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    CATALYTIC GAS-PHASE OXIDATION OF PROPENE TO ACROLEIN
    21.
    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.

    Cleaning cooling apparatus used in the production of (meth)acrylic acid by two-stage catalytic gas phase oxidation involves purging with hot, oxygen-containing gas while increasing the oxygen content in a controlled manner
    25.
    发明专利
    Cleaning cooling apparatus used in the production of (meth)acrylic acid by two-stage catalytic gas phase oxidation involves purging with hot, oxygen-containing gas while increasing the oxygen content in a controlled manner 未知

    公开(公告)号：DE10217326A1

    公开(公告)日：2003-07-17

    申请号：DE10217326

    申请日：2002-04-18

    Applicant: BASF AG

    Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

    IPC: B08B7/00 ,  C07C51/25 ,  C07C57/05 ,  B01J19/00 ,  B08B5/00 ,  B08B9/00

    Abstract: Cooling apparatus used between stages 1 and 2 in the catalytic gas phase oxidation of propene or isobutene to (meth)acrylic acid is cleaned by hot purging with oxygen-containing gas while increasing the oxygen content from 3-5 to 21 vol.% in such a way that the off-gas temperature is always at least 20 degrees C below the temperature limit for the material in the apparatus. A method for cleaning a cooling system with heat transfer surfaces as used in the production of (meth)acrylic acid by 2-stage catalytic gas-phase oxidation of propene or isobutene, i.e. for cooling the gas mixture from reaction zone 1 (production of (meth)acrolein) before it enters zone 2 (production of (meth)acrylic acid). This involves passing gas with a controllable oxygen content through the cooler with the heat transfer surfaces at a temperature of at least 380 degrees C, using an oxygen content which is increased from 3-5 vol.% to 21 vol.% during the cleaning process and regulated in such a way that the temperature of the off-gas from the cooler is always at least 20 degrees C below the maximum temperature allowed by the thermal stability of the material in the cooler.

    26.
    发明专利
    未知

    公开(公告)号：DE10159825A1

    公开(公告)日：2003-06-18

    申请号：DE10159825

    申请日：2001-12-06

    Applicant: BASF AG

    Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

    IPC: B01D53/18 ,  B01D3/20 ,  B01D3/24 ,  C07C51/25 ,  C07C51/44 ,  C07C57/07 ,  B01D3/14 ,  B01D3/32

    Abstract: The invention relates to a riser base (1), which is provided for a column used for thermally treating a liquid and from which liquid is completely drained via a drainage tube (6) located at the edge of the riser base (1). The riser base (1) comprises one or more drainage channels (5) that slope(s) toward the drainage tube (6), and the riser base (1) slopes toward the drainage channel(s) (5).

    27.
    发明专利
    未知

    公开(公告)号：DE10159823A1

    公开(公告)日：2003-06-18

    申请号：DE10159823

    申请日：2001-12-06

    Applicant: BASF AG

    Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

    IPC: F16B2/04 ,  B01D3/14 ,  B01D3/32 ,  F16B2/02 ,  C07C57/07

    Abstract: The invention relates to a clamp (1) for releasably connecting a column plate (4) to a supporting ring (5) in a column, comprising a bolt (2) and a bolt bottom part (3) that is connected to said bolt (2), wherein the bolt bottom part (3) has at least one opening (8) through which a liquid located inside the column can flow out.

    30.
    发明专利
    未知

    公开(公告)号：BR0009000A

    公开(公告)日：2002-01-02

    申请号：BR0009000

    申请日：2000-03-15

    Applicant: BASF AG

    Inventor： OLBERT GERHARD ,  CORR FRANZ ,  REUTER PETER ,  WAMBACH LUDWIG ,  HAMMON ULRICH

    IPC: B01J8/06 ,  B01J19/00 ,  B01J19/24 ,  C07C45/35 ,  C07C45/38 ,  H01Q21/08 ,  B01J8/00

    Abstract: A multitube fixed bed reactor and the use of such a reactor for carrying out catalytic gas-phase reactions, in particular for carrying out exothermic and endothermic catalytic gas-phase reactions such as the preparation of phthalic anhydride (PA), acrylic acid, methacrylic acid (MAA), acrolein, maleic anhydride (MA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA). In a relatively large multitube reactor in which a large amount of heat of reaction is generated owing to the numerous catalyst tubes ( 17 ) and has to be removed, it is proposed that the ratio of tube spacing t to external tube diameter d a be made dependent on the reactor diameter or on the external tube bundle diameter d RBa . At an external diameter of the catalyst tube bundle ( 18 ) of more than 4 meters, a ratio of tube spacing d to external tube diameter d a of at least 1.3 is preferred.

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