发明授权
- 专利标题： Process for producing pyromellitic acid
- 专利标题（中）： 制备均苯四酸的方法
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申请号： US104892申请日： 1987-10-06
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公开(公告)号： US4824992A公开(公告)日： 1989-04-25
- 发明人: Toru Tanaka , Tomiyoshi Furuta , Kazue Suwa
- 申请人： Toru Tanaka , Tomiyoshi Furuta , Kazue Suwa
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Gas Chemical Company, Inc.
- 当前专利权人： Mitsubishi Gas Chemical Company, Inc.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX61-275329 19861120
- 主分类号： B01J27/128
- IPC分类号： B01J27/128 ; B01J27/00 ; C07B61/00 ; C07C51/00 ; C07C51/255 ; C07C51/265 ; C07C63/313 ; C07C67/00
摘要：
A process for producing pyromellitic acid which comprises oxidizing 2,4,5-trimethylbenzaldehyde with a gas containing molecular oxygen in the presence of a water solvent containing 0.5 to 12% by weight of bromine ion, 0.01 to 2.0% by weight of manganese ion and 0.1 to 10,000 ppm by weight of iron ion.According to the present invention, pyromellitic acid can be obtained in a high yield and, at the same time, the amount of remaining intermediate compounds such as methyltrimellitic acid and the like can be made few, so that pyromellitic acid can be purified easily.
公开/授权文献
- US4300913A Apparatus and method for the manufacture of product gas 公开/授权日：1981-11-17
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