CN1055767A - Reduction-extraction chromatography for preparing fluorescent grade europium sesquioxide - Google Patents
Reduction-extraction chromatography for preparing fluorescent grade europium sesquioxide Download PDFInfo
- Publication number
- CN1055767A CN1055767A CN91103295A CN91103295A CN1055767A CN 1055767 A CN1055767 A CN 1055767A CN 91103295 A CN91103295 A CN 91103295A CN 91103295 A CN91103295 A CN 91103295A CN 1055767 A CN1055767 A CN 1055767A
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- CN
- China
- Prior art keywords
- rare earth
- reduction
- europium
- europiumsesquioxide
- chromes
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000000605 extraction Methods 0.000 title claims abstract description 8
- 238000004587 chromatography analysis Methods 0.000 title claims abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 64
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 39
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 239000003480 eluent Substances 0.000 claims abstract description 12
- 230000002829 reductive effect Effects 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 230000005526 G1 to G0 transition Effects 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 8
- -1 europium rare earth Chemical class 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000010828 elution Methods 0.000 claims description 5
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052745 lead Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 2
- 229910052691 Erbium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052689 Holmium Inorganic materials 0.000 claims description 2
- 229910052765 Lutetium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052772 Samarium Inorganic materials 0.000 claims description 2
- 229910052771 Terbium Inorganic materials 0.000 claims description 2
- 229910052775 Thulium Inorganic materials 0.000 claims description 2
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 229910001940 europium oxide Inorganic materials 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000011701 zinc Substances 0.000 description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 239000008187 granular material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- GZCWLCBFPRFLKL-UHFFFAOYSA-N 1-prop-2-ynoxypropan-2-ol Chemical compound CC(O)COCC#C GZCWLCBFPRFLKL-UHFFFAOYSA-N 0.000 description 1
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 1
- 102000013563 Acid Phosphatase Human genes 0.000 description 1
- 108010051457 Acid Phosphatase Proteins 0.000 description 1
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229910052789 astatine Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Luminescent Compositions (AREA)
Abstract
The present invention utilizes reduction extraction chromatography to separate europium from other rare earth elements and non-rare earth elements. The Eu is processed by passing the europium-containing feed liquid through a reduction column3+Reduction to Eu2+And the obtained product enters a separation column taking the extraction resin as a stationary phase, and acid with a certain concentration is taken as an eluent to simultaneously separate other rare earth impurities and non-rare earth impurities, so that the high-purity low-impurity-content fluorescent-grade europium oxide is obtained. The process is continuous, the process steps are reduced by more than 10 steps, the variety of the required chemical materials is less, and the cost is reduced by 40 percent. All indexes are higher than national standards.
Description
The invention belongs to a kind of hydrometallurgy rare earth element separating technology, reduction-chromes separation of rare earth elements.
As everyone knows: rare earth element comprises Sc, y and lanthanon, because their character is very similar, thereby makes its separation each other very difficult, in these 17 kinds of elements, Eu is one of element that has special property, because its ion has Eu
2+, Eu
3+Two kinds of valence states, and Eu
2+Be RE usually
2+Other rare earth element ion bigger difference is arranged in nature, this characteristic is utilized by people just, with comparalive ease it is separated from other rare earth element.Europium has important use on metallurgy, national defence, electronic industry and luminescent material, especially increase day by day at the rouge and powder of colour television set and the purposes aspect the luminescent lamp powder.Along with colour television set to high definition, the development of giant-screen direction, requirement to fluorescence europium oxide is more and more higher, because non-rare earth impurity wherein is influential to its luminescent properties, and other rare earth element exists as impurity, also influential to its luminosity, wherein the influence of CeNd more so.
At present, domestic production pure zirconia europium current technology has two kinds, a kind of " chemical method " that forms based on the U.S. molybdenum company proposition sixties " its shallow lake-alkalinity method " and step improvement then, this processing method rare earth element impurity separating effect is not very, non-rare earth impurity Ca, Fe, Pb, Ni etc. can not get separating, quality product does not reach the fluorescence level, and production process is long, complicated operation.
Another kind is the pure Eu of preparation
2O
3Technology, this technology just replace zinc powder to make reductive agent with the zinc granule post, and other operation and alkalinity method are basic identical, prepare＞4NEu
2O
3, quality product does not reach the fluorescence grade standard, and production process is long, complicated operation.
In addition, Chinese patent application CN1040564A discloses the method for separating beavy metal from europium-containing solution, and this method is by adding heavy metal ion in chemical reagent and the feed liquid precipitation that reacts, so as to reaching the purpose of removing beavy metal impurity.But this method condition control is strict, not easy to operate, and can not separate other impurity metal ion, and for example metallic impurity Ca relies on this method just can't remove, and makes product be difficult to reach the fluorescence grade standard.
Another kind of Chinese patent application CN1033783A discloses a kind of method with reduction method separating and extracting fluorescence-level europiumsesquioxide from rareearth enriching material, and this method is that the first step reduction adopts the low pressure mercury lamp irradiation to contain Eu
3+Rare earths salt, make Eu
3+Be reduced into Eu
2+, and make it form difficulty soluble salt and other coexistence Rare Earth Separation, and also need to connect alkalinity method and separate purification, therefore exist operation long too, operational difficulty, quality product is difficult for guaranteeing.
In addition, Japanese Patent is openly speciallyyed permit the clear 61-83624A of communique and is disclosed usefulness Zn grain post reduction Eu
3+, preparing europium sesquioxide with classical way, europium sesquioxide purity is low, is not the fluorescence level, and by reduction column, efficient is low from bottom to up for feed liquid, and cyclical operation is repeatedly.
Another kind of Japanese Patent is openly speciallyyed permit the clear 62-252317A of communique and is disclosed with Zn and reduce Eu
3+The time add xitix, then at N
2Atmosphere protection prepares europium sesquioxide with extracting and separating such as acid phosphatase fat, naphthenic acid down, and purity is low, is not the product of fluorescence level, and the feed liquid organic phase all need be used N
2Deng processing, the equipment complexity, operational difficulty, operation is many, and chemical materials consumption is big, the cost height.
The objective of the invention is to be to provide a kind of with reduction-chromes, i.e. zinc column reduction, twice extraction chromatography separation is with Eu
3+Be reduced to Eu
2+, utilize Eu
2+With RE
3+Nature difference, with P
507Extration resin is a stationary phase, is eluent with hydrochloric acid, from containing 8-90% Eu
2O
3Efficient non-europium rare earth element of sharp separation and non-rare earth in the raw material, the preparation fluorescence europium oxide.
The objective of the invention is that following technology realizes by having: be to contain the europium feed liquid by reduction column 3, with Eu
3+Be reduced to Eu
2+, entering with the extration resin is the separator column 1 of stationary phase, is eluent with certain density acid, and other rare earth impurities is separated simultaneously with non-rare earth impurity.Sepn process on the separator column 1 is to be reduced 3 reductive Eu of post
2+Be tervalent non-europium rare earth element and separate that (trivalent rare earth ions is adsorbed on the stationary phase in the separator column, and Eu
2+Be not adsorbed).Effluent liquid is through oxide treatment, Eu
2+Be oxidized to Eu
3+, the stepwise elution through separator column 2 makes europium separate with other minute quantity rare earth element and non-rare earth.Extration resin as the separator column stationary phase is P
507, P
204Extration resin can make europium separate (comprising La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, 15 kinds of elements of Sc) with non-europium rare earth element.Can make europium separate (comprising Ca, Fe, Cu, Ni, Pb, Si, At, Mg, Ba, Zn) with non-rare earth impurity.Contain the aqueous solution that the europium rare earth feed liquid is a rare earth chloride, its concentration is 50-300g/l with the content of rare earth oxide, in the muriatic aqueous solution of rare earth element hydrogen ion concentration be 0.001M to 0.0001M, promptly pH value is 3-4.The 8-90%(that contains europium in the muriatic aqueous solution of rare earth element and be whole content of rare earth represents that with the content of oxide compound all rare earths comprise 15 kinds of elements of yttrium).The rare earth element aqueous chloride solution is to produce or the thick europium of alkalinity method production obtains through acid is molten again by extraction.Contain the europium rare earth feed liquid successively by reduction column 3, separator column 1, i.e. reduction column adding suitable for reading is flowed out from separator column 1 end opening.Separator column 1 end opening effluent liquid receives and through oxide treatment, enters separator column 2 again and carry out europium and other rare earth element of minute quantity and separating of non-rare earth, for further improving purity.Separator column 1 end opening effluent liquid oxidation processes is by adding oxygenant (H under alkaline condition
2O
2) realize that (wherein europium is with Eu to obtain the muriatic aqueous solution of pure europium at last
3+State exists), content of rare earth is expressed as 20-50g/l with oxide content, and pH value is 3-4.When separator column 2 separates, carry out stepwise elution with the acid of different concns.Drip washing acid is hydrochloric acid, and concentration is respectively 0.1M-4.0M.Institute's receiving unit is a 0.4-2.0M hydrochloric acid drip washing section during stepwise elution.Institute's receiving unit obtains fluorescence europium oxide and contains Eu through the oxalic acid precipitation calcination
2O
3＞99.99%(Eu
2O
3/ REo) whole process yield 〉=95%, foreign matter content Fe
2O
3, Ca＜5ppm.
Reduction-chromes of the present invention prepare fluorescence level europiumsesquioxide, utilize the thick europium raw material of zinc post (filling φ 3-5mm zinc granule in the post) reduction, make Eu
3+Be reduced to Eu
2+, for condition has been created in its separation, with P with highly selective
507Adsorption by Extracting Resins is carried out drip washing with eluent, makes Eu and non-europium rare earth and non-rare earth impurity element sharp separation simultaneously.
The present invention prepares fluorescence level Eu in conjunction with reduction-chromes
2O
3Process flow sheet further describes:
(1) fills φ 3-5mm zinc granule in the reduction column.
(2) P
507The extration resin stationary phase contains P
507〉=55%; Granularity is that 0.147-0.058mm accounts for 90%, and volume density is 0.52-0.60g/ml, and form is the white solid bead, and spheroid is smooth complete.
(3) eluent 4 is 0.1-0.4MHCl.
Eluent 5 is 0.4-2.0MHCl.
Eluent 6 is 3-4MHCl.
(4) feed liquid is for containing 90% thick Eu
2O
3, concentration is 150g/l.
Reduction-chromes of the present invention prepare fluorescence level europiumsesquioxide invention effect compared with prior art:
1, prepares fluorescence level Eu with reduction extraction chromatography
2O
3, the rare earth of europium is separated simultaneously with the non-rare earth impurity element, the separation efficiency height.
2, compare with class methods with domestic and foreign current, technological process is continuous, and is simple to operate, and process few (step surplus the minimizing operation 10) is easily promoted on industrial production.
3, quality product height, and stable, and every index all is higher than national standard.
4, required chemical materials kind is few, and consumption is little, reduces cost 40%.
Most preferred embodiment 1 of the present invention:
(1) feed liquid preparation: get content former 1 thick europium as shown in table 1, use dissolving with hydrochloric acid, join and cause 150g/l, pH value is 2-4.
Each ree content table 1 in the thick europium raw material
(2) reduction column: in fill zinc granule.
(3) separator column 1, separator column 2, interior dress P
507Extration resin, with 4M salt pickling Fe, being washed to pH value is that 5-6 is stand-by.
(4) reduction column 3 is connected with separator column 1, and feed liquid flows into from reduction column 3 tops, flows out from separator column 1 lower end.
(5) above-mentioned leacheate adds NH
4OH, pH value＞10 add H
2O
2Oxidation, transferring pH value with 1: 1 HCl is 2-3, concentration is 50g/l(REO).
(6) feed liquid of " 5 " is advanced separator column 2, with eluent 4, and eluent 5, eluent 6 drip washing access the part leacheate of eluent 5.
(7) the reception liquid of " 6 " accent pH value is 1, and the heavy fixed 900 ℃ of calcinations of oxalic acid promptly get fluorescence level Eu
2O
3, its non-rare earth and rare earth impurity see table 2 for details, the Eu-1 of table 3.
Most preferred embodiment 2 of the present invention:
Feed liquid content former-2 thick europium as shown in table 1 is used dissolving with hydrochloric acid, is assigned to-200g/l pH value 2-4.
Following implementation step is identical with embodiment 1, obtains Eu
2O
3Product middle-weight rare earths and non-rare earth impurity content see the Eu-2 of table 2, table 3 for details.
Eu
2O
3Middle non-rare earth impurity content (ppm) table 2
EuO
3Rare earth impurity (ppm) table 3
Claims (10)
1, to prepare fluorescence level europiumsesquioxide be to utilize reduction extraction chromatography to make europium and other rare earth element and the isolating technology of non-rare earth in the rare earth element to a kind of reduction-chromes, it is characterized in that; Be to contain the europium feed liquid by reduction column, with Eu
3+Be reduced to Eu
2+, entering with the extration resin is the separator column of stationary phase, is eluent with certain density acid, and other rare earth impurities is separated simultaneously with non-rare earth impurity.
2, reduction-chromes according to claim 1 prepare fluorescence level europiumsesquioxide, it is characterized in that: the sepn process on the separator column 1 is to be reduced 3 reductive Eu of post
2+Be tervalent non-europium rare earth element and separate, effluent liquid is through oxide treatment, Eu
2+Be oxidized to Eu
3+, the stepwise elution through on the separator column 2 makes europium separate with other minute quantity rare earth element and non-rare earth.
3, reduction extraction chromatography according to claim 1 and 2 prepares fluorescence level europiumsesquioxide, it is characterized in that: the extration resin of separator column stationary phase is P
507, P
204Extration resin.
4, reduction-chromes according to claim 1 and 2 prepare fluorescence level europiumsesquioxide, it is characterized in that: europium separates with non-europium rare earth element and comprises La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, 15 kinds of elements of Sc, and europium separates with non-rare earth impurity and comprises Ca, Fe, Cu, Ni, Pb, Si, Al, Mg, Ba, Zn.
5, prepare fluorescence level europiumsesquioxide according to claim 1 or 4 described reduction-chromes, it is characterized in that: contain the aqueous solution that the europium rare earth feed liquid is a rare earth chloride, its concentration is 50-300g/l with the content of rare earth oxide, hydrogen ion concentration is 0.001M-0.0001M in the muriatic aqueous solution of rare earth element, and promptly pH value is 3-4.
6, reduction-chromes prepare fluorescence level europiumsesquioxide according to claim 1 or 5, it is characterized in that: contain the 8-90% that europium is a content of rare earth in the muriatic aqueous solution of rare earth element, rare earth comprises 15 kinds of elements of yttrium.
7, reduction-chromes according to claim 1 and 2 prepare fluorescence level europiumsesquioxide, it is characterized in that: contain the europium rare earth feed liquid by reduction column 3, separator column 1, promptly from reduction column 3 addings suitable for reading, flow out from separator column 1 end opening, separator column 1 end opening effluent liquid receives through oxide treatment, enters separator column 2 again and carries out europium and other rare earth element of minute quantity and separating of non-rare earth.
8, prepare fluorescence level europiumsesquioxide according to claim 1 or 2 or 7 described reduction-chromes, it is characterized in that: separator column 1 end opening effluent liquid oxide treatment adds oxygenant H under alkaline condition
2O
2Realize that obtain the muriatic aqueous solution of pure europium, content of rare earth is expressed as 20-50g/l with oxide content, pH value is 3-4.
9, reduction-chromes according to claim 1 and 2 prepare fluorescence level europiumsesquioxide, it is characterized in that: drip washing acid is hydrochloric acid, and concentration is respectively 0.1M-4.0M, and institute's receiving unit is a 0.4M-2.0M hydrochloric acid drip washing section during stepwise elution.
10, prepare fluorescence liquid europiumsesquioxide according to claim 1 or 9 described reduction-chromes, it is characterized in that: europium sesquioxide contains Eu
2O
3＞99.99%Eu
2O
3/ REO, yield 〉=95%, foreign matter content Fe
2O
3, CaO＜5ppm, CeO
2＜1ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91103295A CN1025222C (en) | 1991-05-22 | 1991-05-22 | Preparation method of fluorescent-grade europium sesquioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91103295A CN1025222C (en) | 1991-05-22 | 1991-05-22 | Preparation method of fluorescent-grade europium sesquioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055767A true CN1055767A (en) | 1991-10-30 |
| CN1025222C CN1025222C (en) | 1994-06-29 |
Family
ID=4906016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91103295A Expired - Fee Related CN1025222C (en) | 1991-05-22 | 1991-05-22 | Preparation method of fluorescent-grade europium sesquioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025222C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093301C (en) * | 1995-10-26 | 2002-10-23 | 中村标签株式会社 | Forgery-preventing textured emblem |
| CN105063382A (en) * | 2015-09-12 | 2015-11-18 | 北京科技大学 | Separation method of La, Ce, Pr and Nd mixed rare earth ions |
| CN106415734A (en) * | 2014-05-13 | 2017-02-15 | 保罗·谢勒学院 | Production of 43Sc radionuclide and radiopharmaceuticals thereof for use in positron emission tomography |
-
1991
- 1991-05-22 CN CN91103295A patent/CN1025222C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093301C (en) * | 1995-10-26 | 2002-10-23 | 中村标签株式会社 | Forgery-preventing textured emblem |
| CN106415734A (en) * | 2014-05-13 | 2017-02-15 | 保罗·谢勒学院 | Production of 43Sc radionuclide and radiopharmaceuticals thereof for use in positron emission tomography |
| CN106415734B (en) * | 2014-05-13 | 2019-02-15 | 保罗·谢勒学院 | Production43Sc radionuclide and its radiopharmaceutical are used for positron emission tomography |
| US10357578B2 (en) | 2014-05-13 | 2019-07-23 | Paul Scherrer Institut | Production of 43SC radionuclide and radiopharmaceuticals thereof for use in positron emission tomography |
| CN105063382A (en) * | 2015-09-12 | 2015-11-18 | 北京科技大学 | Separation method of La, Ce, Pr and Nd mixed rare earth ions |
| CN105063382B (en) * | 2015-09-12 | 2017-06-13 | 北京科技大学 | A kind of separation method of La, Ce, Pr, Nd mixed rare earth ions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025222C (en) | 1994-06-29 |
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