发明授权
- 专利标题: Process for preparing an unsaturated aldehyde and/or an unsaturated carboxylic acid
- 专利标题(中): 制备不饱和醛和/或不饱和羧酸的方法
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申请号: US14536969申请日: 2014-11-10
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公开(公告)号: US09169188B2公开(公告)日: 2015-10-27
- 发明人: Josef Macht , Christian Walsdorff , Cornelia Katharina Dobner , Cathrin Alexandra Welker-Nieuwoudt , Ulrich Hammon
- 申请人: BASF SE
- 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
- 代理机构: Oblon, McClelland, Maier & Neustadt, L.L.P.
- 优先权: EP13192279 20131111
- 主分类号: C07C51/16
- IPC分类号: C07C51/16 ; C07C51/42 ; C07C51/25 ; B01J23/887 ; C07C45/35
摘要:
An α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid are prepared by gas phase oxidation of alkene with molecular oxygen over a fixed catalyst bed comprising a bed of hollow cylindrical shaped catalyst bodies having a multimetal oxide active composition. The fixed catalyst bed comprises at least three successive reaction zones; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor outlet; the highest local temperature in the fixed catalyst bed does not occur in the reaction zone closest to the reactor inlet; and the value WT=(ED−ID)/2 in the reaction zone in which the highest local temperature in the fixed catalyst bed occurs is lower than in the other reaction zones, in which ED is the external diameter and ID is the internal diameter of the shaped catalyst body. The yield of the products of value is enhanced in this way.
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