GB427526A - Improvements in the manufacture and production of magnesia and nitrogenous fertilisers from dolomite - Google Patents
Improvements in the manufacture and production of magnesia and nitrogenous fertilisers from dolomiteInfo
- Publication number
- GB427526A GB427526A GB26300/34A GB2630034A GB427526A GB 427526 A GB427526 A GB 427526A GB 26300/34 A GB26300/34 A GB 26300/34A GB 2630034 A GB2630034 A GB 2630034A GB 427526 A GB427526 A GB 427526A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonia
- fertilizer
- dolomite
- evaporated
- magnesia
- 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
- C01F5/20—Magnesium hydroxide by precipitation from solutions of magnesium salts with ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Magnesia and nitrogenous fertilizers are obtained from dolomite by dissolving the dolomite in nitric acid, precipitating magnesium hydroxide from the solution with ammonia, separating the precipitate by filtration and converting it into magnesia and converting the filtrate into a fertilizer. The ammoniacal filtrate may be evaporated to obtain a fertilizer containing ammonium and calcium nitrates or may be treated with carbonic acid, say that obtained in the initial dissolution of the dolomite, to obtain calcium carbonate and ammonium nitrate which may be either separated or evaporated together to form a fertilizer. The amount of ammonia added may be restricted so that the fertilizer obtained contains magnesium nitrate. The ammonia may be added in the gaseous or aqueous form preferably with cooling to a temperature below 20 DEG C. The magnesia may be obtained free from iron by adding sufficient ammonia to precipitate ferric hydroxide which is filtered off before the further addition of ammonia. The ammoniacal filtrate may be evaporated at 140 DEG C., and solidified during cooling and stirring to form crystallinc granules. Specification 403,054 is referred to.ALSO:Nitrogenous fertilizers are obtained from dolomite by dissolving the dolomite in nitric acid, precipitating magnesium hydroxide from the solution with ammonia, separating the precipitate by filtration and converting it into magnesia and converting the filtrate into a fertilizer. The ammoniacal filtrate may be evaporated to obtain a fertilizer containing ammonium and calcium nitrates or may be treated with carbonic acid, say that obtained in the initial dissolution of the dolomite, to obtain calcium carbonate and ammonium nitrate which may be evaporated together to form a fertilizer. The amount of ammonia added may be restricted so that the fertilizer obtained contains magnesium nitrate. The ammonia may be added in the gaseous or aqueous form preferably with cooling to a temperature below 20 DEG C. The ammoniacal filtrate may be evaporated at 140 DEG C., and solidified during cooling and stirring to form crystalline granules. Specification 403,054, [Group III], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE427526X | 1933-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB427526A true GB427526A (en) | 1935-04-25 |
Family
ID=6477323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26300/34A Expired GB427526A (en) | 1933-10-02 | 1934-09-13 | Improvements in the manufacture and production of magnesia and nitrogenous fertilisers from dolomite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB427526A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE966806C (en) * | 1952-06-19 | 1957-09-12 | Dr Otto Kippe | Process for the production of nitrogenous fertilizers with simultaneous production of magnesia or magnesium hydroxide |
| CN111204779A (en) * | 2020-03-10 | 2020-05-29 | 余荣华 | Fused salt production method for co-producing high-purity magnesium hydroxide, magnesium carbonate and nitrogen-potassium fertilizer |
| CN113233480A (en) * | 2021-06-29 | 2021-08-10 | 郭建文 | Magnesium refining slag recovery equipment and recovery process thereof |
-
1934
- 1934-09-13 GB GB26300/34A patent/GB427526A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE966806C (en) * | 1952-06-19 | 1957-09-12 | Dr Otto Kippe | Process for the production of nitrogenous fertilizers with simultaneous production of magnesia or magnesium hydroxide |
| CN111204779A (en) * | 2020-03-10 | 2020-05-29 | 余荣华 | Fused salt production method for co-producing high-purity magnesium hydroxide, magnesium carbonate and nitrogen-potassium fertilizer |
| CN113233480A (en) * | 2021-06-29 | 2021-08-10 | 郭建文 | Magnesium refining slag recovery equipment and recovery process thereof |
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