WO2000065111B1 - Oxidative pressure leach recovery of precious metals using halide ions - Google Patents
Oxidative pressure leach recovery of precious metals using halide ionsInfo
- Publication number
- WO2000065111B1 WO2000065111B1 PCT/CA2000/000438 CA0000438W WO0065111B1 WO 2000065111 B1 WO2000065111 B1 WO 2000065111B1 CA 0000438 W CA0000438 W CA 0000438W WO 0065111 B1 WO0065111 B1 WO 0065111B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- precious metal
- host material
- recovering
- complex
- degrees celsius
- Prior art date
Links
- 239000010970 precious metal Substances 0.000 title claims abstract 66
- 230000001590 oxidative effect Effects 0.000 title claims abstract 24
- -1 halide ions Chemical class 0.000 title claims abstract 16
- 238000011084 recovery Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract 51
- 239000000463 material Substances 0.000 claims abstract 44
- 239000000470 constituent Substances 0.000 claims abstract 29
- 239000010953 base metal Substances 0.000 claims abstract 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract 14
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract 3
- 241001062472 Stokellia anisodon Species 0.000 claims abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 claims abstract 2
- 150000004820 halides Chemical class 0.000 claims 10
- 239000002184 metal Substances 0.000 claims 7
- 229910052751 metal Inorganic materials 0.000 claims 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 5
- 239000002253 acid Substances 0.000 claims 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims 4
- 150000004696 coordination complex Chemical class 0.000 claims 3
- 238000002386 leaching Methods 0.000 claims 3
- 239000001117 sulphuric acid Substances 0.000 claims 3
- 235000011149 sulphuric acid Nutrition 0.000 claims 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims 2
- 230000002378 acidificating effect Effects 0.000 claims 2
- 150000003841 chloride salts Chemical group 0.000 claims 2
- 150000001805 chlorine compounds Chemical group 0.000 claims 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims 2
- 238000000151 deposition Methods 0.000 claims 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims 2
- 230000003647 oxidation Effects 0.000 claims 2
- 238000007254 oxidation reaction Methods 0.000 claims 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims 1
- 239000001110 calcium chloride Substances 0.000 claims 1
- 229910001628 calcium chloride Inorganic materials 0.000 claims 1
- 229960002713 calcium chloride Drugs 0.000 claims 1
- 239000003054 catalyst Substances 0.000 claims 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims 1
- 229960003280 cupric chloride Drugs 0.000 claims 1
- 229940045803 cuprous chloride Drugs 0.000 claims 1
- 229940032296 ferric chloride Drugs 0.000 claims 1
- 229960002089 ferrous chloride Drugs 0.000 claims 1
- 229960000443 hydrochloric acid Drugs 0.000 claims 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims 1
- 229910001710 laterite Inorganic materials 0.000 claims 1
- 239000011504 laterite Substances 0.000 claims 1
- 229940073577 lithium chloride Drugs 0.000 claims 1
- 229910001629 magnesium chloride Inorganic materials 0.000 claims 1
- 229960002337 magnesium chloride Drugs 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 239000001103 potassium chloride Substances 0.000 claims 1
- 229960002816 potassium chloride Drugs 0.000 claims 1
- 235000011164 potassium chloride Nutrition 0.000 claims 1
- 239000011780 sodium chloride Substances 0.000 claims 1
- 229960002668 sodium chloride Drugs 0.000 claims 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/044—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A method for recovering a precious metal from a host material, comprises the steps of subjecting the host material to an oxidative pressure leach process, in the presence of a halide ion constituent, preferably a chloride ion, which is reactive with the precious metal, and at an elevated temperature of at least 170°C to cause at least a portion of the precious metal to be extracted by a leach solution in the form of a precious metal-bearing chloride complex, and recovering the precious metal from the leach solution. When the host material is a smelt malte material including a base metal and a precious metal, said malte is subjected to a first oxidative pressure leach process to recover substantially all of said base metal in the form of at least one sulphate complex into a first leach solution, and then said malte material is subjected to a second oxidative pressure leach process in the presence of a halide ion constituent and at a temperature sufficient to cause at least a portion of said precious metal to be recovered into a second leach solution, from which the precious metal is extracted.
Claims
AMENDED CLAIMS
[received by the International Bureau on 7 November 2000 (07.11.00); new claims 51 -72 added; remaining claims unchanged (8 pages)]
- recovering said precious metal from said leach solution.
45. A method as defined in claim 44 wherein the first oxidative pressure leach process occurs at a temperature ranging from 100 to 190 degrees Celsius.
46. A method as defined in claim 45 wherein the first oxidative pressure leach process occurs at a temperature ranging from 120 to 170 degrees Celsius.
47. A method as defined in claim 44 wherein the first oxidative pressure leach process occurs at a temperature ranging from 130 to 150 degrees Celsius.
48. A method for recovering a precious metal from a smelt matte material, wherein said matte material includes a precious metal constituent and a base metal constituent, comprising the steps of:
- subjecting said matte material to a single oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal constituent, and at a temperature sufficient to cause substantially all of said base and precious metal constituents to be recovered into a first leach solution; and
- recovering said precious metal from said leach solution.
49. A method as defined in claim 48 wherein the halide is chloride.
50. A method as defined in claim 5 wherein the host material includes a laterite.
51. A method for recovering a precious metal from a host material, comprising the steps
of:
- subjecting said host material to an oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal, and at a temperature ranging from about 210 to about 230 degrees Celsius, in an acidic leach solution with an acid strength of at least 1 g/L, to form a precious metal-bearing halide complex in the leach solution; and
- recovering said precious metal rom said complex.
52. A method as defined in claim 5 wherein said halide ion is selected from the group consisting of chloride, iodide or bromide.
53. A method as defined in claim 52wherein the halide salt is a chloride salt.
54. A method for recovering a precious metal from a host material, comprising the steps of:
- subjecting said host material to an oxidr-. ive pressure leach process, in the presence of a halide ion constituent in a sulfuric acid leach solution having a acid concentration greater than 1 g/L and which is reaΛive with said precious metal, and at a temperature ranging from about 170 degrees Celsius to about 300 degrees Celsius to cause at least a portion of said precious metal to be extracted by a leach solution to form a precious metal-bearing halide complex; and
- recovering said precious metal from said complex,
55. A method as defined in claim 54 wherein leach solution includes sulphuric acid.
56. A method for recovering a precious metal from a host material, comprising the steps of:
- placing said host material in a pressure leaching vessel;
- subjecting said host material to an oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal, and at a temperature ranging from 210 degrees Celsius to 230 degrees Celsius, to cause at least a portion of said precious metal to be extracted by a leach solution to form a precious metal-containing halide complex in the leach solution while in the pressure leaching vessel; and
- recovering said precious metal from said complex.
57. A method for recovering a precious metal from a host material having a precious metal constituent and a base metal constituent, comprising the steps of:
. subjecting said host material to a first oxidative pressure leach process, with sufficient oxidant and at a selected temperature to recover substantially all of said base metal constituent in the form of at least one sulphate complex into a first leach solution and then
- subjecting said host material to a second oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious mfital, and at a temperature ranging from 210 degrees Celsius to 230 degrees Celsius, sufficient to cause at least a portion of said precious metal to be recovered in a precious metal- bearing halide complex into a second leach solution; and then
- recovering said precious metal from said complex.
58. A method as defined in claim 57 wherein the first oxidative pressure leach process occurs at a temperature ranging from 100 to 1 0 degrees Celsius.
59. A method as defined in claim 57 wherein the first oxidative pressure leach process occurs at a temperature ranging from 120 to 170 degrees Celsius.
60. A method as defined in claim 57 wherein the first oxidative pressure leach process occurs at a temperature ranging from 130 to 150 degrees Celsius. 1. A method for recovering a precious metal from a host material, wherein said host material includes a precious metal constituent and a base metal constituent, comprising the steps of:
- subjecting said host material to a single oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal constituent, and at a temperature ranging from about 210 degrees Celsius to 230 degrees Celsius to cause substantially all of said base and precious metal constituents to be recovered into a first leach solution; and
- recovering said precious metal from s?id leach solution.
62. A method as defined in claim 61 where the halide ion constituent is a chloride.
63. A method for recovering a precious metal and a base metal from a common host material, comprising the steps of:
- subjecting the host material to a single oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal constituent in a leach solution having at least 1 g/L acid, and at a temperature from about 210 to about 230 degrees Celsius to cause at least a portion of said base metal to be recovered into a leach solution together with a precious metal-bearing halide complex; and
- recovering said base metal from said leach solution and said precious metal from said comple
64. A method for recovering a precious metal portion and a base metal portion from a host material, comprising the steps of:
- subjecting said host material to an oxidative pressure leach process, in the presence of a chloride ion constituent at a temperature of at least 200 degrees Celsius in order to form a leach solution containing at least one precious metal-bearing chloride complex and a base metal complex; and
- recovering said precious metal from said chloride complex.
65. A method for recovering a precious metal portion and a base metal portion from a host material, comprising the steps of
* subjecting said host material to an oxidative pressure leach process, in the presence of a chloride ion constituent at a temperature of at least 200 degrees Celsius in order to form a leach solution containing at least one precious metal-bearing chloride complex and a base metal complex in a single step; and
- recovering said precious metal from said chloride complex.
66. A method for recovering a precious metal portion and a base metal portion from a host material, comprising the steps of:
- leaching said host material under oxidative pressure conditions and in the presence of a chloride salt selected from the group consisting of sodium chloride, calcium chloride, potassium chloride, ferrous chloride, ferric chloride, hydrochloric acid, cupric chloride, cuprous chloride, lithium chloride and magnesium chloride, at a temperature ranging from about 210 degrees Celsius to about 230 degrees Celsius in order to form a leach solution containing at least one precious metal-bearing chloride complex and a base metal complex; and
- recovering said precious metal from said chloride complex.
67. A method for recovering a precious metal from a host material, comprising the steps of:
- depositing said host material in an autoclave,
- exposing the host material to leach solution containing a halide ion constituent which is reactive with said precious metal, at a Temperature ranging from about 210 degrees Celsius to about 230 degrees Celsius, and under pressure conditions sufficient to cause at least a portion of said precious metal to be extracted by a leach solution, thereby to form a precious metal-bearing halide complex dissolved in the leach solution while in said autoclave; and thereafter
- recovering said precious metal from said complex.
68. A method for recovering a precious metal from a host material, comprising the steps of:
- subjecting said host material to an oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said precious metal, and at a temperature ranging from about 210 degrees Celsius to about 230 degrees Celsius to cause oxidation of sulfide and elemental sulfur present in the host materials tα at least one sulfate group and at least a portion of said precious metal to be extracted by a leach solution to form a precious metal-bearing halide complex in the leach solution; and
- recovering said precious metal from said complex.
69. A method as defined in claim 1 wherein said host material is an oxidation catalyst.
70. A method for recovering a platinum group metal from a host material, comprising the steps of:
- subjecting said host material to an oxidative pressure leach process, in the presence of a halide ion constituent which is reactive with said metal, and at a temperature ranging from about 210 to about 230 degrees Celsius, in an acidic leach solution with an acid strength of at least 1 g/L, to form a platinum group metal-bearing halide complex in the leach solution; and
- recovering said metal from said complex.
71. A method for recovering a platinum group metal from a host material, comprising the steps of:
• subjecting said host material to an oxidative pressure leach process, in the presence of a chloride ion constituent which is reactive with said metal, and at a temperature ranging from about 210 to about 230 degrees Celsius, in a sulphuric acid leach solution with an acid strength of at least 1 g/L, to form a platinum group metal- bearing halide complex in the leach solution; and
- recovering said metal from said complex.
A method for recovering a precious metal from a host material, comprising the steps of:
- depositing said host material in an autoclave,
• exposing the host material to a sulphuric acid leach solution containing a chloride ion constituent which is reactive with said precious metaL at a temperature ranging from about 210 degrees Celsius to about 230 degrees Celsius, and under pressure conditions sufficient to cause at least a portion of said precious metal to be extracted by the leach solution, thereby tυ form a precious metal-bearing chloride complex dissolved in the leach solution while in said autoclave; and thereafter
- recovering said precious metal from jaid complex.
-40-
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU45295/00A AU763167B2 (en) | 1999-04-28 | 2000-04-27 | Oxidative pressure leach recovery of precious metals using halide ions |
| EP20000926596 EP1185717A1 (en) | 1999-04-28 | 2000-04-27 | Oxidative pressure leach recovery of precious metals using halide ions |
| CA002367606A CA2367606C (en) | 1999-04-28 | 2000-04-27 | Oxidative pressure leach recovery using halide ions |
| US10/033,385 US20020152845A1 (en) | 1999-04-28 | 2001-10-26 | Oxidative pressure leach recovery of precious metals using halide ions |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/300,878 US6315812B1 (en) | 1999-04-28 | 1999-04-28 | Oxidative pressure leach recovery using halide ions |
| US09/300,878 | 1999-04-28 | ||
| CA2303661 | 2000-04-03 | ||
| CA2,303,661 | 2000-04-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000065111A1 WO2000065111A1 (en) | 2000-11-02 |
| WO2000065111B1 true WO2000065111B1 (en) | 2001-01-25 |
Family
ID=25681695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CA2000/000438 WO2000065111A1 (en) | 1999-04-28 | 2000-04-27 | Oxidative pressure leach recovery of precious metals using halide ions |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1185717A1 (en) |
| AU (1) | AU763167B2 (en) |
| WO (1) | WO2000065111A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20135984A (en) | 2013-10-02 | 2015-04-03 | Outotec Finland Oy | Method and apparatus for separating precious metals from minerals |
| DE102019113198B3 (en) * | 2018-06-22 | 2019-10-24 | Bernd Kunze | Leaching process for precious metals from spent catalysts |
| CN115216640B (en) * | 2022-06-14 | 2023-08-22 | 江西思远再生资源有限公司 | Environment-friendly process for extracting and separating platinum |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3652265A (en) * | 1969-11-28 | 1972-03-28 | Engelhard Min & Chem | Recovery of metal values from nickel-copper mattes |
| ES476055A1 (en) * | 1978-12-15 | 1979-11-01 | Redondo Abad Angel Luis | Process for non-ferrous metals production from complex sulphide ores containing copper, lead, zinc, silver and/or gold |
| US4244735A (en) * | 1979-07-27 | 1981-01-13 | Hazen Research, Inc. | Chloride leach process for recovering metal values in the presence of arsenic |
| US4378275A (en) * | 1981-12-03 | 1983-03-29 | Saudi-Sudanese Red Sea Joint Commission | Metal sulphide extraction |
| US4423011A (en) * | 1982-10-20 | 1983-12-27 | The United States Of America As Represented By The Secretary Of The Interior | Selective recovery of base metals and precious metals from ores |
| GB2128597A (en) * | 1982-10-22 | 1984-05-02 | Davy Mckee | Recovery of metal values from sulphide concentrates |
| US5620585A (en) * | 1988-03-07 | 1997-04-15 | Great Lakes Chemical Corporation | Inorganic perbromide compositions and methods of use thereof |
| SU1766994A1 (en) * | 1990-05-29 | 1992-10-07 | Государственный научно-исследовательский и проектно-конструкторский институт гидрометаллургии цветных металлов | Method for processing of polymetallic sulfide raw |
| US5328669A (en) * | 1993-01-26 | 1994-07-12 | South Dakota School Of Mines And Technology | Extraction of precious metals from ores and other precious metal containing materials using halogen salts |
| RU2079561C1 (en) * | 1993-05-06 | 1997-05-20 | Восточный научно-исследовательский горно-металлургический институт цветных металлов | Method of oxidized polymetallic materials processing |
| US5874055A (en) * | 1993-07-29 | 1999-02-23 | Cominco Engineering Services Ltd. | Chloride assisted hydrometallurgical extraction of metal |
| US5542957A (en) * | 1995-01-27 | 1996-08-06 | South Dakota School Of Mines And Technology | Recovery of platinum group metals and rhenium from materials using halogen reagents |
| US5851499A (en) * | 1996-09-11 | 1998-12-22 | Newmont Gold Company | Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon |
| US5989311A (en) * | 1997-07-28 | 1999-11-23 | South Dakota School Of Mines And Technology | Recovery of copper from its sulfides and other sources using halogen reagents and oxidants |
-
2000
- 2000-04-27 WO PCT/CA2000/000438 patent/WO2000065111A1/en active IP Right Grant
- 2000-04-27 AU AU45295/00A patent/AU763167B2/en not_active Ceased
- 2000-04-27 EP EP20000926596 patent/EP1185717A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP1185717A1 (en) | 2002-03-13 |
| WO2000065111A1 (en) | 2000-11-02 |
| AU4529500A (en) | 2000-11-10 |
| AU763167B2 (en) | 2003-07-17 |
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