JP5596539B2 - アルミニウム鉱石からアルミニウム及び鉄を抽出する方法 - Google Patents
アルミニウム鉱石からアルミニウム及び鉄を抽出する方法 Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 title claims description 102
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 88
- 238000000034 method Methods 0.000 title claims description 76
- 229910052742 iron Inorganic materials 0.000 title claims description 70
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 52
- -1 aluminum ions Chemical class 0.000 claims description 105
- 239000000203 mixture Substances 0.000 claims description 61
- 239000008346 aqueous phase Substances 0.000 claims description 53
- 239000012074 organic phase Substances 0.000 claims description 49
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 239000003960 organic solvent Substances 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 23
- 239000002253 acid Substances 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 14
- 230000002378 acidificating effect Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 239000012510 hollow fiber Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 238000002386 leaching Methods 0.000 claims description 11
- QUXFOKCUIZCKGS-UHFFFAOYSA-N bis(2,4,4-trimethylpentyl)phosphinic acid Chemical group CC(C)(C)CC(C)CP(O)(=O)CC(C)CC(C)(C)C QUXFOKCUIZCKGS-UHFFFAOYSA-N 0.000 claims description 8
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 claims description 8
- 125000002524 organometallic group Chemical group 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 6
- 150000001335 aliphatic alkanes Chemical group 0.000 claims description 5
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical group O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000003929 acidic solution Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 19
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000012071 phase Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000010908 decantation Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- ZDFBXXSHBTVQMB-UHFFFAOYSA-N 2-ethylhexoxy(2-ethylhexyl)phosphinic acid Chemical compound CCCCC(CC)COP(O)(=O)CC(CC)CCCC ZDFBXXSHBTVQMB-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000000622 liquid--liquid extraction Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 238000004131 Bayer process Methods 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HLQQMPGKASWZPH-UHFFFAOYSA-N diethyl hexyl phosphate Chemical compound CCCCCCOP(=O)(OCC)OCC HLQQMPGKASWZPH-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052664 nepheline Inorganic materials 0.000 description 1
- 239000010434 nepheline Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- 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
- C22B21/00—Obtaining aluminium
- C22B21/0007—Preliminary treatment of ores or scrap or any other metal source
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
- C01F7/22—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with halides or halogen acids
-
- 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
- C22B21/00—Obtaining aluminium
- C22B21/0015—Obtaining aluminium by wet processes
-
- 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
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/10—Hydrochloric acid, other halogenated acids or salts thereof
-
- 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
-
- 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
-
- 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
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
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- 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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- Manufacture And Refinement Of Metals (AREA)
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Description
浸出液と固体残留物を取得するため、アルミニウム鉱石を酸で浸出する工程と、
(i)アルミニウム濃縮組成物を取得するため、pHが10以上である塩基性条件下、鉄イオンの少なくとも一部を実質上選択的に沈殿させること、又は
(ii)アルミニウム濃縮組成物を得るために、鉄イオンと実質選択的に有機金属錯体を形成するのに適した抽出剤で鉄イオンの少なくとも一部を実質選択的に錯形成させることにより、
浸出液中に含まれる鉄イオンの少なくとも一部を除去する工程
を具える。
後続の工程中での進展を助けるために、アージライトを細かく粉砕してもよい。例えば、微粉砕化することで反応時間を数時間(約2〜3時間)に短縮できる。鉄の大部分を除去するため、粉砕工程と焙焼工程間に任意選択的に室温での浸出を行う(選択1参照)。本操作は、例えば、塩酸HCl(12M)を用いて、アージライト/酸の比率(重量/体積)1:5にて実施する。実験条件(粒子径、処理時間、撹拌システム)によるが、約65%〜約93%の鉄を除去できる。しかしながら、本浸出工程は、また、数%のアルミニウム(0〜5%)をもっていってしまい得る。アージライトの前処理の最終工程は、前処理したアージライトを焙焼する工程を具える。本工程は550℃より高い温度で約1〜2時間行ってもよい。例えば、加熱処理によって、同一期間に抽出されるアルミニウム量を約30%〜約40%増大できる。換言すれば、抽出されるアルミニウム量が倍増する。酸を回収し加熱コストを低減するため、室温での浸出を実施する場合、焙焼前に相分離がなされる。
酸浸出工程は、所定期間中に高温で、粉砕し焙焼したアージライトを塩酸溶液と反応させることを含む。例えば、アージライト/酸の比率は約1:10(重量/体積)であり、HCl濃度は約6Mであり、温度は約100℃〜約110℃であり、反応時間は約5時間〜約7時間であってもよい。このような条件下では、不純物に加えて、約90%超のアルミニウムと約100%の鉄を抽出できる。
例えばpHが10以上又は約11.5〜約12.5の塩基性媒体中で後者を沈殿させることで、鉄の除去を行ってもよい。このような工程は、例えば10Mの濃度で、NaOHを添加することにより行ってもよい。KOHなど他の塩基も使用してもよい。そして、ろ過、デカンテーション又は遠心分離によって液体部分から固形部分を分離し、希釈した塩基、NaOH溶液など(例えば0.01M〜0.02Mの濃度のNaOH)によって固体分をすすぐだけで済む。それから、蒸留水で固体分を洗浄する。液体部分はアルミニウムとアルカリ土類等を含んでいる。こうして、実質的に完全な鉄の除去とほとんど全ての不純物(他の金属)の除去が達成できる。任意選択的に、中空糸膜を通した液−液抽出による精製工程を用いて、鉄を回収することが可能である(選択2参照)。
沈殿又は抽出技術を用いた前工程から得られた溶液は、比較的清浄で主として例えば約90%〜95%のアルミニウム(沈殿法の場合アルカリ土類等を含まない)を含む。後者の回収は、液−液抽出によって、例えば同じ中空糸膜と、他の金属や残留物より少なくともアルミニウムと実質選択的に錯体形成するのに適応した抽出剤とを使って行ってもよい。例えば、ビス(2,4,4−トリメチルペンチル)ホスフィン酸(市販商品名Cyanex(商標)272など)をアルミニウムに特化した抽出剤として使用してもよい。例えば、この抽出剤はヘプタンなどの有機溶媒中で約20体積/体積%の濃度で使用してもよい。水相:有機相の比率は、約1:1〜約1:3にしてもよい。例えば、抽出温度は約40℃でpHは約2.5〜約3.5に維持してもよい。このような技術によって、70〜90%以上のアルミニウムを抽出することが可能となることが観察された。アルミニウムが有機相に捕捉された後、逆抽出法を用いて濃縮されたAl3+の形で回収してもよい。例えば、約40℃の温度で塩酸(例えば6Mの濃度で)を加え逆抽出してもよい。この条件下、90%超のアルミニウムが回収できる。そして、NaOHを添加することによりAl3+を水酸化アルミニウムAl(OH)3へ転化してもよい。最終的に、Al(OH)3をアルミナ(アルミナAl2O3)へ、例えば約800℃〜約1200℃の温度で焙焼することにより転化してもよい。
(アージライト試料の前処理工程)
・泥岩の粉砕工程:
試験に採用した微粒子化物の平均値は、10から50ミクロン間の範囲であった。
粉砕し焙焼したアージライト500gに、6M塩酸5リットルを加えた。100℃〜110℃で7時間、混合物を加熱した。
残液の体積を若干希釈し(+25%)、pHが11.5より高くなるまで濃厚な水酸化ナトリウム(10M)を添加した。標準的なろ過によって溶液から生成した沈殿物を分離し、希薄なNaOHと高温の超純水で数回洗浄した。沈殿物には鉄分すべてと金属不純物の大部分が含まれていた。ろ過物には、Al3+イオンに加えて主にはアルカリ−土類等及び以下に記す少量の不純物が含まれていた:
6MのHClを添加して、ろ過物のpHを2.5〜3.5に調整する。有機溶媒に対して20体積/体積%、体積比率1:1にて、錯形成剤、Cyanex272によって、得られた溶液を抽出する。40℃の温度で中空糸を具える膜接触器中にて抽出を行う。約30〜60分以内に、アルミニウムの85%超を抽出する。NaOH(10M)添加量の調節ループ制御によってpHを調整する。次に、40℃で有機相/酸相の体積比率を1:0.5にしてHCl(6M)により逆抽出することで、Cyanex中で錯形成したAl3+を回収する。逆抽出後、回収した酸相の組成は以下であった:
Claims (33)
- 鉄イオンとアルミニウムイオンを含む混合物からアルミニウムイオンを抽出する方法であって、該アルミニウムイオン、該鉄イオン、酸、有機溶媒、及び該鉄イオン又は該アルミニウムイオンと実質選択的に有機金属錯体を形成するのに適した抽出剤を含む組成物から該アルミニウムイオンを回収する工程を具え、該抽出剤は該有機溶媒に可溶であり、
該抽出剤が、該鉄イオンと実質選択的に有機金属錯体を形成するのに適している場合には、該組成物は、該アルミニウムイオン及び該酸を含む酸性の水相と、該有機溶媒及び該抽出剤と錯形成した該鉄イオンを含む有機相とを含み、該有機相から該水相を中空糸膜によって分離し、該分離された水相を塩基と反応させることで、Al(OH)3の形態で該アルミニウムイオンを回収し、
該抽出剤が、該アルミニウムイオンと実質選択的に有機金属錯体を形成するのに適している場合には、該組成物は、該鉄イオン及び該酸を含む酸性の水相と、該有機溶媒及び該抽出剤と錯形成した該アルミニウムイオンを含む有機相とを含み、該有機相から該水相を中空糸膜によって分離し、該分離された有機相をHClと反応させて、該アルミニウムイオンを含む別の水相と別の有機相とを得て、該別の有機相から該別の水相を分離し、該別の水相を塩基と反応させることで、Al(OH)3の形態で該アルミニウムイオンを回収することを特徴とする方法。 - 前記抽出剤が、前記鉄イオンと実質選択的に有機金属錯体を形成するのに適していることを特徴とする請求項1に記載の方法。
- 前記酸性の水相のpHが1〜2.5であることを特徴とする請求項2に記載の方法。
- 前記酸性の水相のpHが2であることを特徴とする請求項2に記載の方法。
- 前記抽出剤が、ジ(2−エチルヘキシル)リン酸(HDEHP)であることを特徴とする請求項2に記載の方法。
- 前記有機溶媒がC5〜C12のアルカン及びその混合物から選択されることを特徴とする請求項5のいずれかに記載の方法。
- 前記塩基がNaOH、KOH又はその混合物から選択されることを特徴とする請求項6に記載の方法。
- 前記水相と塩基との反応後、前記アルミニウムイオンをAl(OH)3の形態で回収するためにろ過により分離する工程を含む、請求項2〜6のいずれかに記載の方法。
- 更に、Al(OH)3をAl2O3に転化する工程を含む、請求項8に記載の方法。
- 前記抽出剤が、前記アルミニウムイオンと実質選択的に有機金属錯体を形成するのに適していることを特徴とする請求項1に記載の方法。
- 前記水相のpHが2.5〜3.5であることを特徴とする請求項10に記載の方法。
- 前記抽出剤がホスフィン酸又はその誘導体であることを特徴とする請求項10に記載の方法。
- 前記抽出剤がビス(2,4,4−トリメチルペンチル)ホスフィン酸であることを特徴とする請求項10に記載の方法。
- 前記有機溶媒がC5〜C12のアルカン及びその混合物から選択されることを特徴とする請求項12に記載の方法。
- 前記分離した有機相をHClと反応させ、前記アルミニウムイオン及び別の有機相を含む別の水相を得ることを特徴とする請求項10に記載の方法。
- pHを4以上にするため、前記別の水相を前記塩基で処理することを特徴とする請求項10に記載の方法。
- 前記水相と塩基との反応後、Al(OH)3を取得するためにろ過により分離する工程を含む、請求項10〜16のいずれかに記載の方法。
- 更に、Al(OH)3をAl2O3に転化する工程を含む、請求項17に記載の方法。
- 前記分離した有機相をHClと反応させ、前記アルミニウムイオン及び別の有機相を含む別の水相を得ることを特徴とする請求項11に記載の方法。
- 組成物に含まれる鉄イオンからアルミニウムイオンを少なくとも部分的に分離する方法であって、pHが10以上である塩基性条件下、該鉄イオンの少なくとも一部を実質選択的に沈殿させる工程、及び該沈殿した鉄イオンを中空糸膜によって精製する工程を具える、方法。
- アルミニウム鉱石からアルミニウムを抽出する方法であって、
浸出液と固体残留物を取得するために、該アルミニウム鉱石を酸で浸出する工程と、該浸出液を該固体残留物から分離する工程と、
アルミニウム濃縮組成物を取得するために、pHを10以上にするために該浸出液と塩基を反応させ、鉄イオンの少なくとも一部を実質選択的に沈殿させ、該浸出液から該沈殿した鉄イオンの少なくとも一部を分離することにより、該浸出液中に含まれた鉄イオンの少なくとも一部を除去する工程
を具える、方法。 - アルミニウム鉱石からアルミニウムを抽出する方法であって、
浸出液と固体残留物を取得するために、該アルミニウム鉱石を酸で浸出する工程と、該浸出液を該固体残留物から分離する工程と、
アルミニウム濃縮組成物を取得するために、pHを10以上にするために該浸出液と塩基を反応させ、鉄イオンの少なくとも一部を実質選択的に沈殿させ、該浸出液から該沈殿した鉄イオンの少なくとも一部を分離することにより、該浸出液中に含まれた鉄イオンの少なくとも一部を除去する工程
不純物を含む酸性の水相と抽出剤と錯形成したアルミニウムイオンを含む有機相とを含む組成物を形成するために、有機溶媒及び酸性溶液の存在下で、該アルミニウムイオンと実質選択的に有機金属錯体を形成するのに適した抽出剤によって前記アルミニウム濃縮組成物を処理し、該水相を該有機相から分離することで、前記アルミニウム濃縮組成物中に存在する前記アルミニウムイオンを少なくとも部分的に回収する工程
を具える、方法。 - 前記水相のpHが2.5〜3.5であることを特徴とする請求項22に記載の方法。
- 前記抽出剤がホスフィン酸又はその誘導体であることを特徴とする請求項22又は23に記載の方法。
- 前記抽出剤がビス(2,4,4−トリメチルペンチル)ホスフィン酸であることを特徴とする請求項22又は23に記載の方法。
- 前記酸がHClであることを特徴とする請求項21〜25のいずれかに記載の方法。
- 前記塩基がKOH、NaOH、及びその混合物から選択されることを特徴とする請求項21〜26のいずれかに記載の方法。
- 前記鉄イオンの少なくとも一部を除去する際のpHが10.8〜11.2であることを特徴とする請求項21〜27のいずれかに記載の方法。
- 前記鉄イオンの少なくとも一部を除去する際のpHが11.5〜12.5であることを特徴とする請求項21〜27のいずれかに記載の方法。
- 80℃以上の温度でHClにより前記アルミニウム鉱石を浸出することを特徴とする請求項26に記載の方法。
- アルミナの製造方法であって、
請求項1〜30のいずれかに記載の手段によってアルミニウムイオンを取得し、該アルミニウムイオンをアルミナへ転化する方法。 - 800℃〜1200℃の温度でAl(OH)3を加熱することで、アルミニウムイオンをアルミナへ転化することを特徴とする請求項31に記載の方法。
- アルミニウムの製造方法であって、
請求項31又は32に記載の手段によってアルミナを取得し、該アルミナをアルミニウムへ転化する方法。
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US20120237418A1 (en) | 2012-09-20 |
US8241594B2 (en) | 2012-08-14 |
JP2010529289A (ja) | 2010-08-26 |
RU2009147266A (ru) | 2011-06-27 |
EP2155919A1 (en) | 2010-02-24 |
US20130052103A1 (en) | 2013-02-28 |
US20100150799A1 (en) | 2010-06-17 |
US8337789B2 (en) | 2012-12-25 |
AU2008253545A1 (en) | 2008-11-27 |
RU2012139837A (ru) | 2014-03-27 |
BRPI0811938A2 (pt) | 2014-11-25 |
US20110044869A1 (en) | 2011-02-24 |
US8597600B2 (en) | 2013-12-03 |
HK1147780A1 (en) | 2011-08-19 |
AU2008253545B2 (en) | 2012-04-12 |
CN102268559A (zh) | 2011-12-07 |
CA2684696A1 (en) | 2008-11-27 |
US20140065038A1 (en) | 2014-03-06 |
CA2684696C (en) | 2010-10-12 |
US7837961B2 (en) | 2010-11-23 |
EP2155919A4 (en) | 2015-11-04 |
RU2471010C2 (ru) | 2012-12-27 |
CN101842504A (zh) | 2010-09-22 |
WO2008141423A1 (en) | 2008-11-27 |
CN101842504B (zh) | 2012-11-14 |
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