中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

11 records (took 0.024 seconds)

    Partial gas phase oxidation of acrolein to acrylic acid or methacrolein to methacrylic acid, useful e.g. as monomer to prepare polymers, comprises using a tube bundle reactor in reaction tube of a vertically arranged reaction tubes
    4.
    发明专利
    Partial gas phase oxidation of acrolein to acrylic acid or methacrolein to methacrylic acid, useful e.g. as monomer to prepare polymers, comprises using a tube bundle reactor in reaction tube of a vertically arranged reaction tubes 未知

    公开(公告)号：DE102007019597A1

    公开(公告)日：2008-05-15

    申请号：DE102007019597

    申请日：2007-04-24

    Applicant: BASF AG

    Inventor： HAMMON ULRICH ,  FRIESE THORSTEN ,  PETZOLDT JOCHEN ,  MUELLER-ENGEL KLAUS JOACHIM ,  CREMER ULRICH ,  RAICHLE ANDREAS

    IPC: C07C57/055

    Abstract: Process for implementing a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or methacrolein to methacrylic acid in a solid catalyst bed comprises using a tube bundle reactor in reaction tube of a vertically arranged bundle of reaction tubes (9), which are closed by a reactor jacket; where: the both ends of the individual reaction tubes are open and each reaction tubes terminate with its upper end in a passage of a top tube plate sealed above in reactor jacket and with its lower end in a passage of a down tube plate (5) sealed below in reactor jacket. Process for implementing a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or methacrolein to methacrylic acid in a solid catalyst bed comprises using a tube bundle reactor in reaction tube of a vertically arranged bundle of reaction tubes (9), which are closed by a reactor jacket; where: the both ends of the individual reaction tubes are open and each reaction tubes terminate with its upper end in a passage of a top tube plate sealed above in reactor jacket and with its lower end in a passage of a down tube plate (5) sealed below in reactor jacket; the exterior of the reaction tubes, the top and the down tube plate, and the reactor jacket differentiate conjointly to the reaction tube surrounding chamber, and each of the two tube plates is spanned by at least a reactor cover (6) having an opening, with which, in order to set start-up in several respects, to the reaction tubes of the tube bundle reactor, at least an opening (3) in one of the both reactor covers supplies a reaction gas inlet mixture (1) containing >= 3 vol.% of acrolein or methacrolein and additionally molecular oxygen; at least an opening of the other reactor cover discharges by partial gas phase oxidation of the acrolein to acrylic acid or methacrolein to methacrylic acid, where the passage of the product gas mixture (2) containing acrylic acid or methacrylic acid results in the solid catalyst bed, which is present in the reaction tubes; at least a liquid heat exchange medium is supplied on the jacket side of the tube bundle reactor around the reaction tubes in such a manner that each of the two surfaces, which turned to each other, of the two tube plates is moistened by liquid heat exchange medium; the liquid heat exchange medium is inwardly introduced with a temperature T w(in) into the reaction tubes surrounding chamber and is outwardly emitted with the temperature T w(out) from the reaction tubes surrounding chamber; the temperature T w(in) of the liquid heat exchange medium, which moistens the tube plate spanned by the tube cover having the at least one opening, is at least 290[deg] C; the reaction gas inflow mixture entering into the opening has a temperature of = 285[deg] C, and the temperature of the surface of the reactor plate (4) turned to the reactor cover having at least an opening, has a value of = 285[deg] C.

    Heterogeneously catalyzed gas phase partial oxidation of organic compound in fixed catalyst bed involves recovering quality of catalyst bed by replacing its portion, with a catalyst having activity lower than that of the replaced catalyst
    6.
    发明专利
    Heterogeneously catalyzed gas phase partial oxidation of organic compound in fixed catalyst bed involves recovering quality of catalyst bed by replacing its portion, with a catalyst having activity lower than that of the replaced catalyst 未知

    公开(公告)号：DE102006000996A1

    公开(公告)日：2007-07-12

    申请号：DE102006000996

    申请日：2006-01-05

    Applicant: BASF AG

    Inventor： CREMER ULRICH ,  WEGERLE ULRIKE ,  LAQUA GERHARD ,  HAMMON ULRICH ,  MUELLER-ENGEL KLAUS JOACHIM

    IPC: C07B41/08 ,  B01J8/02

    Abstract: Heterogeneously catalyzed gas phase partial oxidation of organic compound with oxygen over fixed catalyst bed involves: recovering quality of the fixed catalyst bed by not replacing entire fixed catalyst bed but only its portion by a replacement fixed catalyst bed part; when increasing operating time is accompanied by increasing reduction in quality of the fixed catalyst bed, such that volume-specific activity of the replacement fixed catalyst bed part is lower than volume-specific activity of replaced fixed catalyst bed part in its freshly installed state. Method for heterogeneously catalyzed gas phase partial oxidation of at least one organic starting compound with molecular oxygen over a fixed catalyst bed freshly installed into a reaction chamber, involving conducting a reaction gas mixture comprising the at least one organic starting compound and the molecular oxygen through the fixed catalyst bed, for partial oxidation; and removing the heat of reaction by indirect heat exchange with a fluid heat carrier conducted outside the reaction chamber, involves: recovering the quality of the fixed catalyst bed by not replacing the entire fixed catalyst bed but only its portion by a replacement fixed catalyst bed part; when increasing operating time is accompanied by an increasing reduction in the quality of the fixed catalyst bed, such that the volume-specific activity of the replacement fixed catalyst bed part is lower than the volume-specific activity of the replaced fixed catalyst bed part in its freshly installed state.

    7.
    发明专利
    未知

    公开(公告)号：BRPI0608407A2

    公开(公告)日：2010-11-16

    申请号：BRPI0608407

    申请日：2006-03-07

    Applicant: BASF AG

    Inventor： PETZOLDT JOCHEN ,  CREMER ULRICH ,  DIETERLE MARTIN

    IPC: B01J8/00 ,  B01J4/00 ,  B01J8/06

    Abstract: A method for filling a reactor with catalyst particles (I) containing an active multi-element oxide material (II) (at least on the surface), involves using catalyst particles containing a substance (III) which is liquid at 20[deg]C and 1 atm. Independent claims are also included for (1) a reactor filled with (I); and (2) a method for the production of acrylic acid by the catalytic gas-phase oxidation of acrolein in such a reactor.

    METHOD FOR FILLING A REACTOR
    8.
    发明专利
    METHOD FOR FILLING A REACTOR 未知

    公开(公告)号：SG160371A1

    公开(公告)日：2010-04-29

    申请号：SG2010015873

    申请日：2006-03-07

    Applicant: BASF AG

    Inventor： PETZOLDT JOCHEN ,  CREMER ULRICH ,  DIETERLE MARTIN

    Abstract: Method for filing a reactor The present invention relates to a process for charging a reactor with a catalyst, to the resulting charged reactors, and to the use thereof for carrying out catalytic gas phase reactions.

Patent Agency Ranking