GB939216A - Process for the production of alumina - Google Patents
Process for the production of aluminaInfo
- Publication number
- GB939216A GB939216A GB978560A GB978560A GB939216A GB 939216 A GB939216 A GB 939216A GB 978560 A GB978560 A GB 978560A GB 978560 A GB978560 A GB 978560A GB 939216 A GB939216 A GB 939216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium
- solution
- sulphate
- aluminium
- precipitate
- 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
- C01F7/20—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts
- C01F7/26—Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with sulfuric acids or sulfates
Abstract
In the production of alumina a silico-aluminous ore is roasted with ammonium sulphate, the roasted ore is lixiviated, the resulting solution is decanted and filtered, aluminium ammonium sulphate obtained from the solution is purified by removing iron and titanium salts and silica, and alumina is precipitated from a solution of the purified aluminium ammonium sulphate by means of ammonium hydroxide or sulphide. The solution resulting from lixiviation is cooled with agitation, after the addition of further ammonium sulphate if required, to crystallize out the aluminium ammonium sulphate leaving most of the iron and titanium impurities in solution. The crystals are redissolved in water and ammonium ferrocyanide and copper sulphate added to precipitate iron, which is filtered off, and the filtrate cooled to crystallize the aluminium ammonium sulphate. The crystals are melted in their water of crystallization, zinc sulphate is added to precipitate any remaining silica, the melt is separated from insoluble residue and reacted with ammonium hydroxide solution or ammonium sulphide, causing aluminium hydroxide to precipitate, and finally the precipitate is calcined. An example is given. Specification 737,904 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB978560A GB939216A (en) | 1960-03-18 | 1960-03-18 | Process for the production of alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB978560A GB939216A (en) | 1960-03-18 | 1960-03-18 | Process for the production of alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB939216A true GB939216A (en) | 1963-10-09 |
Family
ID=9878720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB978560A Expired GB939216A (en) | 1960-03-18 | 1960-03-18 | Process for the production of alumina |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB939216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413981C (en) * | 2006-09-14 | 2008-08-27 | 北京矿冶研究总院 | Method for extracting aluminum from high-silicon aluminum-containing mineral raw material by acid process |
-
1960
- 1960-03-18 GB GB978560A patent/GB939216A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413981C (en) * | 2006-09-14 | 2008-08-27 | 北京矿冶研究总院 | Method for extracting aluminum from high-silicon aluminum-containing mineral raw material by acid process |
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