中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

141 records (took 0.032 seconds)

    Gas phase oxidation of propylene to acrylic acid using ring-shaped multi-metal oxide catalyst of specified geometry to maximize selectivity and space-time yield
    127.
    发明专利
    Gas phase oxidation of propylene to acrylic acid using ring-shaped multi-metal oxide catalyst of specified geometry to maximize selectivity and space-time yield 未知

    公开(公告)号：DE19927624A1

    公开(公告)日：2000-12-21

    申请号：DE19927624

    申请日：1999-06-17

    Applicant: BASF AG

    Inventor： UNVERRICHT SIGNE ,  ARNOLD HEIKO ,  TENTEN ANDREAS ,  HAMMON ULRICH ,  NEUMANN HANS-PETER ,  HARTH KLAUS

    IPC: C07C45/35 ,  C07C57/055 ,  C07C57/05 ,  B01J23/887

    Abstract: Gas phase oxidation of propylene into acrylic acid in which the mixture of reaction gas is oxidized on a first fixed-bed catalyst and the mixture of product gas which contain acrolein oxidized on a second fixed-bed catalyst. The catalyst shaped bodies comprise an annular geometry in both reaction steps. Gas-phase oxidation of propylene in a one-stage reaction to acrolein and/or acrylic acid or in a two-stage reaction to acrylic acid is such that (i) the initial charge in both cases is \- 160 Nl propylene/l catalyst hour; (ii) the charge to the 2nd stage (if used) includes \- 140 NL acrolein/l catalyst hour ; and (iii) the catalyst or catalysts is/are of ring form with an outer diameter 2-11 mm, length 2-11 mm and a wall-thickness 1-5 mm. The process comprises (A) feeding a mixture of propylene, molecular oxygen and an inert gas with molar ratio O2 : C3H6 \- 1 at high temperature over a solid bed catalyst with characteristics (i) and (iii) above and comprising a multi-metal oxide containing Mo and/or W together with Bi, Te, Sb, Sn and/or Cu such that the propylene conversion and the combined selectivity for acrolein and the acrylic acid by-product are both \- 90 mol.%; and optionally (B) cooling the acrolein-containing gas product and optionally adding molecular O2 and/or inert gas prior to passing it at high temperature and with molar ratio O2 : acrolein \- 0.5 over a Mo- and V-containing multi-metal oxide solid bed catalyst such that the acrolein conversion is \- 90 mol.% and the combined two-stage acrylic acid selectivity (based on propylene conversion) is \- 80 mol.%.

    Multimetal oxide materials
    128.
    发明专利
    Multimetal oxide materials 未知

    公开(公告)号：SG75800A1

    公开(公告)日：2000-10-24

    申请号：SG1996010394

    申请日：1996-07-31

    Applicant: BASF AG

    Inventor： TENTEN ANDREAS ,  HIBST HARTMUT ,  MAROSI KASZLO

    IPC: B01J23/88 ,  B01J23/00 ,  B01J23/887 ,  B01J23/888 ,  B01J35/00 ,  C01G31/00 ,  C01G39/00 ,  C07B61/00 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055 ,  B01J23/885

    Abstract: Multi-metal oxide compsn. of general formula ÄAÜpÄBÜq (I) is new (where, A = Mo12Va(X b)(X c)(X d)X e)(X f )(X g)Ox, B = X 12CuhHiOy (promoter phase); X = W, Nb, Ta, Cr and/or Ce; X = Cu, Ni, Co, Fe, M n and/or Zn; X = Sb and/or Bi; X = Li, Na, K, Rb, Cs and/or H; X = Mg, Ca, Sr and/or Br; X = Si, Al, Ti and/or Zr; X = Mo, W, V, Nb and/or Ta; a = 1-8; b = 0.2-5; c = 0-23; d = 0-50; e = 0-2; f = 0-5; g = 0-50; h = 4-30; i = 0-20; x, y = values determining the valency and frequency of elements different from oxygen in the compsn.; and p, q = values other than zero, whose ratio p/q = 160-1:1. The proportions of (A)p and (B)q are in the form of chemical compsns. differing from their local environment. A and B are distributed relative to each other such as a mixt. of finely divided A and finely divided B, with the proviso that B contains crystals B* of oxometallates of formula CuMoaWbVcNbdTeOy (II) (where, a/(A+B+C+D+E)=0.7-1.3; (B+C+D+E)/A = 0.01-1; and Y = a value determined by the valency and frequency of elements in (II) different from oxygen) of a new structure type (HT-Cu molybdate) defined by the X-ray diffraction pattern: d(A)=6.79+/-0.3; 3.56+/-0.3; 3.54+/-0.3, 3.40+/-0.3; 3.04+/-0.3, 2.96+/-0.3; 2.67+/-0.2; 2.66+/-0.2; 2.56+/-0.2, 2.36+/-0.2; 2.35+/-0.2; 2.27+/-0.2; 2.00+/-0.2;1.87+/-0.3; 1.70+/-0.2; 1.64+/-0.2; 1.59+/-0.2; 1.57+/-0.2; 1.57+/-0.2; 1.55+/-0.2; 1.51+/-0.2; 1.44+/-0.2. Also claimed are: (i) the oxometallates of formula (II); (ii) mixt. of oxometallates (II); (iii) prodn. of the multi-metal oxide compsn..

Patent Agency Ranking