JPS5571623A - Production of pyrosulfite - Google Patents
Production of pyrosulfiteInfo
- Publication number
- JPS5571623A JPS5571623A JP14503478A JP14503478A JPS5571623A JP S5571623 A JPS5571623 A JP S5571623A JP 14503478 A JP14503478 A JP 14503478A JP 14503478 A JP14503478 A JP 14503478A JP S5571623 A JPS5571623 A JP S5571623A
- Authority
- JP
- Japan
- Prior art keywords
- alcohols
- pyrosulfite
- butanol
- sulfur dioxide
- soln
- 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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain high purity pyrosulfite useful as pharmaceuticals, a bleaching agent, etc. in a high yield by reacting sulfite and sulfur dioxide in the presence of 1W4C alcohols.
CONSTITUTION: Powdered sulfite is suspended or dissolved in 1W4C alcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, sec. butanol and tert. butanol. Sulfur dioxide gas or a soln. of sulfur dioxide in alcohols is then added to the suspension or soln. and reacted usually at -20W150, pref. 5W120°C for about 10minW10hr. After the reaction the alcohols are distilled out, and pyrosulfite is separation-purified from the distillation residue. By this method high purity pyrosulfite of lithium, sodium, ammonium or the like is obtd. in a high yield.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14503478A JPS5571623A (en) | 1978-11-24 | 1978-11-24 | Production of pyrosulfite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14503478A JPS5571623A (en) | 1978-11-24 | 1978-11-24 | Production of pyrosulfite |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5571623A true JPS5571623A (en) | 1980-05-29 |
Family
ID=15375868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14503478A Pending JPS5571623A (en) | 1978-11-24 | 1978-11-24 | Production of pyrosulfite |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5571623A (en) |
-
1978
- 1978-11-24 JP JP14503478A patent/JPS5571623A/en active Pending
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