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    VERFAHREN ZUR HERSTELLUNG VON PHOSGEN
    12.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON PHOSGEN 审中-公开
    用于生产光气

    公开(公告)号：EP2406181A1

    公开(公告)日：2012-01-18

    申请号：EP10707905.5

    申请日：2010-03-10

    Applicant: BASF SE

    Inventor： OLBERT, Gerhard ,  THIELE, Kai ,  KIM, Byoung Yeon ,  SCHELLING, Heiner

    IPC: C01B31/28

    Abstract: A method is proposed for producing phosgene by reacting a feed stream (1) obtained by combining and mixing a chlorine feed stream (2) and a carbon monoxide feed stream (3), wherein the carbon monoxide is fed in a stoichiometric excess over chlorine, on contact tubes that are filled with activated-carbon beds, of a reactor R having a bundle of contact tubes, obtaining a product gas mixture (4) that is separated into a liquid, phosgene-containing product stream (5), and also an exhaust gas stream (6) containing carbon monoxide which is ejected via a pressure-retaining valve, and wherein the feed stream (1) is reacted in the reactor R and also the product gas mixture (4) is separated at a pressure in the range from 2.0 to 6.0 bar superatmospheric pressure, which is characterized in that the carbon monoxide excess in the feed steam (1) to the reactor R is controlled by continuously measuring the flow rate and the concentration of carbon monoxide in the exhaust gas stream (6), herefrom, in combination with the continuously determined measured values of the flow rate of the carbon monoxide feed stream (3), the flow rate and the chlorine concentration of the chlorine feed stream (2), the actual value of the carbon monoxide excess in the feed stream (1) to the reactor R is calculated and matched to the theoretical value of the carbon monoxide excess in the feed stream (1) to the reactor R by adapting the flow rate of the carbon monoxide feed stream (3).

    VERFAHREN ZUR HERSTELLUNG VON METHYLENDIPHENYLDIISOCYANAT
    18.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON METHYLENDIPHENYLDIISOCYANAT 审中-公开
    VERFAHREN ZUR HERSTELLUNG冯甲基联苯胺

    公开(公告)号：EP2640694A1

    公开(公告)日：2013-09-25

    申请号：EP11782610.7

    申请日：2011-11-14

    Applicant: BASF SE

    Inventor： BOCK, Michael ,  THIELE, Kai ,  SCHELLING, Heiner

    IPC: C07C263/10 ,  C07C265/14

    CPC classification number: C07C263/10 ,  C07C265/14

    Abstract: The invention relates to a process for preparing methylene diphenyl diisocyanate, comprising (a) the phosgenation of di- and/or polycyclic methylene diphenyl diamine, (b) the separation of the crude methylene diphenyl diisocyanate obtained into di- and polycyclic isomers, (c) the purification and/or separation of the mixture of bicyclic isomers of methylene diphenyl diisocyanate obtained, and (d) the storage of the mixtures obtained in step (c) or in step (b), wherein a portion of the stored mixtures is used again by means of recycling in at least one of steps (b) and (c).

    Abstract translation: 本发明涉及一种制备亚甲基二苯基二异氰酸酯的方法，包括（a）二环和/或多环亚甲基二苯基二胺的光气化，（b）将得到的粗亚甲基二苯基二异氰酸酯分离成二环和多环异构体，（c 获得的亚甲基二苯基二异氰酸酯的双环异构体的混合物的纯化和/或分离，和（d）在步骤（c）或步骤（b）中获得的混合物的储存，其中使用一部分储存的混合物 再次通过在步骤（b）和（c）中的至少一个循环。

    VERFAHREN ZUR HERSTELLUNG VON AROMATISCHEN ISOCYANATEN
    20.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON AROMATISCHEN ISOCYANATEN 有权
    用于生产芳族异氰酸

    公开(公告)号：EP2323973A1

    公开(公告)日：2011-05-25

    申请号：EP09781542.7

    申请日：2009-08-06

    Applicant: BASF SE

    Inventor： PENZEL, Ulrich ,  MATTKE, Torsten ,  WÖLFERT, Andreas ,  JACOBS, Johannes ,  CHENG, Tsung-Chieh ,  HEINEN, Kerstin ,  STROEFER, Eckhard ,  MAIXNER, Stefan ,  MACKENROTH, Wolfgang ,  TRAGUT, Christian ,  THIELE, Kai ,  WON, Myung Un

    IPC: C07C263/10

    CPC classification number: C07C263/10 ,  C07C265/14

    Abstract: The invention relates to a method for producing isocyanates through reaction of the corresponding amines with phosgene in the liquid phase, optionally in the presence of at least one inert medium, in which first the amine and the phosgene are mixed in a mixing chamber (1) to form a reaction mixture and the reaction mixture is fed to a reactor, wherein the amine is added through an opening (3) that is disposed coaxially to the mixing chamber (1) and wherein the phosgene is added through feed openings (5) in at least two planes (7, 9) disposed perpendicular to the axis (11) of the mixing chamber (1), or the phosgene is added through the opening (3) that is coaxial to the mixing chamber and the amine is added through the feed openings (5) in at least two planes (7, 9) disposed perpendicular to the axis (11) of the mixing chamber (1). At least one plane (9) is disposed upstream in the main flow direction of the reaction mixture and at least one plane (7) is disposed downstream relative to the opening (3) disposed coaxially to the mixing chamber (1). The average residence time of the reaction mixture in the mixing chamber (1) is no more than 20 ms.

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