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    1.
    发明专利
    未知

    公开(公告)号：DE50106282D1

    公开(公告)日：2005-06-30

    申请号：DE50106282

    申请日：2001-01-23

    Applicant: BASF AG

    Inventor： OHLBACH DR ,  MELDER DR ,  ROSS DR ,  RUDLOFF MARTIN ,  LIEBE DR

    IPC: C07B61/00 ,  C07D207/26 ,  C07D207/267

    Abstract: N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating 10 off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (gamma-BL), in a molar ratio of monomethylamine to gamma-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.

    6.
    发明专利
    未知

    公开(公告)号：DE50007278D1

    公开(公告)日：2004-09-09

    申请号：DE50007278

    申请日：2000-11-10

    Applicant: BASF AG

    Inventor： NOUWEN DR ,  HOEHN DR ,  NEUHAUSER DR ,  FUNKE DR ,  SCHUNK STEPHAN ANDREAS ,  MELDER DR ,  EGER DR ,  HESSE DR ,  WULFF-DOERING DR

    IPC: B01J23/755 ,  C07B61/00 ,  C07C209/26 ,  C07C211/27 ,  C07C211/35 ,  C07C211/38 ,  C07C211/42 ,  C07C213/02 ,  C07C217/58

    Abstract: Amines are prepared by reacting aldehydes or ketones at elevated temperature under elevated pressure with nitrogen compounds selected from the group of ammonia, primary and secondary amines, and with hydrogen in the presence of a catalyst, wherein the catalytically active mass of the catalyst contains, after its preparation and before the treatment with hydrogen,22 to 45% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2,1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO,5 to 50% by weight of oxygen-containing compounds of nickel, calculated as NiO, where the molar ratio of nickel to copper is greater than 1,5 to 50% by weight of oxygen-containing compounds of cobalt, calculated as CoO,0 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO3, and 0 to 10% by weight of oxygen-containing compounds of aluminum and/or manganese, calculated as Al2O3 or MnO2.

    7.
    发明专利
    未知

    公开(公告)号：DE50000375D1

    公开(公告)日：2002-09-19

    申请号：DE50000375

    申请日：2000-06-15

    Applicant: BASF AG

    Inventor： KRAMER DR ,  MELDER DR ,  RUETTER DR ,  RIEWE GUENTER ,  SIEGEL DR ,  WEYER DR

    IPC: C07D233/32 ,  C07D233/34 ,  C07D239/10

    Abstract: Formic acid-free N-alkyl-N'-methyl-alkylene ureas (I) are obtained from reaction mixtures obtained from the corresponding alkylene urea (II) and formaldehyde in presence of formic acid by supplying the mixture to the upper part of a distillation column, carrying out distillation under specific pressure and temperature conditions and recovering HCOOH-free (I) from the lower part of the column. Preparation of formic acid-free N-alkyl-N'-methyl-alkylene ureas of formula (I), by reacting the corresponding alkylene urea of formula (II) with monomeric or polymerized formaldehyde (HCHO) in presence of formic acid (HCOOH), involves supplying the reaction mixture containing (I) and HCOOH to the upper part of a distillation column, carrying out distillation without further additives and recovering HCOOH-free (I) from the lower part of the column. The pressure is in the upper part of the column is higher than that in the lower part by 10-100 (preferably 20-40) mbars and the temperature in the lower part of the column is higher than that in the upper part by 40-210 (preferably 80-150) degrees C. R1 = H or Me; R2 = H or 1-4C alkyl; x = 0 or 1.

    8.
    发明专利
    未知

    公开(公告)号：DE59802407D1

    公开(公告)日：2002-01-31

    申请号：DE59802407

    申请日：1998-07-13

    Applicant: BASF AG

    Inventor： AUER HEINZ ,  KRUEGER SIEGFRIED ,  SCHOLL DR ,  WEBER THEODOR ,  MELDER DR

    IPC: B01D3/00 ,  B01D3/14 ,  B01D3/32 ,  C07C67/54 ,  C07C69/28 ,  C07C69/675

    Abstract: Recovery of neopentyl hydroxypivalate (I) from a mixture containing (I), products (II) of lower boiling point, products (III) of higher boiling point and inorganic salts (IV) is carried out in 2 separation stages. In stage (1), the mixture is fed to a wiped film evaporator; (III) and (IV) are discharged from the sump; and a vapor stream of (I), (II) and (III) is discharged via the top to a heat transfer unit, where it is condensed. In stage (2), the condensate is fed into a rectifying column with a second evaporator and heat transfer; a vapor stream of (II) is discharged at the top, condensed and optionally partly recycled as reflux and partly discharged; a vapor stream of (I) is discharged at the side and condensed; and a stream of (I) and (III) is discharged from the sump and (partly) passed to the second evaporator, the vapor from this evaporator being (partly) recycled to the lower zone of the column. Also claimed is the apparatus used.

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