WO2015040045A1 - Procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares - Google Patents

Procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares Download PDF

Info

Publication number
WO2015040045A1
WO2015040045A1 PCT/EP2014/069769 EP2014069769W WO2015040045A1 WO 2015040045 A1 WO2015040045 A1 WO 2015040045A1 EP 2014069769 W EP2014069769 W EP 2014069769W WO 2015040045 A1 WO2015040045 A1 WO 2015040045A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier medium
transport direction
additive
medium
rare earths
Prior art date
Application number
PCT/EP2014/069769
Other languages
German (de)
English (en)
Inventor
Siegfried Egner
Alexander Karos
Maximilian Kotzur
Lea KOENIG
Original Assignee
Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V:
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V: filed Critical Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V:
Publication of WO2015040045A1 publication Critical patent/WO2015040045A1/fr

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D57/00—Separation, other than separation of solids, not fully covered by a single other group or subclass, e.g. B03C
    • B01D57/02—Separation, other than separation of solids, not fully covered by a single other group or subclass, e.g. B03C by electrophoresis
    • 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
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • 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 invention relates to a method for the extraction and / or separation and / or purification of rare earths, as well as a device for carrying out the method.
  • the term "rare earths” is used for one or more of the 17 elements from the third subgroup of the Periodic Table of the Elements.
  • the word compounds "rare earth metals” and “rare earth elements” are common in German linguistic usage.
  • Rare earths are very similar due to the electron configuration and a separation of the individual elements is therefore difficult.
  • a mixture of dissolved rare earths is present in a solution.
  • Complex mixtures are separated by classical methods such as fractional crystallization and fractional precipitation as well as by modern techniques such as ion exchange chromatography and solvent extraction.
  • a separation of individual rare earths is carried out according to the prior art mostly multi-stage and very expensive. As a result of comparatively many treatment steps, the extraction of rare earths is comparatively labor-intensive, energy-intensive and cost-intensive, and often requires the use of additional chemicals.
  • the invention relates to a process for the extraction and / or separation and / or purification of rare earths.
  • the method can be used in analytics but also in the industrial production of rare earths.
  • the term "starting sample” used below does not limit the invention to analytics.
  • a carrier-free continuous electrophoresis is applied to a rare-earth starting sample, the starting sample being introduced into a carrier medium flowing in a transport direction for this purpose, and an electric field being formed across the transport direction by an electric field formed by the starting sample and the carrier medium liquid medium is guided, and wherein after flowing through a transport path defined in the transport direction, at least one rare earth is collected by a rare earth enriched partial stream of the medium is withdrawn at an outlet.
  • the method according to the invention makes it possible to separate (separate) rare earths in an electric field.
  • the effect is exploited that the different rare earths in the electric field have a different movement behavior and therefore accumulate the different rare earths in different partial streams of the medium. If such a partial stream is withdrawn at an appropriate point through an outlet or the like, then there is only a rare earth in this high purity sub-stream.
  • the purity is at least 50%, but it could also
  • Purity of at least 60% or 70 can be achieved.
  • carrier-free, continuous electrophoresis has, inter alia, the advantage that several rare-earth metals are simultaneously obtained or separated from a homogeneous mixture ("starting sample") which contains the rare earths in a generally ionized state. can be cleaned.
  • the device for carrying out the carrier-free, continuous electrophoresis is hereinafter also referred to simply as "chamber".
  • an electric field is generated in a transverse direction to a continuous flow or current of the carrier medium into which the rare-earth ions to be separated are introduced.
  • the ions are deflected differently from the natural flow direction and can be collected separately by drawing off different partial flows through differently arranged outlets.
  • liquid medium a mixture of the carrier medium and the rare earths introduced therein, and possibly additionally introduced additives, also referred to as "liquid medium”.
  • the inventive effect of the method is that, depending on the chemical and / or physical properties of the different rare earths, the individual of the ions present in an aqueous solution by a homogeneous electric field in each case different from one by a geometry of the chamber and be deflected a flow of fluid conditional flow direction.
  • An already mentioned advantage of the method according to the invention is that different rare earths can be separated from one another at the same time and collected individually. In this case, a continuous operation of the method is possible, whereby the total required for the process steps can be significantly minimized.
  • the actual fractionation is effected by the applied electric field.
  • An electrochemical and / or electrophysical treatment of the starting sample has the advantage that after completion of the fractionation no additional chemicals, in particular any additives introduced, remain in the liquid medium. Thus, essentially no further so-called purification steps and / or separation steps are required to remove the added chemicals.
  • the inventive method for continuous, carrier-free electrophoresis of rare earths can be carried out by means of a plurality of alternative and / or complementary embodiments, which in each case allow the recovery and / or separation and / or purification of the rare earths according to the invention.
  • the recovery and / or separation and / or purification of rare earths according to the invention by means of carrier-free, continuous electrophoresis can be carried out both for analytical purposes with comparatively small amounts, as well as for industrial production with comparatively large amounts. It can be applied to the recovery and / or separation and / or purification of rare earths using mixtures of 1 to 17 rare earths.
  • impurities of rare earth ions can be removed.
  • one or more rare earths can be separated from impurities.
  • an aqueous or non-aqueous medium can be used as the starting sample.
  • the carrier medium is preferably made of conductive pH stabilizing components which aid in the separation. These are usually an aqueous solution, but may also be a non-aqueous solution.
  • the method is carried out by means of a zone electrophoresis or isotachophoresis.
  • a separation essentially takes place as a function of a charge density
  • isotachophoresis a separation takes place essentially as a function of an electrophoretic mobility (mobility).
  • the starting sample is introduced into the carrier medium laterally or approximately centrally with respect to a width of the carrier medium defined transversely to the transport direction.
  • the effect of the process can be further improved if at least one additive is introduced into the carrier medium.
  • the additives may include pH-stabilizing substances of organic and inorganic type, acids and bases, conductivity-influencing salts and solutions but also complex-forming and / or complex-destroying substances, as will be explained in more detail below. This can improve the selectivity of the process and save costs.
  • the at least one additive is a complexing agent.
  • the recovery and / or separation and / or purification of the rare earths according to the invention can be improved.
  • the at least one complexing agent is an ⁇ -isobutylbutyric acid, an ethylenediaminetetraacetic acid, EDTA, a nitrilotriacetic acid, NTA, an acetate, a humic acid and / or an organic acid.
  • the at least one complexing agent is an ⁇ -isobutylbutyric acid, an ethylenediaminetetraacetic acid, EDTA, a nitrilotriacetic acid, NTA, an acetate, a humic acid and / or an organic acid.
  • the at least one additive is a complex destroyer. This allows further advantageous method steps, whereby the result can be improved.
  • the at least one additive is introduced in different concentrations with respect to the width of the stream of the carrier medium.
  • this can advantageously exploit the optionally different complexing constants of the cations contained in the liquid medium for the separation of the rare earths.
  • the method can be carried out more flexibly if the different concentrations of the additives are generated in a stepped manner, wherein different concentrations and / or different amounts of the additive are distributed through widthwise distributed inlets for the carrier medium and / or by means of widthwise arranged additional inlets for which at least one additive is introduced into the carrier medium.
  • the result can be additionally improved and / or accelerated.
  • the different concentrations are generated continuously, whereby a migration of the at least one additive in the electric field is utilized. This results in a gradient of the concentration in the width of the liquid medium or of the carrier medium defined transversely to the transport direction.
  • At least one partial stream of the carrier medium and / or of the at least one additive is withdrawn at at least one outlet.
  • the withdrawn carrier medium and / or the withdrawn at least one additive is introduced by means of transversely distributed to the transport direction of inlets for the carrier medium and / or distributed transversely to the transport direction arranged additional inlets for the at least one additive again in the carrier medium.
  • the fractions consisting predominantly or exclusively of constituents of the carrier medium - in particular those which are not ionized - can thus be collected and used again for the process.
  • the amount of optionally additionally used for the process chemicals that can be added in particular the carrier medium can be reduced. This makes the process particularly environmentally friendly and economical.
  • the starting sample comprises an aqueous or a nonaqueous medium.
  • the inventive method is advantageously applicable to both options.
  • the result of the process can be further improved if the starting sample is thoroughly mixed prior to introduction into the carrier medium and / or if the carrier medium is thoroughly mixed before introduction and / or if an additive is mixed before being introduced into the carrier medium.
  • a homogeneity of the respective solution is improved and thus the selectivity of the process can be increased, whereby the process can be improved and costs can be saved.
  • the invention comprises an apparatus for carrying out the method described above.
  • the device is designed to recover and / or separate and / or purify rare earths.
  • the device is further adapted to apply a carrier-free continuous electrophoresis on a starting sample with at least one rare earth, and is further adapted to introduce the starting sample in a carrier medium flowing in a transport direction, and is further formed to be substantially transversely to the Transport direction to pass an electric field through a formed by the original sample and the carrier medium liquid medium.
  • the device according to the invention is designed to collect at least one rare earth by means of at least one outlet after flowing through a transport path defined in the transport direction.
  • At least a portion of the device in which the electric field is passed through the liquid medium comprises at least one ion-selective membrane. This can improve the effectiveness of the process.
  • gas bubbles can be avoided in sections of the device which are important for the separation of the rare earths, as a result of which the separation can proceed undisturbed and thus the selectivity of the method is improved.
  • the device comprises at least one pair of electric field-generating electrodes, and that it has a vent for at least one space portion surrounding an electrode.
  • the device comprises at least one pair of electric field-generating electrodes, and that it has a vent for at least one space portion surrounding an electrode.
  • the device may additionally be designed to introduce at least one additive in different concentrations with respect to the width defined transversely to the transport direction. This can increase the selectivity of the separation.
  • the effect of the invention can be improved if the device is designed to generate the electric field with different electric field strengths in the transport direction. This can in particular cause an increase in the selectivity.
  • An amount of the rare earths to be separated can be increased if the device comprises a plurality of individual devices for carrying out the method, which are arranged functionally parallel. As a result, a throughput of the device can be increased and costs can be saved.
  • the device comprises a plurality of individual devices for performing the method, which are arranged functionally cascaded, wherein each of the individual devices collects a specific rare earth.
  • Figure 1 is a simplified schematic of an apparatus for performing rare earth electrophoresis in a plan view
  • Figure 2 is a section through the device of Figure 1 along a line II-II;
  • Figure 3 is a first scheme for a method of separating rare earths using zone electrophoresis
  • Figure 4 is a second scheme for the rare earth separation method using zone electrophoresis
  • FIG. 5 shows a third scheme for the method for the separation of rare earths using additives
  • Figure 6 is a fourth scheme for the rare earth separation method using isotachophoresis
  • Figure 7 is a fifth scheme for the rare earth separation method using isotachophoresis.
  • FIG. 8 shows a flow chart for carrying out the method for separating the rare earths.
  • FIG. 1 shows in plan view a simplified schematic of a device 10 for carrying out a carrier-free, continuous electrophoresis for the recovery and / or separation and / or purification of rare earths 32 (see FIG. 3).
  • Figure 2 is a sectional view taken along the line II-II in Figure 1.
  • the apparatus 10 is sometimes referred to hereinafter as a "chamber".
  • two electrodes 14 and 16 are arranged horizontally in the drawing.
  • the electrodes 14 and 16 are disposed on the left and right in an edge portion of the two plates 12a and 12b in the drawing, and extend from top to bottom, respectively, over a substantial part of a length of the plates 12a and 12b.
  • a carrier medium 20 can be introduced through the inlets 18 into a space which is essentially defined by the plates 12a and 12b and by the electrodes 14 and 16.
  • a plurality of circular outlets 22 are arranged in the "lower" plate 12b.
  • the outlets 22 each have a comparatively small diameter and are presently arranged in two horizontal rows in the drawing in a gap to each other.
  • the outlets 22 have at least approximately a diameter of capillary tubes.
  • a vertical large arrow in the middle of Figure 1 indicates from top to bottom a transport direction 24 of a liquid medium 26 in the device 10.
  • a presently circular sample inlet 28 is arranged in a right upper portion of the plate 12a in the drawing.
  • the sample inlet 28, which has a comparatively small diameter, is arranged approximately laterally in a width 29, defined transversely to the transport direction 24, of the stream of the (carrier) medium, in this case somewhat below the right-hand inlet 18 in the drawing Width 29 is indicated in FIG. 1 by a horizontal double arrow between the electrodes 14 and 16.
  • peripheral sealing elements on edge regions of the plates 12a and 12b for preventing an unwanted outflow of the involved media are not shown in the diagram of FIG.
  • the carrier medium 20 is introduced continuously between the plates 12a and 12b through the inlets 18 ("continuously").
  • a starting sample 30 of the rare earths 32 is continuously introduced into the carrier medium 20 through the sample inlet 28.
  • the starting sample 30 herein comprises an aqueous medium.
  • the starting sample 30 may comprise a nonaqueous medium.
  • the carrier medium 20 in the present case comprises conductive pH-stabilizing components, which support a separation of the rare earths 32 contained in the output sample 30.
  • the pH-stabilizing components herein are an aqueous solution, but may alternatively be a non-aqueous solution.
  • An entirety of the introduced into the device 10 by means of the inlets 18 and the sample inlet 28 substances is referred to herein as the liquid medium 26.
  • a hydraulic pressure is built up in an upper area in FIG. This results in a - relatively slower - transport of the liquid medium 26 in the transport direction 24th
  • an electrical voltage is applied to separate the rare earths 32 introduced into the carrier medium 20 by means of the output sample 30, whereby an electric field 31 is generated.
  • an electric field 31 is generated.
  • a separation of the rare earth 32 for example, due to a different charge density and / or due to a different electrophoretic mobility. This will be shown in the following figures 3 to 7 among others.
  • the outlets 22 the components separated according to the method, that is to say in particular the rare earths 32, can be collected separately from one another.
  • At least one section of the device 10, in which the electric field 31 is passed through the liquid medium 26, comprises at least one ion-selective membrane.
  • the device 10 has a vent for at least one space section surrounding the electrode 14 and / or the electrode 16.
  • this device is designed to generate the electric field 31 with electric field strengths of different magnitude in the transport direction 24.
  • this comprises a plurality of individual devices 10 ', which are arranged functionally parallel.
  • this comprises a plurality of individual devices 10 ', which are arranged functionally cascaded, wherein each of the individual devices 10' can collect at least one specific rare earth 32.
  • FIG. 3 schematically shows a first embodiment of a method for separating the rare earths 32 using so-called zone electrophoresis. Because of the better clarity, the electrodes 14 and 16 and the transport direction 24 characterizing arrow are not shown below. In Figs. 3 to 7, the symbol “-" indicates the negative electrode 14 (cathode) and the symbol “+” indicates the positive electrode 16 (anode).
  • Differently structured lines between the sample inlet 28 and in each case some of the outlets 22 characterize specific flow paths of different substances, in particular of the different rare earths 32, whereby they can be separated according to the method by means of the outlets 22.
  • the starting sample 30 to be separated is introduced continuously into the carrier medium 20 which continuously flows in the transport direction 24.
  • the sample inlet 28 is arranged comparatively close behind the inlets 18 for the carrier medium 20 in the transport direction 24.
  • the introduction of the starting sample 30 (that is, the mixture of the rare earths 32) takes place, as in FIG. 1, laterally with respect to the width 29 of the carrier medium 20 or the liquid medium 26, which is defined transversely to the transport direction 24.
  • the mixture of rare earth Ions are deflected by means of the transverse to the transport direction 24 applied electric field 31 of a "natural" flow direction.
  • the properties of the cations are the cause.
  • the thus enabled separation of the rare earths 32 is supported by the carrier medium 20.
  • the various rare earths 32 (“elements") are fractionally collected via the plurality of outlets 22 at an end of the chamber defined with respect to the transport direction 24.
  • FIG. 4 shows schematically another embodiment of the rare earth separation method 32.
  • the sample inlet 28 is centrally located with respect to the width 29, again slightly below the six inlets in the drawing 18.
  • the specific flow profiles for the individual rare earths 32 are therefore slightly different in FIG. 4 than in FIG. 3.
  • FIG. 5 schematically shows a further embodiment of the method for the separation of rare earths 32.
  • this is done using at least one additive 34, which in the present case is a so-called complexing agent.
  • the naturally very similar properties of the rare earths 32 are advantageously changed by introducing one or more of the complexing agents.
  • the complexation of a rare earth 32 is dependent on a complexing constant with a respective additive 34.
  • the complexation constant determines at which concentration of a respective additive 34 a compound is entered.
  • a gradient 36 of the concentration of the complexing agent defined transversely to the transport direction 24 can be formed, for example, by means of entry via the (discrete) inlets 18 for the carrier medium 20 as a so-called step gradient. As a result, the concentration can thus be "stepped" in the direction of the width 29.
  • the gradient 36 can be introduced essentially continuously, that is to say continuously, by taking into account a migration of the complexing agent in the electric field 31.
  • the formation of the gradient 36 may alternatively or additionally be assisted by creating or introducing a pH gradient.
  • the generation or introduction of the pH gradient can advantageously also be carried out without the introduction of a complexing agent, insofar as this promotes a separation of the rare earths 32.
  • the introduction of the starting sample 30 in the present case takes place through the second inlet 18 in the drawing from the right, the starting sample 30 preferably having been previously mixed with a portion of the carrier medium 20.
  • the carrier medium 20 is introduced, in each case the complexing agent was mixed in before increasing in concentration from right to left.
  • a coordinate system in the drawing above said four inlets 18 illustrates this process.
  • a complex destroyer 35 is introduced, which was preferably previously mixed with a portion of the carrier medium 20.
  • a major obstacle during the electrophoresis process may be hydration of the ions.
  • the ions are generally not free, but are surrounded by a solvation shell of solvent molecules and are very similar in their motion.
  • This circumstance can be influenced by the use of various complexing agent ligands.
  • ⁇ -isobutylbutyric acid can be used as complexing agent.
  • Other possible strong complexing agents are EDTA (ethylenediaminetetraacetic acid) or NTA (nitrilotriacetic acid).
  • Other possible weak complexing agents are acetate or humic acids as well as other organic acids.
  • the complexing agents may be mixed together in different ways with the starting sample 30 or introduced into the starting sample 30 and / or into the carrier medium 20.
  • the ligands can be added prior to treatment with the carrier-free, continuous electrophoresis.
  • the complexed ions thus show their specific properties at an early stage and thus differ from the other ions.
  • concentration a complexing agent binds to the cation is strongly dependent on the complexing constant of the respective ion species.
  • the described admixture of a ligand in the starting sample 30 only a single respective concentration of the ligand is possible.
  • the gradient 36 of the complexing agent transversely to the transport direction 24
  • various solutions - even at the same time - can be entered into the chamber. This is preferably done such that a respective concentration of the solution increases transversely to the transport direction 24 in the direction of a cathode generating the electric field 31.
  • the untreated starting sample 30 is preferably introduced on an anode side. As the ions of the parent sample 30 migrate toward the cathode, they simultaneously travel through the complexing agent gradient. Depending on the complexation constant of the cation, the complex is neutralized by a metallic bond to the outside and bound in the complex concentration.
  • FIG. 6 shows another embodiment of the rare earth separation method 32, in this case using isotachophoresis.
  • the separation of the rare earths 32 is essentially due to a different electrophoretic mobility (mobility) of the ions.
  • the process is carried out in a discontinuous buffer system.
  • the cations move between a so-called “leading electrolyte” (L +) with a comparatively high mobility and the so-called tail electrolyte (T +) with a comparatively low mobility.
  • L + leading electrolyte
  • T + tail electrolyte
  • the different lanthanides are separated according to their respective mobility and form layers.
  • the cation with the highest mobility follows directly the guide electrolyte, the molecule with the least mobility migrates in front of the final electrolyte.
  • FIG. 7 shows a further embodiment of the method for the separation of rare earths 32 by means of isotachophoresis.
  • the output sample 30 is performed not at the separate sample inlet 28 but at one of the inlets 18. In the present case, this is the second inlet 18 in the drawing from the right.
  • FIG. 8 shows a flow chart for carrying out the method for obtaining and / or separating and / or purifying rare earths 32, wherein carrier-free continuous electrophoresis is applied to the starting sample 30. Preferably, this is done by means of the device 10, as has already been shown in the above figures 1 to 7.
  • a start block 50 the procedure shown in FIG. 8 begins.
  • at least one additive 34 is introduced into the carrier medium 20 and mixed with it.
  • the output sample 30 is mixed.
  • a voltage is applied to the electrodes 14 and 16, whereby the electric field 31 is generated.
  • the mixed carrier medium 20 is continuously introduced into the device 10 by means of the inlets 18.
  • the output sample 30 is continuously introduced into the sample inlet 28.
  • a hydraulic pressure at the inlets 18 and the sample inlet 28 is at least slightly greater than a hydraulic pressure at the outlets 22.
  • the liquid medium 26 formed from the carrier medium 20 mixed with the additive 34 and the output sample 30 is transported in the transport direction 24, the electric field 31 being guided through the liquid medium 26 essentially transversely to the transport direction 24.
  • an at least partial collection of the carrier medium 20 and / or the at least one additive 34 is carried out by means of the outlets 22 by means of at least one outlet 22 in each case.
  • the collected carrier medium 20 and / or the collected at least one additive 34 by means arranged in the width 29 defined transversely to the transport direction 24 widths arranged inlets 18 for the carrier medium 20 and / or by means distributed in the width 29 additional additional inlets 18 for the at least one additive 34 is again introduced into the carrier medium 20.
  • a dashed line indicates the continuity of the method.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrostatic Separation (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares (32). Selon l'invention, sur un échantillon de départ (30) de terres rares (32), on utilise une électrophorèse continue sans support, l'échantillon de départ (30) étant placé dans un milieu de support (20) s'écoulant dans un dispositif de transport (24) et essentiellement perpendiculairement au dispositif de transport (24), on fait passer un champ électrique (31) dans un milieu fluide (26) formé par l'échantillon de départ (30) et le milieu de support (20) et après le parcours d'une voie de transport définie dans la direction de transport (24), au moins une terre rare (32) est recueillie au moyen d'au moins un orifice de sortie (22).
PCT/EP2014/069769 2013-09-19 2014-09-17 Procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares WO2015040045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013218796.3A DE102013218796A1 (de) 2013-09-19 2013-09-19 Verfahren zur Gewinnung und/oder zur Trennung und/oder zur Reinigung von Seltenen Erden
DE102013218796.3 2013-09-19

Publications (1)

Publication Number Publication Date
WO2015040045A1 true WO2015040045A1 (fr) 2015-03-26

Family

ID=51570503

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/069769 WO2015040045A1 (fr) 2013-09-19 2014-09-17 Procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares

Country Status (2)

Country Link
DE (1) DE102013218796A1 (fr)
WO (1) WO2015040045A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112430738A (zh) * 2020-11-24 2021-03-02 内蒙古汉生源科技有限公司 一种稀土永磁废料回收再利用的处理方法及电泳设备
CN113481392B (zh) * 2021-07-08 2022-06-24 王鲜 一种稀土采集用稀土提纯设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2292806Y (zh) * 1996-04-05 1998-09-30 中国科学院长春应用化学研究所 电解萃取分离稀土装置
JP2005264209A (ja) * 2004-03-17 2005-09-29 Japan Science & Technology Agency 常温溶融塩を用いた電気泳動法による希土類およびアルカリ土類元素の濃縮方法及び回収装置
US20080023333A1 (en) * 2006-07-17 2008-01-31 Brendan Johnson Microscale capacitive deionization apparatus
US20090134031A1 (en) * 2003-08-06 2009-05-28 David Bruce Ogle Electrophoresis membrane support and manifold unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB881037A (en) * 1957-01-31 1961-11-01 Geigy Ag J R Method for the concentration and separation of metals
US3085956A (en) * 1958-12-03 1963-04-16 Nat Res Dev Process and apparatus for effecting electrochromatographic separations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2292806Y (zh) * 1996-04-05 1998-09-30 中国科学院长春应用化学研究所 电解萃取分离稀土装置
US20090134031A1 (en) * 2003-08-06 2009-05-28 David Bruce Ogle Electrophoresis membrane support and manifold unit
JP2005264209A (ja) * 2004-03-17 2005-09-29 Japan Science & Technology Agency 常温溶融塩を用いた電気泳動法による希土類およびアルカリ土類元素の濃縮方法及び回収装置
US20080023333A1 (en) * 2006-07-17 2008-01-31 Brendan Johnson Microscale capacitive deionization apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GUPTA, C.K.; KRISHNAMURTHY, N.: "Extractive Metallurgy of Rare Earths", 2005, CRC PRESS
VOGT C ET AL: "Complex equilibria in capillary zone electrophoresis and their use for the separation of rare earth metal ions", ANALYTICA CHIMICA ACTA, ELSEVIER, AMSTERDAM, NL, vol. 294, no. 2, 19 August 1994 (1994-08-19), pages 145 - 153, XP026588759, ISSN: 0003-2670, [retrieved on 19940819], DOI: 10.1016/0003-2670(94)80189-4 *

Also Published As

Publication number Publication date
DE102013218796A1 (de) 2015-03-19

Similar Documents

Publication Publication Date Title
DE69109589T2 (de) Multifunktionelle elektrische Trennvorrichtung und Trennverfahren.
EP0497077B1 (fr) Appareil pour la préparation d'échantillon à fins d'analyse
DE68915412T2 (de) Gas-Flüssigkeitstrennungsverfahren und Vorrichtung für zweiphasige elektroleitende Gas-Flüssigkeitsströme.
DE69200387T2 (de) Verfahren zur Reinigung von Harzen mit Hilfe einer bipolaren Interface.
DE2948579A1 (de) Elektrode und verfahren zum entfernen einer metallischen substanz aus einer loesung unter verwendung dieser elektrode
DE3229142C2 (de) Verfahren und Vorrichtung zur chromatographischen Untersuchung einer Probenlösung auf Spurenmengen eines Anions
EP0113387A1 (fr) Procédé et appareil pour traiter des liquides, en particulier pour déminéraliser des solutions aqueuses
DE2404019C3 (de) Verfahren zur Rückgewinnung des Quecksilbers aus metallurgischen Abgasen
DE2140836A1 (de) Vorrichtung zur Durchfuhrung von Flussig Flussig Extraktion und Elektro lyse
DE102014007294A1 (de) Verfahren und technischer Prozess zum Behandeln von Feststoffen und Flüssigkeiten, sowie belastetem Erdreich und Gewässern
DE1592430A1 (de) Verfahren zum Anreichern von Uranisotopen
WO2015040045A1 (fr) Procédé d'obtention et/ou de séparation et/ou d'épuration de terres rares
WO1998043077A1 (fr) Procede pour electrophorese par derivation sans entraineur
DE2523117A1 (de) Verfahren und vorrichtung zur regeneration einer dekapierloesung
WO2007009749A1 (fr) Reacteur permettant de produire du phosphate ammoniaco-magnesien et procede de production de phosphate ammoniaco-magnesien a partir de lisier ou de gaz d'echappement contenant de l'ammonium
DE1300908B (de) Verfahren zur Anreicherung der Schweren Isotopen des Sauerstoffes
DE2137769C3 (de) Verfahren zur Abtrennung von Plutonium von Uran oder einem Transuran
DE102013205508A1 (de) Anlage und Verfahren zum Separieren von Metallen
DE2622497C2 (de) Elektrochemische Zelle
EP0712651A1 (fr) Procédé de récupération d'une substance ou d'un groupe de substances à partir d'un mélange
DE2708321A1 (de) Verfahren zur entfernung von jod
DE102009036080A1 (de) Verfahren zum Abbau von organischen Schadstoffen in industriellem Abwasser und zugehörige Anlage
DE1154074B (de) Verfahren zur Trennung von Fluessigkeitsgemischen im elektrischen Feld
DE8626617U1 (de) Vorrichtung zum Extrahieren von Metallen aus Abwässern
EP0187880A1 (fr) Procédé et appareil pour le traitement de liquides, en particulier pour la deminéralisation de solutions aqueuses

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: 14766985

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14766985

Country of ref document: EP

Kind code of ref document: A1