Process for preparing 2,6-dialkylnaphtalene

C - Chemistry – Metallurgy – 07 – C

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C07C 15/24 (2006.01) B01J 23/882 (2006.01) B01J 23/883 (2006.01) B01J 29/064 (2006.01) C07C 4/18 (2006.01) C07C 5/27 (2006.01) C07C 7/13 (2006.01) C10G 45/00 (2006.01)

Patent

CA 2368607

A process for producing 2,6-dialkylnaphtalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphtalene isomers, monoalkynaphtalene isomers, polyalkylnaphtalenes, and naphtalene, is provided that includes the following steps: I) separating the hydrocarbon feedstock and/or a dealkylation product fed from step III into a naphtalene fraction, a monoalkylnaphtalene fraction, a dialkylnaphtalene fraction and a remaining products fraction; II) separating and purifying 2,6- dialkylnaphtalene from the dialkylnaphtalene fraction of step I; III) dealkylating the hydrocarbon feedstock and/or the remaining products fraction of step I and feeding the dealkylation product to step I; and IV) alkylating the naphtalene and monoalkylnaphtalene fractions of step I; wherein the hydrocarbon feedstock is fed to step I or step III.

L'invention porte sur un procédé de préparation de 2,6-dialkylnaphtalène à partir d'une charge d'alimentation hydrocarbonée contenant au moins un composant sélectionné dans le groupe constitué par des isomères de dialkylnaphtalène, des isomères de monoalkylnaphtalène, des polyalkylnaphtalènes, et du naphtalène. Le procédé consiste à: I) séparer la charge d'alimentation hydrocarbonée et/ou un produit de désalkylation alimenté à partir de l'étape III) dans une fraction de naphtalène, une fraction de monoalkylnaphtalène, une fraction de dialkylnaphtalène, et une fraction des produits restant; II) séparer et purifier le 2,6-dialkylnaphtalène de la fraction de dialkylnaphtalène de l'étape I); III) désalkyler la charge d'alimentation hydrocarbonée et/ou la fraction des produits restant de l'étape II), et alimenter le produit de désalkylation à l'étape I); et IV) alkyler les fractions de naphtalène et les fractions de monoalkylnaphtalène de l'étape I), la charge d'alimentation hydrocarbonée étant alimentée à l'étape I) ou à l'étape III).

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