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2. 发明专利

DE50200797D1 未知
公开(公告)号：DE50200797D1
公开(公告)日：2004-09-16
申请号：DE50200797
申请日：2002-10-29
申请人： BASF AG
发明人： WOELFERT DR , RUETTER DR , RITTINGER DR , WEHINGER MARK , ALEMANY AURELIE , SCHMIDT WILLI
IPC分类号： C07D211/12 , C07C209/16 , C07C209/84 , C07C209/86 , C07C211/08 , C07D207/04 , C07D207/06 , C07D211/04 , C07D211/14 , C07D265/30 , C07D295/02 , C07D295/027 , C07D295/03

4. 发明专利

DE50000375D1 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
申请人： BASF AG
发明人： KRAMER DR , MELDER DR , RUETTER DR , RIEWE GUENTER , SIEGEL DR , WEYER DR
IPC分类号： C07D233/32 , C07D233/34 , C07D239/10
摘要： 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.

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