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WO2001004366A1 - Desoxydation de solutions d'extraction phosphoniques/phosphiniques chargees en lanthanides en presence d'oxyde de phosphine - Google Patents

Desoxydation de solutions d'extraction phosphoniques/phosphiniques chargees en lanthanides en presence d'oxyde de phosphine Download PDF

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Publication number
WO2001004366A1
WO2001004366A1 PCT/US2000/018359 US0018359W WO0104366A1 WO 2001004366 A1 WO2001004366 A1 WO 2001004366A1 US 0018359 W US0018359 W US 0018359W WO 0104366 A1 WO0104366 A1 WO 0104366A1
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Prior art keywords
acid
lanthanide
process according
component
extractant
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Ceased
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PCT/US2000/018359
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English (en)
Inventor
Christina Pagnucco
Boban Jakovljevic
Donato Nucciarone
William Rickelton
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Cytec Technology Corp
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Cytec Technology Corp
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Priority to AU57864/00A priority Critical patent/AU5786400A/en
Publication of WO2001004366A1 publication Critical patent/WO2001004366A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C22B59/00—Obtaining rare earth metals
    • 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
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
    • C22B3/382—Phosphine chalcogenides, e.g. compounds of the formula R3P=X with X = O, S, Se or Te
    • 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
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
    • C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
    • C22B3/3842—Phosphinic acid, e.g. H2P(O)(OH)
    • 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
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
    • C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
    • C22B3/3844—Phosphonic acid, e.g. H2P(O)(OH)2
    • 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
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/40—Mixtures
    • C22B3/408—Mixtures using a mixture of phosphorus-based acid derivatives of different types
    • 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

  • This invention relates to a method for stripping lanthanide-loaded solvent.
  • the lanthanides also known as the rare earths, comprise elements 57 to 71 of the Periodic Table. Depending upon the atomic number of the element, this series is often divided into three sub-groups i.e. the light, medium and heavy rare earths. The lightest is lanthanum with atomic number 57. In contrast, the four heavy rare earths are erbium, thullium, ytterbium, and lutetium with atomic numbers of 68, 69, 70, and 71, respectively. Scandium, atomic number 21, and yttrium, atomic number 39, are often found with, and discussed with, the lanthanides. In nature, they are generally found in their oxide form, and are commercially isolated from monazi te,
  • red mud that is produced as a by-product of the Bayer process for producing alumina.
  • the Bayer process for producing alumina comprises, as its first step, leaching or digesting bauxite or similar crude ores with a solution of sodium hydroxide to extract alumina minerals contained therein as a solution of sodium aluminate.
  • This red mud typically contains substantial amounts of silica, alumina, iron oxide, titania and sodium compounds.
  • Many red muds also contain small but valuable quantities of lanthanide elements, and in some cases include significant quantities of scandium and yttrium.
  • red mud is digested with dilute mineral acid, the lanthanide elements, and scandium and yttrium, selectively dissolve in the acid, together with sodalite and calcium compounds, leaving iron and titanium in the red mud substantially undissolved.
  • suitable acids include hydrochloric, nitric, sulphuric, and sulphurous acids.
  • the aqueous acidic lanthanide solution is contacted counter-currently or co-currently with an extractant solution comprising a water-immiscible organic solvent containing the mono-2-ethylhexyl ester of mono-2- ethylhexylphosphonic acid, known as MEPA, or di (2-ethylhexyl) phosphoric acid, known as DEPA.
  • MEPA mono-2-ethylhexyl ester of mono-2- ethylhexylphosphonic acid
  • DEPA di (2-ethylhexyl) phosphoric acid
  • the lanthanide is extracted from the aqueous acidic solution into the water-immiscible organic solvent.
  • the organic solution containing the extracted lanthanide (s) is then stripped with an acid such as hydrochloric, nitric, or sulphuric acid to remove the lanthanide (s) from the organic solution.
  • the lanthanide passes into the acidic
  • U.S. Patent 5,639,433 teaches the use of an extractant solution containing an organophosphonic acid, such as MEPA, in combination with an organophosphinic acid, such as bis (2 , , 4-trimethylpentyl)phosphinic acid (BTPP) for the extraction of rare earths.
  • an organophosphonic acid such as MEPA
  • an organophosphinic acid such as bis (2 , , 4-trimethylpentyl)phosphinic acid (BTPP)
  • BTPP is commercially available from Cytec as
  • CYANEXTM 272 but this product also contains tris (2,4,4- trimethylpentyl) phosphine oxide, in an amount of approximately 12-14%, and mono-2 , 4 , 4-trimethyl-pentylphosphonic acid, in an amount of approximately 1%. Thus, there is present about 13.8% to about 16.5% of tris- (2 , 4 , 4 -trimethylpentyl) phosphine oxide, based on the amount of BTPP.
  • this invention provides a process for stripping a lanthanide from a lanthanide-containing extractant solution which process comprises :
  • R 1 and R 2 may be the same or different and each represents a C 4 _ 12 substituted or unsubstituted alkyl group or a C 4 _ 8 substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted phenyl group,
  • Z 1 and Z 2 may be the same or different and each represents oxygen or sulphur
  • X represents hydrogen or a salt-forming radical, that is s ' ⁇ luble in the water-immiscible diluent, optionally
  • R 3 and R 4 may be the same or different and each represents a C 4 .. 12 substituted or unsubstituted alkyl group or C4_s substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted phenyl group,
  • Z 3 and Z 4 may be the same or different and each represents oxygen or sulphur
  • X represents hydrogen or a salt-forming radical, that is soluble in the water-immiscible diluent
  • R 5 , R 6 , and R 7 may be the same or different and each represents a 4_]_2 substituted or unsubstituted alkyl, alkoxy, cycloalkyl, cycloalkoxy group, or a substituted or unsubstituted phenyl group, provided that the number of carbons in R 5 ,
  • R 6 , and R 7 together total at least 18, and that is soluble in the water-immiscible diluent, and with the proviso that if component (ii) is the mono-2- ethylhexyl ester of mono-2 -ethylhexylphosphonic acid, component (iii) is bis (2, 4, 4-trimethylpentyl) phosphinic acid, and the sole component (iv) is tris (2 , 4 , 4 -trimethylpentyl) phosphine oxide, then the amount of tris (2,4,4 - trimethylpentyl) phosphine oxide is greater than 16.5%, based on the amount of bis (2, 4, 4 -trimethylpentyl) phosphinic acid; or
  • component (b) contacting the lanthanide-containing extractant solution with aqueous nitric acid to strip the lanthanide into the aqueous nitric acid, wherein the extractant solution contains the lanthanide and further comprises components (i) , l ' O (ii) , and (iii) and optionally component (iv) , with the proviso that if component (ii) is the mono-2-ethylhexyl ester of mono-2-ethylhexylphosphonic acid, and component (iii) is bis (2, 4, 4-trimethylpentyl) phosphinic acid, then tris (2,4,4- trimethylpentyl) phosphine oxide is present in an amount not greater than 13.8%, based on the amount of bis (2,4,4- trimethylpentyl) phosphinic acid, preferably not greater than about 10% and, most preferably, is absent.
  • Figure 1 is a graph showing the effect of phosphine 20 oxide concentration on the stripping of Yb with hydrochloric acid using 0.5 M of organophosphonic acid and 0.5 M of organophosphinic acid.
  • Figure 2 is a graph showing the effect of phosphine oxide concentration on the stripping of Yb with nitric acid using 0.5 M of organophosphonic acid and 0.5 M of organophosphinic acid.
  • Figure 3 is a graph showing the effect of phosphine oxide concentration on the stripping of Yb with hydrochloric acid using 0.75 M of organophosphonic acid and 0.75 M of organophosphinic acid.
  • Figure 4 is a graph showing the effect of phosphine oxide concentration on the stripping of Yb with nitric acid using 0.75 M of organophosphonic acid and 0.75 M of organophosphinic acid.
  • the Applicant Using an organophosphonic/organothiophosphonic acid, and, optionally, an organophosphinic/organothio-phosphinic acid as the extractant, the Applicant has now demonstrated that the efficiency of stripping can be improved by varying the concentration of phosphine oxide or ester of phosphorus in the extractant solution. Namely, the stripping efficiency of hydrochloric acid is increased by adding or increasing the
  • the extractant solution from which the lanthanide is to be stripped is usually a solution that has been obtained by subjecting an aqueous acid leachate of a lanthanide-containing ore to extraction with an organophosphorus-containing organic extractant .
  • the leachate is usually a very weakly acidic solution, say about pH 2 to about 5, that is contacted, co- currently or countercurrently, with the extractant, causing lanthanides to be extracted from the weakly acidic aqueous solution into the organophosphorus-containing organic extractant.
  • the relative volume of the aqueous acidic leachate containing the lanthanide to the organic extractant can vary between wide limits; it may depend, for instance, upon the particular arrangements at an extraction plant or mine. Ratios from about 20:1 to about 1:20, particularly from about 10:1 to about 1:10 are mentioned.
  • the extractant solution includes an organo- phosphonic or organothiophosphonic acid of formula:
  • R 1 and R 2 may be the same or different and each represents C - ⁇ 2 > preferably Cg_ ⁇ g, substituted or unsubstituted alkyl group or a C4. 3 , preferably C5 or C5
  • Z 1 and Z 2 may be the same or different and each represents oxygen or sulphur.
  • Z 1 is oxygen; more preferably both Z 1 and Z 2 are oxygen.
  • X is hydrogen or a salt-forming radical; preferably, X is hydrogen, an alkali metal, or ammonium ion. Mixtures of such compounds can be used.
  • organothiophosphonic acids include the mono-2 -ethylhexyl ester of mono-2 -ethylhexyl phosphonic acid; the cyclohexyl ester of 3 , 3, 5-trimethylhexylphosphonic acid; the cyclopentyl ester of 2-ethylhexylph ⁇ sphonic acid; the mono-2 -ethylhexyl ester of phenylphosphonic acid; the mono-3-methyloctyl ester of n- amylphosphonic acid; the 3,5, 5-trimethylhexyl ester of 3,3,5- trimethylhexylphosphonic acid; the monoisodecyl ester of 2- ethylhexylphosphonic acid; the monoisodecyl ester of isodecylphosphonic acid; the monoisodecyl ester of isodecylphosphonic acid and the like, and also the corresponding thio compounds.
  • the organophosphonic or organothiophosphonic acid component is suitably present in an amount of 0.1 - 1M, preferably 0.25 - 0.75M, more preferably about 0.4 - 0.6M in the solution t ⁇ be stripped.
  • the extractant solvent further, optionally, includes an organophosphinic or organothiophosphinic acid of formula:
  • R 3 and R 4 may be the same or different and each represents a 04.12, preferably CQ . IQ , substituted or
  • Z 3 and Z 4 may be the same or different and each represents oxygen or sulphur
  • X represents hydrogen or a salt-forming radical, preferably hydrogen alkali metal, or ammonium ion. Mixtures of such compounds can be used.
  • suitable organophosphinic acids include the following: di-n-butylphosphinic acid; di- isobutylphosphinic acid; di-n-pentylphosphinic acid; di-n- hexylphosphinic acid; di-heptylphosphinic acid; di-n- octylphosphinic acid; bis (2 -ethylhexyl) phosphinic acid; di-n- nonylphosphini ⁇ acid; di-n-decylphosphinic acid; di-n- dodecylphosphinic acid; bis (2 , 4, 4-trimethylpentyl) phosphinic acid; (2, 4, 4-trimethylpentyl) cyclohexylphosphinic acid; (2, 4, 4-trimethylpentyl)
  • the extractant solution may contain no phosphinic acid derivative, i.e., no component (iii). It is preferred, however, that a phosphinic acid derivative shall be present.
  • a suitable amount is from about 0. l to about 1M, preferably 0.25 - 0.75M, more preferably about 0.4 - 0.6M in the extractant solution.
  • the extractant solution may optionally contain a component (iv) , a phosphine oxide or ester of phosphorus of formula:
  • R 5 , R 6 , and R 7 may be the same or different and each represents Q - i2 > preferably Cg_i2 substituted or
  • Mixtures of phosphine oxides or phosphorus esters can be used.
  • the component (iv) is a phosphine oxide.
  • component (iv) is a phosphinate ester.
  • component (iv) is a phosphonate ester.
  • component (iv) is a phosphate ester. Any of these, or mixtures of these, can be used as component (iv) , but it is preferred that component (iv) is a phosphine oxide.
  • component (iv) Particularly preferred as component (iv) are tri-n-octylphosphine oxide (TOPO) , tris (2, 4, 4 -trimethylpentyl) phosphine oxide (TTMPP) and trihexylphosphine oxide.
  • TOPO tri-n-octylphosphine oxide
  • TTMPP tris (2, 4, 4 -trimethylpentyl) phosphine oxide
  • trihexylphosphine oxide trihexylphosphine oxide
  • the term lanthanide includes elements 57 to 71 of the Periodic Table.
  • the process of the invention is more effective with lanthanides of atomic numbers 65 to 71 inclusive, and especially with those of atomic numbers 69 to 71. These are the lanthanides that complex most strongly with the organophosphorus extractant, as stated above.
  • scandium and yttrium are often found with lanthanides and the process of the invention is effective with scandium and yttrium; in their stripping properties, these two elements are similar to the heavy lanthanides.
  • the term "lanthanide" should be understood to include scandium and yttrium unless the context requires otherwise.
  • the concentration of the lanthanide in the extractant solution may vary between wide limits, but is suitably about 0.005M to about 0.2M, preferably about 0.05M to about 0.15M.
  • the concentration of component (iv) is preferably about 0.05M to about 0.6M, more preferably about 0.1M to about 0.4M, most preferably about 0.15M to about 0.25M, and especially 0.2M.
  • Component (iv) is preferably a phosphine oxide, but it is in accordance with the invention that some or all of component (iv) is an ester of phosphorus. It has been found that the use of phosphine oxide or ester of phosphorus at these concentrations permits use of lower concentrations of hydrochloric acid for the stripping than typically used in the prior art. Consequently, the concentration of hydrochloric acid used for the stripping is preferably about 0.5 N to about 4 N, more preferably about 1 N to about 3 N, most preferably about 1.2 N to about 1.8 N.
  • component (iv) is preferably absent, or is present in an amount not exceeding about 0.1 M. This permits use of lower concentrations of nitric acid for the stripping than typically used in the prior art. Consequently, the concentration of nitric acid used for the stripping is preferably about 0.5 N to about 4 N, more preferably about 1 N to about 3 N, most preferably about 1.7 N to about 2.3 N.
  • the extractant solution contains a water-immiscible diluent, as component (i) .
  • useful diluents include halogenated and non-halogenated aliphatic and aromatic hydrocarbons such as, for example, hexane, heptane, octane, dodecane, benzene, toluene, xylenes, ethylbenzene, and the corresponding chlorinated compounds and petroleum cuts such as kerosene, fuel oil, JP-1, aliphatic hydrocarbons available under the trade-mark EXXSOL D-80, and the like.
  • Components (ii) , (iii) and (iv) are soluble in the diluent.
  • the temperature at which the lanthanide is stripped by the acid is not critical... It may range from about 10°C to
  • the ratio of acid to extractant solution can vary between wide limits and, for example, may range from 20:1 to 1:20, particularly 10:1 to 1:10.
  • the aqueous leachate from which the lanthanide is extracted into the extractant solution should be acidic, i.e. the pH should be under about 6.5, preferably from about 1 to 4. If necessary or desirable the pH can be adjusted by addition of a suitable reagent, for example aqueous sodium hydroxide or ammonia.
  • the lanthanide may be isolated by precipitation, for example, using a base to precipitate a hydroxide or carbonate, from the aqueous hydrochloric or nitric acid used to strip.
  • the lanthanide can be precipitated by addition of oxalic acid or an oxalate salt.
  • the lanthanide-containing extractant solution is obtained by extracting the lanthanide from an aqueous acidic leachate
  • a scrubbing step before the extractant solution is stripped by treatment with hydrochloric or nitric acid.
  • the scrubbing can be carried out by washing with a dilute aqueous solution of a mineral acid, for example hydrochloric, nitric, phosphoric or sulphuric acid.
  • the solution is only weakly acidic, so the lanthanide is not stripped from the organic phase into the aqueous phase during this scrubbing step.
  • the scrubbing solution may contain a lanthanide so that partition between the organic and aqueous solutions does not cause lanthanide from the organic solution to enter the aqueous scrubbing solution.
  • the extractant solution After the extractant solution has been stripped of lanthanide, it cran be recycled for re-use to extract more lanthanide from an aqueous acidic leachate from a lanthanide- containing ore. Before recycling the stripped solution, it may be desirable to wash the solution.
  • strong aqueous mineral acid for instance hydrochloric, nitric, or sulphuric acid of pH less than about l, preferably less than about 0.5 is suitable.
  • the acid used for this washing should be stronger than the acid used for stripping.
  • Example 1 The invention is further illustrated in the following non-limiting examples.
  • Example 1 The invention is further illustrated in the following non-limiting examples.
  • CYANEX 272 contains 85-87% bis (2, 4, 4-trimethylpentyl) phosphinic acid (BTPP): and 12-14% tris (2 , 4 , 4-trimethylpentyl) phosphine oxide (TTMPP) , i.e. the amount of tris (2 , 4 ,4-trimethyl-pentyl) phosphine oxide is about 13.8 to 16.5%, based on the amount of BTPP.
  • Purified CYANEX 272 contains greater than 99% bis (2, 4, -trimethylpentyl) phosphinic acid (BTPP).
  • IONQUEST 801 contains 97% mono-2 -ethylhexyl ester of mono-2 -ethylhexylphosphonic acid (MEPA) .
  • EXXSOL D-80 is composed of a mixture of C 10 -C12 hydrocarbons .
  • Sodium hydroxide 100 g/L NaOH was used for pH control.
  • the loaded extractant solution was centrifuged and the concentration of Yb loaded was determined, by Inductively Coupled Plasma (ICP) analysis, to be 0.09 to 0.1M.
  • ICP Inductively Coupled Plasma
  • BTPP an organophosphinic acid
  • MEPA an organophosphonic acid
  • phosphine oxide in concentrations of 0.08M, 0M, 0.2M and 0.4M, respectively.
  • HNO3 concentration on Yb stripping is plotted in Figure 4.
  • Use of solutions 6 and 7 with HNO 3 is not in accordance with the invention.
  • Use of solution 5 with HNO 3 is in accordance with the invention.

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Abstract

L'invention concerne l'utilisation d'un acide organophosphonique/organothiophosphonique et, éventuellement, d'un acide organophosphinique/organothiophosphinique comme agent d'extraction permettant d'améliorer l'efficacité de la désoxydation des lanthanides par variation de la concentration d'oxydes de phosphine ou d'esters de phosphore dans la solution d'extraction. A savoir, l'efficacité de la désoxydation de l'acide chlorhydrique est améliorée par addition ou augmentation de la concentration d'oxyde de phosphine ou d'ester de phosphore dans la solution d'extraction ; l'efficacité de la désoxydation de l'acide nitrique est améliorée par retrait ou diminution de la concentration d'oxyde de phosphine ou d'ester de phosphore dans la solution d'extraction.
PCT/US2000/018359 1999-07-09 2000-07-05 Desoxydation de solutions d'extraction phosphoniques/phosphiniques chargees en lanthanides en presence d'oxyde de phosphine Ceased WO2001004366A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU57864/00A AU5786400A (en) 1999-07-09 2000-07-05 Stripping lanthanide-loaded phosphonic/phosphinic extractant solutions in the presence of phosphine oxide

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CA2,277,417 1999-07-09
CA002277417A CA2277417A1 (fr) 1999-07-09 1999-07-09 Extraction de solutions chargees de lanthanides

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RU2293134C1 (ru) * 2005-05-26 2007-02-10 Институт химии и химической технологии СО РАН (ИХХТ СО РАН) Способ извлечения редкоземельных металлов и иттрия из углей и золошлаковых отходов от их сжигания
RU2441087C1 (ru) * 2010-12-30 2012-01-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ экстракции редкоземельных элементов иттрия (iii), церия (iii) и эрбия (iii) из водных растворов
RU2484163C1 (ru) * 2012-04-03 2013-06-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Способ извлечения редкоземельных металлов из водных растворов
RU2513327C1 (ru) * 2013-04-09 2014-04-20 Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) Способ переработки лопаритового концентрата
RU2530081C1 (ru) * 2013-03-06 2014-10-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет" (ФГБОУ ВПО "ВГУ") Способ извлечения церия
RU2542202C1 (ru) * 2013-11-27 2015-02-20 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "ЮЖНЫЙ ФЕДЕРАЛЬНЫЙ УНИВЕРСИТЕТ" Способ извлечения элементов-примесей из минерального сырья
RU2548836C1 (ru) * 2013-12-17 2015-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" Способ извлечения катионов самария (iii) из водных фаз
US9023301B2 (en) 2012-01-10 2015-05-05 Orbite Aluminae Inc. Processes for treating red mud
US9150428B2 (en) 2011-06-03 2015-10-06 Orbite Aluminae Inc. Methods for separating iron ions from aluminum ions
US9181603B2 (en) 2012-03-29 2015-11-10 Orbite Technologies Inc. Processes for treating fly ashes
US9260767B2 (en) 2011-03-18 2016-02-16 Orbite Technologies Inc. Processes for recovering rare earth elements from aluminum-bearing materials
US9290828B2 (en) 2012-07-12 2016-03-22 Orbite Technologies Inc. Processes for preparing titanium oxide and various other products
RU2584626C1 (ru) * 2014-12-22 2016-05-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" Способ извлечения гольмия (iii) из растворов солей
US9353425B2 (en) 2012-09-26 2016-05-31 Orbite Technologies Inc. Processes for preparing alumina and magnesium chloride by HCl leaching of various materials
US9382600B2 (en) 2011-09-16 2016-07-05 Orbite Technologies Inc. Processes for preparing alumina and various other products
US9410227B2 (en) 2011-05-04 2016-08-09 Orbite Technologies Inc. Processes for recovering rare earth elements from various ores
RU2598415C2 (ru) * 2011-06-27 2016-09-27 Син-Эцу Кемикал Ко., Лтд. Способ экстракции и выделения легкого редкоземельного элемента
US9534274B2 (en) 2012-11-14 2017-01-03 Orbite Technologies Inc. Methods for purifying aluminium ions
RU2624269C1 (ru) * 2016-09-06 2017-07-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский горный университет" Способ извлечения эрбия (iii) экстракцией
EP3505645A4 (fr) * 2016-08-24 2020-04-29 Kyushu University, National University Corporation Procédé de purification du scandium et agent d'extraction de scandium
CN114350948A (zh) * 2022-01-17 2022-04-15 中南大学 α-羟基-2-乙基己基次膦酸萃取剂及其制备方法与应用

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RU2293134C1 (ru) * 2005-05-26 2007-02-10 Институт химии и химической технологии СО РАН (ИХХТ СО РАН) Способ извлечения редкоземельных металлов и иттрия из углей и золошлаковых отходов от их сжигания
RU2441087C1 (ru) * 2010-12-30 2012-01-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ экстракции редкоземельных элементов иттрия (iii), церия (iii) и эрбия (iii) из водных растворов
US9945009B2 (en) 2011-03-18 2018-04-17 Orbite Technologies Inc. Processes for recovering rare earth elements from aluminum-bearing materials
US9260767B2 (en) 2011-03-18 2016-02-16 Orbite Technologies Inc. Processes for recovering rare earth elements from aluminum-bearing materials
US9410227B2 (en) 2011-05-04 2016-08-09 Orbite Technologies Inc. Processes for recovering rare earth elements from various ores
US9150428B2 (en) 2011-06-03 2015-10-06 Orbite Aluminae Inc. Methods for separating iron ions from aluminum ions
RU2598415C2 (ru) * 2011-06-27 2016-09-27 Син-Эцу Кемикал Ко., Лтд. Способ экстракции и выделения легкого редкоземельного элемента
US10174402B2 (en) 2011-09-16 2019-01-08 Orbite Technologies Inc. Processes for preparing alumina and various other products
US9382600B2 (en) 2011-09-16 2016-07-05 Orbite Technologies Inc. Processes for preparing alumina and various other products
US9023301B2 (en) 2012-01-10 2015-05-05 Orbite Aluminae Inc. Processes for treating red mud
US9556500B2 (en) 2012-01-10 2017-01-31 Orbite Technologies Inc. Processes for treating red mud
US9181603B2 (en) 2012-03-29 2015-11-10 Orbite Technologies Inc. Processes for treating fly ashes
RU2484163C1 (ru) * 2012-04-03 2013-06-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" Способ извлечения редкоземельных металлов из водных растворов
US9290828B2 (en) 2012-07-12 2016-03-22 Orbite Technologies Inc. Processes for preparing titanium oxide and various other products
US9353425B2 (en) 2012-09-26 2016-05-31 Orbite Technologies Inc. Processes for preparing alumina and magnesium chloride by HCl leaching of various materials
US9534274B2 (en) 2012-11-14 2017-01-03 Orbite Technologies Inc. Methods for purifying aluminium ions
RU2530081C1 (ru) * 2013-03-06 2014-10-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет" (ФГБОУ ВПО "ВГУ") Способ извлечения церия
RU2513327C1 (ru) * 2013-04-09 2014-04-20 Федеральное государственное бюджетное учреждение науки Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН) Способ переработки лопаритового концентрата
RU2542202C1 (ru) * 2013-11-27 2015-02-20 Федеральное государственное автономное образовательное учреждение высшего профессионального образования "ЮЖНЫЙ ФЕДЕРАЛЬНЫЙ УНИВЕРСИТЕТ" Способ извлечения элементов-примесей из минерального сырья
RU2548836C1 (ru) * 2013-12-17 2015-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" Способ извлечения катионов самария (iii) из водных фаз
RU2584626C1 (ru) * 2014-12-22 2016-05-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный минерально-сырьевой университет "Горный" Способ извлечения гольмия (iii) из растворов солей
EP3505645A4 (fr) * 2016-08-24 2020-04-29 Kyushu University, National University Corporation Procédé de purification du scandium et agent d'extraction de scandium
RU2624269C1 (ru) * 2016-09-06 2017-07-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский горный университет" Способ извлечения эрбия (iii) экстракцией
CN114350948A (zh) * 2022-01-17 2022-04-15 中南大学 α-羟基-2-乙基己基次膦酸萃取剂及其制备方法与应用

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