中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.022 seconds)

    3.
    发明专利
    未知

    公开(公告)号：DE102004030164A1

    公开(公告)日：2006-01-19

    申请号：DE102004030164

    申请日：2004-06-22

    Applicant: BASF AG

    Inventor： KNOESCHE CARSTEN ,  WOELFERT ANDREAS ,  DAIS ANDREAS

    IPC: C07C263/10 ,  C07C265/14

    Abstract: The invention relates to a process for preparing isocyanates by reacting amines with phosgene in the gas phase in a reaction zone, with the reaction mixture being passed through a zone into which a liquid is sprayed to stop the reaction, wherein the reaction mixture is passed through a zone having a reduced flow cross section between the reaction zone and the zone into which the liquid is sprayed.

    6.
    发明专利
    未知

    公开(公告)号：DE102005037328A1

    公开(公告)日：2007-02-08

    申请号：DE102005037328

    申请日：2005-08-04

    Applicant: BASF AG

    Inventor： WOELFERT ANDREAS ,  KNOESCHE CARSTEN ,  HEILIG MANFRED ,  STROEFER ECKHARD

    IPC: C07C263/10 ,  C07C263/20 ,  C07C265/00

    Abstract: Diisocyanates production includes supplying gas flow containing diamine and phosgene to reaction zone, separating surplus phosgene and hydrogen chloride gas from gaseous reaction mixture, feeding back the separated phosgene into the reaction, and separating hydrogen chloride (15 wt.%) from the feedback phosgene stream. The mass fraction of hydrogen chloride in the phosgene-containing stream before mixing with the amine-containing stream is less than 15 wt.%. A chlorobenzene inert medium with gas volume of more than 0.0001-30 is added to the diamine- and/or phosgene-containing gas stream. Diisocyanates production includes supplying gas flow containing diamine and phosgene to reaction zone, separating surplus phosgene and hydrogen chloride gas from gaseous reaction mixture, feeding back the separated phosgene into the reaction, and separating hydrogen chloride (15 wt.%) from the feedback phosgene stream. The mass fraction of hydrogen chloride in the phosgene-containing stream before mixing with the amine-containing stream is less than 15 wt.%. A chlorobenzene inert medium with gas volume of more than 0.0001-30 is added to the diamine- and/or phosgene-containing gas stream. The reaction of the diamine with phosgene takes place in a reaction chamber (IV) at 0.1-20 bar and at 200-600[deg]C. The flow in the reaction chamber exhibits Bodenstein number of more than 10. The average contact time of the reaction mixture is 0.001-5 seconds, and the molecular ratio of phosgene to amino groups is 1.1: 1-20: 1. The isocyanate is 1,6-diisocyanatohexane, 1-isocyanato-3,3,5 tri methyl-5-(isocyanatomethyl) cyclohexane, 4,4 '-di(isocyanatocyclohexyl)methane and toluylene diisocyanate isomeric mixtures.

    8.
    发明专利
    未知

    公开(公告)号：BRPI0512358B1

    公开(公告)日：2015-02-10

    申请号：BRPI0512358

    申请日：2005-06-22

    Applicant: BASF AG

    Inventor： KNOESCHE CARSTEN ,  WOELFERT ANDREAS ,  DAISS ANDREAS

    IPC: C07C263/10 ,  C07C265/14

    Abstract: The invention relates to a process for preparing isocyanates by reacting amines with phosgene in the gas phase in a reaction zone, with the reaction mixture being passed through a zone into which a liquid is sprayed to stop the reaction, wherein the reaction mixture is passed through a zone having a reduced flow cross section between the reaction zone and the zone into which the liquid is sprayed.

    9.
    发明专利
    未知

    公开(公告)号：AT372317T

    公开(公告)日：2007-09-15

    申请号：AT05700737

    申请日：2005-01-07

    Applicant: BASF AG

    Inventor： KNOESCHE CARSTEN ,  SOHN MARTIN ,  PENZEL ULRICH ,  PALLASCH HANS-JUERGEN ,  GEORGI GUNTER ,  MACKENROTH WOLFGANG ,  SCHWARZ HANS VOLKMAR ,  MAIXNER STEFAN ,  MOLZ GERALD ,  STROEFER ECKHARD

    IPC: C07C209/84 ,  C07C211/50

    Abstract: The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region ( 2 ), a lower combined column region ( 3 ), a feed section ( 4 ) having a rectifying section ( 5 ) and stripping section ( 6 ), and also a withdrawal section ( 7 ) having a rectifying section ( 9 ) and stripping section ( 8 ), which comprises the following steps: a. feeding the reactant stream ( 13 ) into the feed section ( 4 ) of the dividing wall column ( 1 ); b. drawing off a low boiler fraction via the top of the column ( 11 ); c. drawing off TDA via a side draw ( 14 ) in the withdrawal section ( 7 ) of the dividing wall column ( 1 ); d. drawing off a low boiler fraction via the bottom of the column ( 12 ).

Patent Agency Ranking