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    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
    74.
    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 %.

    Multimetal oxides
    77.
    发明专利
    Multimetal oxides 未知

    公开(公告)号：SG69990A1

    公开(公告)日：2000-01-25

    申请号：SG1996011112

    申请日：1996-11-14

    Applicant: BASF AG

    Inventor： TENTEN ANDREAS ,  MAROSI LASZLO ,  HIBST HARTMUT

    IPC: C01G1/00 ,  B01J23/00 ,  B01J23/20 ,  B01J23/28 ,  B01J23/30 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  B01J35/00 ,  C01G31/00 ,  C01G39/00 ,  C01G41/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C45/38 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055

    Abstract: A multimetal oxide of formula (I) Mo12-a-b-cVaM bM cOx is new, where: M = tungsten (W) and/or niobium (Nb); M = titanium (Ti), zirconium (Zr), hafnium (Hf), tantalum (Ta), chromium (Cr), silicon (Si) and/or germanium (Ge); a = 0.1-6; b = 0-6; c = 0-6; a+b+c = 0.1-6; and x = number determined by the valency and frequency of the element in (I) except oxygen. Its atomic space arrangement is determined by powder X-ray diffraction (the intensity A of the diffracted X-ray beam as a function of two-fold diffraction angle (2&thetas; )) using Cu-K alpha -radiation ( lambda = 1.54178 Angstrom ), so that in the 2&thetas; region of 5-50 degrees the following diffraction lines are produced: Al(X-ray diffraction line) = 8.3 plus or minus 0.7 (2&thetas; degrees ); A2=14.4 plus or minus 0.7; A3=22.3 plus or minus 0.2; A4=23.5 plus or minus 0.7; A5=27.2 plus or minus 0.4; A6=32.0 plus or minus 0.8; A7=34.8 plus or minus 0.6; A8=38.7 plus or minus 0.5; A9=45.4 plus or minus 0.4; and A10=48.8 plus or minus 0.4. Also claimed are: (i) a process for catalytic gas phase oxidation of organic compounds using the above multimetal oxide; and (ii) a finely divided mixture containing the above multimetal oxide (I) and a multimetal oxide (II) of formula: M 12CudHeOy, where: M = molybdenum (Mo), W, vanadium (V), Nb and/or Ta; d = 4-30; e = 0-20; and y = a number determined by the valency and frequency of the elements in (II) except oxygen.

    Production of acrolein and acrylic acid by catalytic oxidation of propane
    80.
    发明专利
    Production of acrolein and acrylic acid by catalytic oxidation of propane 未知

    公开(公告)号：DE19807079A1

    公开(公告)日：1999-08-26

    申请号：DE19807079

    申请日：1998-02-20

    Applicant: BASF AG

    Inventor： JACHOW HARALD ,  TENTEN ANDREAS ,  UNVERRICHT SIGNE ,  ARNOLD HEIKO

    IPC: B01J23/00 ,  C07C45/33 ,  C07C51/215 ,  C07C59/66 ,  C07C69/716 ,  C07C69/734 ,  C07C57/05 ,  B01J23/882 ,  B01J23/887 ,  B01J23/888 ,  C07C45/28 ,  C07C47/22

    Abstract: Heterogeneous, catalytic, gas-phase oxidation of propane to acrolein and/or acrylic acid comprises passing a mixture of propane, oxygen and optionally an inert gas, at 300-500 deg C, over a two-part fixed-bed catalyst, each part containing different, specific mixed metal oxide phases. The catalyst in the first bed (A) has the formula M a Mo1-bM b Ox (I) M = cobalt, nickel, magnesium, manganese and/or copper; M = wolfram, vanadium, tellurium, niobium, phosphorus, chromium, iron, antimony, cerium, tin and/or lanthanum; a = 0.5-1.5; b = 0-0.5; x = a number required to satisfy the valencies of the other components and the catalyst in the second bed (B) has formula Bia,Mob, X c, X d, X e, X f, X g, X h, Ox, (II) X = wolfram, vanadium and/or tellurium; X = alkaline earth metal, cobalt, nickel, zinc, manganese, copper, cadmium, tin and/or mercury; X = iron, chromium and/or cerium; X = phosphorus, arsenic, antimony and/or boron; X = alkali metal, thallium and/or tin; X = rare earth metal, titanium, zirconium, niobium, tantalum, rhenium, ruthenium, rhodium, silver, gold, aluminum, gallium, indium, silicon, germanium, thorium and/or uranium; a' = 0.01-8; b' = 0.1-30; c', d' and e' = 0-20; f' = 0-6; g' = 0-4; h' = 0-15 The starting mixture of reactants contains at least 5 volume % propane, at least 15 volume % oxygen and 0-35 volume % inert gas and it passes through layer A first, then through B.

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