GB366547A - Process of leaching phosphate rock - Google Patents
Process of leaching phosphate rockInfo
- Publication number
- GB366547A GB366547A GB28408/30A GB2840830A GB366547A GB 366547 A GB366547 A GB 366547A GB 28408/30 A GB28408/30 A GB 28408/30A GB 2840830 A GB2840830 A GB 2840830A GB 366547 A GB366547 A GB 366547A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphate
- excess
- rock
- alkali
- recrystallization
- 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
-
- 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
- C05B11/04—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 using mineral acid
- C05B11/08—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 using mineral acid using sulfuric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A modification of the process of the parent Specification for leaching phosphate rock is characterized in that recrystallization of calcium sulphate semihydrate to the dihydrate in the phosphatic solution produced is carried out in the presence of an excess of sulphuric acid or alkali or ammonium sulphate. Thus, the rock may be leached with an equivalent amount of sulphuric acid, and excess alkali or ammonium sulphate be then added, prior to recrystallization; or a quantity of sulphuric acid or acid alkali sulphate equivalent to the total quantity of phosphate rock may be used to treat only a major portion of the rock, and the remainder of the rock is added after the calcium sulphate first precipitated has recrystallized. In the latter case, no excess of sulphate remains in the finished product. Alternatively, an excess of soluble sulphate may be kept in circulation, this excess being recovered in the mother liquor after neutralization of the phosphoric acid, and again added to the teaching operation or on recrystallization of the gypsum. In an example, the beneficial effect of adding excess alkali or ammonium sulphate is shown by the decreasing amounts of phosphoric acid included in the dihydrate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE366547X | 1928-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB366547A true GB366547A (en) | 1932-01-25 |
Family
ID=20308999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28408/30A Expired GB366547A (en) | 1928-06-05 | 1930-09-23 | Process of leaching phosphate rock |
Country Status (2)
| Country | Link |
|---|---|
| BE (2) | BE355280A (en) |
| GB (1) | GB366547A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354315B (en) * | 2021-07-09 | 2022-11-22 | 贵州大学 | Method for producing high-silicon sulphoaluminate cement by using phosphorus acid insoluble slag |
-
1928
- 1928-10-26 BE BE355280A patent/BE355280A/fr unknown
-
1930
- 1930-09-23 GB GB28408/30A patent/GB366547A/en not_active Expired
- 1930-09-28 BE BE373585A patent/BE373585R/fr active
Also Published As
| Publication number | Publication date |
|---|---|
| BE373585R (en) | 1930-10-31 |
| BE355280A (en) | 1928-11-30 |
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