US PATENT SUBCLASS 502 / 41
.~.~.~ In gaseous suspension (e.g., fluidized bed, etc.)

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

20  DF  REGENERATING OR REHABILITATING CATALYST OR SORBENT {4}
34  DF  .~ Gas or vapor treating {5}
38  DF  .~.~ Treating with free oxygen containing gas {8}
41.~.~.~ In gaseous suspension (e.g., fluidized bed, etc.) {3}
42  DF  .~.~.~.~> And substantially complete oxidation of carbon monoxide to carbon dioxide within regeneration zone
43  DF  .~.~.~.~> Plural distinct serial combustion stages
44  DF  .~.~.~.~> Indirectly heating or cooling spent material within regeneration zone or prior to entry into regeneration zone

DEFINITION

Classification: 502/41

In gaseous suspension, (e.g., fluidized bed, etc.):

(under subclass 38) Process wherein particles of material are contacted by a column of gas rising at a velocity which supports them in a state of turbulence.

SEE OR SEARCH CLASS

423, Chemistry of Inorganic Compounds, Dig. 16 for a collection of fluidization techniques.