AP140A - Dissolving values of platinum group metals from ores and concentrates. - Google Patents
Dissolving values of platinum group metals from ores and concentrates. Download PDFInfo
- Publication number
- AP140A AP140A APAP/P/1990/000185A AP9000185A AP140A AP 140 A AP140 A AP 140A AP 9000185 A AP9000185 A AP 9000185A AP 140 A AP140 A AP 140A
- Authority
- AP
- ARIPO
- Prior art keywords
- atom
- solution
- platinum group
- palladium
- platinum
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 title claims abstract description 24
- -1 platinum group metals Chemical class 0.000 title claims abstract description 15
- 239000012141 concentrate Substances 0.000 title claims description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 16
- 229910052763 palladium Inorganic materials 0.000 claims description 15
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 claims description 8
- 150000001450 anions Chemical class 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 150000004820 halides Chemical class 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052711 selenium Inorganic materials 0.000 claims description 3
- 239000011669 selenium Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 150000003497 tellurium Chemical class 0.000 claims description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- LULLIKNODDLMDQ-UHFFFAOYSA-N arsenic(3+) Chemical compound [As+3] LULLIKNODDLMDQ-UHFFFAOYSA-N 0.000 claims description 2
- 125000000446 sulfanediyl group Chemical group *S* 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 229910052785 arsenic Inorganic materials 0.000 description 5
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 5
- 238000002386 leaching Methods 0.000 description 4
- 239000003446 ligand Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- GOLCXWYRSKYTSP-UHFFFAOYSA-N Arsenious Acid Chemical compound O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910019093 NaOCl Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical class [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 238000009852 extractive metallurgy Methods 0.000 description 1
- 238000009291 froth flotation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000001483 mobilizing effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 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
- C22B3/16—Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
- C22B3/1608—Leaching with acyclic or carbocyclic agents
- C22B3/1616—Leaching with acyclic or carbocyclic agents of a single type
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Platinum group metals are recovered from
Description
VALUE! QE PLATINUM-GROUP METALS
EBQM.QRSS. AWP CONCENTRATES
Platinum group metals are recovered fro® lower-grade ores than hitherto considered economic by Uxlvlatlon with aqueous arsenate or thiosulphate, plus halide, 1n air.
ID 100010 890UN
AP 0 0 0 1 4 0
UCC Qg-LI
D-ISSQkYiNG VAULSS Qf.JtAUHUM. GROULHEIAkS
This invention relates to a method of dissolving values of platinum group metals from ores and concentrates, for subsequent treatment for recovery of the metal. The platinum group* of metals Is: ruthenium, rhodium, palladium, osmium, Iridium and platinum. The method Is especially applicable to palladium and platinum, which are normally regarded, when 1n ore, as difficult to raise to an oxidation number at which they will form water-soluble compounds.
Although alluvial and other mineral deposits of platinum group metals are the result of natural concentration processes Involving weathering and gravity-separation phenomena, considerable additional treatment Is required to yield a product suitable for marketing. After treatments which might typically include crushing, froth flotation and gravity separation, part of the resultant material might be sent directly to the refinery. The remainder 1s concentrated further by smelting, oxygen blowing, magnetic separation, and pressure leaching (removing e.g. nickel which has been solubilised) to yield a final concentrate, a SOX residue of platinum group metals.
Most refining procedures take advantage of the ready solubility of platinum and palladium (and gold) In aqua regia, which does not dissolve the other platinum group metals (ruthenium, rhodium, osmium and Iridium) and Indeed It 1s conventional wisdom that only highly oxidising substances of this type will dissolve elemental palladium and platinum. (US Patent 4337226 suggests H2SO4 plus either NaOCl or H2O2.> Platinum Is indeed known for Its property of remaining unattacked by for example hot sulphur dioxide, and functioning for years as a catalyst for oxidising that gas at 600’C. It Is therefore most unexpected that sulphur-oxygen compounds can be used to dissolve values of platinum group metals.
APO 0 014 0
BAD ORIGINAL
- 2 According to the present Invention, a method of dissolving platinum group metals from ores or concentrates comprises lixiviating the ore or concentrate in the presence of an oxidant with an aqueous solution containing a material being a compound or polyelemental anion having an atom In a lower oxidation state, and which material 1s stable 1n the presence of the oxidant and can co-ordinate a platinum group cation through the said atom. A lower oxidation state 1s any non-zero oxidation state lower than the highest normally attained, which In the case of for example sulphur Is taken as 6, and arsenic 5. The counter Ion of the anion 1f present may be an alkaline earth or alkali metal, conveniently sodium. The solution 1s preferably at least 10“4m in said atom, preferably at least 1O^M, most preferably at least 10^M, and usefully at least 0.04M. It Is preferably under IK, more preferably under KM.
Examples of such waterIj^ls are: As(OHWffiRia 1 ttlflflforeof: organic sulphides and thio derivatives e.g.tMoketonejsuch as thiourea H2MCSMH2; thiosulphate SjOj-”; difhlonite SjOj—^and polythlonate (O3S-SX-SO3)~, and the selenium and tellurium analogues (where they exist) of these sulphur materials. As llxlvlants In extractive metallurgy go, some of these are not costly and some are relatively mild environmentally.
In the case of (for example) thiosulphate, It Is postulated that because the thiosulphate Ion Is a soft donor (via sulphur).
it effectively lowers the redox potential at which the metals are oxidized. An Important cooperative effect In practice 1s Its fast rate of oxidation of the metals, especially palladium and platinum, particularly In the presence of the appropriate ligands, to form coordination complexes under ambient conditions.
- 3 This discovery represents a novel way of extracting platinum group elements from their ores and concentrates by a simple leaching procedure using cheap and readily available reagents. It Is also the case that since bulk leaching operations are
OS relatively Inexpensive, lower grade ores than have been hitherto thought to be economic and deposits which have hitherto not been mined for their platinum group metals content could now be exploited, such as the low-grade deposits of Pt and Pd concentrated during weathering of mafic and ultramaflc rocks such as In the Flfield, NSH area and In weathered sulphide ores (gossans and the like) overlying primary sulphides In certain of the deposits of the West Australian shield.
Arsenic (IIP species preferably 1n acid solution (more preferably pH 3-0 may be used especially for mobilizing palladium.
Preferably, means are employed to Inactivate microbes such as Thiobacl)11 which couldl medlatF th· concentrations of the llxlvlants during the dissolution.
Preferably other ligating anions are additionally present 20 such as halide. Chloride 1s convenient, and bromide and iodide are better although 1n practice disproportionately more costly.
The oxidant which must be present 1s most conveniently oxygen In air at ambient temperature and pressure.
The duration of the llxlviatlon Is preferably at least 7 25 days, more preferably at least 12 days.
The resulting solution of platinum group metal(s) is then normally separated from the residual solids, and then treated to recover the metal(s).
APO 0 0 1 4 0
BAD ORIGINAL ft
I . 4 .
The Invention will now be decrlbed by way of example.
EXAMPLE 1
A fixed mass of comminuted ore containing platinum and palladium was leached with a fixed volume of 0.001 molar aqueous sodium thiosulphate under recycling conditions at ambient temperatures 'ca 20*0 1η the presence of air. The pH of the solution was maintained at a fixed value above 6 (otherwise the thiosulphate would have decomposed) via the use of sodium carbonate Na^COj, sodium hydrogen carbonate NaHCOj, sodium hydroxide NaOH, lime CaO or Ca(OH)2 and/or calcium carbonate CaCOj. The rate of dissolution of platinum and palladium was monitored from time to time by taking samples and analysing for dissolved metals with the results below. When amounts in solution were judged to be sufficient, the solution was filtered to remove solids and the dissolved values recovered by (1) oxidation of the contained thiosulphate topro0uce a precipitate containing the values or (11) reduction ~oF~the values with an appropriate reducing agent e.g. zinc to precipitate the platinum group metals as a concentrate ready for further refining.
Palladium Concentration
APO 0 014 0
Thiosulphate In Solution
| concentration | fih | after.!* .days | After 23 dayi |
| 0.001M | 8 9 | 35 ppm | |
| 0.01M | 8 9 | 32 ppm | *1 ppm |
| 0.05M | 85 | *4 ppm | 56 ppm |
| 0.1M | 8.5 | 70 ppm | 97 ppm (32 days) |
EXAMPLE 2
Leaching Is made more effective In certain instances for certain metals by addition of auxiliary ligands. Example 1 was repeated with the additional reagent sodium chloride present In solution at a concentration of 0.01 molar. Iridium was leached from the ore.
EXAMPLE 3
Palladium was leached from a sample of ore In a manner 10 analogous to that described above, but using (instead of thiosulphate) sodium arseMte or arsenic (III) oxide dissolved 1η water <0.05 molar In arsenic In either case) and which was made acid to a fixed pH below 5 with hydrochloric add, 1n the presence of air at ambient temperatures. At higher values of pH, arsenic (III) can form AsfOH)*, a hard ligand 1n which moreover the arsenic atom is burled* and no longer available to ligate palladium. The HC1 both prevented this and provided Cl Ions as auxiliary ligands. —
Mttr 15 days In each case, the palladium concentration In the solution was measured, and compared with the result when arsenic was omitted.
| pH told At | ppgLPd uslngarsenlc | m>-£d oiiiLtt Lag irmh |
| 2 | 90 | 20 |
| 3 | 175 | 4 |
| 4 | 16 | not detectable |
| 5 | 5 | not detectable |
Claims (18)
1, A method of dissolving platinum group metals from ores or concentrates, comprising lixiviating the ore or concentrate In the presence of an oxidant with an aqueous solution containing a material being a compound or polyelementa 1 anion having an atom
05 1n a lower oxidation state as hereinbefore defined, and which material Is stable In the presence of the oxidant and can co-ordinate a platinum group cation through the said atom.
2. A method according to Claim 1, wherein the counter 1on of the anion 1s an alkaline earth or alkali metal.
10 3. A method according to Claim 1 or 2, wherein the aqueous solution is at least 1O~*M in said atom.
least 0.04M in said atom.
7. A method according to any preceding claim, wherein the aqueous solution is under 1H In said atom.
20
8. A method according to Claim 7, wherein the solution Is under
XM In said atom.
9. A method according to any preceding claim, wherein the platinum group metal 1$ platinum and/or palladium.
10. A method according to any preceding claim, wherein the said
25 material 1s: AsCOH)^ or a salt thereof; or an organic sulphide or thio derivative or Its selenium or tellurium analogue.
11. A method according to any of Claims 1 to 9, wherein the said material is thiosulphate, dlthlonate or polythlonate or Its selenium or tellurium analogue.
30
12. A method according to Claim 10, wherein palladium Is dissolved and wherein the said material is arsenlc(III).
13. A method according to Claim 12, wherein the arsenic(III) Is
APO 00 1
14. A method according to Claim 13, wherein the arjenlc(Ill) solution has a pH of 3 to <.
15. A method according to any preceding claim, further comprising means to Inactivate microbes during the dissolution.
16. A method according to any preceding claim, wherein other Ugatlng anions are additionally present.
17. A method according to Claim 16, wherein said other ligating anions comprise halide.
18. A method according to any preceding claim, wherein said oxidant 1$ oxygen In the air.
19. A method according to any preceding claim, wherein the duration of the 1ixlvlatlon Is at least 7 days.
20. A method according to Claim 19, wherein the duration of the 1Ixlvlatlon Is at least 12 days.
21. A method according to any preceding claim, further comprising separating the resulting solution of platinum group metal(s) from the reslldual solids.
22. A method according to Claim 21, further comprising treating the separated solution to recover the metal(s).
AP 0 0 0 1 4 0
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898914037A GB8914037D0 (en) | 1989-06-19 | 1989-06-19 | Dissolving values of platinum group metals from ores and concentrates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AP9000185A0 AP9000185A0 (en) | 1990-07-31 |
| AP140A true AP140A (en) | 1991-08-21 |
Family
ID=10658673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| APAP/P/1990/000185A AP140A (en) | 1989-06-19 | 1990-06-15 | Dissolving values of platinum group metals from ores and concentrates. |
Country Status (14)
| Country | Link |
|---|---|
| EP (1) | EP0479814B1 (en) |
| JP (1) | JPH05500239A (en) |
| AP (1) | AP140A (en) |
| AT (1) | ATE96182T1 (en) |
| AU (1) | AU638721B2 (en) |
| BR (1) | BR9007462A (en) |
| CA (1) | CA2058969A1 (en) |
| DE (1) | DE69004091T2 (en) |
| DK (1) | DK0479814T3 (en) |
| ES (1) | ES2046785T3 (en) |
| FI (1) | FI95603C (en) |
| GB (1) | GB8914037D0 (en) |
| WO (1) | WO1990015887A1 (en) |
| ZA (1) | ZA904747B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354359A (en) * | 1992-04-01 | 1994-10-11 | Newmont Gold Co. | Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
| RU2175678C1 (en) * | 2000-05-03 | 2001-11-10 | ОАО "Красноярский завод цветных металлов имени В.Н. Гулидова" | Method of purification of ruthenium |
| US6660059B2 (en) | 2000-05-19 | 2003-12-09 | Placer Dome Technical Services Limited | Method for thiosulfate leaching of precious metal-containing materials |
| US7722840B2 (en) | 2002-11-15 | 2010-05-25 | Placer Dome Technical Services Limited | Method for thiosulfate leaching of precious metal-containing materials |
| US8715389B2 (en) | 2010-12-07 | 2014-05-06 | Barrick Gold Corporation | Co-current and counter current resin-in-leach in gold leaching processes |
| AR086933A1 (en) | 2011-06-15 | 2014-01-29 | Barrick Gold Corp | METHOD FOR RECOVERING PRECIOUS METALS AND COPPER OF LIXIVIATE SOLUTIONS |
| US10161016B2 (en) | 2013-05-29 | 2018-12-25 | Barrick Gold Corporation | Method for pre-treatment of gold-bearing oxide ores |
| JP6835577B2 (en) * | 2016-12-28 | 2021-02-24 | Ｊｘ金属株式会社 | How to collect valuables |
| PE20211512A1 (en) | 2019-01-21 | 2021-08-11 | Barrick Gold Corp | METHOD FOR CARBON-CATALYZED THOSULFATE LEACHING OF MATERIALS CONTAINING GOLD |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3401961A1 (en) * | 1983-02-22 | 1984-08-23 | Skw Trostberg Ag, 8223 Trostberg | Hydrometallurgical extraction of noble metals using thiourea |
| GB2181722A (en) * | 1985-08-15 | 1987-04-29 | Roger Harper Little | Method for the recovery of precious metals from ores |
| US4925485A (en) * | 1983-12-27 | 1990-05-15 | Skw Trostberg Aktiengesellschaft | Process for the isolation of noble metals |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE95444C (en) * | ||||
| US3545965A (en) * | 1968-06-27 | 1970-12-08 | Albert L Jacobs | Chemical gold mining |
| ZA84929B (en) * | 1983-02-22 | 1984-09-26 | Sueddeutsche Kalkstickstoff | Hydrometallurgical recovery of noble metals using thiourea |
| US4645535A (en) * | 1985-08-15 | 1987-02-24 | Little Roger H | Method for the recovery of precious metals from ores |
| ZW18286A1 (en) * | 1985-09-10 | 1987-05-27 | Butler Dean | Leaching process |
-
1989
- 1989-06-19 GB GB898914037A patent/GB8914037D0/en active Pending
-
1990
- 1990-06-15 AP APAP/P/1990/000185A patent/AP140A/en active
- 1990-06-18 BR BR909007462A patent/BR9007462A/en not_active Application Discontinuation
- 1990-06-18 ES ES199090909059T patent/ES2046785T3/en not_active Expired - Lifetime
- 1990-06-18 AT AT90909059T patent/ATE96182T1/en active
- 1990-06-18 JP JP2508660A patent/JPH05500239A/en active Pending
- 1990-06-18 EP EP90909059A patent/EP0479814B1/en not_active Expired - Lifetime
- 1990-06-18 CA CA002058969A patent/CA2058969A1/en not_active Abandoned
- 1990-06-18 DK DK90909059.9T patent/DK0479814T3/en active
- 1990-06-18 AU AU58279/90A patent/AU638721B2/en not_active Ceased
- 1990-06-18 WO PCT/GB1990/000938 patent/WO1990015887A1/en not_active Ceased
- 1990-06-18 DE DE90909059T patent/DE69004091T2/en not_active Expired - Fee Related
- 1990-06-19 ZA ZA904747A patent/ZA904747B/en unknown
-
1991
- 1991-12-18 FI FI915976A patent/FI95603C/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3401961A1 (en) * | 1983-02-22 | 1984-08-23 | Skw Trostberg Ag, 8223 Trostberg | Hydrometallurgical extraction of noble metals using thiourea |
| US4925485A (en) * | 1983-12-27 | 1990-05-15 | Skw Trostberg Aktiengesellschaft | Process for the isolation of noble metals |
| GB2181722A (en) * | 1985-08-15 | 1987-04-29 | Roger Harper Little | Method for the recovery of precious metals from ores |
Also Published As
| Publication number | Publication date |
|---|---|
| DK0479814T3 (en) | 1994-02-07 |
| AU5827990A (en) | 1991-01-08 |
| AU638721B2 (en) | 1993-07-08 |
| DE69004091D1 (en) | 1993-11-25 |
| FI915976A0 (en) | 1991-12-18 |
| ES2046785T3 (en) | 1994-02-01 |
| FI95603C (en) | 1996-02-26 |
| EP0479814B1 (en) | 1993-10-20 |
| CA2058969A1 (en) | 1990-12-20 |
| ZA904747B (en) | 1992-02-26 |
| JPH05500239A (en) | 1993-01-21 |
| AP9000185A0 (en) | 1990-07-31 |
| WO1990015887A1 (en) | 1990-12-27 |
| GB8914037D0 (en) | 1989-08-09 |
| FI95603B (en) | 1995-11-15 |
| DE69004091T2 (en) | 1994-05-05 |
| ATE96182T1 (en) | 1993-11-15 |
| EP0479814A1 (en) | 1992-04-15 |
| BR9007462A (en) | 1992-06-16 |
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