JP5103541B2 - ニオブの分離精製方法及び製造方法 - Google Patents
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- niobium
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- 239000010955 niobium Substances 0.000 title claims description 127
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 title claims description 118
- 229910052758 niobium Inorganic materials 0.000 title claims description 116
- 238000000926 separation method Methods 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 28
- 238000000746 purification Methods 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 95
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 88
- 239000002994 raw material Substances 0.000 claims description 65
- 239000012535 impurity Substances 0.000 claims description 39
- 239000007864 aqueous solution Substances 0.000 claims description 37
- 239000003960 organic solvent Substances 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 36
- 229910052796 boron Inorganic materials 0.000 claims description 33
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 32
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims description 25
- 229910000484 niobium oxide Inorganic materials 0.000 claims description 24
- 239000003085 diluting agent Substances 0.000 claims description 17
- 238000000605 extraction Methods 0.000 claims description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003125 aqueous solvent Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- LFGREXWGYUGZLY-UHFFFAOYSA-N phosphoryl Chemical group [P]=O LFGREXWGYUGZLY-UHFFFAOYSA-N 0.000 claims description 9
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 239000003209 petroleum derivative Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000011135 tin Substances 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- WPCMRGJTLPITMF-UHFFFAOYSA-I niobium(5+);pentahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[Nb+5] WPCMRGJTLPITMF-UHFFFAOYSA-I 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 14
- 238000011084 recovery Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 12
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- -1 optical Chemical compound 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004993 emission spectroscopy Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 150000002431 hydrogen Chemical group 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- GTVWRXDRKAHEAD-UHFFFAOYSA-N Tris(2-ethylhexyl) phosphate Chemical compound CCCCC(CC)COP(=O)(OCC(CC)CCCC)OCC(CC)CCCC GTVWRXDRKAHEAD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009089 cytolysis Effects 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 239000011698 potassium fluoride Substances 0.000 description 2
- 235000003270 potassium fluoride Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- WVPGXJOLGGFBCR-UHFFFAOYSA-N trioctyl phosphate Chemical compound CCCCCCCCOP(=O)(OCCCCCCCC)OCCCCCCCC WVPGXJOLGGFBCR-UHFFFAOYSA-N 0.000 description 2
- 125000003837 (C1-C20) alkyl group Chemical group 0.000 description 1
- MNZAKDODWSQONA-UHFFFAOYSA-N 1-dibutylphosphorylbutane Chemical compound CCCCP(=O)(CCCC)CCCC MNZAKDODWSQONA-UHFFFAOYSA-N 0.000 description 1
- GYGISEPATDGSPS-UHFFFAOYSA-N 1-didecylphosphoryldecane Chemical compound CCCCCCCCCCP(=O)(CCCCCCCCCC)CCCCCCCCCC GYGISEPATDGSPS-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910001257 Nb alloy Inorganic materials 0.000 description 1
- 229910019800 NbF 5 Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- HRKAMJBPFPHCSD-UHFFFAOYSA-N Tri-isobutylphosphate Chemical compound CC(C)COP(=O)(OCC(C)C)OCC(C)C HRKAMJBPFPHCSD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- LDDQLRUQCUTJBB-UHFFFAOYSA-O azanium;hydrofluoride Chemical compound [NH4+].F LDDQLRUQCUTJBB-UHFFFAOYSA-O 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002822 niobium compounds Chemical class 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000008096 xylene 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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
-
- 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
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
該抽出後の有機溶媒を水または硫酸で洗浄して該有機溶媒中に残存する不純物をさらに低減する第二工程と、該不純物が低減された有機溶媒中に含まれるニオブを水系溶媒により逆抽出することによってニオブ精製液を得る第三工程と、を有するニオブ分離精製方法であって、前記第一工程における原料水溶液中のフリーのフッ化水素酸濃度が2〜10mol/Lであり、ニオブ精製液の不純物のホウ素含有量が、当該ニオブ精製液から得られる酸化ニオブに対して10ppm以下であることを特徴とする。
トリ−n−オクチルホスフィンオキシド(以下、TOPOともいう)またはトリ−n−ブチルホスフェート(以下、TBPともいう)である。TOPOは、ニオブとホウ素とを分離する能力が高く、TBPは、ニオブとホウ素とを分離する能力はTOPOに若干劣るが、比較的安価であるからである。
このような高純度の酸化ニオブは、電子材料や光学材料に応用した際に、これらの特性を大きく向上させることができる。
−硫酸:ICP発光分光法にて硫黄を測定して硫酸濃度に換算
−フリーのフッ化水素酸:イオン交換分離、フッ素イオン電極法(標準添加)
−K、Na:原子吸光光度法
−その他:ICP発光分光法
−Si:イオン交換分離・モリブデンブルー吸光光度法
−K:イオン交換分離、原子吸光光度法
−その他:イオン交換分離、ICP発光分光法
Claims (5)
- ニオブを含み、フッ化水素酸及び硫酸を含有する原料水溶液に、下記一般式を有するホスホリル系抽出剤;
該抽出後の有機溶媒を水または硫酸で洗浄して該有機溶媒中に残存する不純物をさらに低減する第二工程と、
該不純物が低減された有機溶媒中に含まれるニオブを水系溶媒により逆抽出することによってニオブ精製液を得る第三工程と、を有するニオブ分離精製方法であって、
前記第一工程における原料水溶液中のフリーのフッ化水素酸濃度が2〜10mol/Lであり、かつ、原料水溶液中の硫酸濃度が前記原料水溶液中のフリーのフッ化水素酸濃度に対して0.1〜1.25倍であり、
ニオブ精製液の不純物のホウ素含有量が、当該ニオブ精製液から得られる酸化ニオブに対して10ppm以下であることを特徴とするニオブの分離精製方法。 - 前記第一工程における原料水溶液中の硫酸濃度は8mol/L以下である請求項1に記載のニオブの分離精製方法。
- 前記第三工程における逆抽出後の有機溶媒の一部または全部を、前記第一工程の有機溶媒の一部または全部として循環させる工程を含む請求項1または2に記載のニオブの分離精製方法。
- 請求項1〜3のいずれか一項に記載のニオブの分離精製方法により得られたニオブ精製液に、アンモニアを添加して水酸化ニオブを沈殿させ、該沈殿物をろ過し、仮焼して、酸化ニオブを製造することを特徴とするニオブの製造方法。
- 請求項4に記載のニオブの製造方法により得られた酸化ニオブであって、不純物としてのホウ素、ケイ素、カリウム、錫、アンチモン、銅、亜鉛における、それぞれの含有量が10ppm以下であり、
さらに、不純物としての鉄、チタン、リンにおける、それぞれの含有量が1ppm以下であることを特徴とする酸化ニオブ。
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JP2011077672A JP5103541B2 (ja) | 2011-03-31 | 2011-03-31 | ニオブの分離精製方法及び製造方法 |
PCT/JP2011/077009 WO2012132107A1 (ja) | 2011-03-31 | 2011-11-24 | ニオブの分離精製方法及び製造方法 |
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WO (1) | WO2012132107A1 (ja) |
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