Process for regenerating and rejuvenating additive...

B - Operations – Transporting – 01 – J

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B01J 38/20 (2006.01) B01J 23/94 (2006.01) B01J 31/40 (2006.01) B01J 38/12 (2006.01) B01J 38/52 (2006.01) B01J 38/62 (2006.01) C10G 45/04 (2006.01) C10G 45/08 (2006.01)

Patent

CA 2378400

The present invention pertains to a process for regenerating and rejuvenating a used additive-based catalyst comprising the steps of regenerating the catalyst by contacting it with an oxygen- containing gas at a maximum temperature of 500°C, followed by rejuvenating the catalyst by contacting it with an organic additive, if necessary followed by drying at such a temperature that at least 50 % of the additive is maintained in the catalyst. Preferably, the maximum catalyst temperature during the regeneration step is 300-500°C, more preferably 320-475°C, even more preferably 350-425°C. The process according to the invention makes it possible to restore the activity of a used additive-based hydrotreating catalyst to its original level, or even to improve it to above that level.

La présente invention concerne un procédé permettant de régénérer un catalyseur à base d'additif. Ce procédé comprend les étapes consistant à régénérer le catalyseur en le plaçant en contact avec un gaz à base d'oxygène à une température maximale de 500 DEG C, avant de rajeunir ce catalyseur en le plaçant au contact d'un additif organique, et si nécessaire, de le sécher à une température telle qu'au moins 50 % de l'additif est maintenu dans le catalyseur. De préférence, la température maximale du catalyseur pendant l'étape de régénération est comprise entre 300 et 500 DEG C, de préférence, entre 320 et 475 DEG C, et même encore de préférence entre 350 et 425 DEG C. Le procédé selon l'invention permet de ramener l'activité d'un catalyseur d'hydrotraitement à base d'additif à son niveau d'origine, ou encore de l'améliorer pour l'amener à un niveau supérieur.

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