CA2108785A1 - Method for the control of sodium oxalate levels in sodium aluminate solutions - Google Patents
Method for the control of sodium oxalate levels in sodium aluminate solutionsInfo
- Publication number
- CA2108785A1 CA2108785A1 CA2108785A CA2108785A CA2108785A1 CA 2108785 A1 CA2108785 A1 CA 2108785A1 CA 2108785 A CA2108785 A CA 2108785A CA 2108785 A CA2108785 A CA 2108785A CA 2108785 A1 CA2108785 A1 CA 2108785A1
- Authority
- CA
- Canada
- Prior art keywords
- sodium
- sodium oxalate
- oxalate
- concentration
- spheroidal
- 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.)
- Granted
Links
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 title abstract 11
- 229940039790 sodium oxalate Drugs 0.000 title abstract 11
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 title abstract 4
- 229910001388 sodium aluminate Inorganic materials 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- 239000002245 particle Substances 0.000 abstract 2
- 239000002244 precipitate Substances 0.000 abstract 2
- 238000004131 Bayer process Methods 0.000 abstract 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 229910001570 bauxite Inorganic materials 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- 229940039748 oxalate Drugs 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
Classifications
-
- 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
- C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
- C01F7/47—Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
- C01F7/473—Removal of organic compounds, e.g. sodium oxalate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A process is described for removing sodium oxalate from a sodium aluminate liquor produced through bauxite digestiol using the Bayer process. The novel sodium oxalate removal procedure comprises the steps of (a) continuously generating new and reactive seed particles of sodium oxalate by mixing together an aqueous solution of sodium oxalate and a portion of said Baye proccss sodium aluminate liquor to achieve a concentration of sodium oxalate within a range to generate spheroidal particles o sodium oxalate (b) adding a suspension of said spheroidal panicles of sodium oxalate as seed to a second portion of said Baye proccss sodium aluminate liquor, to thereby precipitate the remainder of dissolved sodium oxalate and (c) sepatining the sodiun oxalate precipitate, leaving a liquor of reduced sodium oxalate contamination. The spheroidal panicles are formed by controllin the concentration of sodium oxalate at a level about 5% to about 75% above autonucleation concentration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69525691A | 1991-05-03 | 1991-05-03 | |
| US695,256 | 1991-05-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2108785A1 true CA2108785A1 (en) | 1992-11-04 |
| CA2108785C CA2108785C (en) | 1998-06-16 |
Family
ID=24792272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002108785A Expired - Lifetime CA2108785C (en) | 1991-05-03 | 1992-05-01 | Method for the control of sodium oxalate levels in sodium aluminate solutions |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU650747B2 (en) |
| BR (1) | BR9205965A (en) |
| CA (1) | CA2108785C (en) |
| IE (1) | IE68425B1 (en) |
| WO (1) | WO1992019537A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2135538T3 (en) * | 1994-01-07 | 1999-11-01 | Alcan Int Ltd | A PROCEDURE FOR CRYSTALLIZATION TO SEPARATE IMPURITIES OF LIQUORS FROM THE BAYER PROCEDURE. |
| FR2794449B1 (en) * | 1999-06-04 | 2001-10-19 | Pechiney Aluminium | METHOD FOR PURIFYING SODIUM ALUMINATE LIQUORS CONTAINING SODIUM OXALATE FOR USE OF RESIDUES |
| CN112047366A (en) * | 2020-08-11 | 2020-12-08 | 中国铝业股份有限公司 | Method for removing sodium oxalate in alumina decomposition mother liquor by using scabs of decomposition tank |
| CN112939040A (en) * | 2021-03-31 | 2021-06-11 | 中铝集团山西交口兴华科技股份有限公司 | Method for removing sodium oxalate in production process of alumina and fine alumina |
| CN114408956B (en) * | 2022-01-07 | 2023-08-22 | 中铝山东有限公司 | Comprehensive carbon removal method and system for high-organic matter sodium aluminate solution |
| CN116282102B (en) * | 2022-11-29 | 2024-11-08 | 山西华兴铝业有限公司 | Method for adding seeds in organic matter removal process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2317226A1 (en) * | 1975-07-07 | 1977-02-04 | Alcan Res & Dev | IMPROVEMENTS IN ALUMINA PRODUCTION |
| JPS5456098A (en) * | 1977-10-12 | 1979-05-04 | Nippon Light Metal Co | Method of producing crude aluminum hydrate particles |
| US4263261A (en) * | 1978-12-21 | 1981-04-21 | Sumitomo Aluminium Smelting Company, Limited | Method for the removal of impurities from sodium aluminate solution |
| GB2211832A (en) * | 1987-10-30 | 1989-07-12 | Commw Scient Ind Res Org | Bayer process liquor purification |
| AU613758B2 (en) * | 1988-06-03 | 1991-08-08 | Vereinigte Aluminium-Werke Aktiengesellschaft | Method for removing sodium oxalate from caustic aluminate liquors |
-
1992
- 1992-05-01 CA CA002108785A patent/CA2108785C/en not_active Expired - Lifetime
- 1992-05-01 BR BR9205965A patent/BR9205965A/en not_active IP Right Cessation
- 1992-05-01 WO PCT/CA1992/000188 patent/WO1992019537A1/en not_active Ceased
- 1992-05-01 AU AU16642/92A patent/AU650747B2/en not_active Expired
- 1992-07-01 IE IE921423A patent/IE68425B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IE921423A1 (en) | 1992-11-04 |
| BR9205965A (en) | 1995-03-01 |
| IE68425B1 (en) | 1996-06-12 |
| AU650747B2 (en) | 1994-06-30 |
| CA2108785C (en) | 1998-06-16 |
| AU1664292A (en) | 1992-12-21 |
| WO1992019537A1 (en) | 1992-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |