monounsaturated C19
8.50 wt.-% others
Composition 10:
100 wt.-% of a mixture of 1 weight part of distilled coconut fatty acid and weight part of tall oil fatty acid with a hydrocarbon chain distribution as follows:
3.25 wt.-% of saturated C7 hydrocarbon chain
2.85 wt.-% of saturated Cg
25.65 wt.-% of saturated Cn
8.60 wt.-% of saturated Ci3
4.45 wt.-% of saturated Cts
0.02 wt.-% of monounsaturated C15
0.20 wt.-% of bisunsaturated Ci5
1.25 wt.-% of saturated Ct7
19.10 wt.-% of monounsaturated C17
28.5 wt.-% bisunsaturated Ci7
0.60 wt.-% trisunsaturated Ci7
0.05 wt.-% saturated Cig
1.25 wt.-% monounsaturated Cig
4.3 wt.-% others
4. Flotation test results
Example I: Apatite ore containing 16.1 % P2O5,47.9 % SÎO2.21.4 % CaO.and 0.7 % MgO.
A 390 g portion of the ore sample was ground In a laboratory stainless steel mill for 5 minutes at 50 rpm and 66 % solids. This resulted In the following particle size distribution for the dotation feed: Pso “ 17 Mm and Pso = 47 pm. On completion of the grinding stage, the milled slurry was transferred to a 2.5 L capacity dotation cell, where the percentage solid was adjusted to approximately 15 % by addition of the appropriate amount of water. The dotation device was a Denver D-12 dotation machine and the impeller speed set to 1100 rpm. The dotation pulp was thereafter conditioned for 4 minutes and 3 minutes with the depressants sodium silicate (Na2SiO3, 550 g/t) and sodium carbonate (Na2CO3, 280 g/t) respectively - in the indicated order. Next the collecter mixture, which was freshly prepared as a 1 % solution prior te starting each dotation test, was added and conditioned with the dotation pulp for 3 min. Finally, the air dow rate was set to 2 L/min and the resulting froth collected for 12 minutes.
| Collecter composition | Coconut oil fatty acid (wt.-%) | Tall oil fatty acid (wt.-%) | N-Oleoyl sarcosine (wt.-%) | Dosage (gfton) | Grade P2OS (wt.-%) | Recovery P2Og (wt.-%) |
| 1 | 40 | 40 | 20 | 500 | 27.86 | 55.74 |
| 2 | 20 | 60 | 20 | 500 | 25.47 | 69.57 |
| 3 | 50 | 30 | 20 | 500 | 27.77 | 58.35 |
| 7(C) | • | 80 | 20 | 500 | 26.56 | 54.37 |
| 8(C) | 80 | - | 20 | 500 | 30.82 | 42.91 |
The results from the dotation tests show that the collecter compositions according to this invention (1 to 3) show excellent dotation efficiency and in particular, notably improved minerai recovery in comparison with the reference compositions 7 and 8.
The P2Os grade obtained with the inventive compositions îs slightly lower than what was obtained especially with the reference 8 In the laboratory experiments. This différence in grade Is considered negligible because industrial dotation plants typically put the rougher concentrate through two, three or even four cleaning steps. In this way, the grade of the dnal concentrate is typically increased.
Example II: llmenite ore containing on approximately 32 % TiO2 Approximately 1.2 L of sample was collected from the flotation feed stream of an ilmenite flotation plant. The 1.2 L sample, which consisted of approximately 1785 g dry ore and 750 g water, was thereafter transferred to a 3.2 L capacity flotation cell. The collecter was thereafter added as-is and conditioned for 10 minutes using a Denver D-12 flotation device with the impeller speed set at 1550 rpm. The percentage solids In the slurry was thereafter reduced from 71 % to 51 % by addition of 1.0 L of Industrial water. Hereafter, the airflow rate was set to 8.5 L/min and resulting froth collected for 270 seconds. In the case of the ore in question, a fatty acid and paraffin was used as collecter combination. The results are shown below.
| Collecter composition | Coconut oil fatty acid (wt.-%) | Tall oil fatty acid (wt.-%) | N-Oleoyl sarcosine (wt.-%) | Collecter dosage (g/ton) | Paraffin dosage (g/ton) | Grade TiO2 (wt.-%) | Recovery TiO2 (wt.-%) |
| 1 | 40 | 40 | 20 | 840 | 360 | 37.4 | 81.1 |
| 9(C) | - | 100 | - | 840 | 360 | 36.8 | 76.0 |
The flotation results show that a 1:1 replacement of the fatty acid collecter resulted in a 5.1 % increase in recovery in combination with a marginal increase in concentrate grade.
Example III: scheelite ore containing 0.20 % WO3
The ground ore was conditioned with the depressants tannin (25 g/t), sodium silicate (350 g/t) and sodium carbonate (1000 g/t) after which the slurry pH was adjusted to pH 10 by adding the required amount of NaOH solution. The collecter was then added as-is and conditioned with the flotation slurry for 2 minutes followed by addition of Clariant frother Flotanol 7026 and conditioning for a further minute. Hereafter sufficient water was added to decrease the percentage solids In the dotation cell from 60% during the conditioning step to 35% In the flotation step. The airflowrate was now set to 5 L/mln and the resulting froth coliected for minutes.
| Collecter composition | Coconut oil fatty acid (wt.-%) | Tall oil fatty acid (wt.-%) | N-Oleoyl sarcosine (wt.-%) | Dosage (g/ton) | Grade W2O3 (wt.-%) | Recovery W2O3 (wt.-%) |
| 4 | 33.5 | 33.5 | 33 | 145 | 1.16 | 78.3 |
| 5 | 37.5 | 37.5 | 25 | 194 | 0.81 | 84.2 |
| 6 | 42 | 42 | 16 | 151 | 1.61 | 78.0 |
| 10 (C) | 50 | 50 | - | 195 | 1.42 | 72.7 |
| 9 (C) | - | 100 | - | 184 | 0.87 | 71.3 |
| 9 (C) | - | 100 | - | 369 | 0.72 | 78.2 |
The use ofthe new collecter mixture resulted in a significant increase in WO3 grade as compared to the comparative product (100 % tall oil fatty acid collecter). In addition, a similarWO3 recovery valuewas obtainedwith 151 g/tdosage ofthe 10 new collecter blend as compared with 369 g/t dosage of the comparative tall oil fatty acid collecter.
Claims (11)
1. A collecter composition for the direct froth flotation of nonsulfide ores comprising
a) 50 - 99 wt.-% of a mixture of fatty acids and
b) 1-50 wt.-% of an N-acyl dérivative of sarcosine of the formula (I)
COOH (D ch3 wherein
R is a saturated or unsaturated hydrocarbon chain with 7 to 21 carbon atoms, wherein the mixture of comprises 10.0 - 35.0 wt.-% of fatty add having a saturated Cu hydrocarbon group, 2.5 -15.0 wt.-% of fatty acid having a saturated Cu hydrocarbon group, 10.0 - 25.0 wt.-% fatty acid having a monounsaturated C17 hydrocarbon group and 20.0 - 45.0 wt.-% fatty acid having a bisunsaturated C17 hydrocarbon group.
2. Composition according to claim 1, wherein the fatty acid mixture comprises fatty acids having
1.0- 6.5 wt.-% of saturated C7 hydrocarbon chain
1.0- 4.0 wt.-% of saturated C9
10.0 - 35.0 wt.-% of saturated Cu
2.5 -15.0 wt.-% of saturated C13
1.0- 7.0 wt.-% of saturated C15
0.0 - 1.0 wt.-% of monounsaturated C15
0.0 - 1.0 wt.-% of bisunsaturated C15
0.5 - 2.0 wt.-% of saturated C17
10,0 - 25.0 wt.-% of monounsaturated Ci 7
20.0 - 45.0 wt,-% bisunsaturated Ci 7
0.0 - 2.0 wt.-% trisunsaturated C17
0.0 - 1.0 wt.-% saturated Cw
0.0 - 4.0 wt.-% monounsaturated Cw
0.0 - 7.0 wt.-% other fatty acids.
3. The composition of claim 1 and/or 2, wherein the component a) is a mixture of 0.3 to 1.7 weight parts of coconut oil fatty acid to 1 weight part of tall oil fatty acid.
4. The composition of one or more of claims 1 to 3, wherein the component b) is N-oleoylsarcosine.
5. The composition as claimed in one or more of claims 1 to 4, wherein the component a) is 80 wt.-% of a mixture of 1 weight part of coconut oil fatty acid and 1 weight part of tall oil fatty acid and component b) is 20 wt.-% of N-oleoylsarcoslne.
6. A process for the direct froth flotation of nonsulfide minerais, the process comprising the steps of bringing the collector composition according to one or more of claims 1 to 5 in contact with an aqueous suspension of the nonsulfide minerai and frothing the so formed minerai pulp.
7. The process as claimed ln claim 6, wherein the nonsulfide minerais is apatite.
8. The process as claimed in claim 6, wherein the nonsulfide minerais are selected from the group of calcite, scheelite, fluorspar, magnesite and barite,
9. The process as claimed ln ciaim 6, wherein the nonsulfide minerai Is llmenite.
10. A direct froth flotation process according to claims 6 to 9, wherein the amount of collector composition added Is an amount between 100 g and 1000 g per ton of ore.
11. Use of a composition according to one or more of claims 1 to 5 as collecter for the direct flotation of non-sulfide ores in an amount between 100 and 1000 g per ton of ore.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15000927.2 | 2015-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA18442A true OA18442A (en) | 2018-11-15 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2016239582B2 (en) | Composition of fatty acids and N-acyl derivatives of sarcosine for the improved flotation of nonsulfide minerals | |
| US3779380A (en) | Collector composition for ore flotation | |
| WO2007122148A1 (en) | Reverse froth flotation of calcite ore | |
| US8925729B2 (en) | Method for the beneficiation of coal | |
| EP3169439A1 (en) | Stable aqueous composition of neutral collectors and their use in mineral beneficiation processes | |
| US4330398A (en) | Flotation of phosphate ores with anionic agents | |
| CN110612161B (en) | Improved composition and process for reverse froth flotation of phosphate ores | |
| EP3481557A2 (en) | Process to treat magnetite ore and collector composition | |
| OA18442A (en) | Composition of fatty acids and N- acyl derivatives of sarcosine for the improved flotation of nonsulfide minerals | |
| WO2020043829A1 (en) | Beneficiation of phosphate from phosphate containing ores | |
| US4732666A (en) | Froth flotation | |
| WO2020083793A1 (en) | Collector composition and flotation process for beneficiation of phosphate | |
| WO2016161032A1 (en) | Collectors containing oligomeric acids and rosin oils and methods for making and using same | |
| EP3817862A1 (en) | Collector composition containing biodegradable compound and process for treating siliceous ores | |
| US11638923B1 (en) | Flotation reagents from acidic olive oil | |
| WO2023180027A1 (en) | Novel cationic collectors for improving a process for froth flotation of silicates | |
| US20230302464A1 (en) | Novel Cationic Collectors for Improving a Process for Froth Flotation of Silicates | |
| CA2092440A1 (en) | Process for the recovery of minerals from non-sulfidic ores by flotation | |
| WO2016065187A1 (en) | Methods and collectors for purifying phosphorous containing materials | |
| GB515601A (en) | Improvements in or relating to the separation of minerals | |
| WO2019089927A1 (en) | Reagent scheme for sedimentary phosphate flotation | |
| GB2110958A (en) | Froth floatation of coal |