FR1603527A - Concentrating phosphatic minerals containing ca co3 - Google Patents
Concentrating phosphatic minerals containing ca co3Info
- Publication number
- FR1603527A FR1603527A FR1603527DA FR1603527A FR 1603527 A FR1603527 A FR 1603527A FR 1603527D A FR1603527D A FR 1603527DA FR 1603527 A FR1603527 A FR 1603527A
- Authority
- FR
- France
- Prior art keywords
- caco3
- pure
- degrees
- concentrating
- minerals containing
- 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
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/02—Pretreatment
-
- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
Abstract
With recovery of pure CaCO3 is effected by calcination of the ground mineral at 950 degrees C to convert most of the CaCO3 to CaO and suspending the solid residue water at 60 degrees C to the boiling point of the solution and treating it with NH4Cl or NH4NO3, preferably the latter, and filtering off the concentrated insoluble phosphate. The filtrate is treated with CO2, obtained during calcination of the CaCO3, and with NH3 to give a ppt. of pure CaCO3. Enriched phosphate fertilisers may be produced with pure CaCO3 as by-product, also useful in industry, from minerals which are so high in CaCO3 content that normal processes of producing enriched phosphate fertilisers are uneconomic. Applicable to continuous operation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR174200 | 1968-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1603527A true FR1603527A (en) | 1971-05-03 |
Family
ID=8657014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1603527D Expired FR1603527A (en) | 1968-11-18 | 1968-11-18 | Concentrating phosphatic minerals containing ca co3 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR1603527A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447213A1 (en) * | 2010-10-26 | 2012-05-02 | Omya Development AG | Production of high purity precipitated calcium carbonate |
-
1968
- 1968-11-18 FR FR1603527D patent/FR1603527A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447213A1 (en) * | 2010-10-26 | 2012-05-02 | Omya Development AG | Production of high purity precipitated calcium carbonate |
| WO2012055750A1 (en) * | 2010-10-26 | 2012-05-03 | Omya Development Ag | Production of high purity precipitated calcium carbonate |
| US8992875B2 (en) | 2010-10-26 | 2015-03-31 | Omya International Ag | Production of high purity precipitated calcium carbonate |
| RU2602140C2 (en) * | 2010-10-26 | 2016-11-10 | Омиа Интернэшнл Аг | Obtaining highly pure precipitated calcium carbonate |
| US9725330B2 (en) | 2010-10-26 | 2017-08-08 | Omya International Ag | Production of high purity precipitated calcium carbonate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |