Invention Grant
- Patent Title: Process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid
- Patent Title (中): 丙烯醛异构催化部分气相氧化成丙烯酸或甲基丙烯醛至甲基丙烯酸的方法
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Application No.: US12107420Application Date: 2008-04-22
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Publication No.: US08076510B2Publication Date: 2011-12-13
- Inventor: Ulrich Hammon , Thorsten Friese , Jochen Petzoldt , Klaus Joachim Mueller-Engel , Ulrich Cremer , Andreas Raichle
- Applicant: Ulrich Hammon , Thorsten Friese , Jochen Petzoldt , Klaus Joachim Mueller-Engel , Ulrich Cremer , Andreas Raichle
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE102007019597 20070424
- Main IPC: C07C51/16
- IPC: C07C51/16

Abstract:
A process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid over a fixed catalyst bed disposed in a tube bundle reactor cooled by a heat exchange medium, wherein the temperature of the heat exchange medium is ≧290° C. and the temperature of that reactor plate surface which faces the reaction gas entry mixture and the temperature of the reaction gas entry mixture itself are ≦285° C.
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