JPS5738985A - Treatment of waste containing fluorine and phosphoric acid - Google Patents
Treatment of waste containing fluorine and phosphoric acidInfo
- Publication number
- JPS5738985A JPS5738985A JP11399980A JP11399980A JPS5738985A JP S5738985 A JPS5738985 A JP S5738985A JP 11399980 A JP11399980 A JP 11399980A JP 11399980 A JP11399980 A JP 11399980A JP S5738985 A JPS5738985 A JP S5738985A
- Authority
- JP
- Japan
- Prior art keywords
- phosphoric acid
- calcium compounds
- fluorine
- waste water
- calcium
- 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
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE: To remove efficiently fluorine and phosphoric acid in waste water of low and high concns. by separating the fluorine and phosphoric acid in low concn. waste water as hardly soluble calcium compounds and dissolving such calcium compounds in concd. waste water.
CONSTITUTION: After the pH of waste water of low fluorine and phosphoric acid concns. is controlled to 4W12, soluble calcium compounds are added and are separated as hardly soluble calcium compounds. The separated calcium compounds are dissolved by mixing in waste water of high fluorine and phosphoric acid concns., after which the pH is controlled to 1W3 and the calcium compounds of fluorine of high purity are recovered. The treated water is kept in a 4W12pH range, and soluble calcium compounds are added thereto, by which calcium compounds of phosphoric acid of high purity are recovered. Calcium hydroxide, calcium chloride, calcium carbonate and the like are usable as the soluble calcium compounds.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11399980A JPS5738985A (en) | 1980-08-21 | 1980-08-21 | Treatment of waste containing fluorine and phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11399980A JPS5738985A (en) | 1980-08-21 | 1980-08-21 | Treatment of waste containing fluorine and phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5738985A true JPS5738985A (en) | 1982-03-03 |
Family
ID=14626521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11399980A Pending JPS5738985A (en) | 1980-08-21 | 1980-08-21 | Treatment of waste containing fluorine and phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5738985A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000084570A (en) * | 1998-07-17 | 2000-03-28 | Nec Corp | Treatment of fluorine-containing waste water and treating apparatus |
| KR100318661B1 (en) * | 1998-12-30 | 2002-11-22 | (주)니드켐 | Wastewater treatment agent and its treatment method |
| EP1716081A4 (en) * | 2004-01-21 | 2010-06-02 | Morita Chemical Ind Co Ltd | Method for producing calcium fluoride, reusing method and recycling method thereof |
-
1980
- 1980-08-21 JP JP11399980A patent/JPS5738985A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000084570A (en) * | 1998-07-17 | 2000-03-28 | Nec Corp | Treatment of fluorine-containing waste water and treating apparatus |
| KR100318661B1 (en) * | 1998-12-30 | 2002-11-22 | (주)니드켐 | Wastewater treatment agent and its treatment method |
| EP1716081A4 (en) * | 2004-01-21 | 2010-06-02 | Morita Chemical Ind Co Ltd | Method for producing calcium fluoride, reusing method and recycling method thereof |
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