Transalkylation of 1,4-diisopropylbenzene with naphthalene over dealuminated mordenites

N.S. Nesterenko (1) , S.E. Timoshin (1) , A.S. Kuznetsov (1) , V. Montouillout (2) , F. Thibault-Starzyck (2) , Christian Fernandez (2) , J.P. Gilson (2) , F. Fajula (3) , I.I. Ivanova (1)

1 Department of Chemistry, Lomonosov Moscow State University
2 LCS - Laboratoire catalyse et spectrochimie
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

The transalkylation of diisopropylbenzene with naphthalene has been studied over two series of mordenite catalysts dealuminated by acid treatments and by combined calcination at 750°C and acid attack treatments, respectively. The nature and accessibility of the acid sites were studied by IR spectroscopy of adsorbed pyridine, 2,4,6-trimethylpyridine and 2,4,6-triethylpyridine. The highest yields of 2,6- and 2,7- diisopropylnaphtalenes and the highest stability of catalytic activity were observed over mordenites dealuminated by combined calcination and acid attack treatments. This dealumination procedure leads to the creation of a secondary mesopore network interconnecting structural micropores, which improves the acid sites accessibility, facilitates the transport of bulky reactants and products and prevents deactivation by pore blocking.

Mots clés: transalkylation; diisopropylbenzene; 2; 6-diisopropylnaphthalene; dealuminated mordenites

Domaines: Chimie

N.S. Nesterenko, S.E. Timoshin, A.S. Kuznetsov, V. Montouillout, F. Thibault-Starzyck, et al.. Transalkylation of 1,4-diisopropylbenzene with naphthalene over dealuminated mordenites. Studies in Surface Science and Catalysis, 2004, 154 C, pp.2163-2168. ⟨10.1016/s0167-2991(04)80473-7⟩. ⟨hal-01711623⟩