公开(公告)号：DE19510668A1

公开(公告)日：1996-09-26

申请号：DE19510668

申请日：1995-03-23

Applicant: HOECHST AG

Inventor： URBAN MANFRED DIPL ING ,  WILKER GERHARD

IPC: C09B3/66 ,  C08K5/08 ,  C09B67/04 ,  C09B67/10 ,  C09D5/38 ,  C09D11/02 ,  C09D17/00

Abstract: Prepn. of 4,10-dibromo-anthraquinone pigment (I) comprises (a) wet milling coarsely crystalline crude (I) to the required fineness in aq. medium in a stirred ball mill with a power of over 2.5 kW/l and stirrer peripheral velocity of over 12 m/s, using milling balls with a dia. of less than 1.0 mm; and (b-1) isolating (I) from the suspension or (b-2) finishing the pre-pigment from wet milling by high temp. treatment in an aq. or aq.-organic medium or liquid aromatic cpd. and then isolating (I).

公开(公告)号：DE4433041A1

公开(公告)日：1996-03-21

申请号：DE4433041

申请日：1994-09-16

Applicant: HOECHST AG

Inventor： URBAN MANFRED DIPL ING ,  WILKER GERHARD

IPC: C09B3/66 ,  C08K5/08 ,  C09B67/04 ,  C09B67/10 ,  C09D11/02 ,  C09D17/00

Abstract: Prepn. of 4,10-dibromo-anthraquinone pigment (I) comprises (a) wet milling coarsely crystalline crude (I) to the required fineness in aq. medium in a stirred ball mill with a power of over 2.5 kW/l and stirrer peripheral velocity of over 12 m/s, using milling balls with a dia. of less than 1.0 mm; and (b-1) isolating (I) from the suspension or (b-2) finishing the pre-pigment from wet milling by high temp. treatment in an aq. or aq.-organic medium or liquid aromatic cpd. and then isolating (I).