Niobium-doped vanadium/phosphorus mixed oxide catalyst

Details Niobium-doped vanadium/phosphorus mixed oxide catalyst Niobium-doped vanadium/phosphorus mixed oxide catalyst

B - Operations, Transporting

01

J

B01J 27/198 (2006.01) B01J 23/22 (2006.01) C07C 51/215 (2006.01)

Patent

CA 2534293

Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.

Procédé de préparation d'un catalyseur sous forme d'oxyde mélangé de vanadium / phosphore modifié pour l'oxydation partielle den-butane en anhydride maléique. Ledit catalyseur contient du pyrophosphate de vanadyle en tant que constituant principal et du niobium en tant qu'élément promoteur dans une quantité correspondant à un rapport atomique du vanadium au niobium de l'ordre de 250/1 à 60/1. Ce catalyseur possède une activité améliorée, permet un meilleur rendement d'anhydride maléique et révèle une performance optimale dès le début de sa durée de vie catalytique.

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