TY - JOUR
T1 - Characterization of a bentonitic clay and its application as catalyst in the preparation of benzyltoluenes and oligotoluenes
AU - Miranda, René
AU - Ríos, Hulme
AU - Delgado, Francisco
AU - Castro, Miguel
AU - Cogordán, Antonio
AU - Salmón, Manuel
PY - 2003/5/15
Y1 - 2003/5/15
N2 - The preparation of oligomeric toluenes catalyzed with a bentonitic clay, using thermal energy and ultrasound, was performed and evaluated. When ortho and para benzyltoluenes were studied, the oligomerization reaction was found to be dependent of the catalyst amount, reaction time, temperature and the presence of pyridine as competitive inhibitor. A proposal for the molecular structure calculation analysis at semiempirical AM1 level was proposed based on the regioselectivity and in the oligomerization pathway. Furthermore, a detailed study to characterize the clay was performed, thus several physicochemical properties of the clay were determinated by means of: 29Si and 27Al MAS-NMR, X-ray diffraction, X-ray fluorescence, scanning electron microscopy, IR spectrophotometry, thermal analysis (DTA, TG-DTG), and adsorption techniques (N2-BET).
AB - The preparation of oligomeric toluenes catalyzed with a bentonitic clay, using thermal energy and ultrasound, was performed and evaluated. When ortho and para benzyltoluenes were studied, the oligomerization reaction was found to be dependent of the catalyst amount, reaction time, temperature and the presence of pyridine as competitive inhibitor. A proposal for the molecular structure calculation analysis at semiempirical AM1 level was proposed based on the regioselectivity and in the oligomerization pathway. Furthermore, a detailed study to characterize the clay was performed, thus several physicochemical properties of the clay were determinated by means of: 29Si and 27Al MAS-NMR, X-ray diffraction, X-ray fluorescence, scanning electron microscopy, IR spectrophotometry, thermal analysis (DTA, TG-DTG), and adsorption techniques (N2-BET).
KW - Bentonitic clay
KW - Benzyltoluenes
KW - Heterogeneous catalysis
KW - Oligotoluenes
UR - http://www.scopus.com/inward/record.url?scp=0038297683&partnerID=8YFLogxK
U2 - 10.1016/S0926-860X(02)00566-5
DO - 10.1016/S0926-860X(02)00566-5
M3 - Artículo
SN - 0926-860X
VL - 244
SP - 217
EP - 233
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 2
ER -