JPS5650104A - Treatment of water containing phosphate - Google Patents
Treatment of water containing phosphateInfo
- Publication number
- JPS5650104A JPS5650104A JP11791079A JP11791079A JPS5650104A JP S5650104 A JPS5650104 A JP S5650104A JP 11791079 A JP11791079 A JP 11791079A JP 11791079 A JP11791079 A JP 11791079A JP S5650104 A JPS5650104 A JP S5650104A
- Authority
- JP
- Japan
- Prior art keywords
- calcium carbonate
- phosphate
- seed crystals
- calcium
- contg
- 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 efficiently crystallize phosphate in water by adding calcium carbonate seed crystals when the phosphate in removed by contact with calcium phosphate- contg. seed crystals in the presence of Ca ion.
CONSTITUTION: Calcium carbonate particles or slaked lime contg. calcium carbonate fine crystals deposited by contact with air is used as calcium carbonate seed crystals. A calcium agent such as calcium chloride and/or an alkali agent such as sodium hydroxide is added to phosphate-contg. water to prepare conditions (≤7pH) where calcium carbonate is not dissolved, and such calcium carbonate seed crystals are added to the water. The crystals-added water is then brought into contact with calcium phosphate-contg. seed crystals such as hydroxyapatite, fluoroapatite or tricalcium phosphate. By this method calcium carbonate depositing in treatment is disposited on the added calcium carbonate seed crystals, so that activity of the calcium phosphate-contg. seed crystals is prevented from lowering.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11791079A JPS5650104A (en) | 1979-09-17 | 1979-09-17 | Treatment of water containing phosphate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11791079A JPS5650104A (en) | 1979-09-17 | 1979-09-17 | Treatment of water containing phosphate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5650104A true JPS5650104A (en) | 1981-05-07 |
Family
ID=14723202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11791079A Pending JPS5650104A (en) | 1979-09-17 | 1979-09-17 | Treatment of water containing phosphate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650104A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57204287A (en) * | 1981-06-10 | 1982-12-14 | Ebara Infilco Co Ltd | Fractional separation of thin ion contained in solution |
US5782081A (en) * | 1994-05-31 | 1998-07-21 | Pyong Sik Pak | Hydrogen-oxygen burning turbine plant |
DE4480944C2 (en) * | 1994-05-31 | 1998-07-23 | Mitsubishi Heavy Ind Ltd | Hydrogen and oxygen combustion turbine plant |
CN114057173A (en) * | 2021-09-13 | 2022-02-18 | 曲阜师范大学 | Method for synthesizing hydroxyapatite with large specific surface area by using seed crystal |
-
1979
- 1979-09-17 JP JP11791079A patent/JPS5650104A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57204287A (en) * | 1981-06-10 | 1982-12-14 | Ebara Infilco Co Ltd | Fractional separation of thin ion contained in solution |
US5782081A (en) * | 1994-05-31 | 1998-07-21 | Pyong Sik Pak | Hydrogen-oxygen burning turbine plant |
DE4480944C2 (en) * | 1994-05-31 | 1998-07-23 | Mitsubishi Heavy Ind Ltd | Hydrogen and oxygen combustion turbine plant |
CN114057173A (en) * | 2021-09-13 | 2022-02-18 | 曲阜师范大学 | Method for synthesizing hydroxyapatite with large specific surface area by using seed crystal |
CN114057173B (en) * | 2021-09-13 | 2023-12-15 | 曲阜师范大学 | Method for synthesizing hydroxyapatite with large specific surface area by using seed crystal |
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