83.
    发明专利
    未知

    公开(公告)号:ID28000A

    公开(公告)日:2001-05-03

    申请号:ID20002517

    申请日:1999-06-02

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing shell catalysts for the catalytic vapor-phase oxidation of aromatic carboxylic acids and/or carboxylic acid anhydrides comprised of a supporting core and of catalytically active metal oxides which are deposited in a shell-shaped manner on said supporting core. The inventive catalysts are obtained by spraying an aqueous active mass suspension, said suspension containing the active metal oxides, at higher temperatures onto the hot supporting material which has a temperature ranging from 50 to 450° C. The aqueous active mass suspension contains 1 to 10 wt. %, with regard to the solid content of the active mass suspension, a binding agent comprised of A) a polymerizate obtained by radical polymerization, containing 5 to 100 wt. % of monomers (a) in the form of ethylenically unsaturated acid anhydrides or ethylenically unsaturated dicarboxylic acids whose carboxyl groups can form an anhydride and containing 0 to 95 wt. % monoethylenically unsaturated monomers (b) with the provision that the monomers (a) and (b) comprise, on average, a maximum of 6 carbon atoms which are not functionalized with groups containing oxygen, and of B) an alkanolamine having at least 2 OH groups, a maximum of 2 nitrogen atoms and a maximum of 8 C-atoms, whereby the weight ratio A:B ranges from 1:0.05 to 1:1.

    85.
    发明专利
    未知

    公开(公告)号:DE19815279A1

    公开(公告)日:1999-10-07

    申请号:DE19815279

    申请日:1998-04-06

    Applicant: BASF AG

    Abstract: The invention relates to multi-metal oxide compounds with a 2-component structure, containing molybdenum, hydrogen, one or more of the elements phosphor, arsenic, boron, germanium and silicon, one or more of the elements copper, zinc, cobalt and iron, and the element antimony. The invention also relates to the use of said compounds for producing methacrylic acid by means of a gas phase catalytic oxidation process.

    87.
    发明专利
    未知

    公开(公告)号:BRPI0410759B1

    公开(公告)日:2014-03-04

    申请号:BRPI0410759

    申请日:2004-05-21

    Applicant: BASF AG

    Abstract: A description is given of a process for preparing aldehydes, carboxylic acids and/or carboxylic anhydrides, in particular phthalic anhydride, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed at elevated temperature over a bed of a first catalyst and a bed which is made up of a second catalyst having a higher activity than the first catalyst and is located downstream of the first catalyst in the flow direction of the gaseous stream, wherein the catalytically active composition of the first catalyst comprises at least vanadium oxide, titanium dioxide and antimony oxide and the ratio of vanadium, calculated as V 2 O 5 , to antimony, calculated as Sb 2 O 3 , in the first catalyst is from 3.5:1 to 5:1. The source of antimony oxide used for the first catalyst is preferably particulate antimony trioxide having a mean particle size of from 0.5 to 5 mum. The process allows the desired oxidation products to be obtained in high yield over longer periods of time.

    Production of aldehydes, carboxylic acids, and/or carboxylic acid anhydrides by means of catalysts containing vanadium oxide, titanium dioxide, and antimony oxide

    公开(公告)号:ZA200510405B

    公开(公告)日:2008-06-25

    申请号:ZA200510405

    申请日:2005-12-22

    Applicant: BASF AG

    Abstract: A description is given of a process for preparing aldehydes, carboxylic acids and/or carboxylic anhydrides, in particular phthalic anhydride, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed at elevated temperature over a bed of a first catalyst and a bed which is made up of a second catalyst having a higher activity than the first catalyst and is located downstream of the first catalyst in the flow direction of the gaseous stream, wherein the catalytically active composition of the first catalyst comprises at least vanadium oxide, titanium dioxide and antimony oxide and the ratio of vanadium, calculated as V 2 O 5 , to antimony, calculated as Sb 2 O 3 , in the first catalyst is from 3.5:1 to 5:1. The source of antimony oxide used for the first catalyst is preferably particulate antimony trioxide having a mean particle size of from 0.5 to 5 mum. The process allows the desired oxidation products to be obtained in high yield over longer periods of time.

    SISTEMAS CATALIZADORES DE TRES O CUATRO CAPAS PARA LA PRODUCCION DE ANHIDRIDO DEL ACIDO FTALICO.

    公开(公告)号:ES2290712T3

    公开(公告)日:2008-02-16

    申请号:ES04733250

    申请日:2004-05-15

    Applicant: BASF AG

    Abstract: Sistema catalizador para la producción de anhídrido del ácido ftálico, que presenta al menos tres capas de catalizador dispuestas una sobre otra en el tubo de reacción, cuya actividad catalizadora aumenta de capa en capa y cuya masa activa contiene del 70 al 99% en peso de dióxido de titanio en la modificación anatasa, (i) presentando el catalizador menos activo sobre el material de soporte del 7 al 10% en peso, con respecto al catalizador total, de masa activa, que contiene del 6 al 11% en peso de V2O5, del 0 al 3% en peso de Sb2O3, del 0, 1 al 1% en peso de álcali (calculado como metal alcalino) y como resto TiO2 en forma anatasa con una superficie BET de desde 5 hasta 30 m2/g, (ii) presentando el siguiente catalizador más activo sobre el material de soporte del 7 al 12% en peso, con respecto al catalizador total, de masa activa, que contiene del 5 al 13% en peso de V2O5, del 0 al 3% en peso de Sb2O3, del 0 al 0, 4% en peso de P, del 0 al 0, 4% en peso de álcali (calculado como metal alcalino) y como resto TiO2 en forma anatasa con una superficie BET de desde 10 hasta 40 m2/g, (iii) presentando el catalizador más activo sobre el material de soporte del 8 al 12% en peso, con respecto al catalizador total, de masa activa, que contiene del 5 al 30% en peso de V2O5, del 0 al 3% en peso de Sb2O3, del 0, 05 al 0, 4% en peso de P, del 0 al 0, 3% en peso de álcali (calculado como metal alcalino) y como resto TiO2 en forma anatasa con una superficie BET de desde 15 hasta 50 m2/g, con la condición de que la superficie BET del dióxido de titanio en la capa (i) superior sea menor que la superficie BET del dióxido de titanio en la o las capa(s) (ii) intermedia(s) y la superficie BET del dióxido de titanio en la capa (iii) inferior sea mayor que la superficie BET del dióxido de titanio en la o las capa(s) intermedia(s).

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