JPS5717426A - Treatment of solution containing fluorine - Google Patents
Treatment of solution containing fluorineInfo
- Publication number
- JPS5717426A JPS5717426A JP9179580A JP9179580A JPS5717426A JP S5717426 A JPS5717426 A JP S5717426A JP 9179580 A JP9179580 A JP 9179580A JP 9179580 A JP9179580 A JP 9179580A JP S5717426 A JPS5717426 A JP S5717426A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- fluorine
- caf
- acid
- treatment
- 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 recover fluorine as high grade CaF2 from a soln. contg. fluorine and sulfurous acid by blowing air into the soln. to remove the acid as gasesous SO2 and adding a Ca salt.
CONSTITUTION: Air is blown into a soln. contg. fluorine and sulfurous acid at ≥50°C and 0.4Nm3/m3/min blowing rate. As a result, most of the acid in the soln. is removed as gaseous SO2 to reduce the residual SO3 2- concn. to ≤0.1g/l. A Ca salt such as CaCO3 is then added to the soln. freed of most of the acid to precipitate fluorine in the soln. as CaF2, and the CaF2 is recovered by filtration. In this defluorination treatment it is important to keep the soln. at 2.3W4.5pH. By this method, CaF2 having ≥80% high purity can be recovered.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9179580A JPS5717426A (en) | 1980-07-07 | 1980-07-07 | Treatment of solution containing fluorine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9179580A JPS5717426A (en) | 1980-07-07 | 1980-07-07 | Treatment of solution containing fluorine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5717426A true JPS5717426A (en) | 1982-01-29 |
Family
ID=14036540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9179580A Pending JPS5717426A (en) | 1980-07-07 | 1980-07-07 | Treatment of solution containing fluorine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5717426A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006022230A1 (en) * | 2004-08-24 | 2006-03-02 | Aquatech Corporation | Method for treating fluorine-containing wastewater and equipment for treating fluorine-containing wastewater |
JP2010158633A (en) * | 2009-01-09 | 2010-07-22 | Sumitomo Metal Mining Co Ltd | Method for separating fluorine from fluorine-containing waste water |
-
1980
- 1980-07-07 JP JP9179580A patent/JPS5717426A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006022230A1 (en) * | 2004-08-24 | 2006-03-02 | Aquatech Corporation | Method for treating fluorine-containing wastewater and equipment for treating fluorine-containing wastewater |
JP2010158633A (en) * | 2009-01-09 | 2010-07-22 | Sumitomo Metal Mining Co Ltd | Method for separating fluorine from fluorine-containing waste water |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2012266A1 (en) | Treatment of water | |
EP0304024A3 (en) | Agarose purification method using glycol | |
KR940014164A (en) | Method for Purifying Industrial Iron Chloride Solution by Selective Precipitation | |
JPS5717426A (en) | Treatment of solution containing fluorine | |
IN160952B (en) | ||
CA1242864A (en) | Process for recovering arsenic trioxide from exhaust gas of smelting | |
GB768946A (en) | Improvements in and relating to the recovery of uranium values | |
JPS5375196A (en) | Removing method for heavy metals from phosphoric acid solution | |
US3826819A (en) | Sulfuric acid purification process | |
UST102906I4 (en) | Method of removing phosphorus impurities from yellowcake | |
JPS6456889A (en) | Method for removing scale in jacket of glass lined apparatus | |
JPS56136941A (en) | Manufacture of high purity metallic thallium from thallium-containing smelting intermediate | |
US2631147A (en) | Preparation of medicinal grade sulfamethazine | |
JPS54102300A (en) | Production of industrial grade ammonium phosphate | |
JPS5698487A (en) | Purification method of potassium chloride brine | |
JPS5426994A (en) | Recovering method for purified molten sulfur | |
ATE171150T1 (en) | METHOD AND DEVICE FOR PRODUCING HIGH PURITY GYPSUM | |
JPS5632320A (en) | Recovering method for potassium silicofluoride from wet process phosphoric acid solution | |
JPS5244052A (en) | Factory waste water processing method | |
JPS5550444A (en) | Removing method for tetravalent cerium in aqueous solution | |
JPS5692121A (en) | Thallium recovering method | |
JPS5440294A (en) | Purifying method for hydrogen chloride | |
JPS5479111A (en) | Recovering method for uranium in seawater | |
JPS5622630A (en) | Recovering method for fluorine from fluorine-containing aqueous solution of aluminum nitrate | |
JPS57156325A (en) | Recovery of thiocyanate salt |