JPS5520203A - Phosphoric acid purifying method - Google Patents
Phosphoric acid purifying methodInfo
- Publication number
- JPS5520203A JPS5520203A JP8887978A JP8887978A JPS5520203A JP S5520203 A JPS5520203 A JP S5520203A JP 8887978 A JP8887978 A JP 8887978A JP 8887978 A JP8887978 A JP 8887978A JP S5520203 A JPS5520203 A JP S5520203A
- Authority
- JP
- Japan
- Prior art keywords
- phosphoric acid
- solvent
- soln
- extracted
- org
- 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.)
- Granted
Links
Abstract
PURPOSE: To efficiently obtain pure phosphoric acid of high quality with a simple apparatus by extraction-purifying wet process phosphoric acid contg. impurities with a sater wol. low b.p. org. solvent and 2-ethyl hexanol in order.
CONSTITUTION: A phosphoric acid soln. contg. many impurities such as Fe, F, As and Cd manufactured by a wet process is extracted with a water sol. low b.p. org. solvent such as methanol, ehtanol or acetone. Caustic soda, ammonia or the like is added to the extracted soln. in a molar ratio of 1:0.05W0.4 to phosphoric acid in the soln. to partially neutralize the soln. After separation-removing precipitates formed the solvent is distilled off. The distillation residue is treated with 2-ethyl hexanol or a mixed solvent of the above solvent and diisopropyl carbinol to extract phosphoric acid, which is back-extracted with water. The aq. phase is then treated with activated carbon and concentrated to obtain pure phosphoric acid.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8887978A JPS5839767B2 (en) | 1978-07-20 | 1978-07-20 | Phosphoric acid purification method |
MA18730A MA18533A1 (en) | 1978-07-20 | 1979-07-18 | INSECTICIDE COMPOSITIONS CONTAINING PYRETHRINE SERIES COMPOUNDS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8887978A JPS5839767B2 (en) | 1978-07-20 | 1978-07-20 | Phosphoric acid purification method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5520203A true JPS5520203A (en) | 1980-02-13 |
JPS5839767B2 JPS5839767B2 (en) | 1983-09-01 |
Family
ID=13955279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8887978A Expired JPS5839767B2 (en) | 1978-07-20 | 1978-07-20 | Phosphoric acid purification method |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5839767B2 (en) |
MA (1) | MA18533A1 (en) |
-
1978
- 1978-07-20 JP JP8887978A patent/JPS5839767B2/en not_active Expired
-
1979
- 1979-07-18 MA MA18730A patent/MA18533A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPS5839767B2 (en) | 1983-09-01 |
MA18533A1 (en) | 1980-04-01 |
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