公开(公告)号：BR7204496D0

公开(公告)日：1973-07-10

申请号：BR449672

申请日：1972-07-07

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  LANDLER J

IPC: C09B5/24 ,  C09B57/14 ,  C09B5/00

Abstract: 1393957 Preparing pigments HOECHST AG 7 July 1972 [10 July 1971] 31944/72 Heading C4P Pigments containing the benzothioxanthene nucleus are prepared by reacting a compound containing the 1-(2 1 -aminophenylmercapto)-naphthalene nucleus or the 1-phenylmercapto-8- aminonaphthalene nucleus in a tertiary amine with a compound yielding nitrosyl groups and heating the diazonium compound formed. Compounds yielding nitrosyl groups are nitrososulphuric acid and nitrosyl chloride and the tertiary amines used include pyridine, picoline, quinoline, isoquinoline or mixtures thereof. The starting compounds include 3-(2 1 -amino-phenylmercapto) - benzanthrone and 4 - (2 - aminophenylmercapto)-naphthalic acid anhydride.

公开(公告)号：BR7017507D0

公开(公告)日：1973-01-18

申请号：BR21750770

申请日：1970-03-17

Applicant: HOECHST AG

Inventor： SPIETSCHKA E ,  TROSTER H ,  LANDLER J

IPC: C08K5/45 ,  C09B57/14 ,  C08G53/04

公开(公告)号：DK139435C

公开(公告)日：1979-08-06

申请号：DK32373

申请日：1973-01-19

Applicant: HOECHST AG

Inventor： LANDLER J ,  HUNGER K ,  WOERFEL E

IPC: C09B29/20 ,  C09B29/00 ,  C09B41/00

公开(公告)号：BR7600565A

公开(公告)日：1977-05-10

申请号：BR7600565

申请日：1976-01-29

Applicant: HOECHST AG

Inventor： OPITZ K ,  LANDLER J ,  WORFEL E

IPC: C09B62/006 ,  C09B62/016 ,  C09B67/26 ,  D06P1/38 ,  C09B41/00 ,  C09B67/00

公开(公告)号：BR7600563A

公开(公告)日：1976-08-31

申请号：BR7600563

申请日：1976-01-29

Applicant: HOECHST AG

Inventor： LANDLER J ,  WORFEL E

IPC: C09B29/00 ,  C09B41/00 ,  C09B67/24

Abstract: A new and very advantageous Process had been found for the preparation of azo dyestuffs by diazotation and coupling in which the synthesis is carried out without the hitherto usual addition of an acid, with the proviso that at least one of the diazo and coupling components contains at least one acid group. Besides the saving of reaction material and subsequently of alkali for neutralization of the reaction medium and isolation of the dyestuff, highly concentrated solutions of the dyestuff and salt-free or practically salt-free dyestuffs can be obtained, and waste-water is no longer charged with big amounts of salts.

公开(公告)号：BR7308940D0

公开(公告)日：1974-08-22

申请号：BR894073

申请日：1973-11-14

Applicant: HOECHST AG

Inventor： LANDLER J ,  HUNGER K ,  WORFEL E

IPC: C09B33/147 ,  C09B41/00 ,  C09B33/14

公开(公告)号：BR7300436D0

公开(公告)日：1973-09-13

申请号：BR43673

申请日：1973-01-19

Applicant: HOECHST AG

Inventor： LANDLER J ,  HUNGER K ,  WORFEL E

IPC: C09B29/20 ,  C09B29/00 ,  C09B41/00 ,  C09B39/00

公开(公告)号：DK139435B

公开(公告)日：1979-02-19

申请号：DK32373

申请日：1973-01-19

Applicant: HOECHST AG

Inventor： LANDLER J ,  HUNGER K ,  WOERFEL E

IPC: C09B29/20 ,  C09B29/00 ,  C09B41/00

公开(公告)号：BR7708260A

公开(公告)日：1978-09-05

申请号：BR7708260

申请日：1977-12-13

Applicant: HOECHST AG

Inventor： WORFEL E ,  LANDLER J

IPC: C09B62/515 ,  C09B67/26 ,  C09B67/36 ,  D06P1/12 ,  D06P1/38 ,  C09B62/00

公开(公告)号：IN144344B

公开(公告)日：1978-04-29

申请号：IN152CA1976

申请日：1976-01-28

Applicant: HOECHST AG

Inventor： WORFEL E ,  LANDLER J

IPC: C09B29/00 ,  C09B41/00 ,  C09B67/24 ,  C09B31/04 ,  D06P1/16

Abstract: A new and very advantageous Process had been found for the preparation of azo dyestuffs by diazotation and coupling in which the synthesis is carried out without the hitherto usual addition of an acid, with the proviso that at least one of the diazo and coupling components contains at least one acid group. Besides the saving of reaction material and subsequently of alkali for neutralization of the reaction medium and isolation of the dyestuff, highly concentrated solutions of the dyestuff and salt-free or practically salt-free dyestuffs can be obtained, and waste-water is no longer charged with big amounts of salts.