Process for continuously regenerating catalyst particles

Details Process for continuously regenerating catalyst particles Process for continuously regenerating catalyst particles

2006-05-16

2006-05-16

Hendrickson, Stuart (Department: 1754)

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

C502S035000, C502S037000, C502S050000

Reexamination Certificate

active

07045477

ABSTRACT:
A process for continuously regenerating catalyst particles comprising: passing deactivated catalyst particles downwards in sequence through the first coke-burning zone, second coke-burning zone, oxychlorination zone, and calcination zone in the regenerator, wherein the catalyst particles are contacted with the regeneration gas from the second coke-burning zone, the supplemented dry air, and an inert gas in the first coke-burning zone; introducing an oxygen-containing regeneration gas from the second coke-burning zone into the regenerator, wherein said gas is contacted with the catalyst particles from the first coke burning zone; withdrawing the regeneration gas from the regenerator through the first coke-burning zone and, after the recovery system, recycling it to the second coke-burning zone. The regeneration gas may pass the catalyst bed in either a centrifugal or centripetal way. This process prevents the regeneration gas with a high water content from contacting the catalyst at a high temperature as in the conventional continuous coke-burning processes for regenerating catalyst particles and thereby reduces the decreasing rate of the specific surface area of the catalyst and prolongs its service life.

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