Liquid contacting of post-quench effluent vapor streams from...

Details Liquid contacting of post-quench effluent vapor streams from... Liquid contacting of post-quench effluent vapor streams from...

2008-07-08

2008-07-08

Griffin, Walter D. (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

C422S131000, C585S639000

Reexamination Certificate

active

07396513

ABSTRACT:
A process is provided for converting oxygenate to olefins from a fluidized bed reactor which comprises removal of catalyst fines from a quenched vaporous effluent by contacting with a liquid low in catalyst fines content, e.g., oxygenate feedstock, or by-product water from the oxygenates to olefins conversion which is stripped and/or filtered. The process typically comprises: contacting a feedstock comprising oxygenate with a catalyst comprising a molecular sieve under conditions effective to produce a deactivated catalyst having carbonaceous deposits and a product comprising the olefins; separating the deactivated catalyst from the product to provide a separated vaporous product which contains catalyst fines; quenching the separated vaporous product with a liquid medium containing water and catalyst fines, in an amount sufficient for forming a light product fraction comprising light olefins and catalyst fines and a heavy product fraction comprising water, heavier hydrocarbons and catalyst fines; treating the light product fraction by contacting with a liquid substantially free of catalyst fines to provide a light product fraction having reduced catalyst fines content and a liquid fraction of increased fines content; compressing the light product fraction having reduced catalyst fines content; and recovering the light olefins from the compressed light product fraction.

REFERENCES:
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patent: 6121504 (2000-09-01), Kuechler et al.
patent: 6312503 (2001-11-01), Fike et al.
patent: 6403854 (2002-06-01), Miller et al.
patent: 6459009 (2002-10-01), Miller et al.
patent: 6645459 (2003-11-01), Lynn
patent: 6870072 (2005-03-01), Lumgair et al.
patent: WO 2004/018387 (2004-03-01), None
patent: WO 2004/029009 (2004-04-01), None

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