Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed
Reexamination Certificate
2005-12-02
2010-11-09
Singh, Prem C (Department: 1797)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
From nonhydrocarbon feed
C585S638000, C585S640000, C585S641000, C585S642000, C422S062000, C422S108000, C422S110000, C422S012000, C422S119000, C422S139000, C422S140000, C422S141000, C422S142000, C422S143000, C208S247000, C208S299000, C208S305000
Reexamination Certificate
active
07829750
ABSTRACT:
The present invention relates to processes for fluidizing a population of catalyst particles that are depleted of catalyst fines. In one embodiment, the process includes providing a plurality of catalyst particles in the reactor, wherein the catalyst particles have a d2value of greater than about 40 microns. The catalyst- particles are contacted with a fluidizing medium under conditions effective to cause the catalyst particles to behave in a fluidized manner and form a fluidized bed. The particles are contacted with one or more primary obstructing members while in the fluidized bed. By fluidizing the catalyst particles in this manner, the catalyst particles can be maintained at an axial gas Peclet number of from about 10 to about 20.
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Beech, Jr. James H.
Coute Nicolas
Nicoletti Michael Peter
Smith Jeffrey S.
ExxonMobil Chemical Patents Inc.
Faulkner Kevin M.
Reid Frank E.
Singh Prem C
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