| 摘要 |
<p>Disclosed is a method for preparing p-bromofluorobenzene, wherein bromination is carried out between liquid fluorobenzene and bromine in the presence of catalyst to produce p-bromofluorobenzene and hydrogen bromide. The method is characterised by introducing chlorine gas into the reaction system for oxidation reaction with hydrogen bromide to produce hydrogen chloride and oxide of hydrogen bromide, and then reacting the oxide of hydrogen bromide with fluorobenzene to produce p-bromofluorobenzene. After the bromination, the product is used as final product or post-treated to eliminate at least one of hydrogen chloride, p-chlorofluorobenzene and m-bromofluorobenzene in the product for higher purity of p-bromofluorobenzene.</p> |
