中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

68 records (took 0.022 seconds)

    21.
    发明专利
    未知

    公开(公告)号：DE3786220D1

    公开(公告)日：1993-07-22

    申请号：DE3786220

    申请日：1987-09-26

    Applicant: BASF AG

    Inventor： BRENNER KARL ,  EGGERSDORFER MANFRED DR ,  RUPPEL WILHELM DR ,  SCHULTHEISS HARALD DR ,  SCHOLZ HANS-ULRICH DR

    IPC: C07B61/00 ,  B01J23/50 ,  B01J23/52 ,  B01J23/72 ,  C07C45/00 ,  C07C45/29 ,  C07C45/37 ,  C07C45/38 ,  C07C45/39 ,  C07C47/21 ,  C07C49/203 ,  C07C67/00

    Abstract: Continuous prodn. of aliphatic aldehyde and ketones of formula R1-CO-R2 (I) is carried out by oxidn. of an alcohol R1-CH(OH) -R2 (II) with O2 at elevated temp. and in the presence of a catalyst (III), where R1=a satd., or unsatd., linear or branched aliphatic gp. with at least 2C, which can be substd. by alkyl, alkenyl or aryl, or a cycloaliphatic- aliphatic gp.; and R2=H, Me, Ar or as R1; or R1+R2 + the carbonyl C atom = a substd. or unsubstd. 4-12C membered ring, which can have one or more O atoms in the ring. The novel features are that (a) oxidn. is carreid out in a tubular reactor or tube aggregate with tube(s) having an inside dia. of 10-50 mm, (b) the tube(s) is charged with (III) in the form of granular inert material coated with 0.1-20 wt.% Cu, Ag and/or Au; and (c) the ratio of the dia. of the (III) granules to the inside dia. of the tube is 1:10-5.

    22.
    发明专利
    未知

    公开(公告)号：DE3866535D1

    公开(公告)日：1992-01-09

    申请号：DE3866535

    申请日：1988-12-21

    Applicant: BASF AG

    Inventor： AGAR DAVID DR ,  RUPPEL WILHELM DR ,  HOELDERICH WOLFGANG DR ,  DREWS RONALD DR

    IPC: B01D53/86 ,  B01D53/36

    Abstract: Removal of NOx from waste gas (I) by selective redn. with NH3 is carried out in a reaction zone in the presence of catalysts, (I) being supplieo to the reaction zone continuously and the NH3 at intervals. The novel features are a) the direction of (I) is reversed periodically; b) NH3 is added at the start of each period in excess of the stoichoimetric amt. for redn. of NOx; c) the NH3 supply is cut off before unreacted NH3 leaves the reaction zone with (I); and d) the (I) flow is reversed as soon as the NOx and/or NH3 content of (I) leaving the reaction zone exceeds a predetermined value.

    26.
    发明专利
    未知

    公开(公告)号：DE897990C

    公开(公告)日：1953-11-26

    申请号：DEB0001925

    申请日：1950-02-07

    Applicant: BASF AG

    Inventor： RUPPEL WILHELM DR

    29.
    发明专利
    未知

    公开(公告)号：DE19654046A1

    公开(公告)日：1998-06-25

    申请号：DE19654046

    申请日：1996-12-23

    Applicant: BASF AG

    Inventor： FETZER THOMAS DR ,  DEMUTH DIRK DR ,  RUETTER HEINZ DR ,  MENIG HELMUTH DR ,  RESCH PETER DR ,  RUPPEL WILHELM DR ,  WACHE HARRO DR

    IPC: C07B61/00 ,  C07C45/38 ,  C07C45/39 ,  C07C47/127 ,  C07C47/12 ,  C07C47/00 ,  C07C49/00 ,  C07C45/32

    Abstract: The invention relates to a method for producing carbonyl compounds of formula (I), in which R is a hydrogen atom or alkyl radical with between 1 and 3 C atoms; R is a hydrogen atom or a radical of formula (II), in which R is a hydrogen atom or, together with R , an oxygen atom; R is the radical OR or, together with R , an oxygen atom; R is a hydrogen atom, an alkyl radical with between 1 and 8 C atoms or a cyclohexyl or cyclopentyl radical; and R is an alkyl radical with between 1 and 4 C atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula -CH2-CHO or -CH2-CH2-O-CH2-CHO. According to said method, the carbonyl compounds are produced by gas phase oxidation of methanol or alcohols of formula (III), in which R and R have the meaning assigned above and R is a hydrogen atom or an OR radical, and R is a hydrogen atom, an alkyl radical with between 1 and 4 C atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula -CH2-CH2-OH or -CH2-CH2-O-CH2-CH2-OH, with a gas containing oxygen, in the presence of catalysts containing copper and/or silver, and a phosphorus compound which is volatile under reaction conditions in such a quantity that the amount of phosphorus (calculated as P), in relation to the part by weight of alcohol used, is up to 20 ppm. Said method is characterized in that the quantity of phosphorus is added in at least two parts: a) the first part is added with the gaseous starting mixture before the catalyst bed, and b) at least one other part is added in the catalyst bed.

    30.
    发明专利
    未知

    公开(公告)号：ES2112591T3

    公开(公告)日：1998-04-01

    申请号：ES95113509

    申请日：1995-08-29

    Applicant: BASF AG

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

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

    Abstract: 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 of >/=95 mol % and an acrylic acid formation selectivity of >/=90 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 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 DEG to 10 DEG C. between the point of entry into the reactor and the point of exit out of the reactor.

Patent Agency Ranking