Process for treating aqueous slurry of pigment

Compositions: coating or plastic – Materials or ingredients – Miscellaneous

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106262, 106308Q, C04B 1400, C09C 100

Patent

active

045954178

ABSTRACT:
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.

REFERENCES:
patent: 3129053 (1964-04-01), Castle
patent: 3509061 (1970-04-01), Zisman et al.
patent: 3974089 (1976-08-01), Owen et al.

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