A method of restoring catalytic activity of a spent...

B - Operations – Transporting – 01 – J

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B01J 38/48 (2006.01) B01J 23/94 (2006.01) B01J 37/20 (2006.01) B01J 38/66 (2006.01) C10G 49/02 (2006.01)

Patent

CA 2553855

A method of restoring catalytic activity to a spent hydroprocessing catalyst that has a first carbon concentration. The concentration of carbon on the spent hydroprocessing catalyst is reduced to provide a carbon-reduced catalyst having a second carbon concentration that is less than the first carbon concentration. The carbon-reduced catalyst is exposed to a solution, comprising a chelating agent and a solvent, for an aging time period sufficient to provide for a restored catalytic activity thereby resulting in an aged catalyst having incorporated therein the chelating agent and the solvent. The aged catalyst is exposed to conditions, including a drying temperature, so as to remove from the aged catalyst a portion of the solvent without removing a significant portion of the chelating agent from the aged catalyst thereby resulting in a dried aged catalyst. The dried aged catalyst is hen sulfur treated to thereby provide a restored catalyst. The restored catalyst and those catalysts made by the treatment method can be used in a hydroprocessing process comprising contacting the restored catalyst with a hydrocarbon feedstock under hydroprocessing conditions.

L'invention concerne un procédé de restauration de l'activité catalytique d'un catalyseur d'hydrotraitement usé ayant une première concentration de carbone. On réduit la concentration de carbone du catalyseur d'hydrotraitement usé pour obtenir un catalyseur à carbone réduit ayant une deuxième concentration de carbone qui est inférieure à la première concentration de carbone. On expose le catalyseur à carbone réduit à une solution contenant un chélateur et un solvant pendant une période de vieillissement suffisante pour obtenir une activité catalytique restaurée, ce qui permet d'obtenir un catalyseur vieilli contenant le chélateur et le solvant. Le catalyseur vieilli est exposé aux conditions, y compris une température de séchage, de manière à retirer du catalyseur vieilli, une partie du solvant sans retirer une partie significative du chélateur du catalyseur vieilli, ce qui permet d'obtenir un catalyseur vieilli séché. Puis le catalyseur vieilli séché est traité au soufre pour ainsi obtenir un catalyseur restauré. Le catalyseur restauré et les catalyseurs produits selon le procédé de traitement, peuvent être utilisés dans un procédé d'hydrotraitement comportant la mise en contact du catalyseur restauré avec une alimentation en hydrocarbure dans des conditions d'hydrotraitement.

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