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    31.
    发明专利
    未知

    公开(公告)号：BRPI0406992A

    公开(公告)日：2006-01-10

    申请号：BRPI0406992

    申请日：2004-03-20

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  PETZOLDT JOCHEN ,  LLER-ENGEL KLAUS JOACHIM M ,  MARTAN HANS

    IPC: C07C51/25 ,  C07C57/05

    Abstract: A process for the heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid by passage of a gas phase mixture comprising 6-15 vol.% propene, 4-20 vol. % water and no greater than 10 vol. % of other components as well as molecular oxygen such that the molar ratio of oxygen to propene is 1.5-2.5 and the residual amount to 100 vol.% comprises molecular nitrogen though a first reaction stage. A process for the heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid by passage of a gas phase mixture (I) comprising propene, molecular oxygen and at least one inert gas having a molar ratio of oxygen to propene of at least 1. The process involves a first reaction stage at elevated temperature having a fixed catalyst bed of ring shaped catalyst having a multimetal oxide active material of formula (1). The catalyst has a volume specific activity in the flow direction of the mixture (I) which is either constant or at least increases once and the active mass composition does not change over the bed packing such that the conversion of propene is at last 90 mol.% in a single pass with a selectivity to acrolein and acrylic acid of at least 90 mol.% with direct or indirect cooling of the product mixture leaving the first reaction stage. Optional addition of molecular oxygen and/or inert gas and the product mixture comprising acrolein, molecular oxygen and at least one inert gas having a molar ratio of oxygen to acrolein of at least 0.5 is passed through a second reaction stage comprising a second fixed bed catalyst packing comprising ring shaped packing whose active mass comprises a multimetal oxide of formula (2). Multimetal oxide (2) whose volume specific activity in the direction of flow at least increases once and whose composition does not alter over the second reaction stage such that the single-pass conversion of acrolein is at least 90 mol.% and the selectivity of both reaction stages to the formation of acrylic acid (with respect to reacted propene) is at least 80 mol.% is characterized in that the reaction mixture (I) comprises 6-15 vol.% propene, 4-20 vol.% water and no greater than 10 vol. % of other components that are not propene, water, oxygen or nitrogen, as well as molecular oxygen such that the molar ratio of oxygen to propene is 1.5-2.5 and the residual amount to 100 vol.% comprises molecular nitrogen. Mo12X1aX2bX3cX4dX5eOn (1) Mo12VfX6gX7hOm (2) X1 = Bi, Co or Ni; X2 = W or Nb; X3 = Fe or Cr; X4 = K, Cs or Sr; X5 = Si, Al or Zr; X6 = W or Nb; X7 = Sb, Cu, Ni or Fe; a = 5-10; b = 0-4; c = 2-5; d = 0.02-0.15; e = 0.5-4; f = 1-5; g = 1-2; h = 1-4; m, n = number of O atoms dependent upon the valency and number of elements.

    Heterogeneous catalyzed gas phase partial oxidation of propene to acrolein, useful for the production of acrylic acid, comprises processing the reaction mixture using a fixed catalyst bed comprising two separate reaction zones in series
    36.
    发明专利
    Heterogeneous catalyzed gas phase partial oxidation of propene to acrolein, useful for the production of acrylic acid, comprises processing the reaction mixture using a fixed catalyst bed comprising two separate reaction zones in series 未知

    公开(公告)号：DE10313212A1

    公开(公告)日：2004-10-07

    申请号：DE10313212

    申请日：2003-03-25

    Applicant: BASF AG

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

    IPC: C07C45/35 ,  C07C47/22 ,  C07C27/14

    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.

    Preparing multi-oxide catalyst containing niobium, tungsten, molybdenum, vanadium and copper, involves heating ammonium-containing mixture to remove ammonia in controlled atmosphere
    37.
    发明专利
    Preparing multi-oxide catalyst containing niobium, tungsten, molybdenum, vanadium and copper, involves heating ammonium-containing mixture to remove ammonia in controlled atmosphere 未知

    公开(公告)号：DE10360058A1

    公开(公告)日：2004-07-08

    申请号：DE10360058

    申请日：2003-12-19

    Applicant: BASF AG

    Inventor： DIETERLE MARTIN ,  HIBST HARTMUT ,  POEPEL WOLFGANG JUERGEN ,  PETZOLDT JOCHEN ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: B01J23/00 ,  B01J23/887 ,  B01J23/888 ,  B01J35/00 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  C07C51/215 ,  C07C51/25 ,  B01J23/16

    Abstract: A dry, intimate mixture of ammonium ion-containing catalyst precursors is heated at a rate of up to 10 degrees C/min to decomposition in the range 240-360 degrees C. It is held in this range until 90 mol% or more of ammonia released above 160 degrees C has been evolved. At no higher than 230 degrees C, the molecular oxygen content of the atmosphere A where the thermal treatment takes place is reduced to at most 0.5 vol%. This lower oxygen content is maintained until the total ammonia released reaches 20 mol%. A dry, intimate mixture of ammonium ion-containing catalyst precursors is heated at a rate of up to 10 degrees C/min to decomposition in the range 240-360 degrees C. It is held in this range until 90 mol% or more of ammonia released above 160 degrees C has been evolved. At no higher than 230 degrees C, the molecular oxygen content of the atmosphere A where the thermal treatment takes place is reduced to at most 0.5 vol%. This lower oxygen content is maintained until the total ammonia released reaches 20 mol%. At the earliest when more than 70 mol% of the ammonia has been released, the mixture is heated above the decomposition temperature range, at 10 degrees C/min, to reach the calcining temperature range of 380-450 degrees C. At the latest, when 98 mol% of the total ammonia has been released during the entire course of thermal treatment, the molecular oxygen content of the atmosphere A is raised to above 0.5 vol%-4.0 vol%. The intimate dry mixtures is then calcined in the calcination temperature range, under the increased oxygen content.

    40.
    发明专利
    未知

    公开(公告)号：BRPI0416081B1

    公开(公告)日：2014-08-19

    申请号：BRPI0416081

    申请日：2004-10-08

    Applicant: BASF AG

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

    IPC: C07C51/25 ,  C07C57/04

    Abstract: A process for the long-term operation of a heterogeneously catalyzed gas phase partial oxidation of acrolein to acrylic acid, in which the temperature of the fixed catalyst bed is increased over time and partial oxidation is interrupted and an oxygen-containing gas is conducted through the fixed catalyst bed before the temperature increase is 8° C.

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