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    Production of methacrylic acid from isobutane comprises formation of methacrolein using a specified molar ratio of oxygen to nitrogen followed by further oxidation to methacrylic acid.
    17.
    发明专利
    Production of methacrylic acid from isobutane comprises formation of methacrolein using a specified molar ratio of oxygen to nitrogen followed by further oxidation to methacrylic acid. 未知

    公开(公告)号：DE10219685A1

    公开(公告)日：2003-11-13

    申请号：DE10219685

    申请日：2002-05-02

    Applicant: BASF AG

    Inventor： BERNDT SILKE ,  MUELLER-ENGEL KLAUS ,  SCHINDLER GOETZ-PETER ,  ROSOWSKI FRANK ,  PETZOLDT JOCHEN

    IPC: C07C51/25 ,  C07C57/05

    Abstract: Production of methacrylic acid from isobutane comprises partial dehydrogenation of isobutane, separation of isobutane and isobutene and catalyzed partial oxidation of isobutene with molecular oxygen in the gas phase to form a methacrolein containing product mixture. A process for the production of methacrylic acid from isobutane comprises: (A) partial, selective, heterogeneously catalyzed dehydrogenation of isobutane in the gas phase in a reaction zone (A) to form a mixture of isobutene and unreacted isobutane; (B) transport of the gas mixture to a reaction zone (B) followed by a selective heterogeneously catalyzed partial oxidation with molecular oxygen in the gas phase to form a methacrolein containing product mixture whereby the molar conversion of isobutene is at least 95 mol.% (C) the methacrolein containing product mixture from (B) is transferred to a reaction zone (C), without separation of the components, to undergo a selective heterogeneously catalyzed partial oxidation with molecular oxygen in the gas phase to form a methacrylic acid containing product mixture and is characterized in that components in the reaction mixture from (A) other than isobutane and isobutene are separated off to at least 80 mol.% and that the molar ratio of molecular oxygen to molecular nitrogen in reaction zone (B) is 1:1-1:10.

    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
    18.
    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：DE10049873A1

    公开(公告)日：2002-04-11

    申请号：DE10049873

    申请日：2000-10-10

    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.

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