JPS5738315A - Fractionally recovering method for fluorine and phosphoric acid in waste water - Google Patents
Fractionally recovering method for fluorine and phosphoric acid in waste waterInfo
- Publication number
- JPS5738315A JPS5738315A JP11399880A JP11399880A JPS5738315A JP S5738315 A JPS5738315 A JP S5738315A JP 11399880 A JP11399880 A JP 11399880A JP 11399880 A JP11399880 A JP 11399880A JP S5738315 A JPS5738315 A JP S5738315A
- Authority
- JP
- Japan
- Prior art keywords
- phosphoric acid
- waste water
- complex
- compound
- soluble
- 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)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To remove F and phosphoric acid in waste water to low concns. and to recover them with a Ca compound fractionally and easily by converting F into a soluble F-Al complex to recover phosphoric acid selectively and decomposing the complex when F and phosphoric acid in waste water are converted into Ca salts.
CONSTITUTION: An Al compound is added to waste water and kept at a proper pH to produce a water soluble F-Al complex, thereby masking F. By adding a Ca compound to this soln., phosphoric acid is fixed as slightly soluble Ca3(PO4)2, separated, and recovered. The pH of the soln. is then adjusted to ≥9 with caustic alkali to decompose said complex, and by adding a Ca compound, slightly soluble CaF2 is deposited, separated, and recovered. Finally, the pH of the waste water is adjusted to deposit slightly water soluble Al hydroxide and a residual small amt. of F, which are then separated and removed. The Al hydroxide is used again.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11399880A JPS5738315A (en) | 1980-08-21 | 1980-08-21 | Fractionally recovering method for fluorine and phosphoric acid in waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11399880A JPS5738315A (en) | 1980-08-21 | 1980-08-21 | Fractionally recovering method for fluorine and phosphoric acid in waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5738315A true JPS5738315A (en) | 1982-03-03 |
Family
ID=14626494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11399880A Pending JPS5738315A (en) | 1980-08-21 | 1980-08-21 | Fractionally recovering method for fluorine and phosphoric acid in waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5738315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897732A (en) * | 2011-07-26 | 2013-01-30 | 徐州特瑞达环保科技有限公司 | Waste phosphoric acid solution processing method |
| CN105293744A (en) * | 2014-05-27 | 2016-02-03 | 中国石油化工股份有限公司 | Treatment method for fluorine-containing and phosphorus- containing wastewater |
-
1980
- 1980-08-21 JP JP11399880A patent/JPS5738315A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102897732A (en) * | 2011-07-26 | 2013-01-30 | 徐州特瑞达环保科技有限公司 | Waste phosphoric acid solution processing method |
| CN105293744A (en) * | 2014-05-27 | 2016-02-03 | 中国石油化工股份有限公司 | Treatment method for fluorine-containing and phosphorus- containing wastewater |
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