Fines co-feed for maintaining efficient reactor hydrodynamics

Details Fines co-feed for maintaining efficient reactor hydrodynamics Fines co-feed for maintaining efficient reactor hydrodynamics

2007-05-29

2007-05-29

Caldarda, Glenn (Department: 1764)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

With heat conservation or using solid or molten inert heat...

C209S154000, C208S152000

Reexamination Certificate

active

10835494

ABSTRACT:
This invention provides processes for maintaining a desired particle size distribution in an oxygenate to olefin reaction system. In one embodiment, the invention comprises replacing lost catalyst fines with less active co-catalyst particles. By adding less active co-catalyst particles to the reaction system, desirable fluidization characteristics and hydrodynamics can be maintained without affecting the overall (or primary catalyst) performance and product selectivities. The invention is also directed to a population of catalyst particles having a desirable particle size distribution well-suited for realizing ideal fluidization and hydrodynamic characteristics.

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