中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

68 records (took 0.022 seconds)

    CONTINUOUS INDUSTRIAL PRODUCTION OF ALDEHYDE
    1.
    发明专利
    CONTINUOUS INDUSTRIAL PRODUCTION OF ALDEHYDE 失效

    公开(公告)号：JPH10338656A

    公开(公告)日：1998-12-22

    申请号：JP14286798

    申请日：1998-05-25

    Applicant: BASF AG

    Inventor： AQUILA WERNER DR ,  FUCHS HARTWIG ,  WOERZ 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: PROBLEM TO BE SOLVED: To profitably obtain the subject aldehyde in a good yield by subjecting an unsaturated aliphatic alcohol and an oxygen-containing gas to an oxidative dehydrogenation reaction in a bundle reactor. SOLUTION: This method for continuously and industrially producing an aldehyde of formula II comprises passing an oxygen-containing alcohol vapor comprising the vapor of a 3-alkyl-buten-1-ol of formula I (R is H; R is isoprenal, or R and R together forms a prenal group) and an oxygen-containing gas through a silver-carried catalyst layer having a thickness of at least 0.5 cm at a temperature which is higher than the dew point of the alcohol but lower than a reaction-starting temperature, bringing the passed vapor into contact with a silver-carried catalyst in parallel plural reaction pipes each having an inner diameter of about 0.5-3 cm and a length of at least 5 cm and heated with a liquid thermal medium flowing around the reaction pipes at 300-600 deg.C to subject the vapor to an oxidative dehydrogenation reaction, immediately cooling the reaction gas and subsequently separating the aldehyde of formula II from the obtained condensed product.

    Acrolein catalytic oxidation process to acrylic acid in a gaseous phase
    3.
    发明专利
    Acrolein catalytic oxidation process to acrylic acid in a gaseous phase 未知

    公开(公告)号：CZ294400B6

    公开(公告)日：2004-12-15

    申请号：CZ229495

    申请日：1995-09-07

    Applicant: BASF AG

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

    IPC: B01J23/28 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  C07B61/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

    Abstract: In the present invention, there is described a process for the catalytic gas-phase oxidation of acrolein to acrylic acid 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 an acrolein conversion for a single pass and an acrylic acid formation selectivity, 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 co-current to the reaction-gas mixture and secondly superposing a transverse flow within the reaction container by means of an arrangement of successive baffles along the contact tubes which leaves passage cross sections 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 degC.

    5.
    发明专利
    未知

    公开(公告)号：DE19722567A1

    公开(公告)日：1998-12-03

    申请号：DE19722567

    申请日：1997-05-28

    Applicant: BASF AG

    Inventor： AQUILA WERNER DR ,  FUCHS HARTWIG ,  WOERZ 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 ,  B01J23/50

    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)

Patent Agency Ranking