Process for treating aqueous slurry of pigment

摘要

A process for treating an aqueous slurry of pigment which comprises adding to the aqueous slurry a halogenated carbon medium which is in liquid state at room temperature and has at least one member selected from the group consisting of fluorine atom and chlorine atom in the molecule; agitating the aqueous slurry vigorously; separating the pigment in a form of cake containing the halogenated carbon medium; and drying the cake. According to the process of the present invention, a filtering step and a washing step can be eliminated and energy for drying can be greatly reduced. The pigment product obtained is excellent in brilliancy and clearness.