GB1111681A - Improvements in or relating to the calcination of alumina - Google Patents
Improvements in or relating to the calcination of aluminaInfo
- Publication number
- GB1111681A GB1111681A GB4678/64A GB467864A GB1111681A GB 1111681 A GB1111681 A GB 1111681A GB 4678/64 A GB4678/64 A GB 4678/64A GB 467864 A GB467864 A GB 467864A GB 1111681 A GB1111681 A GB 1111681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alumina
- silica
- siliceous material
- particles
- mesh
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract 8
- 238000001354 calcination Methods 0.000 title abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 14
- 239000002245 particle Substances 0.000 abstract 7
- 239000000377 silicon dioxide Substances 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000741 silica gel Substances 0.000 abstract 1
- 229910002027 silica gel Inorganic materials 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
- C01F7/021—After-treatment of oxides or hydroxides
-
- 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
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
A method of calcining soda-containing alumina comprises incorporating in the alumina a proportion of silica or siliceous material capable of combining with soda at temperatures greater than 1100 DEG C. and fluidizing the mixture at a temperature greater than 1100 DEG C., but preferably not greater than 1450 DEG C. The silica or siliceous material may be incorporated in a ratio of 2 to 20% by weight of the alumina, and may be in the form of silica gel or sand. To permit separation of the particles of silica or siliceous material from the particle of alumina, the particles are arranged to have different particle sizes, e.g. 72 to 10 B.S. mesh for the silica or siliceous particles and 50 to 325 B.S. mesh for the alumina particles. The silica or siliceous material should preferably have a particle size larger than that of the alumina by at least 25 B.S. mesh. The mixture of alumina and silica or siliceous material may be fluidized with nitrogen and the bed heated electrically with an external graphite resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4678/64A GB1111681A (en) | 1964-08-04 | 1964-08-04 | Improvements in or relating to the calcination of alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4678/64A GB1111681A (en) | 1964-08-04 | 1964-08-04 | Improvements in or relating to the calcination of alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1111681A true GB1111681A (en) | 1968-05-01 |
Family
ID=9781719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4678/64A Expired GB1111681A (en) | 1964-08-04 | 1964-08-04 | Improvements in or relating to the calcination of alumina |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1111681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2375153A1 (en) * | 1976-12-22 | 1978-07-21 | Dynamit Nobel Ag | PROCESS FOR OBTAINING MOLTEN ELECTRO-CORUNDUM |
-
1964
- 1964-08-04 GB GB4678/64A patent/GB1111681A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2375153A1 (en) * | 1976-12-22 | 1978-07-21 | Dynamit Nobel Ag | PROCESS FOR OBTAINING MOLTEN ELECTRO-CORUNDUM |
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