FR2020340A1 - Recovery of alumina from bauxites - Google Patents
Recovery of alumina from bauxitesInfo
- Publication number
- FR2020340A1 FR2020340A1 FR6934721A FR6934721A FR2020340A1 FR 2020340 A1 FR2020340 A1 FR 2020340A1 FR 6934721 A FR6934721 A FR 6934721A FR 6934721 A FR6934721 A FR 6934721A FR 2020340 A1 FR2020340 A1 FR 2020340A1
- Authority
- FR
- France
- Prior art keywords
- sodium
- bauxites
- alumina
- recovery
- cancrinite
- 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.)
- Withdrawn
Links
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
-
- 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
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/062—Digestion
- C01F7/0633—Digestion characterised by the use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Nutrition Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Sodium aluminate solutions are desilicated by adding to them a finely divided synthetic cancrinite which makes it possible for the silicon to be precipitated from the solution as a silicate complex of sodium and aluminium. The sodium aluminate may be a digestion liquor of the Bayer process. The finely divided synthetic cancrinite may include in its crystalline structure sodium sulphate, nitrate, oxalate, phosphate or carbonate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76706168A | 1968-10-10 | 1968-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2020340A1 true FR2020340A1 (en) | 1970-07-10 |
Family
ID=25078365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6934721A Withdrawn FR2020340A1 (en) | 1968-10-10 | 1969-10-10 | Recovery of alumina from bauxites |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2020340A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992003381A1 (en) * | 1990-08-17 | 1992-03-05 | Alcan International Limited | Desilication of bayer process solutions |
WO1999067172A1 (en) * | 1998-06-19 | 1999-12-29 | Alcan International Limited | Process for the removal of silica from an alkaline solution containing sodium aluminate |
WO2010071393A1 (en) * | 2008-12-17 | 2010-06-24 | Instituto Mexicano Del Petróleo | Non-destructive process for eliminating silicon from alumina-based materials |
US12006225B2 (en) | 2018-02-23 | 2024-06-11 | Rio Tinto Alcan International Limited | Bayer process |
-
1969
- 1969-10-10 FR FR6934721A patent/FR2020340A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992003381A1 (en) * | 1990-08-17 | 1992-03-05 | Alcan International Limited | Desilication of bayer process solutions |
WO1999067172A1 (en) * | 1998-06-19 | 1999-12-29 | Alcan International Limited | Process for the removal of silica from an alkaline solution containing sodium aluminate |
US6086834A (en) * | 1998-06-19 | 2000-07-11 | Alcan International Limited | Process for the removal of silica from an alkaline solution containing sodium aluminate |
AU750520B2 (en) * | 1998-06-19 | 2002-07-18 | Alcan International Limited | Process for the removal of silica from an alkaline solution containing sodium aluminate |
WO2010071393A1 (en) * | 2008-12-17 | 2010-06-24 | Instituto Mexicano Del Petróleo | Non-destructive process for eliminating silicon from alumina-based materials |
US8716159B2 (en) | 2008-12-17 | 2014-05-06 | Instituto Mexicano Del Petroleo | Non-destructive process for the elimination of silicon from alumina based materials |
US12006225B2 (en) | 2018-02-23 | 2024-06-11 | Rio Tinto Alcan International Limited | Bayer process |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Withdrawal of published application |