Naphthalene alkylation with partial rare earth exchanged...

Details Naphthalene alkylation with partial rare earth exchanged... Naphthalene alkylation with partial rare earth exchanged...

C - Chemistry, Metallurgy

07

C

C07C 2/66 (2006.01) C07C 2/86 (2006.01) C07C 15/24 (2006.01)

Patent

CA 2174512

Long chain alkyl substituted naphthalenes are produced by the alkylation of naphthalene with an olefin or other alkylating agent possessing at least 6 carbon atoms, usually 12 to 20 carbon atoms, in the presence of an alkylation catalyst comprising a zeolite having rare earths associated with less than 50 % of the exchangeable sites of the zeolite. The zeolite is usually a large pore size zeolite such as zeolite USY. The partial exchange with rare earths increases the selectivity of the catalyst for the production of long chain mono-alkyl substituted naphthalenes in preference to more highly substituted products.

Naphtalènes à substitution alkyle à chaîne longue obtenus par alkylation de naphtalène par une oléfine ou d'autres agents d'alkylation à au moins 6 atomes de carbone (généralement de 12 à 20), en présence d'un catalyseur d'alkylation comprenant une zéolite dont moins de 50 % des sites échangeables sont associés à des terres rares. La zéolite est généralement du type à pores larges telle que la zéolite USY. L'échange partiel avec les terres rares accroît la sélectivité du catalyseur pour ce qui est de la production de naphtalènes à substitution mono-alkyle à chaîne longue, de préférence aux produits à plus grande substitution.

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