公开(公告)号：JP2001039952A

公开(公告)日：2001-02-13

申请号：JP2000190386

申请日：2000-06-26

Applicant: BASF AG

Inventor： KRAMER ANDREAS ,  MELDER JOHANN-PETER ,  RUETTER HEINZ ,  RIEWE GUENTER ,  SIEGEL WOLFGANG ,  WEYER HANS-JUERGEN DR

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

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing an N-alkyl-N'-methylalkyleneurea, especially N,N'-dimethylpropyleneurea and N,N'-dimethylenthyleneurea without substantially containing formic acid. SOLUTION: This method for producing an N-alkyl-N'-methylalkyleneurea represented by the formula [R1 denotes H or CH3; R2 denotes CnH2n+1 (n is 1-4); and (x) denotes 0 or 1] without substantially containing formic acid comprises reacting the corresponding alkyleneurea with a monomeric formaldehyde or a polymerized formaldehyde in the presence of the formic acid. A mixture of the N-alkyl-N'-methylalkyleneurea with the formic acid obtained by the reaction is fed to an upper region of a distillation column and distilled without adding any substance to remove the N-alkyhl-N'-methylalkyleneurea without substantially containing the formic acid in a lower region of the distillation column. The pressure in the upper region of the distillation column at this time is set at a higher level than that in the lower region by 10-100 millibars and the temperature of the lower region of the distillation column is set at a higher level than that in the upper region by 40-210 deg.C.

公开(公告)号：DE3132025A1

公开(公告)日：1983-03-03

申请号：DE3132025

申请日：1981-08-13

Applicant: BASF AG

Inventor： DOCKNER TONI DIPL CHEM DR ,  FRANK ANTON ,  RIEWE GUENTER ,  WETZLER MATTHIAS DIPL CHEM

IPC: C07D233/92

公开(公告)号：AT222241T

公开(公告)日：2002-08-15

申请号：AT00111932

申请日：2000-06-15

Applicant: BASF AG

Inventor： KRAMER ANDREAS DR ,  MELDER JOHANN-PETER DR ,  RUETTER HEINZ DR ,  RIEWE GUENTER ,  SIEGEL WOLFGANG DR ,  WEYER HANS-JUERGEN 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.

公开(公告)号：DE3268390D1

公开(公告)日：1986-02-20

申请号：DE3268390

申请日：1982-07-16

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  FRANK ANTON ,  RIEWE GUENTER ,  WETZLER MATTHIAS

IPC: C07D233/92

公开(公告)号：DE2718192A1

公开(公告)日：1978-11-02

申请号：DE2718192

申请日：1977-04-23

Applicant: BASF AG

Inventor： DOCKNER TONI DIPL CHEM DR ,  RIEWE GUENTER

IPC: C07D233/92

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.

公开(公告)号：DE19929602A1

公开(公告)日：2001-01-04

申请号：DE19929602

申请日：1999-06-28

Applicant: BASF AG

Inventor： KRAMER ANDREAS ,  MELDER JOHANN-PETER ,  RUETTER HEINZ ,  RIEWE GUENTER ,  SIEGEL WOLFGANG ,  WEYER HANS-JUERGEN

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.