Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Patent
1999-08-20
2000-12-26
Knode, Marian C.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
585639, 585640, 585641, 585642, 422141, 422142, 422143, 422144, 422145, 422147, C07C 100, F27B 1500, F27B 1508
Patent
active
061662828
ABSTRACT:
An oxygenate conversion process and fast-fluidized bed reactor are disclosed having an upper disengaging zone and a lower reaction zone. The process is carried out in a reaction zone having a dense phase zone in the lower reaction zone and a transition zone which extends into the disengaging zone. The feedstock in the presence of a diluent is passed to the dense phase zone containing a non-zeolitic catalyst to effect at least a partial conversion to light olefins and then passed to the transition zone above the dense phase zone to achieve essentially complete conversion. A portion of the catalyst is withdrawn from above the transition zone in the disengaging zone, at least partially regenerated, and returned to a point above the dense phase zone, while catalyst is continuously circulated from the disengaging zone to the lower reaction zone. The process includes a first separation zone in the disengaging zone between the transition zone and at least one cyclone separation stage to separate catalyst from the reaction product. The process and apparatus provide a method for carrying out the overall conversion reaction with a significantly reduced catalyst inventory compared to conventional bubbling bed reactors.
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Dang Thuan D.
Knode Marian C.
Molinaro Frank S.
Silverman Richard P.
Tolomei John G.
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