GB283509A - Improvements in process for the preparation of alumina - Google Patents
Improvements in process for the preparation of aluminaInfo
- Publication number
- GB283509A GB283509A GB998/28A GB99828A GB283509A GB 283509 A GB283509 A GB 283509A GB 998/28 A GB998/28 A GB 998/28A GB 99828 A GB99828 A GB 99828A GB 283509 A GB283509 A GB 283509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminate
- alumina
- addition
- calcium
- base
- 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
- C01F7/164—Calcium 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
283,509. Seailles, J. C. Jan. 11, 1927, [Convention date]. Addition to 277,697. Alumina; sodium and calcium aluminates.-An hydrated alkaline earth aluminate is prepared, as in the parent Specification, by treating a mixture of non-halogenated aluminium one and an alkaline earth base with hot or cold water under normal or increased pressure, but in the ratio of at least four molecules of base to one of alumina, and preferably with an additional two or three molecules of base for one of silica in the ore. The mixture is treated in a colloidal grinding machine, preferably in an autoclave under pressure. Bv addition of more alkaline earth base (lime) and prolonging the treatment, more silica is withdrawn as insoluble calcium silicate and silico-aluminate. Calcium aluminate formed is washed to separate most of the lime, and then treated with caustic soda and preferably carbon dioxide, forming sodium aluminate and calcium carbonate. After addition of excess caustc soda, the solution of sodium aluminate is withdrawn, and alumina precipitated by addition of crystallized alumina. The weaker remaining solution of sodium aluminate is used for leaching further calcium aluminate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR634430T | 1926-09-18 | ||
| FR33485T | 1927-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB283509A true GB283509A (en) | 1928-06-21 |
Family
ID=26182637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB998/28A Expired GB283509A (en) | 1926-09-18 | 1928-01-11 | Improvements in process for the preparation of alumina |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE564059C (en) |
| FR (1) | FR33485E (en) |
| GB (1) | GB283509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3357792A (en) * | 1966-10-03 | 1967-12-12 | Gebefugi Istvan | Kneading pretreatment for the production of aluminum hydroxide |
-
1927
- 1927-01-11 FR FR33485D patent/FR33485E/en not_active Expired
- 1927-02-26 DE DES78555D patent/DE564059C/en not_active Expired
-
1928
- 1928-01-11 GB GB998/28A patent/GB283509A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3357792A (en) * | 1966-10-03 | 1967-12-12 | Gebefugi Istvan | Kneading pretreatment for the production of aluminum hydroxide |
Also Published As
| Publication number | Publication date |
|---|---|
| DE564059C (en) | 1932-11-12 |
| FR33485E (en) | 1928-09-28 |
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