发明申请
- 专利标题： MULTILAYER CATALYST FOR PREPARING PHTHALIC ANHYDRIDE AND PROCESS FOR PREPARING PHTHALIC ANHYDRIDE
- 专利标题（中）： 用于制备非离子型氢化物的多层催化剂及其制备方法
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申请号： US13173736申请日： 2011-06-30
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公开(公告)号： US20120004425A1公开(公告)日： 2012-01-05
- 发明人: Stefan Altwasser , Jürgen Zühlke , Hans-Martin Allmann , Frank Rosowski
- 申请人： Stefan Altwasser , Jürgen Zühlke , Hans-Martin Allmann , Frank Rosowski
- 申请人地址： DE Ludwigshafen
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： DE Ludwigshafen
- 主分类号： C07D307/89
- IPC分类号： C07D307/89 ; B01J21/06
摘要：
The present invention relates to a multilayer catalyst for preparing phthalic anhydride which has a plurality of catalyst layers arranged in succession in the reaction tube, with the individual catalyst layers having alkali metal contents which decrease in the flow direction. The present invention further relates to a process for the oxidation of naphthalene or o-xylene/naphthalene mixtures over such a multilayer catalyst and the use of such multilayer catalysts for the oxidation of naphthalene or o-xylene/naphthalene mixtures to phthalic anhydride.
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