IE40576B1 - Purified phosphoric acid and its production - Google Patents
Purified phosphoric acid and its productionInfo
- Publication number
- IE40576B1 IE40576B1 IE19775A IE19775A IE40576B1 IE 40576 B1 IE40576 B1 IE 40576B1 IE 19775 A IE19775 A IE 19775A IE 19775 A IE19775 A IE 19775A IE 40576 B1 IE40576 B1 IE 40576B1
- Authority
- IE
- Ireland
- Prior art keywords
- phosphoric acid
- aqueous
- water
- organic
- organic solvent
- Prior art date
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
- C01B25/46—Preparation involving solvent-solvent extraction
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1472970 Purified phosphoric acid RHONEPOULENC INDUSTRIES 31 Jan 1975 [1 Feb 1974] 4336/75 Heading C1A Very pure phosphoric acid solutions are prepared by the-counter-current extraction of wetprocess phosphoric acid solution in the presence of sulphuric acid and water by means of a waterimmiscible organic solvent, contacting the resulting organic phosphoric acid solution with an aqueous solution containing phosphate and calcium ions (prepared from calcium phosphate, phosphoric acid and water such that the Ca<SP>2+</SP> content is from 2-6% by wt. as CaO), in order to precipitate the sulphate ions as suspension in the aqueous solution washing the phosphoric acid in organic solvent with water and separating the organic phase from the aqueous washing phase, and subjecting the organic phase to liquid-liquid contact with an aqueous phase to transfer purified phosphoric acid to the aqueous phase and separating off the organic solvent from the product. The second step is preferably performed continuously within a recycled flow of aqueous phosphate and calcium ion-containing solution. The organic solvent is generally a C 4 -C 8 aliphatic alcohol such as isobutyl alcohol, and it may be collected after the last step, possible purified, before recycling for the extraction step. After the washing step the organic extract may be treated either with water to produce an aqueous solution of phosphoric acid or with a neutralizing compound such as alkali metal or ammoniacal compound, to give a partially neutralized phosphoric acid, e.g. (mono) sodium phosphate.
[GB1472970A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7403399A FR2259787B1 (en) | 1974-02-01 | 1974-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE40576L IE40576L (en) | 1975-08-01 |
| IE40576B1 true IE40576B1 (en) | 1979-07-04 |
Family
ID=9134358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE19775A IE40576B1 (en) | 1974-02-01 | 1975-01-31 | Purified phosphoric acid and its production |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS50123595A (en) |
| BE (1) | BE825085A (en) |
| CA (1) | CA1043535A (en) |
| DD (1) | DD116446A5 (en) |
| DE (1) | DE2503843B2 (en) |
| ES (1) | ES434309A1 (en) |
| FR (1) | FR2259787B1 (en) |
| GB (1) | GB1472970A (en) |
| IE (1) | IE40576B1 (en) |
| IT (1) | IT1029423B (en) |
| NL (1) | NL7501173A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2657189B2 (en) * | 1976-12-17 | 1980-02-07 | Hoechst Ag, 6000 Frankfurt | Process for the purification of NaB process phosphoric acid |
| US4197280A (en) * | 1978-10-02 | 1980-04-08 | Stauffer Chemical Company | Wet process phosphoric acid purification |
| IL69426A (en) * | 1983-08-03 | 1986-10-31 | Negev Phosphates Ltd | Process for the manufacture of purified phosphoric acid |
| DE3347421A1 (en) * | 1983-12-29 | 1985-07-11 | Hoechst Ag, 6230 Frankfurt | METHOD FOR PRODUCING LOW FLUORINE ALKALIPHOSPHATE SOLUTIONS |
-
1974
- 1974-02-01 FR FR7403399A patent/FR2259787B1/fr not_active Expired
-
1975
- 1975-01-30 DE DE19752503843 patent/DE2503843B2/en not_active Ceased
- 1975-01-31 NL NL7501173A patent/NL7501173A/en not_active Application Discontinuation
- 1975-01-31 BE BE152973A patent/BE825085A/en unknown
- 1975-01-31 GB GB433675A patent/GB1472970A/en not_active Expired
- 1975-01-31 JP JP1326775A patent/JPS50123595A/ja active Pending
- 1975-01-31 IT IT4794875A patent/IT1029423B/en active
- 1975-01-31 DD DD18394175A patent/DD116446A5/xx unknown
- 1975-01-31 IE IE19775A patent/IE40576B1/en unknown
- 1975-01-31 ES ES434309A patent/ES434309A1/en not_active Expired
- 1975-01-31 CA CA219,158A patent/CA1043535A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50123595A (en) | 1975-09-29 |
| ES434309A1 (en) | 1976-11-16 |
| DE2503843B2 (en) | 1979-08-02 |
| NL7501173A (en) | 1975-08-05 |
| IT1029423B (en) | 1979-03-10 |
| FR2259787B1 (en) | 1977-09-16 |
| DE2503843A1 (en) | 1975-08-07 |
| DD116446A5 (en) | 1975-11-20 |
| GB1472970A (en) | 1977-05-11 |
| AU7777475A (en) | 1976-08-05 |
| FR2259787A1 (en) | 1975-08-29 |
| IE40576L (en) | 1975-08-01 |
| BE825085A (en) | 1975-07-31 |
| CA1043535A (en) | 1978-12-05 |
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