JPS5444636A - Production of tetrabromobisphenol-s - Google Patents
Production of tetrabromobisphenol-sInfo
- Publication number
- JPS5444636A JPS5444636A JP11048577A JP11048577A JPS5444636A JP S5444636 A JPS5444636 A JP S5444636A JP 11048577 A JP11048577 A JP 11048577A JP 11048577 A JP11048577 A JP 11048577A JP S5444636 A JPS5444636 A JP S5444636A
- Authority
- JP
- Japan
- Prior art keywords
- water
- reaction
- organic solvent
- bisphenol
- bromine
- 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: In the bromination of bisphenol-S, a heterogeneous solvent consisting of water and an organic solvent is used as the reaction medium and hydrogen bromide evolving during the reaction is dissolved in the water to prevent troubles, thus producing titled compound useful as flame retarder by simple operations.
CONSTITUTION: In a heterogeneous mixture consisting of water and an organic solvent in a volume ratio 5W60 water to 95W40 solvent, in which the organic solvent is preferably a halogenated organic solvent that is less soluble in water such as carbon tetrachloride, the bromination of bisphenol-S of formulaIwith bromine is conducted to produce said tetrabromobisphenol-S formula II. The reaction temperature is preferably 10W80°C and the amount of bromine used in the reaction is about 4 moles per mole of the bisphenol S or a little excess. The hydrogen bromide evolving during the reaction immediately dissolves in water and does not accumulate in the organic solvent.
EFFECT: After the completion of the reaction, an aqueous hydrobromic acid is obtained and bromine is regenerated therefrom readily.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11048577A JPS5444636A (en) | 1977-09-16 | 1977-09-16 | Production of tetrabromobisphenol-s |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11048577A JPS5444636A (en) | 1977-09-16 | 1977-09-16 | Production of tetrabromobisphenol-s |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5444636A true JPS5444636A (en) | 1979-04-09 |
Family
ID=14536917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11048577A Pending JPS5444636A (en) | 1977-09-16 | 1977-09-16 | Production of tetrabromobisphenol-s |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5444636A (en) |
-
1977
- 1977-09-16 JP JP11048577A patent/JPS5444636A/en active Pending
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