Process for regenerating a high temperature treated zeolite...

B - Operations – Transporting – 01 – J

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B01J 29/90 (2006.01) B01J 38/18 (2006.01) C10G 35/06 (2006.01) C10G 35/095 (2006.01)

Patent

CA 2220685

Provied is a process for regenerating a high temperature treated reforming catalyst which has been deactivated due to coke deposition and which catalyst comprises at least one Group VIII metal. The process comprises first burning coke from the catalyst by contacting the catalyst with an oxygen containing gas. The catalyst is then reduced by contacting the catalyst with a reducing gas, preferably hydrogen. The catalyst is then treated at a temperature in the range of from 975~ to less than 1150 ~F. This last treatment step can take place in either a reducing atmosphere, or in an inert gaseous atmosphere. It is also preferred that the last step be conducted while maintaining the water level of the effluent gas below 200 ppmv.

Le procédé décrit sert à régénérer un catalyseur reformé traité à haute température désactivé par des incrustations de coke et comprenant au moins un métal du groupe VIII. Selon ce procédé, on brûle premièrement le coke déposé sur le catalyseur en mettant le catalyseur en contact avec un gaz qui contient de l'oxygène. On réduit ensuite le catalyseur en le mettant en contact avec un gaz réducteur, de préférence l'hydrogène, puis on le traite à une température dans une plage comprise entre 975· et moins de 1150 ·F. Cette dernière étape du traitement peut s'effectuer soit dans une atmosphère réductrice, soit dans une atmosphère gazeuse inerte. Il est en outre préférable de conduire cette dernière étape tout en maintenant le niveau d'humidité des effluents gazeux au-dessous de 200 ppmv.

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