WO2015039219A1 - Processes for recovering tantalum and niobium with carbon tetrachloride - Google Patents
Processes for recovering tantalum and niobium with carbon tetrachloride Download PDFInfo
- Publication number
- WO2015039219A1 WO2015039219A1 PCT/CA2014/000704 CA2014000704W WO2015039219A1 WO 2015039219 A1 WO2015039219 A1 WO 2015039219A1 CA 2014000704 W CA2014000704 W CA 2014000704W WO 2015039219 A1 WO2015039219 A1 WO 2015039219A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metallic material
- target metallic
- product
- niobium
- tantalum
- Prior art date
Links
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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G19/00—Compounds of tin
- C01G19/04—Halides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/02—Halides of titanium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G33/00—Compounds of niobium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G35/00—Compounds of tantalum
- C01G35/02—Halides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0009—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
-
- 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
Definitions
- the present disclosure relates to processes for recovering tantalum and niobium, such as, for example, from ores, such as coltan.
- a method of treating solid material wherein the solid material includes target metallic material and one or more other metallic elements, wherein the target metallic material consists of at least one of tantalum and niobium, the method comprising contacting the solid material with a gaseous reagent material within a reaction zone, wherein the gaseous reagent material includes carbon tetrachloride.
- a method of reducing niobium chloride comprising contacting niobium chloride with aluminium.
- a method of reducing tantalum chloride comprising contacting tantalum chloride with aluminium.
- Figure 1 is a flowsheet illustrating an embodiment of the process
- Figure 2 is a flowsheet illustrating another embodiment of the process.
- Figure 3 is a schematic illustration of the experimental set-up for Example
- the solid material includes solid particulate material.
- at least 90 weight % of the solid particulate material has a diameter of less than one millimetre.
- the solid material is an ore, such as coltan ore, a concentrate, or any other solid metal-comprising material.
- the solid material is derived from an ore, such as coltan ore.
- the ore is dried and subjected to size reduction (for example, by crushing, drying, milling and/or grinding) prior to being subjected to the treatment of the process.
- the solid material includes target metallic material and one or more other metallic elements.
- the target metallic material consists of at least one of tantalum and niobium.
- the target metallic material consists of tantalum.
- the target metallic material consists of niobium.
- the target metallic material consists of both of tantalum and niobium.
- the tantalum includes, and in some of these embodiments, consists of, tantalum that is present in one or more oxides of tantalum, or one or more compounds of tantalum.
- the niobium includes, and in some of these embodiments, consists of, niobium that is present in one or more oxides of niobium, or one or more compounds of niobium.
- the solid material includes between 5 weight % and 40 weight % tantalum, based on the total weight of the solid material.
- the solid material includes between 1 weight % and 40 weight % niobium, based on the total weight of the solid material.
- the solid material includes between 10 weight % and 80 weight % target metallic material, based on the total weight of the solid material.
- the one or more other metallic elements include at least one of iron, tin, and titanium.
- the one or more other metallic elements include one or more naturally occurring radioactive elements.
- the one or more naturally occurring radioactive elements includes at least one of uranium and thorium.
- the solid material includes between 0.01 weight % and 0.5 weight % naturally occurring radioactive elements, based on the total weight of the solid material.
- the process 10 comprises contacting the solid material 12 with a gaseous reagent material 14 within a reaction zone 16 to effect production of a gaseous reaction product 18 and a depleted solid material, wherein the gaseous reagent material includes carbon tetrachloride.
- any naturally occurring radioactive elements that are disposed within the solid material, do not, or at least not to any significant degree, participate in any reactive process to effect their depletion from the solid material 12, such that most, if not all, of the naturally occurring radioactive elements remain in the depleted solid material after the contacting.
- the reaction zone 16 is disposed at a temperature of less than 500 degrees Celsius. In some embodiments, for example, the reaction zone 16 is disposed at a temperature of between 300 degrees Celsius and 500 degrees Celsius. In some embodiments, for example, the reaction zone is disposed at a pressure of between 7 bar and 12 bar.
- the gaseous reagent material 14 includes at least 40 mol% carbon tetrachloride, based on the total moles of the gaseous reagent material. In some embodiments, for example, the gaseous reagent material 14 is supplied to the reaction zone 16. In some embodiments, for example, the carbon tetrachloride is generated in-situ within the reaction zone 16.
- the ratio of moles of the carbon tetrachloride to moles of the target metallic material is at least 2.5. In some embodiments, for example, within the reaction zone, the ratio of moles of the carbon tetrachloride to moles of the target metallic material is between 2.5 and 5.
- the solid material 12 consists of the target metallic material and other material, and wherein the contacting effects production of a gaseous reaction product, wherein the ratio of moles of the target metallic material within the gaseous reaction product to moles of the other material within the gaseous reaction product is greater than the ratio of moles of the target metallic material within the solid material to moles of the other material within the solid material.
- the ratio of moles of the target metallic material within the gaseous reaction product to moles of the other material within the gaseous reaction product is greater than the ratio of moles of the target metallic material within the solid material to moles of the other material within the solid material by a multiple of at least 2.
- the process 10 further includes separating, from the gaseous reaction product 18, a target metallic material-rich product 20 and a target metallic material-lean product 22, based on differences in volatility as between the target metallic material-rich product and the target metallic material-lean product.
- the separating is effected after the reaction in the reaction zone 16 has been substantially completed (for example, 30 minutes after commencement of the reaction), and after the gaseous reaction product 18 has been vented from the reaction zone 16.
- the concentration of the target metallic material within the target metallic material-rich product 20 is greater than the 4 concentration of the target metallic material within the target metallic material-lean product 22.
- the method further includes separating, from the gaseous reaction product 18, a target metallic material-rich product 20, based on differences in volatility as between the target metallic material-rich product 20 and a residue, deriving from the gaseous reaction product, whose production is also effected by the separating.
- the concentration of the target metallic material within the target metallic material -rich product 20 is greater than the concentration of the target metallic material within the residue.
- the separating, from the gaseous reaction product 18, of a target metallic material-rich product 20 and a target metallic material-lean product 22 (or a residue), based on differences in volatility as between the target metallic material-rich product and the target metallic material-lean product (or the residue, as the case may be), includes cooling the gaseous reaction product in a cooling zone 24 so as to effect desublimation of at least a fraction of the gaseous reaction product and effect production of a desublimed product 26.
- the cooling zone 24 is disposed at a temperature of between 80 degrees Celsius and 100 degrees Celsius, and at atmospheric pressure.
- At least a fraction of the gaseous reaction product remains gaseous, and such fraction is discharged as an off-gas.
- the off-gas is cooled to remove excess carbon tetrachloride, and such excess carbon tetrachloride can be recycled to the reaction zone 16. Any remaining gaseous material, after this cooling step, can be combusted.
- the desublimed product is heated in a heating zone 28 so as to effect sublimation of at least a fraction of the solidified desublimed product and thereby effect production of a sublimed product 30 and a residue.
- the heating zone 28 is disposed at a temperature of between 150 degrees Celsius and 300 degrees Celsius, and at atmospheric pressure.
- the sublimed product 30 includes, or consists of, the target metallic material-rich product 20.
- the residue 32 includes, or consists of, the target metallic material-lean product 22.
- the gaseous reaction product 18 includes iron chloride, and the residue 32 includes iron.
- the sublimed product 30 is supplied to a fractional distillation unit operation 34, and the sublimed product is fractionated by distillaton into a tantalum-rich separation product 36 and a niobium-rich separation product 38.
- the tanatalum-rich separation product includes tantalum in the form of tantalum chloride.
- the niobium-rich separation product includes niobium in the form of niobium chloride.
- the tantalum-rich separation product is a more volatile fraction ("lighter") than the niobium-rich separation product. In some embodiments, for example, further heavier and lighter streams are separated from the sublimed product.
- a more volatile separation product including tin and titanium chlorides, and more volatile than both of the tantalum-rich separation product and the niobium-rich separation product, is recovered.
- the fractional distillation unit operation 34 is operated within a temperature range of between 200 degrees Celsius and 400 degrees Celsius, and at atmospheric pressure.
- each one of the tantalum-rich separation product 36 and the niobium-rich separation product 38 is contacted with aluminium.
- Contacting the tantalum-rich separation product 36 with aluminium in a first reaction zone 40 effects reduction of tantalum and thereby effect production of tantalum metal.
- Contacting the niobium-rich separation product 38 with aluminium in a second reaction zone 42 effects reduction of niobium and thereby effect production of niobium metal.
- both of the first and second reaction zones 40, 42 are disposed at a temperature of between 500 degrees Celsius and 800 degrees Celsius, and at atmospheric pressure.
- the aluminium chloride is recovered and further processed to effect recovery of chlorine, and then the chlorine is further processed to effect production of carbon tetrachloride for contacting with the solid material of the process.
- process 1 10 comprises contacting the solid material 102 with a gaseous reagent material 104 within a reaction zone 106 to effect production of a gaseous reaction product and a depleted solid material, wherein the gaseous reagent material includes carbon tetrachloride.
- any naturally occurring radioactive elements that are disposed within the solid material, do not, or at least not to any significant degree, participate in any reactive process to effect their depletion from the solid material 102, such that most, if not all, of the naturally occurring radioactive elements remain in the depleted solid material after the contacting.
- the reaction zone 106 is disposed at a temperature of less than 500 degrees Celsius. In some embodiments, for example, the reaction zone 106 is disposed at a temperature of between 300 degrees Celsius and 500 degrees Celsius. In some embodiments, for example, the reaction zone is disposed at a pressure of between 7 bar and 12 bar.
- the gaseous reagent material 104 includes at least 40 mol% carbon tetrachloride, based on the total moles of the gaseous reagent material.
- the gaseous reagent material 104 is supplied to the reaction zone 106.
- the carbon tetrachloride is generated in-situ within the reaction zone 106.
- the ratio of moles of the carbon tetrachloride to moles of the target metallic material is at least 2.5. In some embodiments, for example, within the reaction zone, the ratio of moles of the carbon tetrachloride to moles of the target metallic material is between 2.5 and 5.
- the solid material 102 consists of the target metallic material and other material, and wherein the contacting effects production of a gaseous reaction product, wherein the ratio of moles of the target metallic material within the gaseous reaction product to moles of the other material within the gaseous reaction product is greater than the ratio of moles of the target metallic material within the solid material to moles of the other material within the solid material.
- the ratio of moles of the target metallic material within the gaseous reaction product to moles of the other material within the gaseous reaction product is greater than the ratio of moles of the target metallic material within the solid material to moles of the other material within the solid material by a multiple of at least 2.
- the reaction zone is cooled down below 100 degrees Celsius to effect desublimation of the gaseous reaction product, and remaining off-gases are vented for carbon tetrachloride recovery (as described above with respect to the embodiment illustrated in Figure 1).
- the reactor is then heated to between 400 degrees Celsius and 700 degrees Celsius to effect sublimation of the desublimed product and thereby effect production of sublimed product 108.
- the sublimed product 108 is discharged from the reaction zone 106, and is supplied to an absorption unit operation 1 12.
- the sublimed product 108 consists of target metallic material and other material.
- the absorption unit operation 1 12 preferentially absorbs the other material, relative to the target metallic material, such that a gaseous target metallic material-rich absorption unit product 114 is produced by the absorption unit operation.
- the concentration of target metallic material is greater within the target metallic material-rich absorption unit product 114 than within the sublimed product 108.
- the absorption unit operation 1 12 is an absorber including solid absorbent media including sodium chloride or any one or more other alkaline chlorides.
- the sublimed product 108 is flowed across the solid absorbent media to effect contacting between the sublimed product 108 and the solid absorbent media.
- the contacting effects a reactive process, and at least a fraction of the sublimed product 108 is consumed during the reactive process to effect production of an absorption unit reaction product that becomes disposed on the absorbent and thereby removed from the sublimed product 108 so as to effect production of the gaseous target metallic material-rich absorption unit product 1 14.
- the other material includes iron
- the gaseous reaction product includes iron chloride
- the absorption unit reaction product includes NaFeCl 4 .
- the absorber is operated at a temperature of between 400 degrees Celsius and 700 degrees Celsius, and at atmospheric pressure.
- the absorbed NaFeCl 4 is stripped from the solid media absorbent and then processed for effecting recovery of the chlorine, which can then be further processed to produce carbon tetrachloride, which then can be used for contacting the solid material of the process 1 10.
- multiple absorbers are provided so that, while one absorber is receiving the sublimed product 108, another absorber is operating in a regeneration mode, having previously absorbed NaFeCl 4 stripped from the solid media adsorbent so as to regenerate the solid media absorbent for contacting with the sublimed product 108.
- the target metallic material -rich absorption unit product 114 is supplied to a fractional distillation unit operation 1 16, and the target metallic material-rich absorption unit product is fractionated by distillaton into a tantalum-rich separation product 1 18 and a niobium-rich separation product 120.
- the tanatalum-rich separation product 118 includes tantalum in the form of tantalum chloride.
- the niobium-rich separation product 120 includes niobium in the form of niobium chloride.
- the tantalum-rich separation product 118 is a more volatile fraction ("lighter") than the niobium-rich separation product 120. In some embodiments, for example, further heavier and lighter streams are separated from the target metallic material-rich absorption unit product.
- a more volatile separation product including tin and titanium chlorides, and more volatile than both of the tantalum-rich separation product and the niobium-rich separation product, is recovered.
- the fractional distillation unit operation 1 16 is operated within a temperature range of between 200 degrees Celsius and 400 degrees Celsius, and at atmospheric pressure.
- each one of the tantalum-rich separation product 1 18 and the niobium-rich separation product 120 is contacted with gaseous hydrogen. Contacting the tantalum-rich separation product 1 18 with gaseous hydrogen in a first reaction zone 122 effects reduction of tantalum and thereby effect production of tantalum metal.
- both of the first and second reaction zones 122, 124 are disposed at a temperature of between 900 degrees Celsius and 1500 degrees Celsius, and at atmospheric pressure.
- Both contacting steps effect production of gaseous hydrochloric acid.
- the gaseous hydrochloric acid is recovered and further processed to recover chlorine, and the recovered chlorine is further processed to effect production of carbon tetrachloride which can be used for contacting of the solid material of the process.
- the resultant product was free of any radioactive material.
- the chloride mixture was stored under argon, and used for further refining steps.
- the mixture was transferred under argon to a sublimation apparatus, and sublimed to produced niobium and tantalum chlorides.
- the chlorides were permitted to de-sublime on the wall, and were then collected and analyzed. Analysis showed only niobium and tantalum chlorides present in the de-sublimed material. The remains at the bottom of the sublimation beaker included mainly iron chloride.
- the tantalum and niobium chlorides were then distilled out and then reduced with aluminium to produce niobium and tantalum metals.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/023,642 US20160208363A1 (en) | 2013-09-20 | 2014-09-19 | Processes for recovering tantalum and niobium with carbon tetrachloride |
CA2924921A CA2924921C (en) | 2013-09-20 | 2014-09-19 | Processes for recovering tantalum and niobium with carbon tetrachloride |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361880665P | 2013-09-20 | 2013-09-20 | |
US61/880,665 | 2013-09-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015039219A1 true WO2015039219A1 (en) | 2015-03-26 |
Family
ID=52688036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2014/000704 WO2015039219A1 (en) | 2013-09-20 | 2014-09-19 | Processes for recovering tantalum and niobium with carbon tetrachloride |
Country Status (3)
Country | Link |
---|---|
US (1) | US20160208363A1 (en) |
CA (1) | CA2924921C (en) |
WO (1) | WO2015039219A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2766112A (en) * | 1952-11-17 | 1956-10-09 | Heraeus Gmbh W C | Production of metallic tantalum and metallic niobium from mixtures of compounds thereof |
US2905545A (en) * | 1956-05-17 | 1959-09-22 | Nova Beaucage Mines Ltd | Method of separating metals from ores and concentrates |
GB833241A (en) * | 1955-08-04 | 1960-04-21 | Ciba Ltd | Process for separating niobium and tantalum from materials containing these metals |
US3212847A (en) * | 1962-02-26 | 1965-10-19 | Dominion Gulf Company | Reductive chlorination of activated ores containing high melting metals |
-
2014
- 2014-09-19 US US15/023,642 patent/US20160208363A1/en not_active Abandoned
- 2014-09-19 WO PCT/CA2014/000704 patent/WO2015039219A1/en active Application Filing
- 2014-09-19 CA CA2924921A patent/CA2924921C/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2766112A (en) * | 1952-11-17 | 1956-10-09 | Heraeus Gmbh W C | Production of metallic tantalum and metallic niobium from mixtures of compounds thereof |
GB833241A (en) * | 1955-08-04 | 1960-04-21 | Ciba Ltd | Process for separating niobium and tantalum from materials containing these metals |
US2905545A (en) * | 1956-05-17 | 1959-09-22 | Nova Beaucage Mines Ltd | Method of separating metals from ores and concentrates |
US3212847A (en) * | 1962-02-26 | 1965-10-19 | Dominion Gulf Company | Reductive chlorination of activated ores containing high melting metals |
Non-Patent Citations (3)
Title |
---|
BROCCHI E.A. ET AL.: "Chlorination methods applied to recover refractory metals from tin slags.", MINERALS ENGINEERING, vol. 21, no. 2, January 2008 (2008-01-01), pages 150 - 156, XP022383730, DOI: doi:10.1016/j.mineng.2007.08.011 * |
HENDERSON A.W. ET AL.: "Chlorination of Euxenite Concentrates.", INDUSTRIAL & ENGINEERING CHEMISTRY, vol. 50.4, 1958, pages 611 - 612 * |
SHAINYAN B.A. ET AL.: "Novel Technology for Chlorination of Niobium and Tantalum Oxides and Their Low-Grade Ore Concentrates.", JOURNAL OF MINERALS AND MATERIALS CHARACTERIZATION AND ENGINEERING, vol. 7, no. 2, 2008, pages 163 - 173, Retrieved from the Internet <URL:http://file.scirp.org/Html/20526.html> * |
Also Published As
Publication number | Publication date |
---|---|
CA2924921A1 (en) | 2015-03-26 |
CA2924921C (en) | 2023-04-04 |
US20160208363A1 (en) | 2016-07-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Van Nguyen et al. | Study of adsorption behavior of a new synthesized resin containing glycol amic acid group for separation of scandium from aqueous solutions | |
Purnomo et al. | Lithium recovery from spent Li-ion batteries using coconut shell activated carbon | |
US9102999B2 (en) | Methods of recovering scandium from titanium residue streams | |
US20120207656A1 (en) | System and Method for Recovery of Scandium Values From Scandium-Containing Ores | |
US20120204680A1 (en) | System and Method for Recovery of Nickel Values From Nickel-Containing Ores | |
JP2015535886A (en) | Process for preparing alumina and magnesium chloride by HCl leaching of various materials | |
NO884023L (en) | PROCEDURE FOR SCANDIUM EXPLORATION. | |
KR20200059192A (en) | How to recover lithium | |
JP6727918B2 (en) | Sc recovery method | |
CN106319199B (en) | Pretreatment method of antimony-and arsenic-containing refractory gold ore | |
JP6533122B2 (en) | Method of manufacturing titanium tetrachloride | |
CN108220614A (en) | The method that platinum rhenium is separated and recovered from dead catalyst | |
KR20170019246A (en) | A recovery method for valuable metal from the LED wastes or electronic wastes | |
CN109371239B (en) | Method for treating low-grade fluorite ore containing rare earth | |
CA2924921C (en) | Processes for recovering tantalum and niobium with carbon tetrachloride | |
JP5897488B2 (en) | Method for producing titanium tetrachloride | |
US11299796B2 (en) | Method for recovering a minor metal and/or rare-earth metal | |
JP2018150588A (en) | Method for recovering scandium | |
US3165376A (en) | Process for separation and recovery of volatile fluoride impurities from uranium hexafluoride containing the same | |
JP3303066B2 (en) | How to purify scandium | |
MXPA06000236A (en) | Mechanical separation of volatile metals at high temperatures. | |
US9279168B2 (en) | Process for recovery of technical grade molybdenum from diluted leaching acid solutions (PLS), with highly concentrated arsenic, from metallurgical residues | |
JP7486021B2 (en) | Method for producing cadmium hydroxide | |
WO2007062434A2 (en) | A mineral recovery process | |
US2890099A (en) | Recovery of uranium from low grade uranium bearing ores |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14845267 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2924921 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15023642 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14845267 Country of ref document: EP Kind code of ref document: A1 |