NAPHTHALENE ALKYLATION WITH PARTIAL RARE EARTH EXCHANGED CATALYST

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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 pr esence of an alkylation catalyst comprising a zeolite ha ving rare earths associated with less than 50 % of the exchangeable sites of the zeoli te. The zeolite is usually a large pore size zeolite suc h as zeolite USY. The partial exchange with rare earths increases the selectivity of the catalyst for the production of long chain mono-alkyl sub stituted naphthalenes in preference to more highly substituted products.