Process for the preparation of inclusion pigments

摘要

Reaction spray process for preparing inclusion pigments by suspending the pigment to be encapsulated in an aqueous solution or suspension of a precursor of the inclusion material, spraying the suspension, with or without the addition of nitric acid and fuel, in a tubular reactor heated at from 850 DEG to 1100 DEG C., separating the inclusion pigment from the product stream and, if desired post-calcining the pigment at a temperature of at least 816 DEG C.