GB626503A - Process for preparing light magnesium hydroxide - Google Patents
Process for preparing light magnesium hydroxideInfo
- Publication number
- GB626503A GB626503A GB3479146A GB3479146A GB626503A GB 626503 A GB626503 A GB 626503A GB 3479146 A GB3479146 A GB 3479146A GB 3479146 A GB3479146 A GB 3479146A GB 626503 A GB626503 A GB 626503A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnesium hydroxide
- pressure
- heated
- vessel
- temperature
- 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
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
Abstract
Light magnesium hydroxide in powder form is produced by mixing moist magnesium hydroxide precipitated from aqueous solution with a hydroxylic liquid, e.g. water and/or methyl, ethyl, isopropyl, &c., alcohol, mixture of alcohols or methylated spirits, heating the mixture to within say 50 DEG C. above or below the critical temperature, and reducing the pressure while avoiding a fall in temperature of more than 30 DEG C. The magnesium hydroxide employed may be obtained from solutions of magnesium salts and strong alkali or ammonia, or from sea water and lime or dolomitic lime. 10-30 parts hydroxylic liquid to one part magnesium hydroxide (reckoned on the dry material), are suitable. The process may be effected batch-wise, or the suspension may be pumped intermittently into a heated pressure vessel, and drawn intermittently into a second heated pressure vessel in which the pressure is released; alternatively, it may be pumped into a vessel or through a coil wherein it is heated to near the critical temperature, the pressure being maintained by regulated withdrawal into a vessel at atmospheric pressure and heated to a temperature near the critical temperature of the liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3479146A GB626503A (en) | 1946-11-23 | 1946-11-23 | Process for preparing light magnesium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3479146A GB626503A (en) | 1946-11-23 | 1946-11-23 | Process for preparing light magnesium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB626503A true GB626503A (en) | 1949-07-15 |
Family
ID=10369984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3479146A Expired GB626503A (en) | 1946-11-23 | 1946-11-23 | Process for preparing light magnesium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB626503A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3508869A (en) * | 1966-11-04 | 1970-04-28 | Dow Chemical Co | Novel crystalline mg(oh)2 and mgo and methods of preparation |
| US4145404A (en) * | 1975-05-30 | 1979-03-20 | Kyowa Chemical Industry Co., Ltd. | Magnesium hydroxides having novel structure, process for production thereof, and resin compositions containing them |
-
1946
- 1946-11-23 GB GB3479146A patent/GB626503A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3508869A (en) * | 1966-11-04 | 1970-04-28 | Dow Chemical Co | Novel crystalline mg(oh)2 and mgo and methods of preparation |
| US4145404A (en) * | 1975-05-30 | 1979-03-20 | Kyowa Chemical Industry Co., Ltd. | Magnesium hydroxides having novel structure, process for production thereof, and resin compositions containing them |
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