Separation of active catalyst particles from spent catalyst...

Details Separation of active catalyst particles from spent catalyst... Separation of active catalyst particles from spent catalyst...

B - Operations, Transporting

01

J

B01J 38/72 (2006.01) B01J 23/94 (2006.01) B01J 38/06 (2006.01) C09K 13/00 (2006.01) C10G 45/18 (2006.01)

Patent

CA 2078458

SEPARATION OF ACTIVE CATALYST PARTICLES FROM SPENT CATALYST PARTICLES BY AIR ELUTRIATION (D#79,464-F) ABSTRACT OF THE DISCLOSURE Spent hydrotreating catalyst having carbonaceous and metallic deposits and of regular geometric shape after being stripped of process oil is fluidized by flowing air upwardly through the catalyst at a velocity sufficient to expand the bed thereby segregating the catalyst particles into a high activity, upper, less-contaminated fraction and a lower, more-contaminated fraction and recycling the high activity fraction to a hydrotreating process. Optionally, the high activity fraction can be regenerated with carbon burnoff or rejuvenated by acid leaching followed by regeneration with carbon burnoff to further improve catalyst activity.

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