ES290283A1 - Method for clarifying solutions of phosphoric acid - Google Patents
Method for clarifying solutions of phosphoric acidInfo
- Publication number
- ES290283A1 ES290283A1 ES0290283A ES290283A ES290283A1 ES 290283 A1 ES290283 A1 ES 290283A1 ES 0290283 A ES0290283 A ES 0290283A ES 290283 A ES290283 A ES 290283A ES 290283 A1 ES290283 A1 ES 290283A1
- Authority
- ES
- Spain
- Prior art keywords
- solution
- clarified
- phosphoric acid
- resin
- agent
- 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
- C01B25/235—Clarification; Stabilisation to prevent post-precipitation of dissolved impurities
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
An aqueous solution of phosphoric acid is clarified by treating the solution with a reducing agent capable of converting Fe, V, Cr and As to their lower valency and insoluble states, a flocculating agent and fine crystals of calcium or barium sulphate in such amount that a homogeneous slurry is obtained, and then separating the solution thus clarified from the solid material of the slurry. The reducing agent is preferably an alkali metal or alkaline earth metal sulphide, a hydrosulphite, a thiosulphate, Al, Zn, Mg or Fe in subdivided form, hydrazine or hydroxylamine. The flocculating agent is preferably a resin which is stable in the presence of the solutions undergoing treatment and preferably in an acid medium, up to 60 DEG C., e.g. an acrylic resin. An adsorbent material e.g. a bleaching earth, active carbon, an adsorbent resin or an organic chelating agent, may also be added to the solution to be clarified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR905016A FR1336816A (en) | 1962-07-25 | 1962-07-25 | Clarification of phosphoric acid solutions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES290283A1 true ES290283A1 (en) | 1964-02-16 |
Family
ID=8783887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0290283A Expired ES290283A1 (en) | 1962-07-25 | 1963-07-24 | Method for clarifying solutions of phosphoric acid |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT245534B (en) |
| DE (1) | DE1467110B2 (en) |
| ES (1) | ES290283A1 (en) |
| FR (1) | FR1336816A (en) |
| GB (1) | GB1020015A (en) |
| NL (1) | NL295743A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651122B2 (en) * | 1973-05-10 | 1981-12-03 | ||
| JPS5018388A (en) * | 1973-06-21 | 1975-02-26 | ||
| DE2522220C3 (en) * | 1975-05-20 | 1982-05-13 | Giulini Chemie Gmbh, 6700 Ludwigshafen | Process for the elimination of organic impurities in aqueous phosphoric acid solutions |
| LU80676A1 (en) * | 1978-12-19 | 1980-07-21 | Metallurgie Hoboken | PROCESS FOR REMOVING DIRTY AGENTS FROM PHOSPHORIC ACID |
| FR2447347A1 (en) * | 1979-01-24 | 1980-08-22 | Rhone Poulenc Ind | PROCESS FOR THE TREATMENT OF AN IMPURE PHOSPHORIC ACID |
| US4291005A (en) * | 1979-04-23 | 1981-09-22 | American Cyanamid Company | Settling out suspended solids in phosphoric acid product solutions |
| US4248846A (en) * | 1979-07-03 | 1981-02-03 | W. R. Grace & Co. | Production of stabilized wet process phosphoric acid |
| JPS58125607A (en) * | 1982-01-18 | 1983-07-26 | Toyo Soda Mfg Co Ltd | Method of removing organic substance from phosphoric acid prepared by wet process |
| DE3444975A1 (en) * | 1984-12-10 | 1986-06-12 | Hoechst Ag, 6230 Frankfurt | METHOD FOR DEARSENIZING PHOSPHORIC ACID SOLUTIONS |
| DE3631290A1 (en) * | 1986-09-13 | 1988-03-24 | Budenheim Rud A Oetker Chemie | METHOD FOR TREATING WET METAL PHOSPHORIC ACID |
| US4808391A (en) * | 1987-05-01 | 1989-02-28 | Farmland Industries, Inc. | Oxidation-reduction process for enhancing the color of and stabilizing wet process phosphoric acid |
| US9187327B2 (en) * | 2011-01-04 | 2015-11-17 | Nalco Company | Phosphoric acid production gypsum filtration flocculant pre-dilution (make down) with post-filtration phosphoric acid |
| CN102649657B (en) * | 2012-05-18 | 2013-07-10 | 成都市新都化工股份有限公司 | Production method for macroelement fully water-soluble fertilizer |
-
0
- NL NL295743D patent/NL295743A/xx unknown
-
1962
- 1962-07-25 FR FR905016A patent/FR1336816A/en not_active Expired
-
1963
- 1963-07-16 GB GB2815863A patent/GB1020015A/en not_active Expired
- 1963-07-24 AT AT591963A patent/AT245534B/en active
- 1963-07-24 DE DE19631467110 patent/DE1467110B2/en not_active Withdrawn
- 1963-07-24 ES ES0290283A patent/ES290283A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL295743A (en) | |
| DE1467110B2 (en) | 1970-11-12 |
| DE1467110A1 (en) | 1969-08-28 |
| GB1020015A (en) | 1966-02-16 |
| AT245534B (en) | 1966-03-10 |
| FR1336816A (en) | 1963-09-06 |
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