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    31.
    发明专利
    未知

    公开(公告)号：AT354559T

    公开(公告)日：2007-03-15

    申请号：AT03706423

    申请日：2003-02-04

    Applicant: BASF AG

    Inventor： STORCK SEBASTIAN ,  ROSOWSKI FRANK ,  BAIER MICHAEL ,  TENTEN ANDREAS ,  WOLF HANS-JOSEF

    IPC: C07D307/89 ,  B01J23/22 ,  B01J35/00 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31 ,  C07C63/16

    Abstract: Production of phthalic anhydride by gas-phase oxidation of o-xylene or naphthalene in a tubular reactor involves using three or more different catalyst beds with controlled hot-spot temperatures. A method for the production of phthalic anhydride (I) by gas-phase oxidation of xylene and/or naphthalene in a thermostatted tube-bank reactor on 3 or more solid-bed catalysts in 3 different layers involves carrying out the process in such a way that the peak temperature (T2) in the second catalyst layer (in the direction of flow) is up to 50 degrees C below the peak temperature (T1) in the first layer and the peak temperature (T3) in the third layer is 30-100 degrees C below T1.

    32.
    发明专利
    未知

    公开(公告)号：BRPI0410759A

    公开(公告)日：2006-06-27

    申请号：BRPI0410759

    申请日：2004-05-21

    Applicant: BASF AG

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

    IPC: C07C51/265 ,  C07C51/31 ,  C07C63/16

    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.

    35.
    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.

    39.
    发明专利
    未知

    公开(公告)号：BRPI0410551B1

    公开(公告)日：2014-11-18

    申请号：BRPI0410551

    申请日：2004-05-15

    Applicant: BASF AG

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

    IPC: C07C51/31 ,  C07C51/21 ,  C07C51/265 ,  C07D307/89

    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.

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