Process for the production of yellow to red pigments based on nitrides and oxidenitrides
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 30, 2002
Grant Date -
N/A
app pub date -
Feb 22, 2000
filing date -
Feb 23, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Nitride or oxidenitride based red to yellow pigments, such as tantalum(V) nitride and oxidenitrides containing tantalum may be produced by passing ammonia over nitridable metal compounds, in particular oxide compounds, at 700 to 1250.degree. C. According to the invention, nitriding proceeds in a rotary tube or fluidised bed reactor in the presence of an oxide from the series SiO.sub.2, ZrO.sub.2, GeO.sub.2, SnO.sub.2, TiO.sub.2 and HfO.sub.2 under conditions under which this oxide is substantially not nitrided.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully