GB699882A - Production of calcium phosphate - Google Patents
Production of calcium phosphateInfo
- Publication number
- GB699882A GB699882A GB2138451A GB2138451A GB699882A GB 699882 A GB699882 A GB 699882A GB 2138451 A GB2138451 A GB 2138451A GB 2138451 A GB2138451 A GB 2138451A GB 699882 A GB699882 A GB 699882A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- solution
- phosphate
- monocalcium phosphate
- rock
- 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
- 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
- C05B1/04—Double-superphosphate; Triple-superphosphate; Other fertilisers based essentially on monocalcium phosphate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
Abstract
A method of producing monocalcium phosphate comprises forming a solution of strong phosphoric acid containing dissolved monocalcium phosphate, flowing said solution in a closed circuit, contacting the solution at a temperature of from 78 DEG C-125 DEG C with phosphate rock in one section of the circuit so as to dissolve the rock and increase the monocalcium phosphate content thereof, flowing the monophosphate-enriched solution to another section of the circuit, and there reducing the temperature sufficiently to crystallize a portion of the dissolved monocalcium phosphate and separating the solid monocalcium phosphate from the solution of phosphoric acid containing monocalcium phosphate, the monocalcium phosphate-depleted solution from the crystallizing step, after restoring the phosphoric acid content to substantially its original value, being employed for the further treatment of phosphate rock in the circuit. The separated solid monocalcium phosphate may be hydrolyzed to dicalcium phosphate and phosphoric acid, the latter being returned to the monocalcium phosphate-depleted solution from the crystallizing step. Additional phosphoric acid may be added to replace that consumed during the process, or sulphuric acid may be added, producing phosphoric acid and calcium sulphate which is separated from the solution. Sulphuric acid may also be employed to digest the residue of phosphate rock insoluble in phosphoric acid, thus producing a further quantity of phosphoric acid for use in the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2138451A GB699882A (en) | 1951-09-11 | 1951-09-11 | Production of calcium phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2138451A GB699882A (en) | 1951-09-11 | 1951-09-11 | Production of calcium phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB699882A true GB699882A (en) | 1953-11-18 |
Family
ID=10162010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2138451A Expired GB699882A (en) | 1951-09-11 | 1951-09-11 | Production of calcium phosphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB699882A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3401014A (en) * | 1965-11-26 | 1968-09-10 | Olin Mathieson | Preparation of pure monocalcium phosphate |
-
1951
- 1951-09-11 GB GB2138451A patent/GB699882A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3401014A (en) * | 1965-11-26 | 1968-09-10 | Olin Mathieson | Preparation of pure monocalcium phosphate |
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