GB787590A - Fertilizer material - Google Patents
Fertilizer materialInfo
- Publication number
- GB787590A GB787590A GB256755A GB256755A GB787590A GB 787590 A GB787590 A GB 787590A GB 256755 A GB256755 A GB 256755A GB 256755 A GB256755 A GB 256755A GB 787590 A GB787590 A GB 787590A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur
- phosphate
- mols
- coal
- calcium
- 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
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0473—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by reaction of sulfur dioxide or sulfur trioxide containing gases with reducing agents other than hydrogen sulfide
- C01B17/0482—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by reaction of sulfur dioxide or sulfur trioxide containing gases with reducing agents other than hydrogen sulfide with carbon or solid carbonaceous materials
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
- C01B17/506—Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates
-
- 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)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Fertilizers (AREA)
Abstract
A fertilizer containing tri-calcium phosphate is made by heating an alumino-phosphate rock with calcium sulphate and carbonaceous material (coal, coke or anthracite) at a temperature of about 1100 DEG C. or higher. The reaction mixture contains 2 to 7 mols. CaO per mol. of P2O5. The aluminium phosphate is converted to calcium phosphate, and the aluminium sulphate formed is reduced to give sulphur and/or sulphur dioxide. The sulphur released may be recovered in elemental form by admitting an inert gas, e.g. nitrogen, or as sulphur dioxide by blowing in air or oxygen. In examples, alumino-phosphate rock (e.g. wavellite from Senegal), coal and calcium sulphate (preferably hemi hydrate) are mixed in proportions of 3.3 mols. CaO and 3 mols. coal per mol. of P2O5, and the mixture ground to 85 mesh. The mixture is then granulated with steam and dried at 60 DEG to 80 DEG C. The granulated product, of about 6 mesh, is then heated in a muffle furnace or rotating kiln to 1050 DEG to 1150 DEG C. in an atmosphere of nitrogen for 1 hour. The sulphur and gases are collected, and the product treated with steam at 1200 DEG to 1400 DEG C. to remove fluorine. The calcium sulphate used may consist of waste gypsum obtained in the processing of other phosphate rock as a filter cake which is dried at 125 DEG C. and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB256755A GB787590A (en) | 1955-01-28 | 1955-01-28 | Fertilizer material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB256755A GB787590A (en) | 1955-01-28 | 1955-01-28 | Fertilizer material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB787590A true GB787590A (en) | 1957-12-11 |
Family
ID=9741850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB256755A Expired GB787590A (en) | 1955-01-28 | 1955-01-28 | Fertilizer material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB787590A (en) |
-
1955
- 1955-01-28 GB GB256755A patent/GB787590A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2687946A (en) | Production of sulfur dioxide | |
| GB787590A (en) | Fertilizer material | |
| EP0267031B1 (en) | Desulfurization of gypsum | |
| GB891784A (en) | Lithium chloride production | |
| US1162802A (en) | Phosphate composition and process of calcining phosphates. | |
| US3681020A (en) | Thermal conversion of magnesium sulfite to magnesium oxide | |
| US1845744A (en) | Production of quicklime and sulphur dioxide | |
| GB946872A (en) | Improvements in or relating to the reduction of the alkali content of cement clinker | |
| GB191113891A (en) | Improvements in the Production of Fertilizers from Natural Phosphates. | |
| US1492810A (en) | Manufacture of calcium sulphide, etc. | |
| US1411696A (en) | Process for the production of fertilizers containing phosphoric acid and potassium | |
| US4946658A (en) | Addition of pyritic materials to feed mix for desulfurization of phosphogypsum | |
| SU431144A1 (en) | METHOD FOR PRODUCING PHOSPHOROUS FERTILIZER | |
| US1246636A (en) | Method of treating phosphate-rock. | |
| US1100539A (en) | Cyclical process of fixing atmospheric nitrogen. | |
| US1584130A (en) | Process of making alpha fertilizer | |
| US2875032A (en) | Process of preparing a phosphated product | |
| GB860952A (en) | Improvements in or relating to the decomposition of calcium sulphate in rotary kilns | |
| GB2196952A (en) | Process for producing sulphur from calcium sulphate | |
| US2165729A (en) | Manufacture of ignited phosphates | |
| DE3141677A1 (en) | Process for the preparation of calcium carbide | |
| GB1564663A (en) | Process for thermal decomposition of phosphogypsum | |
| US719698A (en) | Process of producing aluminium. | |
| US1662489A (en) | Phosphorus material | |
| SU566807A1 (en) | Method of preparing granulated superphosphate |