GB1472970A - Purfified phosphoric acid and its production - Google Patents
Purfified phosphoric acid and its productionInfo
- Publication number
- GB1472970A GB1472970A GB433675A GB433675A GB1472970A GB 1472970 A GB1472970 A GB 1472970A GB 433675 A GB433675 A GB 433675A GB 433675 A GB433675 A GB 433675A GB 1472970 A GB1472970 A GB 1472970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- aqueous
- water
- organic
- organic solvent
- 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
- C01B25/46—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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7403399A FR2259787B1 (en) | 1974-02-01 | 1974-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1472970A true GB1472970A (en) | 1977-05-11 |
Family
ID=9134358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB433675A Expired GB1472970A (en) | 1974-02-01 | 1975-01-31 | Purfified 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) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4197280A (en) * | 1978-10-02 | 1980-04-08 | Stauffer Chemical Company | Wet process phosphoric acid purification |
GB2167737A (en) * | 1983-08-03 | 1986-06-04 | Negev Phosphates Ltd | Purified phosphoric acid |
Families Citing this family (2)
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 |
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 CA CA219,158A patent/CA1043535A/en not_active Expired
- 1975-01-31 DD DD18394175A patent/DD116446A5/xx unknown
- 1975-01-31 NL NL7501173A patent/NL7501173A/en not_active Application Discontinuation
- 1975-01-31 GB GB433675A patent/GB1472970A/en not_active Expired
- 1975-01-31 IT IT4794875A patent/IT1029423B/en active
- 1975-01-31 BE BE152973A patent/BE825085A/en unknown
- 1975-01-31 JP JP1326775A patent/JPS50123595A/ja active Pending
- 1975-01-31 IE IE19775A patent/IE40576B1/en unknown
- 1975-01-31 ES ES434309A patent/ES434309A1/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4197280A (en) * | 1978-10-02 | 1980-04-08 | Stauffer Chemical Company | Wet process phosphoric acid purification |
GB2167737A (en) * | 1983-08-03 | 1986-06-04 | Negev Phosphates Ltd | Purified phosphoric acid |
Also Published As
Publication number | Publication date |
---|---|
IT1029423B (en) | 1979-03-10 |
JPS50123595A (en) | 1975-09-29 |
BE825085A (en) | 1975-07-31 |
AU7777475A (en) | 1976-08-05 |
ES434309A1 (en) | 1976-11-16 |
FR2259787A1 (en) | 1975-08-29 |
DD116446A5 (en) | 1975-11-20 |
IE40576L (en) | 1975-08-01 |
IE40576B1 (en) | 1979-07-04 |
NL7501173A (en) | 1975-08-05 |
CA1043535A (en) | 1978-12-05 |
DE2503843A1 (en) | 1975-08-07 |
FR2259787B1 (en) | 1977-09-16 |
DE2503843B2 (en) | 1979-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |