JP4975431B2 - 硫化アルミニウムの電解方法 - Google Patents
硫化アルミニウムの電解方法 Download PDFInfo
- Publication number
- JP4975431B2 JP4975431B2 JP2006505009A JP2006505009A JP4975431B2 JP 4975431 B2 JP4975431 B2 JP 4975431B2 JP 2006505009 A JP2006505009 A JP 2006505009A JP 2006505009 A JP2006505009 A JP 2006505009A JP 4975431 B2 JP4975431 B2 JP 4975431B2
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- JP
- Japan
- Prior art keywords
- bath
- cryolite
- electrolysis
- nacl
- molten
- 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.)
- Expired - Fee Related
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/18—Electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Description
カソード Al3++3e−→Al (1)
アノード 2S2−→S2(g)+4e− (2)
全体的 Al2S3→2Al+1.5S2(g) (3)
E0=分解電位
ΔG0=Gibbsの自由エネルギー
n=イオンの原子価(アルミニウムに関しては3)
F=Faraday定数
である。
MgCl2+Al2S3→2AlSCl+MgS(s) (5)
S2−→S+2e−(電気化学的2電子プロセス) (6)
S+S→S2(硫黄原子のS2への二量体化) (7)
AlCl3+Al2S3→3AlSCl
・電流密度対セル電位の関係の勾配は、氷晶石をMgCl2−NaCl−KCl共融物に加えることにより、約3倍増加するが、これは、電導度増加から予想されるよりもはるかに大きい。
・NaFの比電導度ははるかに高いにも関わらず、氷晶石10重量%を加えることにより、NaFの添加より、見掛け電導度が大きく改良される。
・電解質中の、最適なフッ化物の量、またはフッ化物とアルミニウムの比があるようである。
実験 Al2S3 融剤 融剤の量
(重量%)
A 4 − −
B 4 − −
C 4 Na3AlF6 10
D 10 Na3AlF6 10
E 4 Na3AlF6 5
F 4 Na3AlF6 15
G 4 Na3AlF6 20
H 4 Na3AlF6 30
K 4 NaF 10
L 4 NaF 30
Claims (13)
- Al2S3が溶解している溶融塩化物塩の浴を使用する、Al2S3の電解による第一アルミニウムの製造方法であって、前記溶融塩化物塩がMgCl 2 −NaCl−KCl混合物であり、前記浴中の電流密度を増加することができるように、フッ化物化合物を含んでなる添加剤を前記浴に加える、方法。
- 前記添加剤が、主としてフッ化物化合物からなる、請求項1に記載の方法。
- 前記フッ化物化合物が、氷晶石である、請求項1または2に記載の方法。
- 前記氷晶石の濃度が5〜30重量%である、請求項3に記載の方法。
- 前記氷晶石の濃度が7〜15重量%である、請求項3に記載の方法。
- 前記氷晶石の濃度が約10重量%である、請求項3に記載の方法。
- 前記浴中に伸びるアノードの有効面積が、前記アノードを覆う気泡の量および/または大きさを下げることにより、高められる、請求項1〜6のいずれか一項に記載の方法。
- 前記溶融塩化物塩の浴が、主としてアルカリ金属塩化物を含んでなる、請求項1〜7のいずれか一項に記載の方法。
- 前記溶融塩化物塩の浴が、主としてKClおよびNaClを含んでなる、請求項1〜7のいずれか一項に記載の方法。
- 前記溶融金属の浴が、アルカリ土類塩化物を実質的に含まない、請求項1〜9のいずれか一項に記載の方法。
- 前記電解が、600℃〜850℃の浴温度で行われる、請求項1〜10のいずれか一項に記載の方法。
- 前記電解が、700℃〜800℃の浴温度で行われる、請求項1〜10のいずれか一項に記載の方法。
- 前記電解が、多極電解セル中で行われる、請求項1〜12のいずれか一項に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03075948 | 2003-03-31 | ||
EP03075948.4 | 2003-03-31 | ||
PCT/EP2004/003625 WO2004088000A2 (en) | 2003-03-31 | 2004-03-31 | Process for the electrolysis of aluminiumsulfide |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006522220A JP2006522220A (ja) | 2006-09-28 |
JP2006522220A5 JP2006522220A5 (ja) | 2011-09-08 |
JP4975431B2 true JP4975431B2 (ja) | 2012-07-11 |
Family
ID=33104133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006505009A Expired - Fee Related JP4975431B2 (ja) | 2003-03-31 | 2004-03-31 | 硫化アルミニウムの電解方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20080202939A1 (ja) |
EP (1) | EP1625245A2 (ja) |
JP (1) | JP4975431B2 (ja) |
AU (1) | AU2004225794B8 (ja) |
CA (1) | CA2520798C (ja) |
NO (1) | NO20055027L (ja) |
RU (1) | RU2341591C2 (ja) |
WO (1) | WO2004088000A2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE466974T1 (de) * | 2005-03-31 | 2010-05-15 | Aleris Aluminum Koblenz Gmbh | Verfahren und vorrichtung zur produktion von aluminium |
US7867373B2 (en) | 2005-04-01 | 2011-01-11 | Aleris Aluminum Koblenz Gmbh | Method and apparatus for the production of aluminum |
KR101290586B1 (ko) * | 2012-04-25 | 2013-07-30 | 한국수력원자력 주식회사 | 사용후 핵연료의 폐 피복관 제염 방법 및 그 장치 |
JP2014237873A (ja) * | 2013-06-07 | 2014-12-18 | 住友電気工業株式会社 | 溶融塩の製造方法、溶融塩及びアルミニウムの製造方法 |
CN105473766B (zh) * | 2013-07-09 | 2018-02-02 | 俄铝工程技术中心有限责任公司 | 用于使用铝电解器获得熔体的电解质 |
WO2019094921A1 (en) * | 2017-11-13 | 2019-05-16 | Chromalox, Inc. | Medium voltage molten salt heater and molten salt thermal energy storage system including same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB484014A (en) * | 1936-12-04 | 1938-04-29 | Daniel Gardner | Improvements in or relating to electrolytic processes for the manufacture of aluminium |
US2939824A (en) * | 1957-07-26 | 1960-06-07 | Kaiser Aluminium Chem Corp | Method and apparatus for the production of aluminum |
US4133727A (en) * | 1977-05-17 | 1979-01-09 | Aluminum Company Of America | Method for extracting heat from a chamber containing a molten salt |
JPS54114410A (en) * | 1978-02-27 | 1979-09-06 | Shirou Yoshizawa | Production of metal aluminium |
US4265716A (en) * | 1979-06-14 | 1981-05-05 | The United States Of America As Represented By The United States Department Of Energy | Method of winning aluminum metal from aluminous ore |
US4464234A (en) * | 1982-04-01 | 1984-08-07 | The United States Of America As Represented By The United States Department Of Energy | Production of aluminum metal by electrolysis of aluminum sulfide |
DE3412114A1 (de) * | 1984-03-31 | 1985-10-10 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zur herstellung von aluminium |
EP1141425B1 (en) * | 1998-12-18 | 2005-10-05 | Corus Technology BV | Method for the production of aluminium from alumina by aluminium sulfide process |
-
2004
- 2004-03-31 EP EP04724605A patent/EP1625245A2/en not_active Withdrawn
- 2004-03-31 JP JP2006505009A patent/JP4975431B2/ja not_active Expired - Fee Related
- 2004-03-31 AU AU2004225794A patent/AU2004225794B8/en not_active Ceased
- 2004-03-31 RU RU2005133440/02A patent/RU2341591C2/ru not_active IP Right Cessation
- 2004-03-31 WO PCT/EP2004/003625 patent/WO2004088000A2/en active Application Filing
- 2004-03-31 CA CA002520798A patent/CA2520798C/en not_active Expired - Fee Related
- 2004-03-31 US US10/550,678 patent/US20080202939A1/en not_active Abandoned
-
2005
- 2005-10-28 NO NO20055027A patent/NO20055027L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2004088000A3 (en) | 2005-01-13 |
AU2004225794B2 (en) | 2009-08-20 |
US20080202939A1 (en) | 2008-08-28 |
AU2004225794B8 (en) | 2009-10-22 |
AU2004225794A1 (en) | 2004-10-14 |
RU2341591C2 (ru) | 2008-12-20 |
AU2004225794A8 (en) | 2009-10-22 |
EP1625245A2 (en) | 2006-02-15 |
CA2520798A1 (en) | 2004-10-14 |
JP2006522220A (ja) | 2006-09-28 |
CA2520798C (en) | 2009-06-16 |
WO2004088000A2 (en) | 2004-10-14 |
NO20055027L (no) | 2005-10-28 |
RU2005133440A (ru) | 2006-06-10 |
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