GB1240285A - Purification of phosphoric acid - Google Patents
Purification of phosphoric acidInfo
- Publication number
- GB1240285A GB1240285A GB46064/68A GB4606468A GB1240285A GB 1240285 A GB1240285 A GB 1240285A GB 46064/68 A GB46064/68 A GB 46064/68A GB 4606468 A GB4606468 A GB 4606468A GB 1240285 A GB1240285 A GB 1240285A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ether
- phosphoric acid
- acid
- mixture
- ethyl
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
1,240,285. Phosphoric acid. ISRAEL MINING INDUSTRIES - INSTITUTE FOR RESEARCH & DEVELOPMENT. 27 Sept., 1968 [27 Nov., 1967], No. 46064/68. Addition to 1,112,033. Heading C1A. A process for recovering phosphoric acid from technical grade phosphoric acid comprises treating technical grade phosphoric acid with a mixture of at least two extracting solvents of the kind defined in Specification 1,112,033, the temperature of the treatment being low enough for the formation of a clear homogeneous extract phase distinct from a residual aqueous phase, separating the extract phase from the aqueous phase, raising the temperature of the extract phase to that at which it separates into a lower layer containing phosphoric acid and an upper layer containing the solvents and separating the lower layer from the upper layer. The solvents are for example esters, ketones, glycol ethers and ethers, such as ethyl, butyl and amyl acetate, ethyl butyrate and cyclohexanone. Stratification is enhanced by the addition of a small amount of water or purified phosphoric acid. The yield is increased by incorporation of sulphuric acid in amount e.g. from 0À1 to 5% in the technical grade acid. The residual acid, after separation of the solvent extract may be acidified with sulphuric acid in amount 30 to 100% by weight of the phosphoric acid and subjected to a repeated extraction with one or mixture of extracting solvents and a mixture of purified phosphoric and sulphuric acids is recovered. Impurities in the original acid can be removed by addition of alumina, calcium compounds, active carbon silicon dioxide or active clay prior to the solvent extraction. Calcium hydroxide or phosphates and phosphate rock can be added to the feed phosphoric acid to neutralize free sulphuric acid present. In examples the solvents used are (1) ethyl ether and nbutyl ether; (2) n-butyl ether and dibutyl ether of ethylene glycol; (3) isopropyl ether and ethyl ether; (4) isopropyl ether and cyclohexanone; (5) ethyl ether and diethylene glycol mono nhexyl ether; (6) mixed diethylene glycol mono- and di-n-butyl ethers; (7) diethylene glycol dibutyl ether and diisobutyl ketone. In example (8) a residual fraction from the extraction of technical grade phosphoric acid with a mixture of n-butyl ether and ethyl ether in a process similar to example, is acidified with concentrated sulphuric acid and the mixture is extracted with a mixture of isopropyl ether and ethyl ether.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL2902367A IL29023A (en) | 1967-11-27 | 1967-11-27 | Purification of phosphoric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1240285A true GB1240285A (en) | 1971-07-21 |
Family
ID=11044303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB46064/68A Expired GB1240285A (en) | 1967-11-27 | 1968-09-27 | Purification of phosphoric acid |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB1240285A (en) |
IL (1) | IL29023A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103341A (en) * | 1960-12-19 | 1963-09-10 | North American Aviation Inc | Flush mounted plug valve |
US4048289A (en) * | 1973-12-13 | 1977-09-13 | Fertilizantes Fosfatados Mexicanos, S.A. | Stabilization of wet-process phosphoric acid |
US4118462A (en) * | 1974-02-01 | 1978-10-03 | Rhone-Poulenc Industries | Process for the preparation of purified phosphoric solutions from phosphoric acid |
US4127640A (en) * | 1972-04-26 | 1978-11-28 | Albright & Wilson Ltd. | Purification of phosphoric acid by solvent extraction using hexanones |
EP2924003A1 (en) * | 2014-03-26 | 2015-09-30 | Maxbiogas GmbH | Method for purifying phosphoric acid |
CN117547861A (en) * | 2023-12-27 | 2024-02-13 | 昆明红海磷肥有限责任公司 | Purifying and separating device and method for raffinate phosphoric acid and slag-containing phosphoric acid |
CN117720079A (en) * | 2023-12-11 | 2024-03-19 | 安徽金轩科技有限公司 | High-efficiency impurity removal method and system for phosphoric acid |
-
1967
- 1967-11-27 IL IL2902367A patent/IL29023A/en unknown
-
1968
- 1968-09-27 GB GB46064/68A patent/GB1240285A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103341A (en) * | 1960-12-19 | 1963-09-10 | North American Aviation Inc | Flush mounted plug valve |
US4127640A (en) * | 1972-04-26 | 1978-11-28 | Albright & Wilson Ltd. | Purification of phosphoric acid by solvent extraction using hexanones |
US4048289A (en) * | 1973-12-13 | 1977-09-13 | Fertilizantes Fosfatados Mexicanos, S.A. | Stabilization of wet-process phosphoric acid |
US4118462A (en) * | 1974-02-01 | 1978-10-03 | Rhone-Poulenc Industries | Process for the preparation of purified phosphoric solutions from phosphoric acid |
CN106103341A (en) * | 2014-03-26 | 2016-11-09 | Lxp集团有限公司 | Method for purifying phosphoric acid |
WO2015144321A1 (en) * | 2014-03-26 | 2015-10-01 | Maxbiogas Gmbh | Method for purifying phosphoric acid |
EP2924003A1 (en) * | 2014-03-26 | 2015-09-30 | Maxbiogas GmbH | Method for purifying phosphoric acid |
CN106103341B (en) * | 2014-03-26 | 2019-07-02 | Lxp集团有限公司 | Method for purifying phosphoric acid |
US10577245B2 (en) * | 2014-03-26 | 2020-03-03 | Lxp Group Gmbh | Method for purifying phosphoric acid |
CN117720079A (en) * | 2023-12-11 | 2024-03-19 | 安徽金轩科技有限公司 | High-efficiency impurity removal method and system for phosphoric acid |
CN117720079B (en) * | 2023-12-11 | 2024-05-17 | 安徽金轩科技有限公司 | High-efficiency impurity removal method and system for phosphoric acid |
CN117547861A (en) * | 2023-12-27 | 2024-02-13 | 昆明红海磷肥有限责任公司 | Purifying and separating device and method for raffinate phosphoric acid and slag-containing phosphoric acid |
CN117547861B (en) * | 2023-12-27 | 2024-04-02 | 昆明红海磷肥有限责任公司 | Purifying and separating device and method for raffinate phosphoric acid and slag-containing phosphoric acid |
Also Published As
Publication number | Publication date |
---|---|
DE1801856A1 (en) | 1969-08-07 |
DE1801856B2 (en) | 1977-01-27 |
IL29023A (en) | 1971-05-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1426018A (en) | Recovery of acids from aqueous solutions | |
GB1210446A (en) | Continuous process for the purification of phosphoric acid | |
US3556739A (en) | Cleaning phosphoric acid including recovery from the organic solvent by heating to stratify into an acid layer and an organic layer | |
GB953378A (en) | Preparation of phosphoric acid and salts thereof | |
GB1240285A (en) | Purification of phosphoric acid | |
GB1220963A (en) | Process for the production of phosphoric acid at a high concentration and gypsum by-product of improved quality | |
GB1460182A (en) | Purification of aqueous phosphoric acid | |
ES463636A1 (en) | Solvent extraction purification of wet-processed phosphoric acid | |
US2730536A (en) | Recovery of ergosterol | |
US3449074A (en) | Process for removing titanium and vanadium from phosphoric acid | |
ES336087A1 (en) | Purification procedure of phosphoric acid. (Machine-translation by Google Translate, not legally binding) | |
GB1063248A (en) | ||
GB1495481A (en) | Process for the obtaining of isobutylene of high purity | |
GB1436115A (en) | Crystallization process | |
GB1209272A (en) | Cleaning of phosphoric acid | |
GB1379351A (en) | Phosphoric acid purification | |
GB1220508A (en) | Process for the recovery of vanadium from an organic medium | |
ES8406376A1 (en) | Process for the purification of wet-process phosphoric acid. | |
US3497329A (en) | Production of phosphoric acid | |
US3729541A (en) | Recovery of beryllium | |
ES434309A1 (en) | Purfified phosphoric acid and its production | |
US3118909A (en) | Purification of gibberellins | |
GB1365010A (en) | Purification of wet process h3po4 by solvent extraction | |
GB1259140A (en) | ||
GB1516480A (en) | Process for removing sulphate ions from extracted phosphoric acid |