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    85.
    发明专利
    未知

    公开(公告)号：DE10065473A1

    公开(公告)日：2002-07-04

    申请号：DE10065473

    申请日：2000-12-28

    Applicant: BASF AG

    Inventor： BENDER MICHAEL ,  UNVERRICHT SIGNE

    IPC: F01N3/20 ,  F01N13/02 ,  F02M63/02 ,  F01N3/08

    Abstract: Process for catalytically converting fuel to remove nitrogen oxides from I.C. engine exhaust gases comprises feeding the fuel and a partial stream of the exhaust gas separately into a converter; and vaporizing the fuel. An Independent claim is also included for a converter for catalytically converting fuel comprising a vaporization chamber connected to a conversion chamber. The vaporization chamber has feeds for exhaust gas or feed gas and fuel. The conversion chamber contains a catalyst for catalytically converting the fuel. The chambers are connected together so that heat can be transported from the conversion chamber to the vaporization chamber. Preferred Features: The fuel is dehyrogenated or partially oxidized to carboxylic acids and/or carboxylic acid anhydrides. The catalyst is gamma -Al2O3.

    Production of catalyst with shell of catalytically-active oxide used e.g. in gas phase oxidation of propene to acrolein uses support with ring geometry
    86.
    发明专利
    Production of catalyst with shell of catalytically-active oxide used e.g. in gas phase oxidation of propene to acrolein uses support with ring geometry 未知

    公开(公告)号：DE10059713A1

    公开(公告)日：2002-06-06

    申请号：DE10059713

    申请日：2000-12-01

    Applicant: BASF AG

    Inventor： PETZOLDT JOCHEN ,  UNVERRICHT SIGNE ,  ARNOLD HEIKO

    IPC: B01J23/887 ,  B01J37/02 ,  C07C45/35 ,  C07C47/22

    Abstract: Production of catalyst with support having ring geometry and shell of catalytically-active oxide (I) containing molybdenum, bismuth, iron plus cobalt and/or nickel and optionally other elements involves producing dry mixture of starting materials for (I), thermal treatment at 150-350 deg C to give precursor mass, moistening support with water, contacting with mass to form coating, drying and calcination at 400-600 deg C. Production of a catalyst with support having ring geometry and shell of catalytically-active oxide of formula (I), containing molybdenum (Mo), bismuth (Bi), iron (Fe) plus cobalt (Co) and/or nickel (Ni) and optionally other elements, by producing intimate dry mixture of starting materials for (I), thermal treatment at 150-350 deg C to give precursor mass, moistening support with water, contacting it with this mass to form coating, drying and calcination at 400-600 deg C. X = cobalt (Co) and/or nickel (Ni); X = silicon (Si) and/or aluminum (Al); X = lithium (Li), sodium (Na), potassium (K), cesium (Cs) and/or rubidium (Rb); a = 0.2-1; b = 2-10; c = 0.5-10; d = 0-10; e = 0-0.5; y = value giving neutral charge, depending on valency and frequency of elements other than oxygen (O). An Independent claim is also included for catalysts produced in this way.

    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
    90.
    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：DE19948241A1

    公开(公告)日：2001-04-12

    申请号：DE19948241

    申请日：1999-10-07

    Applicant: BASF AG

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

    IPC: B01J23/887 ,  C07C45/35 ,  C07C51/25 ,  B01J23/28 ,  B01J23/30 ,  B01J23/31 ,  B01J23/888 ,  B01J27/057 ,  C07C47/22

    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.%.

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