GB471234A - Improvements in process for obtaining mgo and caco from dolomitic materials - Google Patents
Improvements in process for obtaining mgo and caco from dolomitic materialsInfo
- Publication number
- GB471234A GB471234A GB34037/36A GB3403736A GB471234A GB 471234 A GB471234 A GB 471234A GB 34037/36 A GB34037/36 A GB 34037/36A GB 3403736 A GB3403736 A GB 3403736A GB 471234 A GB471234 A GB 471234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- salt solution
- magnesium
- calcium
- mgo
- magnesium salt
- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
-
- 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
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
In the treatment of an oxide calcine containing a mixture of CaO and MgO with a readily soluble magnesium salt solution such as the chloride, nitrate, or acetate to obtain a calcium salt solution and magnesium oxide, slightly, say 1 per cent, less magnesium salt solution is used than is theoretically necessary so that the final calcium product (CaCO3) may be free of magnesium and fluorine. A fraction, say \ba1/8\be, of the magnesium salt solution is first added to convert the CaO present to Ca(OH)2 and the remainder then added to effect the main reaction which is promoted by agitation. After separation of solids the calcium salt solution is treated with NH3 and CO2 or ammonium carbonate using slight excess of NH3 to precipitate calcium carbonate and obtain an ammonium salt solution which is then reacted with the said solids at an elevated temperature to recover ammonia and magnesium salt solution for reuse, and give as solid end product the MgO derived from the calcine. A flow sheet for the process is given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US471234XA | 1935-12-11 | 1935-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB471234A true GB471234A (en) | 1937-08-31 |
Family
ID=21947184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34037/36A Expired GB471234A (en) | 1935-12-11 | 1936-12-11 | Improvements in process for obtaining mgo and caco from dolomitic materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB471234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182931A1 (en) * | 1984-11-27 | 1986-06-04 | GebràDer Sulzer Aktiengesellschaft | Process for the preparation of very pure magnesium oxide |
-
1936
- 1936-12-11 GB GB34037/36A patent/GB471234A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182931A1 (en) * | 1984-11-27 | 1986-06-04 | GebràDer Sulzer Aktiengesellschaft | Process for the preparation of very pure magnesium oxide |
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