Separating solid particles from gas in a fluid bed reactor
AssigneeExxonMobil Chemical Patents Inc.
InventorKenneth R. Clem
Life of this patent
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Abstract
This invention is directed to a process for removing catalyst particles from a gas. The invention is particularly suited to separating particles from the gas in a vessel that has a dilute phase zone and a dense phase zone. An acoustic waveform is applied to the dilute phase zone to assist in separating small particles from the gas in the dilute phase zone.
Claims51
A process for removing catalyst particles from a dilute phase zone of a vessel and recovering the catalyst particles in a dense phase zone, comprising:
- flowing gas and catalyst particles into a dilute phase zone;
- applying an acoustic waveform to the dilute phase zone to agglomerate at least a portion of catalyst particles in the dilute phase zone;
- removing at least a portion of the agglomerated particles from the dilute phase zone;
- and
- recovering at least a portion of the removed particles in a dense phase zone.
A process for separating solid particles from a gas composition in a vessel having a dilute phase zone and a dense phase zone, wherein the dilute phase zone has a particle density less than that of the dense phase zone, the process comprising:
- flowing a gas composition containing solid particles through the dilute phase zone of the vessel;
- applying an acoustic waveform to the dilute phase zone to agglomerate at least a portion of the particles in the gas composition;
- flowing at least a portion of the gas and agglomerated particles through one or more cyclones to separate at least a portion of the agglomerated particles from the gas;
- and
- sending at least a portion of the separated particles to the dense phase zone of the vessel.
A process for separating catalyst particles from hydrocarbon, comprising:
- flowing a hydrocarbon feed gas through a fluidized catalyst bed to convert the feed gas to hydrocarbon product;
- flowing the hydrocarbon product through a dilute phase zone having a catalyst density less than that of the fluidized catalyst bed;
- contacting catalyst particles in the dilute phase zone with an acoustic waveform to agglomerate at least a portion of the catalyst particles;
- and
- flowing at least a portion of the agglomerated catalyst particles and hydrocarbon product to one or more cyclones to separate at least a portion of the agglomerated particles from the gas.
Dependencies are inferred from the claim text.