Alkylation of benzene to form linear alkylbenzenes using...

C - Chemistry – Metallurgy – 07 – C

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C07C 2/68 (2006.01) C07C 2/66 (2006.01) C07C 15/107 (2006.01) B01J 27/12 (2006.01) B01J 29/18 (2006.01) B01J 37/26 (2006.01)

Patent

CA 2346853

This invention is directed to a fluorine-containing mordenite catalyst and use thereof in the manufacture of linear alkylbenzene (LAB) by alkylation of benzene with an olefin. The olefin may have from about 10 to 14 carbons. The fluorine-containing mordenite is prepared typically by treatment with an aqueous hydrogen fluoride solution. The benzene alkylation may be conducted using reactive distillation. This invention is also directed to a process for production of LAB having a high 2-phenyl isomer content by use of the fluorine-containing mordenite in conjunction with a conventional solid LAB alkylation catalyst. The two catalysts may be used in a mixed catalyst bed or may be packed in series, with the relative proportions being adjusted to provide a desired 2-phenyl isomer content in the final product.

La présente invention concerne un catalyseur à mordénite renfermant du fluor et son emploi dans la fabrication d'alkylbenzènes linéaires (LAB) par alkylation du benzène avec une paraffine. Cette paraffine peut comporter de 10 à 14 atomes de carbone. La mordénite fluorée s'obtient généralement par traitement avec une solution aqueuse de fluorure d'hydrogène. L'alkylation du benzène peut se faire par distillation avec réaction. Cette invention concerne également la production de LAB à teneur élevée en 2-phényle isomère au moyen d'une mordénite fluorée avec un catalyseur d'alkylation LAB solide classique. Les deux catalyseurs peuvent être utilisés dans un lit catalytique mélangé ou bien être empilés en série, avec ajustement des proportions relatives en vue de l'obtention de la teneur requise en 2-phényle isomère pour le produit final.

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