GB858026A - Improvements in or relating to the manufacture of alumina - Google Patents
Improvements in or relating to the manufacture of aluminaInfo
- Publication number
- GB858026A GB858026A GB3922357A GB3922357A GB858026A GB 858026 A GB858026 A GB 858026A GB 3922357 A GB3922357 A GB 3922357A GB 3922357 A GB3922357 A GB 3922357A GB 858026 A GB858026 A GB 858026A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- acid
- precipitate
- hydroxide
- alumina
- 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
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
- C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/18—Aluminium oxide or hydroxide from alkaline earth metal aluminates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Aluminium hydroxide is recovered from solutions obtained by treating clays containing both aluminium and iron with acid, for example sulphuric acid, by filtering off the clay and treating the filtrate with calcium hydroxide to give a pH of 9.5 to 10.5, to precipitate the iron as ferrous hydroxide and to have a solution of monocalcium aluminate. This solution is filtered to remove the precipitate, which, if sulphuric acid was employed, will also contain calcium sulphate, and the filtrate is treated with an alkali-metal carbonate to precipitate calcium carbonate and have a solution of alkali metal aluminate. This solution is filtered and treated with carbon dioxide to precipitate aluminium hydroxide, which is recovered, and may be converted to alumina by heating. The initial solution may be that formed in the acid activation of clay, for example, the activation of smectites, especially the montmorillonites, with a mineral acid, e.g. sulphuric or hydrochloric acid, normally at above 90 DEG C. for 1/2 -24 hours, to give bleaching clays. Preferably the solution has a temperature of 15-90 DEG C., especially 75-85 DEG C., when the calcium hydroxide is added, and the solution is filtered within 10 minutes of this addition. The initial solution preferably has a concentration of not more than 0.04% aluminium. The precipitated calcium carbonate may be converted to calcium oxide and carbon dioxide to be re-used in the process. The aluminium hydroxide is converted to gamma-alumina on heating. Prolonged heating at above 1000 DEG C. will convert the gammato alpha-alumina.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3922357A GB858026A (en) | 1957-12-17 | 1957-12-17 | Improvements in or relating to the manufacture of alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3922357A GB858026A (en) | 1957-12-17 | 1957-12-17 | Improvements in or relating to the manufacture of alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB858026A true GB858026A (en) | 1961-01-04 |
Family
ID=10408365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3922357A Expired GB858026A (en) | 1957-12-17 | 1957-12-17 | Improvements in or relating to the manufacture of alumina |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB858026A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8241594B2 (en) | 2007-05-21 | 2012-08-14 | Orbite Aluminae Inc. | Processes for extracting aluminum and iron from aluminous ores |
| US9023301B2 (en) | 2012-01-10 | 2015-05-05 | Orbite Aluminae Inc. | Processes for treating red mud |
| US9150428B2 (en) | 2011-06-03 | 2015-10-06 | Orbite Aluminae Inc. | Methods for separating iron ions from aluminum ions |
| US9181603B2 (en) | 2012-03-29 | 2015-11-10 | Orbite Technologies Inc. | Processes for treating fly ashes |
| US9260767B2 (en) | 2011-03-18 | 2016-02-16 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9290828B2 (en) | 2012-07-12 | 2016-03-22 | Orbite Technologies Inc. | Processes for preparing titanium oxide and various other products |
| US9353425B2 (en) | 2012-09-26 | 2016-05-31 | Orbite Technologies Inc. | Processes for preparing alumina and magnesium chloride by HCl leaching of various materials |
| US9382600B2 (en) | 2011-09-16 | 2016-07-05 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US9410227B2 (en) | 2011-05-04 | 2016-08-09 | Orbite Technologies Inc. | Processes for recovering rare earth elements from various ores |
| US9534274B2 (en) | 2012-11-14 | 2017-01-03 | Orbite Technologies Inc. | Methods for purifying aluminium ions |
-
1957
- 1957-12-17 GB GB3922357A patent/GB858026A/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8241594B2 (en) | 2007-05-21 | 2012-08-14 | Orbite Aluminae Inc. | Processes for extracting aluminum and iron from aluminous ores |
| US8337789B2 (en) | 2007-05-21 | 2012-12-25 | Orsite Aluminae Inc. | Processes for extracting aluminum from aluminous ores |
| US8597600B2 (en) | 2007-05-21 | 2013-12-03 | Orbite Aluminae Inc. | Processes for extracting aluminum from aluminous ores |
| US9945009B2 (en) | 2011-03-18 | 2018-04-17 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9260767B2 (en) | 2011-03-18 | 2016-02-16 | Orbite Technologies Inc. | Processes for recovering rare earth elements from aluminum-bearing materials |
| US9410227B2 (en) | 2011-05-04 | 2016-08-09 | Orbite Technologies Inc. | Processes for recovering rare earth elements from various ores |
| US9150428B2 (en) | 2011-06-03 | 2015-10-06 | Orbite Aluminae Inc. | Methods for separating iron ions from aluminum ions |
| US9382600B2 (en) | 2011-09-16 | 2016-07-05 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US10174402B2 (en) | 2011-09-16 | 2019-01-08 | Orbite Technologies Inc. | Processes for preparing alumina and various other products |
| US9556500B2 (en) | 2012-01-10 | 2017-01-31 | Orbite Technologies Inc. | Processes for treating red mud |
| US9023301B2 (en) | 2012-01-10 | 2015-05-05 | Orbite Aluminae Inc. | Processes for treating red mud |
| US9181603B2 (en) | 2012-03-29 | 2015-11-10 | Orbite Technologies Inc. | Processes for treating fly ashes |
| US9290828B2 (en) | 2012-07-12 | 2016-03-22 | Orbite Technologies Inc. | Processes for preparing titanium oxide and various other products |
| US9353425B2 (en) | 2012-09-26 | 2016-05-31 | Orbite Technologies Inc. | Processes for preparing alumina and magnesium chloride by HCl leaching of various materials |
| US9534274B2 (en) | 2012-11-14 | 2017-01-03 | Orbite Technologies Inc. | Methods for purifying aluminium ions |
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