GB1023345A - Improvements in or relating to the production of phosphoric acid - Google Patents
Improvements in or relating to the production of phosphoric acidInfo
- Publication number
- GB1023345A GB1023345A GB4620463A GB4620463A GB1023345A GB 1023345 A GB1023345 A GB 1023345A GB 4620463 A GB4620463 A GB 4620463A GB 4620463 A GB4620463 A GB 4620463A GB 1023345 A GB1023345 A GB 1023345A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aqueous solution
- ions
- sodium
- gypsum
- silica
- 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
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/225—Dihydrate process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
Phosphoric acid, gypsum, and sodium or potassium fluorosilicate are produced by reacting ground phosphate rock with an aqueous solution of H2SO4 in presence of a sufficient quantity of silica or a source of silica, which is able to react with the fluorine in the phosphate rock and convert substantially the whole of said fluorine into fluosilicate ions, filtering of the pptd. gypsum and precipitating sodium or potassium fluorosilicate by the addition of an aqueous solution containing sodium or potassium ions to the filtrate and filtering off the ppt. The quantity of H2SO4 used is 2.3 to 2.8 parts by weight of 100% acid per part of P2O5 in the raw rock. The source of silica is preferably water soluble being sodium or potassium silicate, but it may be finely divided kieselguhr or clay. The aqueous solution of H2SO4 added in the opening-up stage may contain (NH4)2SO4. If desired the aqueous solution containing the Na or K ions may be added at the opening-up stage in quantities such that after reaction and removal of the gypsum, a saturated solution of Na or K2SiF6 is produced. The quantity of Na or K ions added, calculated as Na2O equivalent is preferably less than 1% by weight of the original rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4620463A GB1023345A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to the production of phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4620463A GB1023345A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to the production of phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1023345A true GB1023345A (en) | 1966-03-23 |
Family
ID=10440279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4620463A Expired GB1023345A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to the production of phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1023345A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048289A (en) * | 1973-12-13 | 1977-09-13 | Fertilizantes Fosfatados Mexicanos, S.A. | Stabilization of wet-process phosphoric acid |
| FR2354962A1 (en) * | 1976-06-15 | 1978-01-13 | Pennzoil Co | PROCESS FOR THE PRODUCTION OF PHOSPHORIC ACID AND PHOSPHATE WITHOUT FLUORINE |
| US4248846A (en) * | 1979-07-03 | 1981-02-03 | W. R. Grace & Co. | Production of stabilized wet process phosphoric acid |
-
1963
- 1963-11-22 GB GB4620463A patent/GB1023345A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048289A (en) * | 1973-12-13 | 1977-09-13 | Fertilizantes Fosfatados Mexicanos, S.A. | Stabilization of wet-process phosphoric acid |
| FR2354962A1 (en) * | 1976-06-15 | 1978-01-13 | Pennzoil Co | PROCESS FOR THE PRODUCTION OF PHOSPHORIC ACID AND PHOSPHATE WITHOUT FLUORINE |
| US4248846A (en) * | 1979-07-03 | 1981-02-03 | W. R. Grace & Co. | Production of stabilized wet process phosphoric acid |
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