公开(公告)号：JPH04270257A

公开(公告)日：1992-09-25

申请号：JP19960891

申请日：1991-08-08

申请人： CHEMIE LINZ GMBH

发明人： KURUTO ARUFUREETO HATSUKURU ,  HAINTSU FUARUKU

IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C273/18 ,  C07C275/06 ,  C07D295/195 ,  C07D295/215

公开(公告)号：JPH06171927A

公开(公告)日：1994-06-21

申请号：JP20082393

申请日：1993-08-12

申请人： CHEMIE LINZ GMBH

发明人： KURUTO ARUFUREETO HATSUKURU ,  MARUTEIN MIYUURUNAA ,  EERITSUHI SHIYURUTSU ,  GERUHARUTO SHIYUTERUN ,  HAINTSU FUARUKU

IPC分类号： C01C3/14 ,  C01C3/00 ,  C07C209/62 ,  C07C211/27

公开(公告)号：JPH06157449A

公开(公告)日：1994-06-03

申请号：JP20082493

申请日：1993-08-12

申请人： CHEMIE LINZ GMBH

发明人： KURUTO ARUFUREETO HATSUKURU ,  HAINTSU FUARUKU

IPC分类号： C07C209/62 ,  C07C211/03 ,  C07C211/27 ,  C07C263/06 ,  C07C265/02 ,  C07C265/04 ,  C07C265/12 ,  C07C273/00 ,  C07C275/00

公开(公告)号：JPH06293747A

公开(公告)日：1994-10-21

申请号：JP486094

申请日：1994-01-20

申请人： CHEMIE LINZ GMBH

发明人： KURUTO ARUFUREETO HATSUKURU ,  MARUKUSU RETSUSURAA ,  MARUTEIN MIYUURUNAA ,  GERUHARUTO SHIYUTERUN

IPC分类号： B01J31/02 ,  C07D263/04 ,  C07D265/06 ,  C07D277/04 ,  C07D295/08 ,  C07D295/108 ,  C07D295/215 ,  C07D401/06 ,  C07D403/06 ,  C07D413/06 ,  C07D417/06

摘要： Use of ureas in which at least one of the two nitrogen atoms of the urea is part of a non-aromatic ring which can be interrupted by an oxygen or sulphur atom, as a chemical solvent, and a process for the preparation of tri- or tetraalkylated ureas or diureas, at least one of the nitrogen atoms of the urea being part of a non-aromatic ring which can be interrupted by an oxygen or sulphur atom, by dialkylation of the -NH2 group of a urea with an alkylene- or alkylenearylenealkylene dihalide, disulphonate or dihydrogensulphate in the presence of a solid base and of a phase-transfer catalyst.

公开(公告)号：JPH05194360A

公开(公告)日：1993-08-03

申请号：JP21679392

申请日：1992-08-14

申请人： CHEMIE LINZ GMBH

发明人： KURUTO ARUFUREETO HATSUKURU ,  HAINTSU FUARUKU

IPC分类号： C07C273/18 ,  A01N47/00 ,  C07C275/28 ,  C07C275/30 ,  C07C275/34 ,  C07C275/40 ,  C07D295/20 ,  C07D295/215

摘要： Process for the preparation of very pure ureas of the formula phenyl-(NH-CO-NR1R2)n in which phenyl represents an unsubstituted or substituted phenyl or phenylene group and R1 and R2 are either identical and each represent an alkyl group, or are different, in which case R1 represents a hydrogen atom and R2 represents an alkyl or phenyl group, or R1 and R2, together with the nitrogen atom, represent an aliphatic heterocyclic ring and n is the number 1 or 2, by reacting a phenylurea of the formula phenyl-(NH-CO-NH2)n with an amine of the formula NR1R2H at temperatures from 100 to 200 degrees C. in a diluent which is inert under the reaction conditions, the reaction being interrupted before by-products are formed, and the urea which is formed being removed from the starting compounds, and the unreacted starting compounds being returned to the process if appropriate.