GB1383832A - Defluorination of wet process phosphoric acid - Google Patents
Defluorination of wet process phosphoric acidInfo
- Publication number
- GB1383832A GB1383832A GB599772A GB599772A GB1383832A GB 1383832 A GB1383832 A GB 1383832A GB 599772 A GB599772 A GB 599772A GB 599772 A GB599772 A GB 599772A GB 1383832 A GB1383832 A GB 1383832A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- phosphoric acid
- sif
- defluorination
- acid
- 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
-
- 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
- C01B25/237—Selective elimination of impurities
- C01B25/2372—Anionic impurities, e.g. silica or boron compounds
- C01B25/2375—Fluoride or fluosilicate anion
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
- Removal Of Specific Substances (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
1383832 Defluorination of phosphoric acid AMERICAN CYANAMID CO 9 Feb 1972 [15 March 1971] 5997/72 Heading C1A Wet process phosphoric acid containing from 0À3% to. 3% by wt. of F, from 0À8% to 2À7% by wt. of Al 2 O 3 and a P 2 O 5 content of 45-62% is defluorinated by mixing with silica of surface area at least 10 m.<SP>2</SP>/g. and heating to 75-105‹ C. but below the boiling point of the mixture, volatilizing the SiF 4 produced into an inert gas by intimately contacting the mixture with the inert gas such that the stripping ratio (defined) of the SiF 4 above 1À5 and the dissolved Si concn. is maintained below 0À05%, and maintaining the inert gas stream at a temperature above its dew point until it is removed from the acid mixture. Preferred inert gases are air, CO 2 , N 2 or Ar and the acid mixture may be sprayed into a stream of gas or the gas sparged into the acid to volatilize the SiF 4 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12409971A | 1971-03-15 | 1971-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1383832A true GB1383832A (en) | 1974-02-12 |
Family
ID=22412766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB599772A Expired GB1383832A (en) | 1971-03-15 | 1972-02-09 | Defluorination of wet process phosphoric acid |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3718729A (en) |
| AU (1) | AU462975B2 (en) |
| BR (1) | BR7105809D0 (en) |
| DE (1) | DE2212576A1 (en) |
| ES (1) | ES400819A1 (en) |
| FR (1) | FR2130302B1 (en) |
| GB (1) | GB1383832A (en) |
| IT (1) | IT954349B (en) |
| ZA (1) | ZA72647B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2267083A (en) * | 1992-05-06 | 1993-11-24 | Freeport Mcmoran Resource | Removing aluminium contamination from phosphoric acid |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS516894A (en) * | 1974-07-09 | 1976-01-20 | Toyo Soda Mfg Co Ltd | Seiseirinsanno seizoho |
| US4083937A (en) * | 1974-07-09 | 1978-04-11 | Toyo Soda Manufacturing Co., Ltd. | Process for preparing pure phosphoric acid |
| FR2302275A1 (en) * | 1975-02-25 | 1976-09-24 | Prorea | PROCESS FOR SIMULTANEOUS CONCENTRATION AND DEPURATION OF PHOSPHORIC ACID |
| DE2938850B1 (en) * | 1979-09-26 | 1980-06-26 | Uhde Gmbh | Process for the defluorination of phosphoric acid |
| US4377560A (en) * | 1981-07-13 | 1983-03-22 | Occidental Research Corporation | Process for producing low aluminum content phosphoric acid from high aluminum matrix |
| US5002744A (en) * | 1990-05-11 | 1991-03-26 | Imc Fertilizer, Inc. | Method for defluorinating wet process phosphoric acid |
| CN110467166A (en) * | 2019-09-20 | 2019-11-19 | 瓮福达州化工有限责任公司 | A kind of wet defluorination of phosphoric acid method |
| CN115285954B (en) * | 2022-08-12 | 2023-10-27 | 宜都兴发化工有限公司 | Method for improving fluorine yield of wet-process phosphoric acid production concentration section |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2933372A (en) * | 1956-11-02 | 1960-04-19 | Int Minerals & Chem Corp | Method of defluorinating phosphatic material |
| US2987376A (en) * | 1956-12-27 | 1961-06-06 | Int Minerals & Chem Corp | Method for defluorination of phosphoric acid |
| US3151941A (en) * | 1960-05-02 | 1964-10-06 | Smith Douglass Company Inc | Defluorination of peosphoric acid |
| US3193351A (en) * | 1961-07-05 | 1965-07-06 | Nat Distillers Chem Corp | Removal of fluorine from wet process prosphoric acid |
| NL151045B (en) * | 1964-11-30 | 1976-10-15 | Windmill Holland Bv | METHOD FOR THE REMOVAL OF FLUOR FROM PHOSPHORIC ACID. |
-
1971
- 1971-03-15 US US00124099A patent/US3718729A/en not_active Expired - Lifetime
- 1971-09-02 BR BR5809/71A patent/BR7105809D0/en unknown
-
1972
- 1972-02-01 ZA ZA720647A patent/ZA72647B/en unknown
- 1972-02-04 AU AU38652/72A patent/AU462975B2/en not_active Expired
- 1972-02-09 GB GB599772A patent/GB1383832A/en not_active Expired
- 1972-03-07 IT IT48817/72A patent/IT954349B/en active
- 1972-03-15 DE DE19722212576 patent/DE2212576A1/en active Pending
- 1972-03-15 ES ES400819A patent/ES400819A1/en not_active Expired
- 1972-03-15 FR FR7209088A patent/FR2130302B1/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2267083A (en) * | 1992-05-06 | 1993-11-24 | Freeport Mcmoran Resource | Removing aluminium contamination from phosphoric acid |
| GB2267083B (en) * | 1992-05-06 | 1995-10-11 | Freeport Mcmoran Resource | Removal of aluminum contamination during production of phosphoric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| AU462975B2 (en) | 1975-06-26 |
| ES400819A1 (en) | 1975-02-01 |
| BR7105809D0 (en) | 1973-04-05 |
| IT954349B (en) | 1973-08-30 |
| FR2130302B1 (en) | 1977-07-15 |
| DE2212576A1 (en) | 1972-09-21 |
| US3718729A (en) | 1973-02-27 |
| FR2130302A1 (en) | 1972-11-03 |
| ZA72647B (en) | 1972-10-25 |
| AU3865272A (en) | 1973-08-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |