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A series of high purity monoalkyl methylnaphthalene intermediates were prepared by alkylation of β-methylnaphthalene with a series of different chain lengths of n-bromoalkanes. Gas chromatography and gas chromatography-mass spectrometry were used as appropriate methods for this technology. The reaction conditions were optimized. The effect of dosage of catalysts, the molar ratio of β-methyl naphthalene to bromoalkane and of the solvent to β-methyl naphthalene, the reaction time as well as the temperature had also been investigated in detail. The optimal reaction conditions of alkylation have been achieved, and the reaction results were discussed. Based on the optimal reaction conditions, a series of monoalkylmethylnaphthalene intermediates, hexyl-, octyl-, decyl-, dodecyl-, tetra-decyl-methyl-naphthalenes had been prepared.

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Study on the Synthesis and Properties of Novel Alkyl Methylnaphthalene Sulfonate Surfactants: Part 1 Synthesis of Monoalkylated Methylnaphthalene Intermediates for Surfactants