中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

33 records (took 0.022 seconds)

    Method for producing methylenedianiline and methylene-bis(phenyl isocyanate)
    1.
    发明专利
    Method for producing methylenedianiline and methylene-bis(phenyl isocyanate) 有权
    生产甲基亚胺和亚甲基双（苯甲酸异戊酯）的方法

    公开(公告)号：JP2010270147A

    公开(公告)日：2010-12-02

    申请号：JP2010175044

    申请日：2010-08-04

    Applicant: Basf Se ,  ビーエーエスエフ ソシエタス・ヨーロピアBasf Se

    Inventor： STROEFER ECKHARD ,  JACOBS JAN ,  SEYFERT WILFRIED ,  SCHWARZ HANS VOLKMAR ,  SCHWEERS OLAF ,  SCHARR VOLKER ,  PENZEL ULRICH

    IPC: C07C209/78 ,  C07B61/00 ,  C07C211/45 ,  C07C211/50 ,  C07C263/10 ,  C07C265/14

    CPC classification number: C07C209/78 ,  C07C263/10 ,  C07C211/50 ,  C07C265/12 ,  C07C265/14

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing methylenedianiline (MDA) by reacting aniline with formaldehyde in the presence of acid catalysts while minimizing the N-methyl-MDA content as an undesirable by-product. SOLUTION: The semicontinuous method for producing MDA includes: introducing aniline with or without the acid catalyst; feeding formaldehyde with or without the acid catalyst through a mixing means into a circuit in which aniline with or without the acid catalyst and with or without previously added formaldehyde is circulated; and heating a reaction mixture to a temperature above 75°C after feeding in at least 50% of the total amount of formaldehyde to be fed. There is also provided a method for producing polyisocyanates by phosgenation of amines obtainable in such a manner. MDA is used for production of methylene-bis(phenyl isocyanate) (MDI) having a low chlorine content and/or a light color. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 待解决的问题：提供一种在酸催化剂存在下使苯胺与甲醛反应生成亚甲基二苯胺（MDA）的方法，同时使N-甲基-MAA含量最小化作为不合需要的副产物。 解决方案：用于生产MDA的半连续方法包括：在具有或不具有酸催化剂的情况下引入苯胺; 通过混合装置将具有或不含酸催化剂的甲醛进料到其中具有或不具有酸催化剂和有或没有预先加入的甲醛的苯胺循环的回路中; 并在加入至少50％的待进料甲醛总量之后，将反应混合物加热至高于75℃的温度。 还提供了通过以这种方式获得的胺的光气化制备多异氰酸酯的方法。 MDA用于生产具有低氯含量和/或浅色的亚甲基双（苯基异氰酸酯）（MDI）。 版权所有（C）2011，JPO＆INPIT

    Procedimiento para la preparación de isocianatos
    3.
    发明专利
    Procedimiento para la preparación de isocianatos 未知

    公开(公告)号：ES2753382T3

    公开(公告)日：2020-04-08

    申请号：ES05752554

    申请日：2005-05-21

    Applicant: BASF SE

    Inventor： WÖLFERT ANDREAS ,  PALLASCH HANS-JÜRGEN ,  STROEFER ECKHARD ,  PENZEL ULRICH ,  DEBERDT FILIP

    IPC: C07C263/10 ,  C07C265/12 ,  C07C265/14

    Abstract: Procedimiento para la preparación de isocianatos mediante reacción de aminas con fosgeno, en el que el flujo de fosgeno, que se alimenta al mezclado de amina y fosgeno, (i) está esencialmente libre de isocianatos y (ii) presenta un contenido en masa de cloruro de hidrógeno inferior al 0,4 % en masa, en el que la cantidad necesaria de HCl en el flujo de producto de partida que contiene fosgeno (11) se facilita mediante adición de HCl en el fosgeno fresco (1) o se ajusta en el flujo de fosgeno reconducido (10) mediante procesamiento en el procesamiento de fosgeno (IX) con consideración de la cantidad alimentada de fosgeno fresco (1).

    9.
    发明专利
    未知

    公开(公告)号：AT488494T

    公开(公告)日：2010-12-15

    申请号：AT03789264

    申请日：2003-12-13

    Applicant: BASF SE

    Inventor： SOHN MARTIN ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PENZEL ULRICH ,  PALLASCH HANS-JUERGEN ,  VAN DEN ABEEL PETER ,  DEBERDT FILIP ,  JACOBS JAN D ,  MACKENROTH WOLFGANG

    IPC: C07C263/10 ,  B01D53/70 ,  C01B7/07 ,  C01B32/80

    Abstract: The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.

Patent Agency Ranking