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    41.
    发明专利
    未知

    公开(公告)号：DE50301926D1

    公开(公告)日：2006-01-19

    申请号：DE50301926

    申请日：2003-03-12

    Applicant: BASF AG

    Inventor： WEIGUNY JENS ,  STORCK SEBASTIAN ,  DUDA MARK ,  DOBNER CORNELIA ,  FELDER RAIMUND

    IPC: C07D307/60 ,  B01J27/198 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/08 ,  B01J37/14 ,  B01J37/18 ,  C07C51/215 ,  C07C51/25

    Abstract: Disclosed is a method for producing a catalyst containing vanadium, phosphorus, and oxygen, which is used for oxidizing the gas phase of a hydrocarbon having at least four carbon atoms to maleic anhydride. According to the inventive method, a corresponding catalyst precursor which contains vanadium, phosphorus, and oxygen and is provided with particles having an average diameter of at least 2 mm is converted into a catalytically active form by means of calcination, and a flow of the catalyst precursor is transported on a conveyor belt across at least one calcination area over a distance 1 n at an essentially steady speed in order to be calcinated. The variation over time of the gas temperature in relation to the set point value amounts to n /2 of the calcination area, while the local difference in the gas temperature between any positions in the area of the flow of the catalyst precursor, which is located within the second half 1 n /2 of the calcination area, amounts to

    44.
    发明专利
    未知

    公开(公告)号：DE10323817A1

    公开(公告)日：2004-12-09

    申请号：DE10323817

    申请日：2003-05-23

    Applicant: BASF AG

    Inventor： NETO SAMUEL ,  ZUEHLKE JUERGEN ,  STORCK SEBASTIAN ,  ROSOWSKI FRANK

    IPC: C07C51/265 ,  C07C51/31 ,  C07D307/89 ,  B01J27/186

    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.

    46.
    发明专利
    未知

    公开(公告)号：DE10211446A1

    公开(公告)日：2003-10-02

    申请号：DE10211446

    申请日：2002-03-15

    Applicant: BASF AG

    Inventor： WEIGUNY JENS ,  STORCK SEBASTIAN ,  DUDA MARK ,  FELDER RAIMUND ,  DOBNER CORNELIA

    IPC: C07D307/60 ,  B01J27/198 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/08 ,  B01J37/14 ,  B01J37/18 ,  C07C51/215 ,  C07C51/25

    Abstract: Disclosed is a method for producing a catalyst containing vanadium, phosphorus, and oxygen, which is used for oxidizing the gas phase of a hydrocarbon having at least four carbon atoms to maleic anhydride. According to the inventive method, a corresponding catalyst precursor which contains vanadium, phosphorus, and oxygen and is provided with particles having an average diameter of at least 2 mm is converted into a catalytically active form by means of calcination, and a flow of the catalyst precursor is transported on a conveyor belt across at least one calcination area over a distance 1 n at an essentially steady speed in order to be calcinated. The variation over time of the gas temperature in relation to the set point value amounts to n /2 of the calcination area, while the local difference in the gas temperature between any positions in the area of the flow of the catalyst precursor, which is located within the second half 1 n /2 of the calcination area, amounts to

    Production of aldehydes, carboxylic acids, and/or carboxylic acid anhydrides by means of catalysts containing vanadium oxide, titanium dioxide, and antimony oxide
    50.
    发明专利
    Production of aldehydes, carboxylic acids, and/or carboxylic acid anhydrides by means of catalysts containing vanadium oxide, titanium dioxide, and antimony oxide 未知

    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

    Inventor： ROSOWSKI FRANK ,  STORCK SEBASTIAN ,  ZUHLKE JURGEN ,  NETO SAMUEL

    IPC: C07C20090101 ,  C07C51/265 ,  C07C51/31

    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.

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