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    METHOD FOR PRODUCING MALEIC ACID ANHYDRIDE
    43.
    发明专利
    METHOD FOR PRODUCING MALEIC ACID ANHYDRIDE 未知

    公开(公告)号：MY128287A

    公开(公告)日：2007-01-31

    申请号：MYPI20010925

    申请日：2001-03-01

    Applicant: BASF AG

    Inventor： WEIGUNY JENS DR ,  STORCK SEBASTIAN DR RER NAT ,  TENTEN ANDREAS DR ,  RUPPEL WILHELM DR

    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 (2) 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.(FIG 1A)

    Process of catalytic oxidation of propylene to acrolein in gaseous phase
    44.
    发明专利
    Process of catalytic oxidation of propylene to acrolein in gaseous phase 未知

    公开(公告)号：CZ294399B6

    公开(公告)日：2004-12-15

    申请号：CZ229395

    申请日：1995-09-07

    Applicant: BASF AG

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

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

    Abstract: In the present invention, there is described a process of catalytic oxidation of propylene to acrolein in gaseous phase wherein a gas-phase mixture of propene and oxygen is catalytically oxidized by passing a reactant gas mixture comprising propene and oxygen through a plurality of catalyst containing contact tubes in a fixed bed reactor and simultaneously passing only one heat-exchange medium at elevated temperature over the exterior surfaces of the contact tubes in a longitudinal flow pattern which is co-current with the direction of flow of the reactants through said tube; simultaneously superposing a transverse flow on said longitudinal flow of heat exchange medium by means of an arrangement of successive baffles along the contact tubes which leave passage cross-sections free, thereby resulting in a meandrous flow of the heat-exchange medium through the reactor and setting the flow rate of said heat-exchange medium so that its temperature between the point of entry of the medium into the reactor and its point of exit increases by 2 to 10 degC.

    46.
    发明专利
    未知

    公开(公告)号：ES2169457T3

    公开(公告)日：2002-07-01

    申请号：ES98108692

    申请日：1998-05-13

    Applicant: BASF AG

    Inventor： AQUILA WERNER DR ,  FUCHS HARTWIG ,  WORZ OTTO DR ,  RUPPEL WILHELM DR ,  HALBRITTER KLAUS DR

    IPC: B01J23/52 ,  B01J8/02 ,  B01J8/08 ,  C07B61/00 ,  C07C45/38 ,  C07C45/67 ,  C07C47/21 ,  C07C47/22

    Abstract: Continuous technical preparation of aldehydes of formula (I) comprises dehydration of the corresponding alcohol of formula (II) with an oxygen-containing gas using a catalyst based on copper, silver and/or gold on an inert carrier in a multi-pipe reactor. This is followed by rapid cooling of the reaction gases, separation of the aldehyde from the resulting condensate and recycling of any unreacted alcohol. During the process (II) is vapourised, the alcohol vapour is mixed with the oxygen-containing gas, the resulting vapour is passed through a 0.5 cm layer of the catalyst at a temperature that is greater than the boiling point of the alcohol but lower than the starting temperature of the reaction and the vapour is then allowed to pass through a number of parallel pipes which are filled with catalyst and kept warm by a circulating fluid. The pipes have an inner diameter, D, of 0.5-3 cm and are at least 5 cm long and the reaction temperature is 300-600 degrees C. R1R2CHO (I) R1R2CH-CH2-OH (II) R1 = H and R2 = CH2=C(CH3)- (isoprenal); or R1+R2 = (CH3)2C= (prenal)

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