JPS5690058A - Separating method of 2,6-dichloropyridine - Google Patents
Separating method of 2,6-dichloropyridineInfo
- Publication number
- JPS5690058A JPS5690058A JP16708979A JP16708979A JPS5690058A JP S5690058 A JPS5690058 A JP S5690058A JP 16708979 A JP16708979 A JP 16708979A JP 16708979 A JP16708979 A JP 16708979A JP S5690058 A JPS5690058 A JP S5690058A
- Authority
- JP
- Japan
- Prior art keywords
- dichloropyridine
- chlorine
- water
- halogenated hydrocarbon
- mixture solution
- 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
Landscapes
- Pyridine Compounds (AREA)
Abstract
PURPOSE: To separate 2,6-dichloropyridine efficiently from a mixture solution containing the 2,6-dichloropyridine obtained by reacting a pyridine with chlorine in a halogenated hydrocarbon solvent, by using water and SO2 gas directly.
CONSTITUTION: Water and SO2 gas are directly added to a mixture solution containing 2,6-dichloropyridine obtained by reacting pyridine or 2-chloropyridine with chlorine in a halogenated hydrocarbon solvent, e.g. CCl4, for 10W30min at 25W35°C to reduce the unreacted chlorine in the solution and extract 2-chloropyridine in the form of a salt with water. The solution is then washed with a small amount of an alkali, and the halogenated hydrocarbon, e.g. CCl4 is distilled off. Then, the 2,6-dichloropyridine is separated by the distillation. The water is added to the mixture solution in such an amount as to correspond to the remaining chlorine and 2mol or more per mole the chlorine is necessary.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16708979A JPS603385B2 (en) | 1979-12-21 | 1979-12-21 | 2. Separation method of 6-dichloropyridine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16708979A JPS603385B2 (en) | 1979-12-21 | 1979-12-21 | 2. Separation method of 6-dichloropyridine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5690058A true JPS5690058A (en) | 1981-07-21 |
JPS603385B2 JPS603385B2 (en) | 1985-01-28 |
Family
ID=15843205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16708979A Expired JPS603385B2 (en) | 1979-12-21 | 1979-12-21 | 2. Separation method of 6-dichloropyridine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS603385B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20220028054A (en) | 2019-07-31 | 2022-03-08 | 제이에프이 스틸 가부시키가이샤 | Non-oriented electrical steel sheet and its manufacturing method |
-
1979
- 1979-12-21 JP JP16708979A patent/JPS603385B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS603385B2 (en) | 1985-01-28 |
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