Invention Grant
- Patent Title: Oxidation process for preparing quinacridone pigments
- Patent Title (中): 制备喹吖啶酮颜料的氧化工艺
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Application No.: US10517412Application Date: 2003-07-08
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Publication No.: US07161007B2Publication Date: 2007-01-09
- Inventor: Fridolin Bäbler , Hans Rudolf Merstetter
- Applicant: Fridolin Bäbler , Hans Rudolf Merstetter
- Applicant Address: US NY Tarrytown
- Assignee: Ciba Specialty Chemicals Corporation
- Current Assignee: Ciba Specialty Chemicals Corporation
- Current Assignee Address: US NY Tarrytown
- Agent Shiela A. Loggins
- International Application: PCT/EP03/07337 WO 20030708
- International Announcement: WO2004/007623 WO 20040122
- Main IPC: C07D471/02
- IPC: C07D471/02 ; C09B48/00
Abstract:
The present invention relates to a process of preparing quinacridone by oxidizing a 6,13-dihydroquinacridone salt corresponding to the quinacridone pigment with hydrogen peroxide as the oxidizing agent in the presence of 2,7-anthraquinone disulfonic acid as catalyst. The inventive process is economical and environmentally friendly and yields high performance quinacridone pigments in a high yield.
Public/Granted literature
- US20050176959A1 Oxidation process for preparing quinacridone pigments Public/Granted day:2005-08-11
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