CN114990363A - Method for extracting rare earth element europium - Google Patents
Method for extracting rare earth element europium Download PDFInfo
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- CN114990363A CN114990363A CN202210671663.0A CN202210671663A CN114990363A CN 114990363 A CN114990363 A CN 114990363A CN 202210671663 A CN202210671663 A CN 202210671663A CN 114990363 A CN114990363 A CN 114990363A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 26
- 229910052693 Europium Inorganic materials 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000002608 ionic liquid Substances 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 18
- -1 europium ions Chemical class 0.000 claims abstract description 16
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000003085 diluting agent Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000005191 phase separation Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000012074 organic phase Substances 0.000 claims abstract description 6
- CJQQXUHOWONEDF-UHFFFAOYSA-N [Gd].[Eu].[Sm] Chemical compound [Gd].[Eu].[Sm] CJQQXUHOWONEDF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 12
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012071 phase Substances 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- XTAZYLNFDRKIHJ-UHFFFAOYSA-N n,n-dioctyloctan-1-amine Chemical compound CCCCCCCCN(CCCCCCCC)CCCCCCCC XTAZYLNFDRKIHJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 2
- 150000008064 anhydrides Chemical class 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- ZANNOFHADGWOLI-UHFFFAOYSA-N ethyl 2-hydroxyacetate Chemical compound CCOC(=O)CO ZANNOFHADGWOLI-UHFFFAOYSA-N 0.000 claims description 2
- PQJJJMRNHATNKG-UHFFFAOYSA-N ethyl bromoacetate Chemical compound CCOC(=O)CBr PQJJJMRNHATNKG-UHFFFAOYSA-N 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000013067 intermediate product Substances 0.000 claims description 2
- PXSXRABJBXYMFT-UHFFFAOYSA-N n-hexylhexan-1-amine Chemical compound CCCCCCNCCCCCC PXSXRABJBXYMFT-UHFFFAOYSA-N 0.000 claims description 2
- 239000012044 organic layer Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000007865 diluting Methods 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/04—Formation of amino groups in compounds containing carboxyl groups
- C07C227/06—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid
- C07C227/08—Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid by reaction of ammonia or amines with acids containing functional groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/16—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions not involving the amino or carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/12—Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
-
- 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
-
- 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
The invention discloses a method for extracting rare earth element europium, which comprises the following steps: (1) adding nitric acid into a samarium-europium-gadolinium enriched material aqueous solution serving as a feed liquid to adjust the pH value of the solution, and then adding the solution into a conical separating funnel; (2) taking the functional ionic liquid diluted by the diluent as an extracting agent, adding the extracting agent into the feed liquid with the adjusted pH value, and oscillating the conical separating funnel on an electric oscillator for 5 minutes; the ionic liquid is trioctyl (2-ethoxy-2-oxoethyl) dihexyl diethanolammonium [ OcGBOET ] [ DHDGA ]; (3) standing for phase separation, mixing the loaded organic phase with a nitric acid solution and stirring after phase separation, and performing back extraction on europium ions. The method for extracting the rare earth element europium with the structure has high extraction rate, and can effectively shorten the extraction separation series and reduce the volume of a mixing chamber in industrial production.
Description
Technical Field
The invention relates to the technical field of rare earth hydrometallurgy, in particular to a method for extracting rare earth element europium.
Background
At present, the rare earth element europium is mainly used in the field of luminescent materials or combined with luminescent materials. A process for preparing europium from enriched samarium, europium and gadolinium at home and abroad mainly comprises an extraction method and a zinc powder reduction method. Compared with the zinc powder reduction method, the solvent extraction method has the advantages of wide operation scale, relatively simple equipment design and the like. However, the conventional separation techniques mainly based on solvent extraction have problems of low separation efficiency, poor stability of separation materials, limited selectivity, generation of a large amount of waste materials, and the like. In addition to safety and environmental concerns, evaporation of traditional organic solvents and extractants can lead to increased consumption, cost, and health concerns.
Disclosure of Invention
The invention aims to provide a method for extracting rare earth element europium, which has high extraction rate and can effectively shorten the extraction separation series and reduce the volume of a mixing chamber in industrial production.
In order to achieve the purpose, the invention provides a method for extracting rare earth element europium, which comprises the following steps:
(1) adding nitric acid into a samarium europium gadolinium enriched material aqueous solution serving as a feed liquid to adjust the pH value of the solution, and then adding the solution into a conical separating funnel;
(2) using the functional ionic liquid diluted by the diluent as an extractant, adding the extractant into the feed liquid with the adjusted pH value, and oscillating the conical separating funnel on an electric oscillator for 5 minutes; the ionic liquid is trioctyl (2-ethoxy-2-oxoethyl) dihexyl diethanolammonium [ OcGBOET ] [ DHDGA ];
(3) standing for phase separation, mixing the loaded organic phase with a nitric acid solution and stirring after phase separation, and performing back extraction on europium ions.
Preferably, the feed liquid in the step (1) is a rare earth nitrate solution, and the concentration of the rare earth nitrate solution is 0.0005-0.01 mol L-1.
Preferably, the pH value of the feed liquid in the step (1) is adjusted to 2-6, and further, the pH value of the feed liquid is 4.
Preference is given toIn the step (2), the concentration of the ionic liquid is 0.005-0.1 mol L -1 Further, the ionic liquid concentration was 0.04mol L -1 。
Preferably, the diluent in step (2) is one or more of hexane, toluene and chloroform, and further, the diluent is chloroform.
Preferably, the extraction phase in step (2) is 0.5 to 2 in terms of O/a, and further 1 in terms of O/a.
A synthetic method of ionic liquid in a method for extracting rare earth element europium comprises the following steps:
(a) preparation of dihexyldiglycolic acid [ DHDGAA ]
Adding dihexylamine dissolved in dichloromethane dropwise into diethanol anhydride dispersed in dichloromethane in ice bath, removing ice bath, continuing reaction at room temperature for 20 hours, washing the obtained solution with deionized water four times, separating out organic layer, drying with anhydrous sodium sulfate, evaporating solvent in vacuum, and recrystallizing the residue from hexane to obtain white powder;
(b) preparation of trioctyl [ 2-ethoxy-2-oxoethyl ] hydroxide [ OcgBOEt ] [ OH ]
Dissolving trioctylamine in ethyl acetate, then dropwise adding the trioctylamine into ethyl bromoacetate in an ice bath, stirring the mixture at room temperature for 24 hours, then evaporating the solution under vacuum to obtain transparent green trioctyl (2-ethoxy-2-oxyethyl) ammonium bromide [ OcGBOET ] [ Br ], dissolving [ OcGBOET ] [ Br ] in ethanol, then reacting with potassium hydroxide dissolved in the ethanol, stirring the mixture for 24 hours, then carrying out solid-liquid separation through centrifugation, and then evaporating the ethanol under vacuum to synthesize [ OcGBOET ] [ OH ] as an intermediate product;
(c) preparation of ammonium trioctyl [ 2-ethoxy-2-oxoethyl ] dihexyldiethanolate [ OcGBOET ] [ DHDGA ]
[ OcGBOET ] [ OH ] and DHDGAA were dissolved in dichloromethane at a molar ratio of 1:1 and refluxed for 18 hours, then the solvent was removed under vacuum and the final product was completely dried using a vacuum oven at 70 ℃ for about 7-8 hours to give [ OcGBOET ] [ DHDGA ].
The invention has the beneficial effects that:
(1) realizes the high-efficiency extraction and back extraction of the rare earth element europium ions.
(2) The ionic liquid extractant used is a good replacement for the toxic, flammable, water-miscible volatile organic solvents.
(3) The ionic liquid trioctyl (2-ethoxy-2-oxoethyl) dihexyldiethanolammonium tartrate [ OcGBOET ] [ DHDGA ] cation and anion used in the invention can be combined with 3-valent rare earth ion
(REE 3+ ) Forming coordination bonds, improving the extraction capacity of an ionic liquid system and reducing the loss of dissolved ionic liquid in a water phase.
(4) The extraction rate is as high as 98.5%, and the extraction separation series and the volume of the mixing chamber can be effectively shortened in the industrial production.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a block diagram of an ionic liquid of the present invention;
FIG. 2 is a schematic diagram of the synthesis of an ionic liquid of the present invention.
Detailed Description
The present invention will be further described with reference to examples, in which various chemicals and reagents are commercially available unless otherwise specified.
Example 1
0.001mol L was used -1 Adding nitric acid to adjust pH to 4, adding into conical separating funnel, diluting with chloroform to 0.04mol L -1 The extracting agent is added into the feed liquid with the adjusted pH value, and the phase ratio is set to be 1. Oscillating for 5 minutes in a conical separating funnel at normal temperature, standing for phase splitting, and mixing and stirring a loaded organic phase by using a nitric acid solution to strip europium ions. Eu (Eu) 3+ The extraction rate is 98.5 percent
Example 2
0.001mol L was used -1 Rare earth nitrate solution is taken as feed liquid, nitric acid is added to adjust the pH value of the feed liquid to be 4, then the feed liquid is added into a conical separating funnel, toluene is used as a diluent,diluting the ionic liquid concentration to 0.04mol L -1 The extracting agent is added into the feed liquid with the adjusted pH value, and the phase ratio is set to be 1. Oscillating for 5 minutes in a cone separating funnel at normal temperature, standing for phase separation, and mixing and stirring a loaded organic phase by using a nitric acid solution to strip europium ions. Eu (Eu) 3+ The extraction rate is 92.2 percent
Example 3
Use of 0.005mol L -1 Feeding a rare earth nitrate solution, adding nitric acid to adjust the pH value of the feed liquid to 4, adding the feed liquid into a conical separating funnel, and diluting the ionic liquid to 0.04mol L by using chloroform as a diluent -1 The extracting agent is added into the feed liquid with the adjusted pH value, and the phase ratio is set to be 1. Oscillating for 5 minutes in a cone-shaped separating funnel at normal temperature, standing for phase splitting, and mixing and stirring a loaded organic phase by using a nitric acid solution to back extract europium ions. Eu (Eu) 3+ The extraction rate is 96.4 percent
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (7)
1. A method for extracting rare earth element europium is characterized by comprising the following steps:
(1) adding nitric acid into a samarium-europium-gadolinium enriched material aqueous solution serving as a feed liquid to adjust the pH value of the solution, and then adding the solution into a conical separating funnel;
(2) taking the functional ionic liquid diluted by the diluent as an extracting agent, adding the extracting agent into the feed liquid with the adjusted pH value, and oscillating the conical separating funnel on an electric oscillator for 5 minutes; the ionic liquid is trioctyl (2-ethoxy-2-oxoethyl) dihexyl diethanolammonium [ OcGBOET ] [ DHDGA ];
(3) standing for phase separation, mixing the loaded organic phase with a nitric acid solution and stirring after phase separation, and performing back extraction on europium ions.
2. The method of claim 1, wherein the rare earth element europium is extracted by the following steps: the feed liquid in the step (1) is a rare earth nitrate solution, and the concentration of the rare earth nitrate solution is 0.0005-0.01 mol L -1 。
3. The method of claim 1, wherein the rare earth element is europium: the pH value of the feed liquid in the step (1) is adjusted to 2-6.
4. The method of claim 1, wherein the rare earth element is europium: the concentration of the ionic liquid in the step (2) is 0.005-0.1 mol L -1 。
5. The method of claim 1, wherein the rare earth element europium is extracted by the following steps: in the step (2), the diluent is one or more of hexane, toluene and chloroform.
6. The method of claim 1, wherein the rare earth element europium is extracted by the following steps: the extraction phase ratio in the step (2) is 0.5-2.
7. A method for synthesizing an ionic liquid in a method for extracting a rare earth element europium as claimed in any one of claims 1 to 6, comprising the steps of:
(a) preparation of dihexyldiglycolic acid [ DHDGAA ]
Adding dihexylamine dissolved in dichloromethane dropwise into diethanol anhydride dispersed in dichloromethane in ice bath, removing ice bath, continuing reaction at room temperature for 20 hours, washing the obtained solution with deionized water four times, separating out organic layer, drying with anhydrous sodium sulfate, evaporating solvent in vacuum, and recrystallizing the residue from hexane to obtain white powder;
(b) preparation of trioctyl [ 2-ethoxy-2-oxoethyl ] hydroxide [ OcgBOEt ] [ OH ]
Dissolving trioctylamine in ethyl acetate, then dropwise adding the trioctylamine into ethyl bromoacetate in an ice bath, stirring the mixture at room temperature for 24 hours, then evaporating the solution under vacuum to obtain transparent green trioctyl (2-ethoxy-2-oxyethyl) ammonium bromide [ OcGBOET ] [ Br ], dissolving [ OcGBOET ] [ Br ] in ethanol, then reacting with potassium hydroxide dissolved in the ethanol, stirring the mixture for 24 hours, then carrying out solid-liquid separation through centrifugation, and then evaporating the ethanol under vacuum to synthesize [ OcGBOET ] [ OH ] as an intermediate product;
(c) preparation of ammonium trioctyl [ 2-ethoxy-2-oxoethyl ] dihexyldiethanolate [ OcGBOET ] [ DHDGA ]
[ OCGBOET ] [ OH ] and DHDGAA were dissolved in dichloromethane at a molar ratio of 1:1 and refluxed for 18 hours, then the solvent was removed under vacuum and the final product was completely dried using a vacuum oven at 70 ℃ for about 7-8 hours to give [ OCGBOET ] [ DHDGA ].
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| CN202210671663.0A CN114990363A (en) | 2022-06-14 | 2022-06-14 | Method for extracting rare earth element europium |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100003176A1 (en) * | 2007-02-08 | 2010-01-07 | Xiaowei Huang | Process for pretreating organic extractants and its product and application |
| CN102618736A (en) * | 2012-03-31 | 2012-08-01 | 中国科学院长春应用化学研究所 | Extraction seperation method of rare-earth element |
| US20210070628A1 (en) * | 2017-10-19 | 2021-03-11 | Sck Cen (Studiecentrum Voor Kernenergie / Centre D'etude De L'energie Nucleaire | Removal of europium impurities from samarium-153 in nitrate media using ionic liquids |
-
2022
- 2022-06-14 CN CN202210671663.0A patent/CN114990363A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100003176A1 (en) * | 2007-02-08 | 2010-01-07 | Xiaowei Huang | Process for pretreating organic extractants and its product and application |
| CN102618736A (en) * | 2012-03-31 | 2012-08-01 | 中国科学院长春应用化学研究所 | Extraction seperation method of rare-earth element |
| US20210070628A1 (en) * | 2017-10-19 | 2021-03-11 | Sck Cen (Studiecentrum Voor Kernenergie / Centre D'etude De L'energie Nucleaire | Removal of europium impurities from samarium-153 in nitrate media using ionic liquids |
Non-Patent Citations (2)
| Title |
|---|
| MOSTAFA KHODAKARAMI等: "Separation and recovery of rare earth elements using novel ammoniumbased task-specific ionic liquids with bidentate and tridentate O-donor functional groups", SEPARATION AND PURIFICATION TECHNOLOGY, pages 2 * |
| 何捍卫;孟佳;: "采用P507(HEH/EHP)从废FCC催化剂中回收稀土", 中南大学学报(自然科学版), no. 09 * |
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Application publication date: 20220902 |