Invention Grant
- Patent Title: Purification of naphthoquinone
- Patent Title (中): 萘醌的纯化
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Application No.: US22878Application Date: 1979-03-22
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Publication No.: US4257851APublication Date: 1981-03-24
- Inventor: Ryo Matsuura , Kazuaki Sakai , Tuneyasu Sato , Yorinobu Yamada , Kowzo Bandow
- Applicant: Ryo Matsuura , Kazuaki Sakai , Tuneyasu Sato , Yorinobu Yamada , Kowzo Bandow
- Applicant Address: JPX Tokyo
- Assignee: Kawasaki Kasei Chemicals Ltd.
- Current Assignee: Kawasaki Kasei Chemicals Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX53-35825 19780327; JPX53-49466 19780426
- Main IPC: C07C46/10
- IPC: C07C46/10 ; B01D3/10 ; C07C50/00
Abstract:
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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