GB383434A - Process for the preparation of a mixed fertiliser containing easily assimilable phosphates and nitrogen - Google Patents
Process for the preparation of a mixed fertiliser containing easily assimilable phosphates and nitrogenInfo
- Publication number
- GB383434A GB383434A GB32885/31A GB3288531A GB383434A GB 383434 A GB383434 A GB 383434A GB 32885/31 A GB32885/31 A GB 32885/31A GB 3288531 A GB3288531 A GB 3288531A GB 383434 A GB383434 A GB 383434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonia
- products
- reaction
- solid
- molecules
- 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/06—Ammoniation of superphosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Fertilizers are prepared by treating solid mineral acid decomposition products of raw mineral phosphates with concentrated ammonia in countercurrent at above 75 DEG C., the water evaporated by the reaction being prevented from condensing in the decomposition products or in the ammonia reaction products obtained therefrom which have absorbed less ammonia than 1-2 molecules of ammonia per molecule of phosphoric acid. The water vapour produced by the reaction may be wholly or partially condensed in such reaction products as contain ammonia in the ratio of approximately 2 molecules of ammonia to 1 molecule of phosphoric acid. The product may be completely saturated with ammonia. The process may be carried out in a rotary drum having means for feeding in the solid decomposition products at one end and ammonia at the other, a cooling tube extends half-way along the drum from the end at which the solid products enter and underneath this is a gutter or channel in which the condensed water is collected and removed, e.g. into contact with such products as have absorbed approximately 2 molecules of ammonia per molecule of phosphoric acid. Alternatively the treatment with concentrated ammonia in countercurrent at above 75 DEG C. may be carried out so that the main reaction with ammonia takes place as close as possible to the place of entry of the solid decomposition products into the apparatus, an excess of ammonia being used.ALSO:Fertilizers are prepared by treating solid mineral acid decomposition products of raw mineral phosphates with concentrated ammonia in counter current at above 75 DEG C., the water evaporated by the reaction being prevented from condensing in the decomposition products or in the ammonia reaction products obtained therefrom which have absorbed less ammonia than 1-2 molecules of ammonia per molecule of phosphoric acid. The water vapour produced by the reaction may be wholly or partially condensed in such reaction products as contain ammonia in the ratio of approximately 2 molecules of ammonia to 1 molecule of phosphoric acid. The product may be completely saturated with ammonia. The process may be carried out in a rotary drum having means for feeding in the solid decomposition products at one end and ammonia at the other; a cooling tube extends half-way along the drum from the end at which the solid products enter and underneath this is a gutter or channel in which the condensed water is collected and removed, e.g. into contact with such products as have absorbed approximately 2 molecules of ammonia per molecule of phosphoric acid. Alternatively the treatment with concentrated ammonia in counter current at above 75 DEG C. may be carried out so that the main reaction with ammonia takes place as close as possible to the place of entry of the solid decomposition products into the apparatus, an excess of ammonia being used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE383434X | 1930-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB383434A true GB383434A (en) | 1932-11-17 |
Family
ID=6364711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32885/31A Expired GB383434A (en) | 1930-11-28 | 1931-11-27 | Process for the preparation of a mixed fertiliser containing easily assimilable phosphates and nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB383434A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2653079A (en) * | 1948-06-10 | 1953-09-22 | Degussa | Process for the preparation of chlorine dioxide |
| US2707676A (en) * | 1952-02-06 | 1955-05-03 | Saint Gobain | Manufacture of phosphonitrite fertilizers |
-
1931
- 1931-11-27 GB GB32885/31A patent/GB383434A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2653079A (en) * | 1948-06-10 | 1953-09-22 | Degussa | Process for the preparation of chlorine dioxide |
| US2707676A (en) * | 1952-02-06 | 1955-05-03 | Saint Gobain | Manufacture of phosphonitrite fertilizers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1856187A (en) | Process of producing calcium nitrate and ammonium salts from phosphate rock and like phosphate material | |
| GB383434A (en) | Process for the preparation of a mixed fertiliser containing easily assimilable phosphates and nitrogen | |
| US1924041A (en) | Process of manufacturing alpha product containing ammonium nitrate and calcium carbonate | |
| US1859738A (en) | Process of manufacturing fertilizers | |
| US2762699A (en) | Process for the production of ammonium sulphate-nitrate | |
| GB430380A (en) | Improvements in the manufacture and production of mixed fertilisers containing lime | |
| US1908978A (en) | Production of noncaustic calcium cyanamide | |
| GB392531A (en) | Process for the production of distributable and non-caking fertilisers containing calcium nitrate | |
| GB413636A (en) | Processes for the production of fertilisers | |
| US1947570A (en) | Treatment of sodium calcium cyanide | |
| GB339340A (en) | Improvements in and relating to the treatment of phosphate rock and the like | |
| GB378670A (en) | Improvements in or relating to decomposing raw phosphates | |
| GB355637A (en) | Improvements in or relating to the manufacture and production of fertilizers | |
| US1866564A (en) | Process for obtaining mixtures of ammonium sulphate and di-ammonium phosphate | |
| US1355369A (en) | Nitrogenous phosphatic material and process of producing the same | |
| US1670504A (en) | Manufacture of di-ammonium phosphate | |
| US1834455A (en) | Process of manufacturing phosphoric acid and soluble phosphates | |
| SU13556A1 (en) | The method of obtaining nitrogen-phosphorus fertilizer | |
| US1760990A (en) | Manufacture of concentrated fertilizer material | |
| GB691920A (en) | Method and apparatus for producing phospho-nitrogenous fertilisers | |
| GB343701A (en) | Method of treating solutions obtained in leaching phosphate rock with nitric acid and ammonium sulphate | |
| SU1000443A1 (en) | Process for producing concentrated superphosphate | |
| US2081401A (en) | Preparation of fertilizer | |
| SU105991A1 (en) | The method of obtaining non-caking ammonium nitrate | |
| GB393300A (en) | Improvements in the process of preparing from rock phosphate a fertiliser suitable for use on acid or lime deficient soils or on soils rich in iron |