Process for producing alkylnaphthalenes

Details Process for producing alkylnaphthalenes Process for producing alkylnaphthalenes

C - Chemistry, Metallurgy

07

C

260/685

C07C 2/00 (2006.01) C07C 2/68 (2006.01) C07C 2/70 (2006.01)

Patent

CA 1041555

ABSTRACT OF THE DISCLOSURE A process for producing alkylnaphthalenes by alkylating naphthalene with an olefin having 2 to 4 carbon atoms, which comprises (1) introducing the olefin into a solution of crude naphthalene containing thianaphthene as an impurity in a solvent having a boiling point sufficiently different from the boiling point of the naphthalene and alkylnaphthalenes produced that the solvent is separable by distillation in the presence of (i) an aluminum chloride complex consisting of (a) aluminum chloride, (b) hydrogen chloride and (c) an alkylated benzene or naphthalene, or (ii) a solid aluminum chloride which is dissolved into the reaction solution by adding gaseous hydrogen chloride simultaneously with or prior to the introducing of the olefin, (2) aging the reaction solution, and (3) recovering the resulting alkylnaphthalenes, whereby alkylnaphthalenes, containing as mono- alkylnaphthalenes a predominant amount of a .beta.-monoalkylnaphthalene, are obtained in a high yield.

210715

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