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(11) | EP 1 306 420 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Process for controlling oxidation of nitrogen and metals in circulating fluidized solids contacting process |
| (57) A fluidized particulate solids contacting process for reducing regenerator flue gas
NOx emissions and/or permitting operating with an increased equilibrium solids vanadium
level, which process may be an FCC process or a fluidized particulate solid hydrocarbon
treating process, wherein spent FCC catalyst or other spent solid is in a regenerator
with an oxygen-containing regeneration gas under catalyst (solid) regeneration conditions
which include a combination of at least a regeneration temperature and an oxygen level
in the regeneration gas which is effective to burn off the spent solid a majority
of carbonaceous deposits thereon, while substantially preventing the formation of
NOx, and thereby produce a regenerated solid having a carbon level reduced from that
of the spent solid and a flue gas; maintaining the regenerated solid in a fluidized
state with a fluidizing media that substantially prevents any further oxidation or
regeneration; and returning the fluidized regenerated solid to the reactor (contactor)
used in the process. |