GB1020071A - Process for obtaining concentrated phosphoric acid - Google Patents
Process for obtaining concentrated phosphoric acidInfo
- Publication number
- GB1020071A GB1020071A GB4602062A GB4602062A GB1020071A GB 1020071 A GB1020071 A GB 1020071A GB 4602062 A GB4602062 A GB 4602062A GB 4602062 A GB4602062 A GB 4602062A GB 1020071 A GB1020071 A GB 1020071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- phosphate
- extracted
- removal
- precipitate
- 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
- C01B25/24—Condensed phosphoric acids
-
- 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
- C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Phosphonic acid containing at least 70% P2O5, part of which is in the form of polyphosphoric acids, is prepared from aqueous solutions of phosphoric acid containing 25-56% P2O5 e.g. those obtained by the action of H2SO4 on phosphate rock by a four-step process: (1). Removal of calcium sulphate by known extraction processes at 20-25 DEG C. (2) Extraction of phosphoric acid with a polar organic solvent e.g. n-butanol, tertiary amyl alcohol, cyclopentanol, cyclohexanol, dihydroxyethyl-n-hexylether (3) Addition of sufficient water to form an azeotropic mixture. (4) Distillation of the azeotrope at atmospheric or subatmospheric pressure. In an example an aqueous solution of phosphoric acid ofter removal of CaSO4 contains 32% P2O5 and less than 5% each of fluorine, sulphate ion, and calcium, aluminium and iron oxides. The solution is extracted with tertiary amyl alcohol yielding a precipitate containing iron, alu-minium phosphate and an organic extract containing 93.5-94% of the initial P2O5; water is added to the latter and the azeotropic mixture is distilled at 250-300 mm. Hg to give phosphoric acid residue containing 69.6% P2O5, of which 1.6% is polyphosphoric acid. Cerium and lanthanum are obtained in the precipitate from step (2) and may be extracted, when phosphate rocks containing these rare earths are treated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO4497361 | 1961-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1020071A true GB1020071A (en) | 1966-02-16 |
Family
ID=20086379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4602062A Expired GB1020071A (en) | 1961-12-06 | 1962-12-05 | Process for obtaining concentrated phosphoric acid |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1261840B (en) |
| GB (1) | GB1020071A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953581A (en) * | 1973-04-30 | 1976-04-27 | Hoechst Aktiengesellschaft | Purification of wet-processed phosphoric acid using anhydrous solvents |
| US3956465A (en) * | 1970-06-12 | 1976-05-11 | Azote Et Produits Chimiques S.A. | Solvent purification of wet process phosphoric acid |
| US3996336A (en) * | 1974-07-06 | 1976-12-07 | Hoechst Aktiengesellschaft | Purification of phosphoric acid |
Family Cites Families (2)
| 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 |
| GB805517A (en) * | 1956-06-25 | 1958-12-10 | Makhtsavei Israel | Improvements in or relating to a process for the preparation of phosphoric acid |
-
1962
- 1962-12-03 DE DE1962M0054995 patent/DE1261840B/en active Pending
- 1962-12-05 GB GB4602062A patent/GB1020071A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956465A (en) * | 1970-06-12 | 1976-05-11 | Azote Et Produits Chimiques S.A. | Solvent purification of wet process phosphoric acid |
| US3953581A (en) * | 1973-04-30 | 1976-04-27 | Hoechst Aktiengesellschaft | Purification of wet-processed phosphoric acid using anhydrous solvents |
| US3996336A (en) * | 1974-07-06 | 1976-12-07 | Hoechst Aktiengesellschaft | Purification of phosphoric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1261840B (en) | 1968-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1104497A (en) | Recovery of spent etchants | |
| GB1020071A (en) | Process for obtaining concentrated phosphoric acid | |
| US4222994A (en) | Solvent extraction purification of wet-processed phosphoric acid | |
| ES426753A1 (en) | Purification of phosophoric acid by means of organic solvents | |
| GB1485494A (en) | Nitric acid recovery system | |
| GB1093927A (en) | Process for the preparation of purified phosphoric acid | |
| IL58413A (en) | Process for the recovery of uranium from crude phosphoric acids and a uranium compound recovered thereby | |
| GB1112033A (en) | Phosphoric acid recovery | |
| GB1063248A (en) | ||
| GB728511A (en) | Production of formic acid from its salts | |
| TR21939A (en) | PROCEDURE FOR TREATMENT OF WET PROCEDURE PHOSPHORIC ACID | |
| ES336087A1 (en) | Purification procedure of phosphoric acid. (Machine-translation by Google Translate, not legally binding) | |
| GB1240285A (en) | Purification of phosphoric acid | |
| IE37549B1 (en) | Purification of phosphoric acids | |
| GB1210726A (en) | Continuous process for the extraction of phosphoric acid in the form of soluble phosphates | |
| ES8106476A1 (en) | Process for the recovery of carboxylic acids from mixtures containing glycol esters derived from these acids. | |
| GB743004A (en) | Improvements in or relating to removal of salts from acetone-phenol mixtures | |
| GB636600A (en) | Method of preparing cyanamide and polymers thereof | |
| GB808101A (en) | Process for obtaining pure trimethylolpropane | |
| GB1037303A (en) | Nitric acid acidulation of phosphate rock | |
| IE40576L (en) | Purified phosphoric acid | |
| GB1081894A (en) | Improvements relating to the production of phosphoric acids | |
| GB1093926A (en) | Process for the preparation of purified phosphoric acid | |
| ES470068A1 (en) | Process for purifying phosphoric acid | |
| GB1413905A (en) | Process for concentrating aqueous solutions of fluorosilicic acid |