GB1463742A - Purification of phosophoric acid by means of organic solvents - Google Patents
Purification of phosophoric acid by means of organic solventsInfo
- Publication number
- GB1463742A GB1463742A GB2647274A GB2647274A GB1463742A GB 1463742 A GB1463742 A GB 1463742A GB 2647274 A GB2647274 A GB 2647274A GB 2647274 A GB2647274 A GB 2647274A GB 1463742 A GB1463742 A GB 1463742A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- phosphoric acid
- conduit
- water
- azeotrope
- 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
Abstract
1463742 Phosphoric acid purification HOECHST AG 14 June 1974 [4 July 1973] 26472/74 Heading C1A Impure aqueous phosphoric acid is purified by mixing with an organic solvent in which it is soluble and which is immiscible or partially miscible with water, in a ratio by volume in the range 1 : 0À3 to 1 : 30; the solvent has a boiling point higher than that of water if no water/ solvent azeotrope is formed or if an azeotrope is formed higher than that of the resulting water/ solvent azeotrope and the phosphoric acid/ solvent mixture is heated to a temperature between the boiling point of water or of the azeotrope and that of the solvent to distil off the water present in the phosphoric acid/solvent solution followed by separation of the solid residue and the resulting anhydrous phosphoric acid/organic solvent mixture and recovery of the purified phosphoric acid in the form of the free acid or its salts. Preferably crude phosphoric acid from conduit 1 is admixed with scrubbed raffinate (recycled through conduit 17) and sulphuric acid (from conduit 2) is mixed with circulated solvent in a reactor A. A sodium compound, for example sulphate, hydroxide, phosphate or carbonate, is added through conduit 3 and a 20 wt. per cent solution of Na 2 S and active carbon are added from conduits 4 and 5 to effect precipitation of heavy metals and adsorb organic impurities. Pure water or azeotrope distils over at 10 and is cooled in condenser D or if an azeotrope separated into its components in a separator E. In the latter case the solvent is recycled through conduit 12 into the reactor A whereas the aqueous phase by way of conduits 13, 14 and 15 is used partially for scrubbing the organic solvent/phosphoric acid solution in B and partially for the reextraction of phosphoric acid in C by a multistage counter-flow scrubbing operation. The solvent by way of conduit 16, is recycled to the reactor A. Scrubbed raffinate, flowing through conduit 17 is recycled to A and extracted anew with solvent. Useful solvents include organic substances which are immiscible or partially miscible with water e.g. butanol, amyl alcohol, ethylhexanol, dibutylether, methylisobutyl ketone, butyl acetate or tributyl phosphate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2334019A DE2334019C3 (en) | 1973-07-04 | 1973-07-04 | Process for the purification of contaminated aqueous phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1463742A true GB1463742A (en) | 1977-02-09 |
Family
ID=5885915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2647274A Expired GB1463742A (en) | 1973-07-04 | 1974-06-14 | Purification of phosophoric acid by means of organic solvents |
Country Status (22)
| Country | Link |
|---|---|
| JP (1) | JPS5239799B2 (en) |
| AT (1) | AT351492B (en) |
| BE (1) | BE817018A (en) |
| BR (1) | BR7405372A (en) |
| CA (1) | CA1020725A (en) |
| CH (1) | CH603488A5 (en) |
| DD (1) | DD112420A5 (en) |
| DE (1) | DE2334019C3 (en) |
| DK (1) | DK350174A (en) |
| EG (1) | EG11909A (en) |
| ES (1) | ES426753A1 (en) |
| FI (1) | FI190074A (en) |
| FR (1) | FR2235876B1 (en) |
| GB (1) | GB1463742A (en) |
| IL (1) | IL45043A (en) |
| IT (1) | IT1018704B (en) |
| NL (1) | NL178408C (en) |
| PH (1) | PH12113A (en) |
| SE (1) | SE397332B (en) |
| SU (1) | SU589902A3 (en) |
| TR (1) | TR19869A (en) |
| ZA (1) | ZA743713B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862223A (en) * | 2018-09-07 | 2018-11-23 | 云南云天化股份有限公司 | A kind of effective method for extending the Phosphoric Acid Concentration system equipment cleaning frequency |
| CN110316891A (en) * | 2019-03-25 | 2019-10-11 | 华颢控股（集团）有限公司 | A kind of preparation method of H acid waste water extraction process and modified aliphatic water reducing agent |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1436113A (en) * | 1972-04-26 | 1976-05-19 | Albright & Wilson | Purification of phosphoric acid |
| DE2538720C2 (en) * | 1975-08-30 | 1982-11-18 | Giulini Chemie Gmbh, 6700 Ludwigshafen | Process for purifying wet process phosphoric acid |
| FR2447348A1 (en) * | 1979-01-24 | 1980-08-22 | Rhone Poulenc Ind | PROCESS FOR THE PURIFICATION OF AN IMPURE PHOSPHORIC ACID |
| DE3246415A1 (en) * | 1982-12-15 | 1984-06-20 | Hoechst Ag, 6230 Frankfurt | METHOD FOR PURIFYING WET METHOD PHOSPHORIC ACID |
| JPS60155513A (en) * | 1984-01-23 | 1985-08-15 | Mitsui Toatsu Chem Inc | Concentration of phosphoric acid solution |
| DE19703884C2 (en) | 1997-02-03 | 1999-04-29 | Bk Giulini Chem Gmbh & Co Ohg | Process for purifying wet process phosphoric acid |
| JP6143808B2 (en) * | 2015-05-28 | 2017-06-07 | 曽田香料株式会社 | Extraction method of solute components in aqueous solution |
| DE102016212242B4 (en) | 2016-07-05 | 2019-02-07 | Technische Universität Bergakademie Freiberg | Process for the production of phosphoric acid from phosphorus-containing primary and secondary raw materials |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE884358C (en) * | 1951-09-20 | 1953-07-27 | Gerardo Collardin | Process for the purification of technical phosphoric acid |
-
1973
- 1973-07-04 DE DE2334019A patent/DE2334019C3/en not_active Expired
-
1974
- 1974-05-24 NL NLAANVRAGE7407025,A patent/NL178408C/en not_active IP Right Cessation
- 1974-05-29 ES ES426753A patent/ES426753A1/en not_active Expired
- 1974-05-30 CH CH740074A patent/CH603488A5/xx not_active IP Right Cessation
- 1974-06-11 ZA ZA00743713A patent/ZA743713B/en unknown
- 1974-06-14 GB GB2647274A patent/GB1463742A/en not_active Expired
- 1974-06-16 IL IL45043A patent/IL45043A/en unknown
- 1974-06-20 FI FI1900/74A patent/FI190074A/fi unknown
- 1974-06-21 SU SU742035160A patent/SU589902A3/en active
- 1974-06-24 PH PH15977A patent/PH12113A/en unknown
- 1974-06-25 EG EG244/74A patent/EG11909A/en active
- 1974-06-26 AT AT530074A patent/AT351492B/en not_active IP Right Cessation
- 1974-06-27 TR TR19869A patent/TR19869A/en unknown
- 1974-06-27 SE SE7408508A patent/SE397332B/en unknown
- 1974-06-27 FR FR7422510A patent/FR2235876B1/fr not_active Expired
- 1974-06-27 JP JP49073758A patent/JPS5239799B2/ja not_active Expired
- 1974-06-28 BR BR5372/74A patent/BR7405372A/en unknown
- 1974-06-28 DD DD179576A patent/DD112420A5/xx unknown
- 1974-06-28 CA CA203,698A patent/CA1020725A/en not_active Expired
- 1974-06-28 DK DK350174*A patent/DK350174A/da not_active Application Discontinuation
- 1974-06-28 BE BE146016A patent/BE817018A/en not_active IP Right Cessation
- 1974-06-28 IT IT51807/74A patent/IT1018704B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862223A (en) * | 2018-09-07 | 2018-11-23 | 云南云天化股份有限公司 | A kind of effective method for extending the Phosphoric Acid Concentration system equipment cleaning frequency |
| CN110316891A (en) * | 2019-03-25 | 2019-10-11 | 华颢控股（集团）有限公司 | A kind of preparation method of H acid waste water extraction process and modified aliphatic water reducing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| PH12113A (en) | 1978-11-02 |
| CA1020725A (en) | 1977-11-15 |
| FR2235876B1 (en) | 1980-05-23 |
| IT1018704B (en) | 1977-10-20 |
| DE2334019A1 (en) | 1975-01-30 |
| CH603488A5 (en) | 1978-08-15 |
| IL45043A (en) | 1977-10-31 |
| BR7405372A (en) | 1976-03-03 |
| ATA530074A (en) | 1979-01-15 |
| DK350174A (en) | 1975-03-17 |
| DE2334019C3 (en) | 1982-11-04 |
| FI190074A (en) | 1975-01-05 |
| BE817018A (en) | 1974-12-30 |
| SE7408508L (en) | 1975-01-07 |
| DD112420A5 (en) | 1975-04-12 |
| DE2334019B2 (en) | 1976-11-04 |
| EG11909A (en) | 1979-12-31 |
| ZA743713B (en) | 1975-06-25 |
| SE397332B (en) | 1977-10-31 |
| JPS5239799B2 (en) | 1977-10-07 |
| SU589902A3 (en) | 1978-01-25 |
| FR2235876A1 (en) | 1975-01-31 |
| NL7407025A (en) | 1975-01-07 |
| JPS5038696A (en) | 1975-04-10 |
| AT351492B (en) | 1979-07-25 |
| NL178408C (en) | 1986-03-17 |
| IL45043A0 (en) | 1974-09-10 |
| ES426753A1 (en) | 1976-07-16 |
| TR19869A (en) | 1980-03-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920614 |