GB2136015A - Collector for flotation of coal and other carbonaceous material - Google Patents
Collector for flotation of coal and other carbonaceous material Download PDFInfo
- Publication number
- GB2136015A GB2136015A GB08406426A GB8406426A GB2136015A GB 2136015 A GB2136015 A GB 2136015A GB 08406426 A GB08406426 A GB 08406426A GB 8406426 A GB8406426 A GB 8406426A GB 2136015 A GB2136015 A GB 2136015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coal
- collector
- flotation
- carbonaceous material
- molecular mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000005188 flotation Methods 0.000 title claims abstract description 11
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 9
- 150000008282 halocarbons Chemical class 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- 239000000460 chlorine Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 description 10
- 238000011084 recovery Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000012141 concentrate Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 4
- PBKONEOXTCPAFI-UHFFFAOYSA-N 1,2,4-trichlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1 PBKONEOXTCPAFI-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- CZNHKZKWKJNOTE-UHFFFAOYSA-N 1,2-dibromocyclohexane Chemical compound BrC1CCCCC1Br CZNHKZKWKJNOTE-UHFFFAOYSA-N 0.000 description 1
- XKEFYDZQGKAQCN-UHFFFAOYSA-N 1,3,5-trichlorobenzene Chemical compound ClC1=CC(Cl)=CC(Cl)=C1 XKEFYDZQGKAQCN-UHFFFAOYSA-N 0.000 description 1
- QMCDRTVVMXJKHS-UHFFFAOYSA-N 1,8-dibromodecane Chemical compound CCC(Br)CCCCCCCBr QMCDRTVVMXJKHS-UHFFFAOYSA-N 0.000 description 1
- MYMSJFSOOQERIO-UHFFFAOYSA-N 1-bromodecane Chemical compound CCCCCCCCCCBr MYMSJFSOOQERIO-UHFFFAOYSA-N 0.000 description 1
- ZTEHOZMYMCEYRM-UHFFFAOYSA-N 1-chlorodecane Chemical compound CCCCCCCCCCCl ZTEHOZMYMCEYRM-UHFFFAOYSA-N 0.000 description 1
- AWLDSXJCQWTJPC-UHFFFAOYSA-N 1-fluoro-2,3-dimethylbenzene Chemical compound CC1=CC=CC(F)=C1C AWLDSXJCQWTJPC-UHFFFAOYSA-N 0.000 description 1
- ANOOTOPTCJRUPK-UHFFFAOYSA-N 1-iodohexane Chemical compound CCCCCCI ANOOTOPTCJRUPK-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- -1 Aryl o-iodotoluene Chemical compound 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 102200076863 c.119C>T Human genes 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012320 chlorinating reagent Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009291 froth flotation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 102200029979 rs201824781 Human genes 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/006—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/0043—Organic compounds modified so as to contain a polyether group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/025—Precious metal ores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/08—Coal ores, fly ash or soot
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention concerns a collector for the flotation of coal or carbonaceous materials comprising a halogenated hydrocarbon or a mixture of halogenated hydrocarbons the molecular mass or mean molecular mass (in the case of a mixture) being in excess of 150 so that at least some of the halogenated hydrocarbon does not evaporate under flotation conditions.
Description
SPECIFICATION
Collector for flotation of coal and other carbonaceous material
This invention relates to a collectorforflotation of coal and other carbonaceous material.
Generally, the reagents useful in beneficiation of coal by froth flotation comprise a frother, for example pine oil or 4-methyl 2-pentanol, and a hydrophobic oil as collector or conditioner, for example paraffin, kerosineorcreosote. Certain commercial products contain components providing both ofthesefunc- tions, for example crude cresylic acid or waste liquors from coke production.
Those materials known to be usefulas coal collectors comprise compounds of carbon and hydrogen, that is aliphatic and aromatic hydrocarbons generally containing 8 or more carbon atoms, and compounds of carbon, hydrogen and oxygen,such as alkylphenols and related products derived from pyrolysis of coal. The addition of detergents, for example esters of sulphosuccinic acid to hydrocarbon collectors is known, but the purposeofthis isto improve the dispersion of the hydro-carbon in the coal suspension ratherthan contribute directlyto the collector properties ofthe hydrocarbon.
A process related to coal flotation is the recovery by flotation ofcarbonaceous material, in particular activated carbon, from an ore suspension or pulp in which the carbonaceous material contains a valuable metal such as gold or silver.
According to the present invention, a collectorfor coal or other carbonaceous material, comprises a halogenated hydrocarbon in a dispersible form and of sufficient molecular mass to preclude substantial loss by evaporation during the collecting step.
In the preferred form of the invention the halogenated hydrocarbon or hydrocarbons chosen are in the liquid state. However, those which exist as solids or viscous liquids may be applied as solutions in suitable solvents. Such solvents should be inert or may themselves have frothing for coal or other carbonaceous material collecting properties.
In one form ofthe invention an admixture of one or more halogenated hydrocarbons with liquid hydrocarbons is provided, and, in particular,those liquid hydrocarbons which are known to be useful in coal flotation.
In general the molecular mass ofthe halogenated hydrocarbons should exceed about 150, preferably lies in the range 170 to 105, and more particularly 200 to 2000.
The halogenated hydrocarbons are conveniently the chlorinated hydrocarbons, that is compounds of carbon, hydrogen and chlorine conveniently prepared by reaction of a chlorinating agent with aliphatic, cycloaliphatic or aromatic hydrocarbons.
The chlorine contentofthe product by mass may range from the higher of 5% or one chlorine atom per molecule to 85%, is preferably 10% to 75%, and more particularly 15% to 60%.
The invention is illustrated bythefollowing examples, in which the amounts of reagents used are stated on grams pertonneofdrycoal (g/t).
Example 1
A chlorinated paraffin manufactured by Klipfontein Organic Products Limited containing 48% m/m chlorine and of molecular mass about 370 (sold as P48LM
PLASTICLOR) was mixed with 1/5 of its mass of acetone to form the collector mixture. Coal fines essentiallysmallerthan 0,5 mm, and containing 33% m/m ash were obtained from a coal plant treating an
Eastern Transvaal coal. A pulp containing 10% by mass ofthesefines was made up in a Denver D-1 2 laboratory flotation machine, and treated with a 100 g/t proprietory frother and 350 g/t ofthe collector mixture. Coal was recovered by flotation for 2 minutes, and the mass recovery of dry coal determined to be 34,3%.
Example2
The same chlorinated paraffin used in Example 1 was mixed with twice its mass of commercial power paraffin, and the same test procedure used. Mass recovery of dry coal was 56,6%.
Example 3
Three different chlorinated paraffinswere each mixed with twice their mass of power paraffin as in
Example 2, and compared by the same test proce dupe, except that the proprietory frother TEB manufactured by NCP (Natal) Limited was used at 200 g/t.
The dried concentrates and tailings were analysed for ash, and the recovery of combustible matter (DAF coal) calculated.
lean Concentrate Recovery PLASTICLO 9 Chlorine Mean Ilasa Ash 9 s/n DAF Coal 9 P4BLM 49 560 13.6 76 P52L 51 390 12.6 73 P40L 41 540 13.1 72 Example 4
The chlorinated paraffin tested in Example 3 containing 49% chlorine was mixed with power paraffin to form two collector mixtures, in the mass properties 50 : 50 and 20 : 89 respectively.These and the power paraffin used were compared using the method of Example 3, but at levels of 310, 390 and 470 g/t respectively.
Level Concentrate Recovery Mixture g/t Ash 9 m/m OAF Coal 9 50:50 310 13.6 73 20:80 390 14.2 75 0:100 470 13.2 70 The effectiveness of the combination of chlorinated hydrocarbon and paraffin is shown.
Example 5
The 50 50 mixture of Example 4was used as collector, and a frother mixture made of TEB and the collector mixture in mass proportion of 4:1. These reagents were tested using the method of Example 3 at 390 g/t and 180 g/t respectively. A concentrate containing 13.5% ash and representing a recovery of
DAF coal of 75% was obtained. The effectiveness of the chlorinated hydrocarbon in combination with a frotheris shown.
Example 6 Asample oftailings from a plant treating a Western
Transvaal gold ore was made into a pulp containing 25% by mass ofthetailingsand 0.12% by mass of an activated charcoal. This was treated with 180 g/t of the proprietoryfrother Senfroth 9000 manufactured by
NCP (Natal) Ltd, and 150 git of the collector mixture of
Example 4. Concentrate was removed for 2 minutes.
The recovery of charcoal was calculated from combustion of the dry concentrate to be 69% by mass.
Additional examples were carried out with a variety of halogenated hydrocarbons. In all oftheexamplesa sample of coal finer was obtained from the North Western Transvaal. Thiswas made into a pulp containing 131/2% solids and su bjected to flotation using as collector 300 glt of each example, and as frothed 40 glut of Senfroth TEB. Dry ash-free coal in products was determined using ASTM Method D271.
The results of the examples are embodied in the following table:
Collector Mass Conc. Tail Recovery Grade Grade Recovery Halogen Type Compound z % DAT t-DAF DAF z Fluorine Alkyl Fluorohexadecane 22,7 87,2 59,5 30,1 Aryl 3-Fluoroxylène 16,1 81,3 62,5 20,3 Chlorine Alkyl 1-Chlorodecane 44,7 83,4 52,6 56,2 dichiorononane 28,1 84,8 56,8 36,8 Aryl za-dichiorobensene 13,0 81,8 62,7 16,2 1,2,4-trichloro- benzene 16,8 83,5 61,0 21,6 1,3,5-trichloro- benzene 41,0 81,6 53,8 51,3 Bromine Alkyl 1-bromodecane 21,2 85,9 60,1 27,7 1,8-dibromodecane 44,7 83,4 52,6 56,2 1,2-dibromocyclo- hexane 16,0 83,0 60,8 20,6 Aralkyl ss-broxDisopropyl- benzene 26,0 81,8 56,5 33,7 Iodine Alkyl 1-iodohexane 34,1 82,4 54,5 43,8 Aryl o-iodotoluene 18,3 82,9 62,5 22,9 paraffin 44,8 83,7 50,0 57,7
Claims (6)
1. Acollectorforcoal or other carbonaceous material comprising one or more halogenated hydrocarbons in a dispersible form and having a molecular mass or mean molecular mass exceeding 150.
2. Acollectorforcoal or other carbonaceous material comprising a mixture of one or more halogenated hydrocarbons having a molecular mass above 150, with a liquid hydrocarbon known to be useful in coal flotation.
3. Acollectoraccording to claim 1 in which the halogen is chlorine and is presenttothe extent of between 5 and 85 percent per molecule.
4. Amethodofflotation ofcoal orothercarbo- naceous material including the step of adding to the material required to be treated, an amount of a collector according to any of claims 1 to 3.
5. A collector substantially as described in any of the examples.
6. A method offlotation substantially as described in any of the examples.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA831685 | 1983-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8406426D0 GB8406426D0 (en) | 1984-04-18 |
| GB2136015A true GB2136015A (en) | 1984-09-12 |
Family
ID=25576586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08406426A Withdrawn GB2136015A (en) | 1983-03-11 | 1984-03-12 | Collector for flotation of coal and other carbonaceous material |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2554984A (en) |
| GB (1) | GB2136015A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338338A (en) * | 1992-09-22 | 1994-08-16 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US5364453A (en) * | 1992-09-22 | 1994-11-15 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US8136669B2 (en) | 2005-02-08 | 2012-03-20 | Filler Paul A | Process and composition for froth flotation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276382A (en) * | 1926-02-22 | 1927-08-22 | Illingworth Carbonization Co | Improvements in apparatus for washing and treating coal |
| US2150917A (en) * | 1936-08-31 | 1939-03-21 | Du Pont | Process of and apparatus for separating |
| US3348675A (en) * | 1963-12-30 | 1967-10-24 | Dow Chemical Co | Sink-float separation process |
| US4173530A (en) * | 1974-01-14 | 1979-11-06 | Otisca Industries, Ltd. | Methods of and apparatus for cleaning coal |
| GB2095284A (en) * | 1981-03-24 | 1982-09-29 | Otisca Ind Ltd | Coal recovery processes |
-
1984
- 1984-03-12 GB GB08406426A patent/GB2136015A/en not_active Withdrawn
- 1984-03-13 AU AU25549/84A patent/AU2554984A/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276382A (en) * | 1926-02-22 | 1927-08-22 | Illingworth Carbonization Co | Improvements in apparatus for washing and treating coal |
| US2150917A (en) * | 1936-08-31 | 1939-03-21 | Du Pont | Process of and apparatus for separating |
| US3348675A (en) * | 1963-12-30 | 1967-10-24 | Dow Chemical Co | Sink-float separation process |
| US4173530A (en) * | 1974-01-14 | 1979-11-06 | Otisca Industries, Ltd. | Methods of and apparatus for cleaning coal |
| GB2095284A (en) * | 1981-03-24 | 1982-09-29 | Otisca Ind Ltd | Coal recovery processes |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338338A (en) * | 1992-09-22 | 1994-08-16 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US5364453A (en) * | 1992-09-22 | 1994-11-15 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US5443621A (en) * | 1992-09-22 | 1995-08-22 | Giobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US5626647A (en) * | 1992-09-22 | 1997-05-06 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US5792235A (en) * | 1992-09-22 | 1998-08-11 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| US8136669B2 (en) | 2005-02-08 | 2012-03-20 | Filler Paul A | Process and composition for froth flotation |
| US20120132571A1 (en) * | 2005-02-08 | 2012-05-31 | Filler Paul A | Process and Composition for Froth Flotation |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2554984A (en) | 1984-09-20 |
| GB8406426D0 (en) | 1984-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |