发明名称 |
Method for producing trimethylhydroquinone |
摘要 |
An inexpensive method for producing trimethylhydroquinone free from the problem of the disposal of waste catalyst, which method comprises the steps of: (1) reacting isophorone in the presence of an acid catalyst and recovering beta-isophorone by distillation, (2) oxidizing the beta-isophorone in the presence of amorphous carbon and a base to obtain 4-oxoisophorone, (3) reacting the 4-oxoisophorone with an acid anhydride in a liquid phase or with a carboxylic acid in a vapor phase in the presence of a solid acid catalyst to obtain trimethylhydroquinones, and (4) hydrolyzing the trimethylhydroquinones to obtaining trimethylhydroquinone.
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申请公布号 |
US6211418(B1) |
申请公布日期 |
2001.04.03 |
申请号 |
US19980123318 |
申请日期 |
1998.07.28 |
申请人 |
NIPPON PETROCHEMICALS COMPANY LIMITED |
发明人 |
SUYAMA KAZUHARU;KIYOTA NOBORU;KONISHI TOMOHIRO;MATSUMURA YASUO |
分类号 |
C07C39/08;C07C67/00;(IPC1-7):C07C37/00 |
主分类号 |
C07C39/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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