JPS5688810A - Preparation of phosphoric acid by wet process - Google Patents
Preparation of phosphoric acid by wet processInfo
- Publication number
- JPS5688810A JPS5688810A JP16739579A JP16739579A JPS5688810A JP S5688810 A JPS5688810 A JP S5688810A JP 16739579 A JP16739579 A JP 16739579A JP 16739579 A JP16739579 A JP 16739579A JP S5688810 A JPS5688810 A JP S5688810A
- Authority
- JP
- Japan
- Prior art keywords
- mineral acid
- impurities
- rock
- acid
- phosphoric acid
- 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.)
- Pending
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE: To prepare high-purity phosphoric acid, by eluting impurities present in a phosphate rock with a mineral acid of given concentration previously, and using the resultant purified rock free from the impurities.
CONSTITUTION: A pulverized phosphate rock is mixed with an aqueous solution of a mineral acid, e.g. sulfuric acid of concentration ≥30wt%, to elute impurities, e.g. Mg and Na, with minimized elution of phosphorus content. The mixture is then filtered, and the resultant purified rock is used to prepare concentrated phosphoric acid by the wet process. The mineral acid used in the elution can be directly or, after addition of a fresh unused mineral acid thereto, circulated through the rock purification step for reuse. The circulating mineral acid is cooled to a temperature at which the impurities present therein become a saturated state. The deposited impurities are then separated and removed to purify the mineral acid.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16739579A JPS5688810A (en) | 1979-12-21 | 1979-12-21 | Preparation of phosphoric acid by wet process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16739579A JPS5688810A (en) | 1979-12-21 | 1979-12-21 | Preparation of phosphoric acid by wet process |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5688810A true JPS5688810A (en) | 1981-07-18 |
Family
ID=15848897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16739579A Pending JPS5688810A (en) | 1979-12-21 | 1979-12-21 | Preparation of phosphoric acid by wet process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5688810A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110872103A (en) * | 2018-08-31 | 2020-03-10 | 贵州芭田生态工程有限公司 | Control liquid balance's phosphate concentrate preparation system |
-
1979
- 1979-12-21 JP JP16739579A patent/JPS5688810A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110872103A (en) * | 2018-08-31 | 2020-03-10 | 贵州芭田生态工程有限公司 | Control liquid balance's phosphate concentrate preparation system |
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