Naphthalene alkylation process using mixed h/nh3 form catalyst

C - Chemistry – Metallurgy – 07 – C

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C07C 15/24 (2006.01) B01J 29/08 (2006.01) B01J 37/30 (2006.01) C07C 2/66 (2006.01) C07C 2/86 (2006.01)

Patent

CA 2174513

Long chain alkyl substituted naphthalenes are produced by alkylating naphthalene with an olefin or other alkylating agent with at least 6, and usually 12 to 20 carbon atoms, in the presence of an alkylation catalyst comprising a zeolite having both ammonium and protonic species associated with the exchangeable sites of the zeolite. The zeolite is usually a large pore size zeolite such as USY. The presence of both ammonium and protonic species increases selectivity for production of long chain mono-alkyl substituted naphthalenes in preference to more highly substituted products.

Des naphthalènes substitués par des alkyles à longue chaîne sont produits par alkylation du naphthalène avec une oléfine ou autre agent d'alkylation possédant au moins 6 et généralement 12 à 20 atomes de carbone, en présence d'un catalyseur d'alkylation comprenant une zéolite comportant à la fois des espèces protoniques et d'ammonium associées aux sites échangeables de la zéolite. La zéolite est généralement une zéolite aux pores larges telle que celle décrite dand le brevet USY. La présence des espèces protoniques et d'ammonium accroît la sélectivité de production des naphthalènes substitués par des monoalkyles à longue chaîne, de préférence par rapport à des produits à substitution plus importante.

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