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    CATALYTIC GAS-PHASE OXIDATION OF PROPENE TO ACROLEIN
    31.
    发明专利
    CATALYTIC GAS-PHASE OXIDATION OF PROPENE TO ACROLEIN 未知

    公开(公告)号：MY117281A

    公开(公告)日：2004-06-30

    申请号：MYPI9502666

    申请日：1995-09-08

    Applicant: BASF AG

    Inventor： RUPPEL WILHELM ,  WEGERLE ULRIKE ,  TENTEN ANDREAS ,  HAMMON ULRICH

    IPC: B01J23/88 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  B01J23/887 ,  B01J27/132 ,  B01J27/192 ,  C07B61/00 ,  C07C45/35 ,  C07C47/22

    Abstract: A PROCESS FOR THE CATALYTIC GAS-PHASE OXIDATION OF PROPENE TO ACROLEIN IN A MULTIPLE CONTACT TUBE FIXED-BED REACTOR THROUGH WHOSE SPACE SURROUNDING THE CONTACT TUBES ONLY ONE HEAT-EXCHANGE MEDIUM CIRCUIT IS PASSED, AT ELEVATED TEMPERATURE ON CATALYTICALLY ACTIVE MULTIMETAL OXIDES WITH A PROPENE CONVERSION FOR A SINGLE PASS OF > 90 MOLAND AN ACROLEIN FORMATION SELECTIVITY OF > 85 MOL, WHICH COMPRISES FIRSTLY PASSING THE HEAT-EXCHANGE MEDIUM THROUGH THE MULTIPLE CONTACT TUBE FIXED-BED REACTOR LONGITUDINALLY, CONSIDERED OVER THE REACTION CONTAINER AS A WHOLE, TO THE CONTACT TUBES IN COCURRENT TO THE REACTION-GAS MIXTURE AND SECONDALY SUPERPOSING A TRANSVERSE FLOW WITHIN THE REACTION CONTAINER BY MEANS OF AN ARRANGEMENT OF SUCCESSIVE BAFFLES ALONG THE CONTACT TUBES WHICH LEAVES PASSAGE CROSS SECTION FREE, SO AS TO GIVE A MEANDROUS FLOW OF THE HEAT-EXCHANGE MEDIUM, SEEN IN LONGITUDINAL SECTION THROUGH THE CONTACT TUBE BUNDLE, AND SETTING THE FLOW RATE OF THE CIRCULATED HEAT-EXCHANGE MEDIUM SO THAT ITS TEMPERATURE RISES BY FROM 2 TO 10° BETWEEN THE POINT OF ENTRY INTO THE REACTOR AND THE POINT OF EXIT OUT OF THE REACTOR.

    33.
    发明专利
    未知

    公开(公告)号：BR0109070A

    公开(公告)日：2003-06-03

    申请号：BR0109070

    申请日：2001-03-06

    Applicant: BASF AG

    Inventor： WEIGUNY JENS ,  STORCK SEBASTIAN ,  TENTEN ANDREAS ,  RUPPEL WILHELM

    IPC: C07D307/60 ,  B01J27/28 ,  B01J38/04 ,  C07B61/00 ,  C07C51/215

    Abstract: In a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of hydrocarbons having at least four carbon atoms using oxygen-containing gases in the presence of a volatile phosphorus compound over a catalyst comprising vanadium, phosphorus and oxygen in a shell-and-tube reactor unit having at least two successive cooled reaction zones, the temperature of the first reaction zone is from 350 to 450° C. and the temperature of the second and further reaction zones is from 350 to 480° C. and the temperature difference between the hottest reaction zone and the coolest reaction zone is at least 2° C.

    35.
    发明专利
    未知

    公开(公告)号：DE10046072A1

    公开(公告)日：2002-03-28

    申请号：DE10046072

    申请日：2000-09-15

    Applicant: BASF AG

    Inventor： STORCK SEBASTIAN ,  WEIGUNY JENS ,  TENTEN ANDREAS

    IPC: B01J27/198 ,  B01J37/16 ,  C07C51/215 ,  C07F11/00 ,  B01J31/12 ,  C07D307/60

    Abstract: The invention relates to a method for producing a catalyst precursor containing vanadium, phosphorus and oxygen, for producing maleic acid anhydride by heterogeneously catalytic gas phase oxidation of a hydrocarbon with at least four carbon atoms, by reacting a pentavalent vanadium compound with a pentavalent phosphorus compound in the presence of an alcohol with a reducing action. According to the inventive method, (i) the alcohol with the reducing action is an alcohol of general formula (I), wherein the radicals R1 and R2, independently of each other, mean hydrogen, C1-to C9-alkyl or C1- to C9-hydroxyalkyl and the radical R3 means C1-to C9-alkyl or C1- to C9-hydroxyalkyl; (ii) the reaction is carried out without adding modifiers and co-reduction agents selected from the following series: hydrogen halide, sulphur dioxide, fuming sulphuric acid and tensides; and (iii) bringing together the pentavalent vanadium compound, the pentavalent phosphorus compound and the alcohol with the reducing action, forming the catalyst precursor by heating and isolating the same. The invention also relates to a catalyst precursor that can be obtained using this method, to a method for producing a catalyst from the catalyst precursor, to a catalyst that can be obtained using this method and to a method for producing maleic acid anhydride on this catalyst.

    Method for producing maleic acid anhydride
    40.
    发明专利
    Method for producing maleic acid anhydride 未知

    公开(公告)号：AU5036301A

    公开(公告)日：2001-09-24

    申请号：AU5036301

    申请日：2001-03-06

    Applicant: BASF AG

    Inventor： WEIGUNY JENS ,  STORCK SEBASTIAN ,  TENTEN ANDREAS ,  RUPPEL WILHELM

    IPC: C07D307/60 ,  B01J27/28 ,  B01J38/04 ,  C07B61/00 ,  C07C51/215

    Abstract: In a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of hydrocarbons having at least four carbon atoms using oxygen-containing gases in the presence of a volatile phosphorus compound over a catalyst comprising vanadium, phosphorus and oxygen in a shell-and-tube reactor unit having at least two successive cooled reaction zones, the temperature of the first reaction zone is from 350 to 450° C. and the temperature of the second and further reaction zones is from 350 to 480° C. and the temperature difference between the hottest reaction zone and the coolest reaction zone is at least 2° C.

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