Monofunctional reforming catalyst containing bismuth

Details Monofunctional reforming catalyst containing bismuth Monofunctional reforming catalyst containing bismuth

C - Chemistry, Metallurgy

10

G

C10G 35/095 (2006.01) B01J 29/62 (2006.01) B01J 29/64 (2006.01)

Patent

CA 2315769

A catalytic reforming process is disclosed using a catalyst containing a Group VIII metal, low amounts of bismuth, and a zeolite L. The catalyst is a non- acidic, monofunctional reforming catalyst. Preferably, the catalyst contains one or more halogens. Preferably, the feed includes C8 hydrocarbons. The addition of small amounts of bismuth increase or substantially maintain catalyst stability. Unexpectedly low dealkylation rates are achieved using the catalyst while reforming to produce aromatics, especially to produce xylenes such as paraxylene.

On décrit un procédé de reformage catalytique dans lequel on utilise un catalyseur contenant un métal du Groupe VIII, de faibles quantités de bismuth et une zéolite L. Le catalyseur est un catalyseur de reformage monofonctionnel, non acide. Le catalyseur contient de préférence un ou plusieurs halogènes. La charge comprend de préférence des hydrocarbures C¿8?. Le fait d'ajouter de petites quantités de bismuth permet d'accroître ou de maintenir sensiblement la stabilité du catalyseur. On obtient des taux de désalkylation imprévisiblement faibles lorsqu'on utilise le catalyseur pendant le reformage pour produire des aromatiques, plus particulièrement pour produire des xylènes tels que du paraxylène.

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