公开(公告)号：DE2348557A1

公开(公告)日：1975-04-10

申请号：DE2348557

申请日：1973-09-27

Applicant: BASF AG

Inventor： SCHUHMACHER ALFRED DIPL CHEM D ,  SCHWANTJE GERD DIPL CHEM DR

IPC: C07C101/80

Abstract: The specification is an addition to 2247347 in which 1-amino-anthraquinone-2-carboxylic acid (I) is reacted with CH2O in H2SO4 and the reaction mixt. nitrated to give 1,2-dihydro-6-nitro-7,8-diphthaloyl-3,1,4H-benzoxaz-4-one (II) which is isolated by addn. of a precipitating agent before being hydrolysed by treatment with aq. alkali to give, after acidification pure 1-amino-4-nitro-anthraquinone-2-carboxylic acid (III) as final prod. This process is now modified by using a salt of hydrazine or hydroxylamine as agent for pptn. of (II).

公开(公告)号：DE2428337A1

公开(公告)日：1975-12-18

申请号：DE2428337

申请日：1974-06-12

Applicant: BASF AG

Inventor： SCHUHMACHER ALFRED DIPL CHEM D

IPC: C07C97/26

Abstract: 1-amino-2-chloro- and 1-amino-2-bromo-4-hydroxy anthraquinones are prepd. by hydroxylating 1-amino-2:4-dichloro- or 1-amino-2:4-dibromo anthraquinone in H2SO4 in the presence of H3BO4 at 120-170 degrees C, the 2:4-dichloro-or 2:4-dibromo cpd. in the form of a filter cake moist with MeOH, EtOH, or PrOH and contg. at least 50% of the di-halo cpd., is introduced into 100-104.5% H2SO4 contg. 3.5-7% H3BO4, and heated to the reaction temp. i.e. 120-150 degrees C. Used as inters in the prepn. of disperse dyes. The alcohol-wet filter cake is used directly, thus obviating the washing and drying steps of known processes. A pure product is obtained.

公开(公告)号：DE2631833A1

公开(公告)日：1978-01-19

申请号：DE2631833

申请日：1976-07-15

Applicant: BASF AG

Inventor： SCHUHMACHER ALFRED DIPL CHEM D ,  KLING KARL-ERICH DIPL CHEM DR

IPC: C07C45/00 ,  C07C49/697 ,  C07C67/00 ,  C09B3/08 ,  C07C49/54

公开(公告)号：DE2440756A1

公开(公告)日：1976-04-15

申请号：DE2440756

申请日：1974-08-26

Applicant: BASF AG

Inventor： SCHUHMACHER ALFRED DIPL CHEM D ,  BRANDT HEINZ ING GRAD ,  WEIGOLD SIEGFRIED

IPC: C09B5/62 ,  C09B67/28 ,  D06P1/22 ,  C09B67/00 ,  C09B3/14