中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

361 records (took 0.051 seconds)

    93.
    发明专利
    未知

    公开(公告)号：TR200002251T2

    公开(公告)日：2001-01-22

    申请号：TR200002251

    申请日：1999-02-02

    Applicant: BASF AG

    Inventor： MOHRSCHLADT RALF ,  HILDEBRANDT VOLKER ,  FUCHS EBERHARD

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/16 ,  C08G69/28 ,  C08K3/00 ,  C08K3/011

    Abstract: A continuous process for preparing a polyamide by reacting at least one aminonitrile with water comprises:(1) reacting at least one aminonitrile with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 35x106 Pa in a flow tube containing a Brönsted acid catalyst selected from a beta-zeolite catalyst, a sheet-silicate catalyst or a titanium dioxide catalyst comprising from 70 to 100% by weight of anatase and from 0 to 30% by weight of rutile and in which up to 40% by weight of the titanium dioxide may be replaced by tungsten oxide to obtain a reaction mixture,(2) further reacting the reaction mixture at a temperature from 150 to 400° C. and a pressure which is lower than the pressure in step 1, in the presence of a Brönsted acid catalyst as in (1), the temperature and pressure being selected so as to obtain a first gas phase and a first liquid or a first solid phase or a mixture of first solid and first liquid phase, and the first gas phase is separated from the first liquid or the first solid phase or from the mixture of first liquid and first solid phase, and(3) admixing the first liquid or the first solid phase or the mixture of first liquid and first solid phase with a gaseous or liquid phase comprising water at a temperature from 150 to 370° C. and a pressure from 0.1 to 30x106 Pa to obtain a product mixture.

    Process for producing polycaprolactam
    97.
    发明专利
    Process for producing polycaprolactam 未知

    公开(公告)号：SG75895A1

    公开(公告)日：2000-10-24

    申请号：SG1998004735

    申请日：1996-05-07

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  MELDER JOHANN-PETER ,  SCHNURR WERNER ,  FISCHER ROLF

    IPC: C07D201/08 ,  C07D223/12 ,  C08G69/16

    Abstract: A process for preparing caprolactam by reacting 6-aminocapronitrile with water in the presence of catalysts comprises using a starting mixture of 6-aminocapronitrile and the tetrahydroazepine derivative of the formulaand conducting the reaction in liquid phase in the presence of a heterogeneous catalyst. Also describes a process for preparing said tetrahydroazepine derivative I and its use for preparing caprolactam and polycaprolactam.

    100.
    发明专利
    未知

    公开(公告)号：ID24234A

    公开(公告)日：2000-07-13

    申请号：ID991315

    申请日：1998-04-30

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  FISCHER ROLF

    IPC: C07D201/08

    Abstract: The disclosure is a process for preparing cyclic lactams of the formula I:whereR1 is hydrogen, alkyl, cycloalkyl or aryl, andA is C3-C12-alkylene unsubstituted or substituted by 1, 2, 3, 4, 5 or 6 substituents selected independently of one another from the group consisting of alkyl, cycloalkyl and aryl,by conversion of an omega-aminocarbonitrile of the formula II:where R1 and A are each as defined above, in the presence of at least one catalyst, which comprises converting said nitrile II into an oligomer mixture, and treating with superheated steam.

Patent Agency Ranking