发明授权
- 专利标题： Process for controlling a gas phase oxidation reactor for preparation of phthalic anhydride
- 专利标题（中）： 控制气相氧化反应器制备邻苯二甲酸酐的方法
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申请号： US13085537申请日： 2011-04-13
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公开(公告)号： US08901320B2公开(公告)日： 2014-12-02
- 发明人: Stefan Altwasser , Jürgen Zühlke , Hao Chen , Cornelia Katharina Dobner , Frank Rosowski
- 申请人： Stefan Altwasser , Jürgen Zühlke , Hao Chen , Cornelia Katharina Dobner , Frank Rosowski
- 申请人地址： DE
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： DE
- 代理机构： Drinker Biddle & Reath LLP
- 主分类号： C07D307/89
- IPC分类号： C07D307/89
摘要：
In a process for controlling a gas phase oxidation reactor for preparation of phthalic anhydride, by passing a gas stream which comprises an aromatic hydrocarbon and molecular oxygen through a multitude of reaction tubes arranged in the gas phase oxidation reactor, each of which comprises a bed of at least one catalyst and the temperature of which can be controlled by means of a heat transfer medium, at least one control parameter is measured and correcting interventions for control of the control parameter are determined, the at least one control parameter comprising the phthalic anhydride yield and the correcting parameter used being the temperature of the heat carrier medium. Over at least 90% of the lifetime of the catalyst, the change in the correcting parameter is limited to a maximum of 0.5 K within a period of 30 days. In this way, the cumulated phthalic anhydride yield over the lifetime of the catalyst is maximized.
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