JPS54119430A - Preparation of tetrabromobisphenol s - Google Patents
Preparation of tetrabromobisphenol sInfo
- Publication number
- JPS54119430A JPS54119430A JP2499978A JP2499978A JPS54119430A JP S54119430 A JPS54119430 A JP S54119430A JP 2499978 A JP2499978 A JP 2499978A JP 2499978 A JP2499978 A JP 2499978A JP S54119430 A JPS54119430 A JP S54119430A
- Authority
- JP
- Japan
- Prior art keywords
- tbs
- aqueous phase
- dispersed
- formula
- added
- 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: To obtain the title compound useful as flame retardants of the reaction or addition type for synthetic resins or fibers, in high yield, by brominating bisphenol S dispersed in water solvent.
CONSTITUTION: Bis-phenol S of formula I dispersed in water is brominated with a brominating agent, e.g. Br2 or HBR, to give tetrabromobisphenol S (TBS) of formula II, which is transferred to the organic phase by adding an organic solvent to remove the aqueous phase. An aqueous alkali is added to the organic solvent cont aining TBS to dissolve the resulting TBS salt in the aqueous phase, to which an acid is added to deposit TBS. The TBS thus formed is dried.
EFFECT: The use of separated aqueous phase as an acid reduces the cost in aftertreatment and a high-purity product with a slight discoloration can be obtained. Granulated product is easily handled and valuable.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2499978A JPS54119430A (en) | 1978-03-07 | 1978-03-07 | Preparation of tetrabromobisphenol s |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2499978A JPS54119430A (en) | 1978-03-07 | 1978-03-07 | Preparation of tetrabromobisphenol s |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54119430A true JPS54119430A (en) | 1979-09-17 |
Family
ID=12153662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2499978A Pending JPS54119430A (en) | 1978-03-07 | 1978-03-07 | Preparation of tetrabromobisphenol s |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54119430A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5008458A (en) * | 1989-01-23 | 1991-04-16 | Akzo N.V. | Process for purifying crude tetrabromobisphenol sulfone by extraction |
JPH03153662A (en) * | 1989-11-13 | 1991-07-01 | Tosoh Corp | Production of bis(4-hydroxy-3,5-dibromophenyl)sulfone |
-
1978
- 1978-03-07 JP JP2499978A patent/JPS54119430A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5008458A (en) * | 1989-01-23 | 1991-04-16 | Akzo N.V. | Process for purifying crude tetrabromobisphenol sulfone by extraction |
JPH03153662A (en) * | 1989-11-13 | 1991-07-01 | Tosoh Corp | Production of bis(4-hydroxy-3,5-dibromophenyl)sulfone |
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