Processes for lifting spent catalyst into a regenerator in...

Details Processes for lifting spent catalyst into a regenerator in... Processes for lifting spent catalyst into a regenerator in...

2005-02-03

2008-12-02

Caldarola, Glenn (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

C585S638000, C585S639000, C502S038000, C502S041000, C502S051000, C502S055000

Reexamination Certificate

active

07459595

ABSTRACT:
This invention provides processes for transporting catalyst, preferably in an oxygenate to olefins reaction system. In one embodiment, an oxygenate contacts molecular sieve catalyst particles in a reactor under conditions effective to form an effluent stream comprising light olefins and forming coked catalyst particles. At least a portion of the coked catalyst particles are transported from the reactor or a device associated therewith to a catalyst regenerator through a conduit in a fluidized manner with a fluidizing medium comprising air and steam. At least a portion of the coked catalyst particles are regenerated in the catalyst regenerator to form regenerated catalyst particles, which are ultimately directed back to the reactor.

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patent: WO 2004/013257 (2004-12-01), None

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