发明授权
- 专利标题： Process for producing polyhalogenated phenols
- 专利标题（中）： 生产多卤代酚的方法
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申请号： US555627申请日： 1975-03-05
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公开(公告)号： US4005151A公开(公告)日： 1977-01-25
- 发明人: Masataka Wataya , Nobuo Onodera , Shosuke Imamura
- 申请人： Masataka Wataya , Nobuo Onodera , Shosuke Imamura
- 申请人地址： JA Tokyo
- 专利权人： Hodogaya Chemical Co., Ltd.
- 当前专利权人： Hodogaya Chemical Co., Ltd.
- 当前专利权人地址： JA Tokyo
- 优先权： JA49-25755 19740307
- 主分类号： C07C27/00
- IPC分类号： C07C27/00 ; C07C37/045 ; C07C37/05 ; C07C39/27 ; C07C67/00 ; C07C39/30 ; C07C39/32
摘要：
A process for producing polyhalogenated phenol by mixing a polyhalogenated aniline with an aqueous sulfuric acid solution to obtain a suspension of fine particles of polyhalogenated aniline sulfate having the particle size of 50 .mu. or less, diazotizing the polyhalogenated aniline sulfate to obtain polyhalogenate benzenediazonium sulfate, hydrolyzing the resulting benzenediazonium sulfate by heating it as such, recycling to the diazotization step the aqueous sulfuric acid solution from which the desired polyhalogenated phenol has been separated.