ES2013211A6 - Process for obtaining phosphoric acid from phosphorus- bearing rock via a wet route - Google Patents
Process for obtaining phosphoric acid from phosphorus- bearing rock via a wet routeInfo
- Publication number
- ES2013211A6 ES2013211A6 ES8902438A ES8902438A ES2013211A6 ES 2013211 A6 ES2013211 A6 ES 2013211A6 ES 8902438 A ES8902438 A ES 8902438A ES 8902438 A ES8902438 A ES 8902438A ES 2013211 A6 ES2013211 A6 ES 2013211A6
- Authority
- ES
- Spain
- Prior art keywords
- phosphoric acid
- phosphorus
- solvent
- extracted
- extraction
- 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 - Lifetime
Links
Abstract
This process for obtaining phosphoric acid from a phosphorus-containing rock by a wet route uses hydrochloric acid or a mixture of hydrochloric acid and phosphoric acid as an intermediate agent for attacking the phosphorus-containing rock. The reaction is preferably performed at ambient temperature and atmospheric pressure. The phosphoric acid obtained is extracted using a selective organic solvent from which it is separated by re-extraction with water under countercurrent flow at moderate temperature. The aqueous phase from the solvent extraction which essentially contains calcium chloride, non-extracted phosphoric acid and some of the solvent used is treated with sulphuric acid, precipitating calcium sulphate, which is separated out by filtration, and regenerating the hydrochloric acid which is recycled to the reaction stage together with the non-extracted phosphoric acid. In this way dissolved P2O5 and some of the extraction solvent can be recovered, liquid effluents can be eliminated and phosphorus-containing rock of any origin and any phosphorus content can be used without fine particle sizes being necessary, so conventional grinding is unnecessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8902438A ES2013211A6 (en) | 1989-07-11 | 1989-07-11 | Process for obtaining phosphoric acid from phosphorus- bearing rock via a wet route |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8902438A ES2013211A6 (en) | 1989-07-11 | 1989-07-11 | Process for obtaining phosphoric acid from phosphorus- bearing rock via a wet route |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2013211A6 true ES2013211A6 (en) | 1990-04-16 |
Family
ID=8263007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES8902438A Expired - Lifetime ES2013211A6 (en) | 1989-07-11 | 1989-07-11 | Process for obtaining phosphoric acid from phosphorus- bearing rock via a wet route |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2013211A6 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002012120A1 (en) * | 2000-08-03 | 2002-02-14 | Ecophos | Method for producing phosphoric acid |
| US7361323B2 (en) | 2002-06-28 | 2008-04-22 | Ecophos | Method for the production of phosphoric acid and/or a salt thereof and products thus obtained |
| US7687046B2 (en) | 2002-06-28 | 2010-03-30 | Ecophos | Method of producing phosphoric acid salt |
| US7824634B2 (en) | 2003-12-24 | 2010-11-02 | Ecophos | Method for etching phosphate ores |
| CN101747107B (en) * | 2009-12-17 | 2012-10-03 | 聊城鲁西化工第五化肥厂 | Method for extracting phosphoric acid by soluble sulphate instead of part of sulfuric acid |
-
1989
- 1989-07-11 ES ES8902438A patent/ES2013211A6/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002012120A1 (en) * | 2000-08-03 | 2002-02-14 | Ecophos | Method for producing phosphoric acid |
| BE1013634A3 (en) * | 2000-08-03 | 2002-05-07 | Ecophos | Process phosphoric acid production. |
| US7361323B2 (en) | 2002-06-28 | 2008-04-22 | Ecophos | Method for the production of phosphoric acid and/or a salt thereof and products thus obtained |
| US7687046B2 (en) | 2002-06-28 | 2010-03-30 | Ecophos | Method of producing phosphoric acid salt |
| US7824634B2 (en) | 2003-12-24 | 2010-11-02 | Ecophos | Method for etching phosphate ores |
| CN101747107B (en) * | 2009-12-17 | 2012-10-03 | 聊城鲁西化工第五化肥厂 | Method for extracting phosphoric acid by soluble sulphate instead of part of sulfuric acid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| SA6 | Expiration date (snapshot 920101) |
Free format text: 2009-07-11 |
|
| FD1A | Patent lapsed |
Effective date: 20040601 |