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859324 
Journal Article 
Vapor phase alkylation of ammonia with octanol over pillared and uranyl ion-exchanged montmorillonites 
Azzouz, A; Messad-Challal, D; Dumitriu, E; Amokrane, S; Nibou, D; Abbad, B; Chertouk-Moknine, L; Saber, M; Carja, G 
1997 
1 
Revue Roumaine de Chimie
ISSN: 0035-3930 
42 
10 
1019-1024 
WOS:000072470900010 
The vapor phase alkylation of ammonia with n-octanol-1 was achieved using an algerian bentonite (Maghnia deposit), containing mainly montmorillonite, previously transformed into the Na form. The latter was pillared with Al-13 and/or ion-exchanged with [UO22+] cations. The reactions tests were performed at 300 degrees C, a weight hourly space velocity (WHSV) of 1 h(-1) with respect to octanol, and an overall time on stream of 90 minutes. The main products formed were mono-and dioctylamine, and only small amounts of trioctylamine. The incorporation of [Al-13(7+)] pillars and/or of uranyl cations induces an increase in the d(001) basal spacing from 12.40 to ca. 18 Angstrom and improves the clay acidity and the catalytic properties. The catalytic activity depends both on the clay acidity and the ion exchange percent. The pillared clay ion-exchanged further with UO22+ cations exhibits the highest catalytic activity, suggesting a possible synergetic effect of pillaring and ion exchange.