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    Method for the heterogeneously catalysed partial gas phase oxidation of propene to form acrolein
    6.
    发明专利
    Method for the heterogeneously catalysed partial gas phase oxidation of propene to form acrolein 未知

    公开(公告)号：ZA200508595B

    公开(公告)日：2007-04-25

    申请号：ZA200508595

    申请日：2005-10-24

    Applicant: BASF AG

    Inventor： JOACHIM MUELLER-ENGEL KLAUS ,  JOCHEN PETZOLDT ,  MARTIN DIETERLE

    IPC: C07C20090101 ,  C07C45/35

    Abstract: A process for the heterogeneous catalyzed partial oxidation of propene to acrolein in the gas phase comprises processing the reaction mixture using a fixed catalyst bed comprising two separate reaction zones in series, A and B maintained at 290-380[deg]C and where active mass comprises a multimetal oxide of Mo, Fe and Bi such that zone A results in a propene conversion of 40-80 mol.%. A process for the heterogeneous catalyzed partial oxidation of propene to acrolein in the gas phase comprises processing a reaction mixture comprising propene, molecular oxygen and at least one inert gas having a molar ratio of O 2 to C 3H 6 of at least 1 in a reaction stage using a fixed catalyst bed comprising two separate reaction zones in series, A and B maintained at 290-380[deg]C and where active mass comprises a multimetal oxide of Mo, Fe and Bi such that zone A results in a propene conversion of 40-80 mol.% and a single pass thorugh the total catalyst bed results in a greater than 90 mol.% propene conversion with a selectivity to acrolein of greater than 90 mol.% whereby the reaction mixture passes through the zones corresponding to theur alphabetical order and is characterized by a reaction gas loading of 90-160 Nl propene per liter of fixed catalyst bed per hour; the volume specific activity of the fixed catalyst bed in the flow direction of the reaction mixture is either constant or increases at least once; and the difference between the maximum temperatures in zone A and B is at least 0[deg]C.

    Method for the heterogeneously catalysed partial gas phase oxidation of acrolein to form acrylic acid
    10.
    发明专利
    Method for the heterogeneously catalysed partial gas phase oxidation of acrolein to form acrylic acid 未知

    公开(公告)号：ZA200508599B

    公开(公告)日：2007-01-31

    申请号：ZA200508599

    申请日：2005-10-24

    Applicant: BASF AG

    Inventor： MARTIN DIETERLE ,  JOCHEN PETZOLDT ,  HEIKO ARNOLD ,  WILHELM RUPPEL ,  JOACHIM MULLER-ENGEL KLAUS

    IPC: C07C20090101 ,  C07C51/10 ,  C07C51/25

    Abstract: A process for the catalyzed partial gas phase oxidation of acrolein to acrylic acid comprises processing a reaction mixture comprising acrolein, molecular oxygen and at least one inert gas in a molar ratio of O 2 to C 3H 4O of at least 0.5 in a reaction step using a fixed catalyst bed comprising a multi metal oxide containing Mo and V whereby the fixed catalyst bed comprises two separate temperature zones A and B arranged in series. A process for the catalyzed partial gas phase oxidation of acrolein to acrylic acid comprises processing a reaction mixture comprising acrolein, molecular oxygen and at least one inert gas in a molar ratio of O 2 to C 3H 4O of at least 0.5 in a reaction step using a fixed catalyst bed. The catalyst comprised a multi metal oxide containing Mo and V whereby the fixed catalyst bed comprises two separate temperature zones A and B arranged in series. The temperature zones are maintained at 230-320[deg]C, such that the volume specific activity within a fixed catalyst zone is essentially constant and has a step-wise increase in the flow direction of the aqueous reaction mixture by transfer from one fixed catalyst zone to the other. A conversion of 45-85 mol.% acrolein is achieved in zone A; an acrolein conversion of at least 90 mol.% with selectivity to acrylic acid of at least 90 mol.% achieved by a single pass through the total fixed catalyst bed with flow through A followed by B. The catalyst bed loading of acrolein is at least 70 Nl acrolein per liter of catalyst bed per hour; the difference between the maximum temperatures in both zones A and B is at least 0[deg]C; whereby the transition from temperature zone A to temperature zone B does not occur with a transfer from one fixed catalyst zone to another fixed catalyst zone.

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