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    Preparation of (meth)acrolein and (meth)acrylic acid by catalytic oxidation of hydrocarbon precursors, using reactor divided by vertical thermal plates and fitted with sensors to monitor temperature
    12.
    发明专利
    Preparation of (meth)acrolein and (meth)acrylic acid by catalytic oxidation of hydrocarbon precursors, using reactor divided by vertical thermal plates and fitted with sensors to monitor temperature 未知

    公开(公告)号：DE10361456A1

    公开(公告)日：2005-07-28

    申请号：DE10361456

    申请日：2003-12-23

    Applicant: BASF AG

    Inventor： HECHLER CLAUS ,  OLBERT GERHARD ,  LOEWEN DIETMAR

    IPC: C07C51/21 ,  C07C57/05 ,  C07C47/22

    Abstract: Method for preparing (meth)acrolein and/or (meth)acrylic acid by partial gas-phase oxidation of 3-4C precursors in presence of a heterogeneous, particulate catalyst (A). Method for preparing (meth)acrolein and/or (meth)acrylic acid by partial gas-phase oxidation of 3-4C precursors in presence of a heterogeneous, particulate catalyst (A). Oxidation is done in a reactor having 2 or more vertical thermal plates (1), arranged in parallel and with gaps (2) between them, where (2) contain the catalyst and the gaseous reaction mixture is supplied to (2). The new feature is that the method is monitored, controlled and/or regulated through one or more temperature measurements, taken in one or more (2), at one or more measuring sites, distributed over the height of each (2). An independent claim is also included for a method of incorporating temperature-measuring devices into a reactor, on the same side of the reactor as the feed line for supplying gaseous reaction mixture.

    Catalytic gas phase oxidation of propene to acrylic acid involves passing over two reaction zones containing different fixed bed catalysts comprising multi-metal oxide active components
    18.
    发明专利
    Catalytic gas phase oxidation of propene to acrylic acid involves passing over two reaction zones containing different fixed bed catalysts comprising multi-metal oxide active components 未知

    公开(公告)号：DE19955176A1

    公开(公告)日：2001-01-04

    申请号：DE19955176

    申请日：1999-11-16

    Applicant: BASF AG

    Inventor： TENTEN ANDREAS ,  HIBST HARTMUT ,  MACHHAMMER OTTO ,  HECHLER CLAUS ,  MUELLER-ENGEL KLAUS JOACHIM ,  UNVERRICHT SIGNE

    IPC: B01J23/00 ,  B01J23/887 ,  B01J35/00 ,  C07C51/25 ,  C07C57/05

    Abstract: Catalytic gas phase oxidation of propene to acrylic acid involves using two different fixed bed catalysts, in different reaction zones, with active components comprising multi-metal oxides of different composition and containing iron, molybdenum and optionally bismuth. Catalytic gas phase oxidation of propene to acrylic acid comprises: (i) reacting O2 and propene in a ratio of at least 1 and an inert gas; (ii) passing over a fixed bed catalyst (FBC) (FBC1), comprising a multi-metal oxide containing at least Mo, Fe and Bi, in a reaction zone (RZ) (A), the propene conversion and the subsequent acrolein and acrylic acid product formation being at least 90 mol.%, optionally in the presence of oxygen and/or inert gas in a ratio of O2:propene of at least 0.5; and (iii) passing over a second FBC (FBC2), comprising a predischarge active component(s) comprising a multi-metal oxide(s) containing at least Mo and Fe and a postdischarge active component(s) comprising a multi-metal oxide(s) containing at least Mo and V at least one of which also contains an amount of Bi that is smaller than in the first FBC, where the amount of Fe in a postdischarge component(s) is lower than in a predischarge component(s), in a second RZ (B), which is at a lower temperature than RZ (A), to give an acrolein conversion in RZ (B) of at least 90 mol.% and an acrylic acid selectivity over both reaction zones of at least 80 mol %.

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