Selective production of o-alkyl phenols

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 39/06 (2006.01) C07C 37/00 (2006.01) C07C 37/11 (2006.01) C07C 37/16 (2006.01) C07C 39/07 (2006.01) C07B 61/00 (2006.01)

Patent

CA 2447631

The invention relates to a method for producing o-alkylphenols by reacting phenol with an alkanol at an elevated temperature in the gaseous phase and in the presence of a metal oxide catalyst, whereby the reaction is carried out in at least two steps and, in each reaction step, the mole ratio alkanol/phenol is adjusted to a value of about <= 0.4. A significant increase in the selectivity for the o-alkylphenol is thus obtained.

L'invention concerne un procédé de production de o-alkylphénols, consistant à faire réagir du phénol avec un alcanol à température élevée en phase gazeuse et en présence d'un catalyseur d'oxyde métallique. Selon ce procédé, la mise en réaction s'effectue en au moins deux étapes et, à chaque étape de la réaction, le rapport molaire alcanol/phénol est réglé sur une valeur environ inférieure ou égale à 0,4. On obtient ainsi une augmentation sensible de la sélectivité pour le o-alkylphénol.

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