发明授权
- 专利标题: Process for production of cresols
- 专利标题(中): 甲酚生产工艺
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申请号: US202160申请日: 1994-02-25
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公开(公告)号: US5399791A公开(公告)日: 1995-03-21
- 发明人: Kiyoshi Ikimi , Yoichi Ikeda , Akira Murakami , Kazushige Okamoto , Tooru Tokumaru , Motoo Hazama
- 申请人: Kiyoshi Ikimi , Yoichi Ikeda , Akira Murakami , Kazushige Okamoto , Tooru Tokumaru , Motoo Hazama
- 申请人地址: JPX Osaka
- 专利权人: Suitomo Chemical Company, Limited
- 当前专利权人: Suitomo Chemical Company, Limited
- 当前专利权人地址: JPX Osaka
- 优先权: JPX4-16136 19920131
- 主分类号: C07C39/07
- IPC分类号: C07C39/07 ; C07C37/08 ; C07C37/06
摘要:
There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas without any addition of an alkali, thereby obtaining a solution of oxygenation products containing tertiary and primary hydroperoxides of cymene; (b) washing the solution of oxygenation products obtained in step (a) with an aqueous alkali solution at a temperature in the range of from 10.degree. to 95.degree. C.; (c) subjecting the solution of oxygenation products obtained in step (b) to hydrogenation at a temperature in the range of from 60.degree. to 100.degree. C. to decrease the content of primary hydroperoxide in such a manner that the weight ratio of primary hydroperoxide to tertiary hydroperoxide is not greater than 1/25 (w/w); (d) subjecting the solution treated in step (c) to decomposition in the presence of a catalyst; and (e) subjecting the solution treated in step (d) to hydrogenation to obtain cresols.
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