中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

17 records (took 0.021 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE2133349A1

    公开(公告)日：1973-01-25

    申请号：DE2133349

    申请日：1971-07-05

    Applicant: BASF AG

    Inventor： HOHENSCHUTZ HEINZ DR ,  FRANZ DIETER DR ,  BUELOW HORST DR ,  DINKHAUSER GUENTER DIPL-ING

    IPC: B01D1/00 ,  C07C51/14 ,  C07C51/487

    Abstract: A process for the production of propionic acid which comprises the reaction of ethylene with carbon monoxide and water in the presence of a nickel carbonyl complex at a temperature of from 250 DEG to 320 DEG C in the liquid phase and at a pressure of from 100 to 300 atmospheres in a vertical cylindrical reaction zone, a gaseous zone being maintained at the upper end of the reaction zone and a bottom zone being maintained at the lower end of the reaction zone which is not in communication with said reaction zone over the entire cross section.

    13.
    发明专利
    未知

    公开(公告)号：DE4301776A1

    公开(公告)日：1994-07-28

    申请号：DE4301776

    申请日：1993-01-23

    Applicant: BASF AG

    Inventor： PFAB PETER DR ,  WAHL PETER DR ,  FRANZ DIETER DR

    IPC: C07D207/32 ,  C07D207/323 ,  C07D295/02

    Abstract: Process for the purification of crude pyrroles obtained in the preparation of pyrroles of the general formula I in which R is hydrogen or a C1-C6-alkyl radical, characterised in that the mixture which contains the crude pyrrole is treated with an acid or an activated carboxylic acid derivative and the pyrrole is removed from the mixture by distillation at reduced pressure and a bottom temperature of up to 160@C.

    14.
    发明专利
    未知

    公开(公告)号：ES2045036T3

    公开(公告)日：1994-01-16

    申请号：ES88112507

    申请日：1988-08-02

    Applicant: BASF AG

    Inventor： MULLER HERBERT DR ,  FRANZ DIETER DR

    IPC: C07D295/02 ,  C07D295/023

    Abstract: N-Ethylpiperazine is isolated by distillation from a mixture consisting per 100 kg of a=from 30 to 90 kg of N-ethylpiperazine b=from 7 to 40 kg of N,N'-diethylpiperazine c=from 3 to 20 kg of piperazine d=from 0 to 30 kg of ethanol e=from 0 to 40 kg of water and f=from 0 to 5 kg of concomitants, by performing the distillation in the presence of x=y+e= from 3b to 12b of water, y being the quantity of water which has to be added, if necessary, to meet this condition, and successively separating from this mixture the fractions 1. water, ethanol, N,N'-diethylpiperazine and other highly volatile concomitants, 2. water, if present in excess, 3. piperzine and 4. pure N-ethylpiperazine as overhead products.

Patent Agency Ranking