GB1220323A - Process for purifying aqueous phosphoric acid solutions - Google Patents
Process for purifying aqueous phosphoric acid solutionsInfo
- Publication number
- GB1220323A GB1220323A GB298869A GB298869A GB1220323A GB 1220323 A GB1220323 A GB 1220323A GB 298869 A GB298869 A GB 298869A GB 298869 A GB298869 A GB 298869A GB 1220323 A GB1220323 A GB 1220323A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- phosphoric acid
- sulphate
- concentration
- acid solutions
- 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
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
1,220,323. Purifying phosphoric acid. SOC. ITALIANA RESINE S.p.A. 17 Jan., 1969 [27 Jan., 1968], No. 2988/69. Heading C1A. An aqueous solution containing phosphoric acid and phosphates is concentrated from a concentration of P 2 O 5 not exceeding 25% by weight to more than 40% by weight and is freed from sulphate present, by mixing it with a solution having a higher P 2 O 5 content, precipitating calcium sulphate from the intermediate solution which has a concentration of 25% to 40% by wt. P 2 O 5 , separating the sulphate and evaporating the solution in vacuo to attain the desired concentration. Preferably the solution having a higher P 2 O 5 content contains 25 to 40% by wt. of P 2 O 5 . The high concentration product solution may be recycled as part of the added higher P 2 O 5 content solution. The process is applicable to phosphoric acid solutions obtained by leaching phosphate rock and removing most of the sulphate present by precipitation with phosphate rock.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT823923 | 1968-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1220323A true GB1220323A (en) | 1971-01-27 |
Family
ID=11126177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB298869A Expired GB1220323A (en) | 1968-01-27 | 1969-01-17 | Process for purifying aqueous phosphoric acid solutions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1220323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943232A (en) * | 1974-03-04 | 1976-03-09 | Atlantic Richfield Company | Process for the defluorination of dilute fluorine containing aqueous acid solutions |
| US4026995A (en) * | 1976-02-11 | 1977-05-31 | Atlantic Richfield Company | Process for defluorination of commercial phosphoric acid |
-
1969
- 1969-01-17 GB GB298869A patent/GB1220323A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3943232A (en) * | 1974-03-04 | 1976-03-09 | Atlantic Richfield Company | Process for the defluorination of dilute fluorine containing aqueous acid solutions |
| US4026995A (en) * | 1976-02-11 | 1977-05-31 | Atlantic Richfield Company | Process for defluorination of commercial phosphoric acid |
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