中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

84 records (took 0.024 seconds)

    35.
    发明专利
    未知

    公开(公告)号：AT435851T

    公开(公告)日：2009-07-15

    申请号：AT01927931

    申请日：2001-04-30

    Applicant: BASF SE

    Inventor： OHLBACH FRANK ,  ANSMANN ANDREAS ,  BASSLER PETER ,  FISCHER ROLF-HARTMUTH ,  LUYKEN HERMANN ,  MAIXNER STEFAN ,  MELDER JOHANN-PETER

    IPC: C07D201/08 ,  C07D223/10 ,  C07B61/00 ,  C07D207/263 ,  C07D211/76 ,  C07D225/02

    Abstract: The invention relates to a method for producing cyclic lactams of the formula (II), wherein n and m may each represent 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n + m is at least 3, preferably at least 4, R and R represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups, by reacting a compound of the formula (I), wherein R , R , m and n have the meaning indicated above, and R represents nitrile groups, carboxylic acid amide groups and carboxylic acid groups, with water vapor in the gaseous phase. The inventive method is further characterized in that a) the compound (I) is reacted with water vapor in the gaseous phase, adding an organic diluent (III) before or after the reaction, which diluent has a miscibility gap under certain quantitative, pressure and temperature conditions, said reaction resulting in a mixture (IV) that contains a lactam (II), b) adjusting the mixture (IV) before or after the removal of ammonia to quantitative, pressure and temperature conditions under which the diluent (III) and water are present in a liquid form and have a miscibility gap, and obtaining a two-phase system consisting of a phase (V) that has a higher proportion of diluent (III) than water, and a phase (VI) that has a higher proportion of water than diluent (III), c) separating phase (V) from phase (VI) and, d) removing from phase (V) the diluent (III) and optionally by-products selected from the group of the low-boilers, high-boilers and unreacted compound (I), and obtaining a lactam (II).

    37.
    发明专利
    未知

    公开(公告)号：DE502005004359D1

    公开(公告)日：2008-07-17

    申请号：DE502005004359

    申请日：2005-10-12

    Applicant: BASF SE

    Inventor： DECKERT PETRA ,  BASSLER PETER ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  SCHEIDEL JENS ,  PFAB PETER ,  AECHTNER TOBIAS ,  SIEGEL WOLFGANG

    IPC: B01J38/56 ,  B01D11/04 ,  B01J31/18 ,  B01J31/24 ,  C07C253/10 ,  C07C253/32

    Abstract: A process for extractively removing homogeneously dissolved catalysts from a reaction effluent of a hydrocyanation of unsaturated mononitriles to dinitriles with a hydrocarbon H, including performing the steps of a) concentrating the reaction effluent before step b) by distillation at pressures of from 0.1 to 5000 mbar and temperatures of from 10 to 150° C., b) adding a hydrocarbon H to the concentrated reaction effluent to obtain a stream I, and c) feeding stream I, without prior separation of the liquid phases, into an extraction apparatus and extracting it at a temperature T with the hydrocarbon H to obtain a stream II comprising the hydrocarbon H enriched with the catalyst and a stream III having a low catalyst content.

    38.
    发明专利
    未知

    公开(公告)号：AT391554T

    公开(公告)日：2008-04-15

    申请号：AT01978378

    申请日：2001-09-20

    Applicant: BASF SE

    Inventor： OHLBACH FRANK ,  LUYKEN HERMANN ,  ANSMANN ANDREAS ,  FISCHER ROLF-HARTMUTH ,  MELDER JOHANN-PETER ,  BASSLER PETER

    IPC: B01J38/52 ,  B01J23/86 ,  B01J23/94 ,  C07B61/00 ,  C07C209/48 ,  C07C211/12

    Abstract: A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NH 2 groups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein a) the feed of the compound to be hydrogenated is stopped and b) the heterogeneous catalyst is treated with a compound of the formula R 1 R 2 N-CO-R 3 (I), in which R 1 is hydrogen or C 1 -C 4 alkyl and R 2 , R 3 independently of one another are each hydrogen or C 1 -C 4 alkyl or together are a C 3 -C 6 alkylene group, or mixtures of such compounds, at a pressure ranging from 0.1 to 30 MPa and a temperature ranging from 100 to 300° C., with the proviso that the compound of formula (I) is in liquid form during the treatment.

Patent Agency Ranking