Process for the preparation of tetrabromobisphenol A
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United States of America Patent
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Nov 16, 2010
Grant Date -
Jan 14, 2010
app pub date -
Jul 3, 2006
filing date -
Jul 7, 2005
priority date (Note) -
Expired
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Abstract
A process for preparing tetrabromobisphenol A, which comprises: i) reacting bisphenol A and bromine in dichloromethane in the presence of aqueous hydrogen peroxide at a temperature in the range of room temperature to the reflux temperature, wherein said dichloromethane is present in an amount sufficient for substantially dissolving brominated derivatives of said bisphenol A formed thereby, ii) separating the substantially solid-free reaction mixture obtained in step i) into aqueous and organic phases, precipitating tetrabromobisphenol A from the organic phase and isolating said precipitated tetrabromobisphenol A from said organic phase.
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