Pigment granulation
AssigneeCiba Specialty Chemicals Corporation
InventorPaolo Balliello
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Abstract
The invention relates to a process for granulating a free-flowing pulverulent organic pigment, which comprises treating the pigment at a temperature from 15 to 120.degree. C. with from 7 to 200% by weight, based on the dry weight of the pigment, of at least one gaseous inert substance which contains oxygen in its molecule, is liquid at 20.degree. C./1 bar and has a boiling point of not more than 150.degree. C.
Claims15
A process for granulating a free-flowing pulverulent organic pigment, which comprises treating the pigment at a temperature from 15 to 120.degree. C. with from 7 to 200% by weight, based on the dry weight of the pigment, of at least one gaseous inert substance which contains oxygen as a molecular component, is liquid at 20.degree. C./1 bar and has a boiling point of not more than 150.degree. C.
Dependencies are inferred from the claim text.