| 摘要 |
Nitriding of alumina is carried out at above 700 deg. C using CN radicals, pref. CN- or Cy radicals, esp. in a gaseous media in the presence of a hydrocarbon or a carbon cpd..Pref., the alumina is treated in the presence of a hydrocarbon or carbon cpd. (esp. acetonitrile or monomethylamine) in a gaseous medium contg. nitrogen (cpd.) and hydrogen (esp. NH3 in amount more than 50, esp. more than 85%), the hydrogen content being such that all the oxygen in the alumina reacts with the hydrogen to form water which reacts with the hydrocarbon or carbon to form CO and H2, the CO reacting with the nitrogen (cpd.) to form the CN radicals. The alumina is treated at 1000-1500 (esp. 1200-1400) deg. C, the NH3/Al2O3 molar ratio being greater than 1 (pref. greater than 1.6) and the C/Al2O3 molar ratio being 0.4-1.2.
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| 申请人 |
LABORATOIRE DE CATALYSE ET CHIMIE DES MATERIAUX DIVISES UNIVERSITE CATHOLIQUE DE LOUVAIN, LOUVAIN-LA-NEUVE, BE;CENTRE DE RECHERCHE DE L'INDUSTRIE BELGE DE LA CERAMIQUE, MONS, BE;LABORATOIRE DE CATALYSE HETEROGENE ET HOMOGENE UNIVERSITE DES SCIENCES ET TECHNIQUES DE LILLE, VILLENEUVE D'ASCQ CEDEX, FR;LABORATOIRE DES MATERIAUX INDUSTRIELS UNIVERSITE DE VALENCINNES ET DU HAINAUT CAMBRESIS, VALENCIENNES CEDEX, FR |
发明人 |
COLQUE, SOFIA, LOUVAIN-LA-NEUVE, BE;BASTIANS, PHILIPPE, CEROUX-MOUSTY, BE;GRANGE, PAUL, BIERGES, BE;DELMON, BERNARD, LIMELETTE, BE |
