GB733228A - A process for manufacturing sintered phosphatic fertilizer - Google Patents
A process for manufacturing sintered phosphatic fertilizerInfo
- Publication number
- GB733228A GB733228A GB9573/52A GB957352A GB733228A GB 733228 A GB733228 A GB 733228A GB 9573/52 A GB9573/52 A GB 9573/52A GB 957352 A GB957352 A GB 957352A GB 733228 A GB733228 A GB 733228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rock
- salt
- phosphate
- silica
- added
- 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
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Citric acid soluble tricalcium phosphate of a -form is manufactured by sintering fluorine-containing phosphate rock in the presence of water vapour and 1-2 atoms of Na in the form of a salt (e.g. carbonate or phosphate) per atom of calcium combined with fluorine in said rock. When Glauber's salt is used as the sodium salt, carbonaceous material must be added in a quantity at least equal to that theoretically required for the decomposition of Na2SO4 to Na2SO3 (when CO is formed in the reaction); when the silica content of the rock is low, at least sufficient silica to combine with the liberated CaO must be added. A rotary, shaft or reverberatory furnace may be used. In examples, temperatures between 900 DEG and 1400 DEG C. are employed, and the use of a substantial excess of silica is illustrated.ALSO:A sintered phosphatic fertilizer comprising citric acid soluble tricalcium phosphate of a -form is manufactured by sintering fluorine-containing phosphate rock in the presence of water vapour and 1-2 atoms of Na in the form of a salt (e.g. carbonate or phosphate) per atom of calcium combined with fluorine in said rock. When Glauber's salt is used as the sodium salt, carbonaceous material must be added; when the silica content of the rock is low, silica must be added.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP733228X | 1951-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB733228A true GB733228A (en) | 1955-07-06 |
Family
ID=13514810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9573/52A Expired GB733228A (en) | 1951-04-23 | 1952-04-16 | A process for manufacturing sintered phosphatic fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB733228A (en) |
-
1952
- 1952-04-16 GB GB9573/52A patent/GB733228A/en not_active Expired
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