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    Preparing multi-oxide catalyst containing niobium, tungsten, molybdenum, vanadium and copper, involves heating ammonium-containing mixture to remove ammonia in controlled atmosphere
    91.
    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.

    97.
    发明专利
    未知

    公开(公告)号：DE10117357A1

    公开(公告)日：2002-10-10

    申请号：DE10117357

    申请日：2001-04-06

    Applicant: BASF AG

    Inventor： BORGMEIER FRIEDER ,  HIBST HARTMUT ,  TENTEN ANDREAS ,  MATTMANN WOLFGANG ,  MACHHAMMER OTTO

    IPC: C07C51/215 ,  C07C57/05 ,  B01J27/057

    Abstract: The invention relates to a method for the production of acrylic acid or methacrylic acid, wherein propane or isobutane a reacted with molecular oxygen in the gas phase in a fluidized bed reactor containing a catalyst, wherein the catalyst contains a multi-metal oxide comprising a molybdenum, tellurium and/or antimony, vanadium and niobium. A catalyst activator containing at least one tellurium compound is added during the reaction.

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