33.
    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).

    38.
    发明专利
    未知

    公开(公告)号:BRPI0413184A

    公开(公告)日:2006-10-03

    申请号:BRPI0413184

    申请日:2004-07-30

    Applicant: BASF AG

    Abstract: A catalyst for gas-phase oxidations which comprises an inert support and a catalytically active composition comprising transition metal oxides applied thereto, or a precatalyst, is described. The (pre)catalyst is obtained by treating the inert support with an aqueous suspension or solution of the transition metal oxides or their precursor compounds, where the suspension contains a binder dispersion and the binder is a copolymer of an alpha-olefin and a vinyl-C 2 -C 4 -carboxylate whose vinyl C 2 -C 4 -carboxylate content is at least 62 mol %.

    40.
    发明专利
    未知

    公开(公告)号:BRPI0410551A

    公开(公告)日:2006-06-20

    申请号:BRPI0410551

    申请日:2004-05-15

    Applicant: BASF AG

    Abstract: The invention relates to a process for preparing phthalic anhydride, in which the catalytic gas-phase oxidation of o-xylene and/or naphthalene is carried out over at least three zones of catalysts of increasing activity, with only the last zone of the catalyst system containing phosphorus and the last zone also comprising at least 10% by weight of vanadium (calculated as V 2 O 5 ) based on the active composition of the catalyst and having a ratio of vanadium (calculated as V 2 O 5 ) to phosphorus of greater than 35.

Patent Agency Ranking