Patent ID: 6294009
Filing Date: 2001-09-25
Classification: C01B,C01P,C08K,C09D

Abstract:
A process for producing a tantalum(V) nitride pigment comprising:nitriding a tantalum(V) oxide, tantalum(V) oxide hydrate or tantalum(V) oxide nitride with ammonia at 500 to 1100.degree. C. in the presence or absence of a flux to obtain a nitrided product,treating the nitrided product before or after washing out the optionally present flux, in a salt melt comprising one or more salts, said salt melt having a melting point in the range from 100 to 600.degree. C. for 1 to 100 minutes at 100 to 600.degree. C., andextracting the tantalum(V) nitride pigment by dissolving said one or more salts in water.