发明授权
- 专利标题： Purification of naphthoquinone
- 专利标题（中）： 萘醌的纯化
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申请号： US22878申请日： 1979-03-22
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公开(公告)号： US4257851A公开(公告)日： 1981-03-24
- 发明人: Ryo Matsuura , Kazuaki Sakai , Tuneyasu Sato , Yorinobu Yamada , Kowzo Bandow
- 申请人： Ryo Matsuura , Kazuaki Sakai , Tuneyasu Sato , Yorinobu Yamada , Kowzo Bandow
- 申请人地址： JPX Tokyo
- 专利权人： Kawasaki Kasei Chemicals Ltd.
- 当前专利权人： Kawasaki Kasei Chemicals Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX53-35825 19780327; JPX53-49466 19780426
- 主分类号： C07C46/10
- IPC分类号： C07C46/10 ; B01D3/10 ; C07C50/00
摘要：
A crude naphthoquinone produced by an oxidation of naphthalene is purified by a reduced pressure distillation of a crude 1,4-naphthoquinone having an acid content of less than 5 equivalent % calculated as monobasic acid and the crude naphthoquinone is preferably treated by an oxidation of oxidizable impurities.
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