Process for preparing 2, 9-dichloro-quinacridone
First Claim
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1. A PROCESS FOR THE PRODUCTION OF A PIGMENT DYE WHEREIN 2,9-DICHLORO-7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO(2,3-B)-ACRIDINE IN FINE PARTICLE SIZE IS BROUGHT INTO CONTACT SITH SULFURIC ACID OF THE CONCENTRATION 60% TO 75% AND AT TEMPERATURES OF 145*C. TO 175*C. UNTIL AN X-RAY DIFFRACTION PATTERN SHOWS AT A GONIOMETER ANGLE OF 27.8" ONE LINE OF GREAT INTENSITY, AT 5.4*, 15.3*, 23.3* AND 23.4* FOUR LINES OF MEDIUM INTENSITY AND AT 16.6*, 19.3*, 21.3*, 24.5*, 25.3*, 26.7*, 19.0* AND 30.7* EIGHT LINES OF LOW INTENSITY.
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1 Claim
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1. A PROCESS FOR THE PRODUCTION OF A PIGMENT DYE WHEREIN 2,9-DICHLORO-7,14-DIOXO-5,7,12,14-TETRAHYDROQUINOLINO(2,3-B)-ACRIDINE IN FINE PARTICLE SIZE IS BROUGHT INTO CONTACT SITH SULFURIC ACID OF THE CONCENTRATION 60% TO 75% AND AT TEMPERATURES OF 145*C. TO 175*C. UNTIL AN X-RAY DIFFRACTION PATTERN SHOWS AT A GONIOMETER ANGLE OF 27.8" ONE LINE OF GREAT INTENSITY, AT 5.4*, 15.3*, 23.3* AND 23.4* FOUR LINES OF MEDIUM INTENSITY AND AT 16.6*, 19.3*, 21.3*, 24.5*, 25.3*, 26.7*, 19.0* AND 30.7* EIGHT LINES OF LOW INTENSITY.
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Current AssigneeBerthold Honigmann, Hans Schroeder, Werner Deuschel, Werner Jettmar
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Original AssigneeBerthold Honigmann, Hans Schroeder, Werner Deuschel, Werner Jettmar
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InventorsDeuschel, Werner, BERTHOLD HONIGMANN, WERNER JETTMAR, Schroeder, Hans
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Application NumberUS04/185,817Time in Patent Office953 DaysField of SearchUS Class Current546/56CPC Class CodesC09B 48/00 Quinacridones
