GB595714A - Improvements in and relating to the production of slow acting calcium phosphate fertilizers - Google Patents
Improvements in and relating to the production of slow acting calcium phosphate fertilizersInfo
- Publication number
- GB595714A GB595714A GB1721144A GB1721144A GB595714A GB 595714 A GB595714 A GB 595714A GB 1721144 A GB1721144 A GB 1721144A GB 1721144 A GB1721144 A GB 1721144A GB 595714 A GB595714 A GB 595714A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- phosphatic
- rock
- fertilizer
- mixture
- 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
- 239000003337 fertilizer Substances 0.000 title abstract 5
- QORWJWZARLRLPR-UHFFFAOYSA-H Tricalcium phosphate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 title 1
- 229910000389 calcium phosphate Inorganic materials 0.000 title 1
- 239000001506 calcium phosphate Substances 0.000 title 1
- 235000011010 calcium phosphates Nutrition 0.000 title 1
- 239000002253 acid Substances 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N Sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 3
- 239000002367 phosphate rock Substances 0.000 abstract 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract 3
- 239000001117 sulphuric acid Substances 0.000 abstract 3
- DVARTQFDIMZBAA-UHFFFAOYSA-O Ammonium nitrate Chemical compound [NH4+].[O-][N+]([O-])=O DVARTQFDIMZBAA-UHFFFAOYSA-O 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000011435 rock Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 210000000988 Bone and Bones Anatomy 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 abstract 1
- 235000010344 sodium nitrate Nutrition 0.000 abstract 1
- 239000004317 sodium nitrate Substances 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
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
- C05B1/02—Superphosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
A slow-acting fertilizer is obtained by heating a mixture of phosphatic materials, such as ground rock phosphate or bones, with sulphuric acid, say of 77-78 per cent. concentration, at 250-600 DEG C. employing 0.6 to 1.6 mols. acid per mole P2O5, with additional acid to react with impurities. Before the heating step, the mixed rock and acid may be preliminarily heated to a temperature below 250 DEG C. The material to be heated may also be prepared by adding to phosphate rock, rock which has already been reacted with the requisite amount of sulphuric acid to give the correct P2O5 acid ratio in the final mixture. The calcining may take place in a rotary cylinder in an atmosphere of air, waste gases, or steam. The product may be granulated by mixing it with ammonium or sodium nitrate in the presence of water. According to the Provisional Specification, the best treatment may take place at any temperature above 200 DEG C. and the mixture of phosphatic material and acid may stand for 12 hours before being heated.ALSO:A mixer fertilizer is obtained in granules by mixing sodium or ammonium nitrate with a slow-acting phosphatic fertilizer in the presence of water, such phosphatic fertilizer being prepared by subjecting a mixture of phosphatic material (e.g. rock phosphate) and sulphuric acid in the proportions of between 0.6 and 1.8 mols. acid per mol. P2O5 to a temperature between 250 DEG and 600 DEG C. (see Group III)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0171053A ES171053A1 (en) | 1944-09-08 | 1945-09-22 | A PROCEDURE FOR THE MANUFACTURE OF SLOW ACTING FERTILIZERS BASED ON CALCIUM PHOSPHATE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595714A true GB595714A (en) | 1947-12-15 |
Family
ID=1732923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1721144A Expired GB595714A (en) | 1944-09-08 | 1944-09-08 | Improvements in and relating to the production of slow acting calcium phosphate fertilizers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1005987B (en) * | 1955-07-04 | 1957-04-11 | Albert Ag Chem Werke | Process for the production of ammonium citrate-soluble, non-hygroscopic fertilizers from alumina phosphates |
-
1944
- 1944-09-08 GB GB1721144A patent/GB595714A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1005987B (en) * | 1955-07-04 | 1957-04-11 | Albert Ag Chem Werke | Process for the production of ammonium citrate-soluble, non-hygroscopic fertilizers from alumina phosphates |
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