JPS57134446A - Recovery and treatment of calcium chloride formed as a by-product in the production of chloropicrin - Google Patents
Recovery and treatment of calcium chloride formed as a by-product in the production of chloropicrinInfo
- Publication number
- JPS57134446A JPS57134446A JP1804381A JP1804381A JPS57134446A JP S57134446 A JPS57134446 A JP S57134446A JP 1804381 A JP1804381 A JP 1804381A JP 1804381 A JP1804381 A JP 1804381A JP S57134446 A JPS57134446 A JP S57134446A
- Authority
- JP
- Japan
- Prior art keywords
- calcium
- chloropicrin
- chloride
- hydroxide
- calcium chloride
- 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
Abstract
PURPOSE: A waste solution containing calcium chloride, which is formed as a by- product in the production of chloropicrin used as a soil disinfectant, is combined with sodium hydroxide to form calcium hydroxide and sodium chloride, both of which are recovered, thus effecting economical recovery of calcium chloride.
CONSTITUTION: After chloropicrin is produced by chlorinating calcium picrate with calcium hypochlorite, sodium hydroxide is added to the waste solution by 1.5W2.6mol per 1mol of calcium chloride in the waste solution. Thus, calcium hydroxide and sodium chloride are formed and they are separated into the precipitate and the supernatant by standing the reaction mixture. When the reaction mixture is stood, a high molecular coagulant of polyacrylamide is added, if necessary. The calcium hydroxide recovered is cnlorinated into calcium hypochlorite and the sodium chloride is used as a raw material in electrolysis.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1804381A JPS57134446A (en) | 1981-02-12 | 1981-02-12 | Recovery and treatment of calcium chloride formed as a by-product in the production of chloropicrin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1804381A JPS57134446A (en) | 1981-02-12 | 1981-02-12 | Recovery and treatment of calcium chloride formed as a by-product in the production of chloropicrin |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57134446A true JPS57134446A (en) | 1982-08-19 |
Family
ID=11960651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1804381A Pending JPS57134446A (en) | 1981-02-12 | 1981-02-12 | Recovery and treatment of calcium chloride formed as a by-product in the production of chloropicrin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57134446A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016020296A (en) * | 2014-06-20 | 2016-02-04 | 新日鐵住金株式会社 | Iron and steel slag treatment method |
-
1981
- 1981-02-12 JP JP1804381A patent/JPS57134446A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016020296A (en) * | 2014-06-20 | 2016-02-04 | 新日鐵住金株式会社 | Iron and steel slag treatment method |
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