申请人:TOYO INK MANUFACTURING CO., LTD.
公开号:EP0567651A1
公开(公告)日:1993-11-03
A process for preparing a pigment from a 2,9-dimethylquinacridone compound which comprises throwing a solution of a crude 2,9-dimethylquinacridone compound in sulfuric acid into the flow of water to yield fine precipitates, separating the precipitates by filtration, washing the same with water, adding the washed precipitates to a C₁ to C₄ lower alcohol, and heating the same to 60 to 200 °C.
一种用 2,9-二甲基喹吖啶酮化合物制备颜料的工艺,包括将 2,9-二甲基喹吖啶酮化合物粗品在硫酸中的溶液倒入水流中,生成细小沉淀物,过滤分离沉淀物,用水洗涤沉淀物,将洗涤后的沉淀物加入 C₁至 C₄低级醇中,加热至 60 至 200 °C。