发明名称 |
Umweltfreundliches Verfahren zur Herstellung von hochreinem Tetrabrombisphenol-A |
摘要 |
<p>This invention relates to an Eco-friendly method of preparation of high purity tetrabromobisphenol-A through the bromination of bisphenol-A (BPA) with a combination of bromide and bromate ions in organic solvent and water, reacting bromide salt of alkali or alkaline earth metal/hydrobromic acid and bromate as alkali/alkaline earth metal salt, optionally adding 12 N hydrochloric acid in case of metal bromide or equivalents in case of hydrobromic acid, adding alkyl sulfate salts having C6-C18 carbon chain as a surfactant at 5 to 45 DEG C over a period of 4 to 5 h under stirring, separating the crystalline (50-70 %) product; washing and drying of the product at 100 DEG C, and charging the organic layer containing un-reacted bisphenol-A, mono-, di- and tri-bromo derivatives and TBBPA with additional bisphenol-A and repeating the above process to yield 95-100 % of TBBPA in the subsequent batches.</p> |
申请公布号 |
DE60127652(T2) |
申请公布日期 |
2007.12.13 |
申请号 |
DE2001627652T |
申请日期 |
2001.01.22 |
申请人 |
COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH |
发明人 |
RAMACHANDRAIAH, GADDE;GOSH, PUSHPITO KUMAR;MEHTA, ADITYA SHANTILAL C;RAJESH, POPATLAL PANDYA;JETHVA, ASHOK DAHYABHAI;VAGHELA, SANJAY;MISRA, SUDHINDRA NATH |
分类号 |
C07C39/367;C07C;C07C37/62 |
主分类号 |
C07C39/367 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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