GB330661A - Process for the preparation of alumina - Google Patents
Process for the preparation of aluminaInfo
- Publication number
- GB330661A GB330661A GB8931/29A GB893129A GB330661A GB 330661 A GB330661 A GB 330661A GB 8931/29 A GB8931/29 A GB 8931/29A GB 893129 A GB893129 A GB 893129A GB 330661 A GB330661 A GB 330661A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lye
- baumú
- bauxite
- treated
- pressure
- 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
- C01F7/04—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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
330,661. M³ller, W. J., and Hiller, H. March 19, 1929. Alumina; aluminates.-Bauxite is treated with aluminate lye of 20-22 BaumÚ at temperatures above 190 C., and at a pressure corresponding to the vapour pressure at this temperature. The mixture of alumina lye and bauxite may be kept in a continuously progressive movement through the decomposition autoclave by means of a high pressure pump, and allowed to issue from the reaction chamber through a loaded valve or through a corresponding counter-pressure pump. The red slime is separated from the reaction mixture, and the aluminium hydrate caused to separate in a manner known per se. In examples, using a bauxite from Salzburg, 96 per cent of the alumina present goes into solution when treated at 200 with a lye of 20 BaumÚ; using a Hungarian bauxite, 62 per cent goes into solution when treated with a 22 BaumÚ lye at 230 and an excess pressure of 25 atmospheres, and 93 per cent when treated at a temperature of 280-290 and at about 100 atmospheres pressure. In this process, no concentration of the aluminate lye is required at any period (except the concentration by evaporation of the wash liquors to 22 BaumÚ).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM106624D DE579114C (en) | 1927-09-21 | 1928-09-21 | Process for the production of alumina |
| GB8931/29A GB330661A (en) | 1929-03-19 | 1929-03-19 | Process for the preparation of alumina |
| US397442A US1826895A (en) | 1927-09-21 | 1929-10-04 | Process for the preparation of alumina |
| FR695586D FR695586A (en) | 1927-09-21 | 1930-05-14 | Process for the production of alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8931/29A GB330661A (en) | 1929-03-19 | 1929-03-19 | Process for the preparation of alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB330661A true GB330661A (en) | 1930-06-19 |
Family
ID=9862079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8931/29A Expired GB330661A (en) | 1927-09-21 | 1929-03-19 | Process for the preparation of alumina |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB330661A (en) |
-
1929
- 1929-03-19 GB GB8931/29A patent/GB330661A/en not_active Expired
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