中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

181 records (took 0.021 seconds)

    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
    102.
    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 %.

    104.
    发明专利
    未知

    公开(公告)号：DE19851786A1

    公开(公告)日：2000-05-11

    申请号：DE19851786

    申请日：1998-11-10

    Applicant: BASF AG

    Inventor： HEIDEMANN THOMAS ,  HIBST HARTMUT ,  BAUER STEFAN ,  DIETRICH ULF

    IPC: C07D307/89 ,  B01J23/68 ,  B01J35/06 ,  B01J37/02 ,  C01G1/00 ,  C01G31/00 ,  C01G39/00 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31

    Abstract: Polymetal oxide of general formula (I): Aga-bMbV2Ox * c H2O, whereby M is a metal selected from the group of Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Cd, Pb, Cr, Au, Al, Fe, Co, Ni and/or Mo, a has a value of 0.3-1.9 and, b a value of 0-0.5 with the proviso that the difference (a-b)>/=0.1, c has a value of 0-20 und x is a number that is determined by the valence and frequency of elements different from oxygen in formula (I). The polymetal oxide has a crystalline structure that results in a powder x-ray diagram with diffraction reflexes for lattice differences of d 15.23 +/- 0.6, 12.16 +/- 0.4, 10.68 +/- 0.3, 3.41 +/- 0.4, 3.09 +/- 0.4, 3.02 +/- 0.4, 2.36 +/- 0,4 and 1.80 +/- 0.4 ANGSTROM . The invention also relates to precatalysts and catalysts for the partial oxidation of aromatic hydrocarbons.

    Multimetal oxides
    106.
    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.

    108.
    发明专利
    未知

    公开(公告)号：BR9402435A

    公开(公告)日：1995-01-24

    申请号：BR9402435

    申请日：1994-06-15

    Applicant: BASF AG

    Inventor： SOPHER DAVID WILLIAN ,  GIESELER ANDREAS ,  HIBST HARTMUT ,  HARTH KLAUS ,  JAEGER PETER

    IPC: C25B3/29 ,  C25B11/00 ,  C25B3/10

    Abstract: Electrodes prodn. comprises applying an electroconductive coating on an electroconductive core. Also claimed is the use of the electrode in the reductive coupling of olefins, the electrode esp. being used as cathode in the electro-hydrodimerisation of olefins of formula (I). R R C=CR X (I) In (I), R -R are H or 1-4C alkyl and X is -CN, -CONR R or -COOR .

Patent Agency Ranking