US PATENT SUBCLASS 502 / 43
.~.~.~.~ Plural distinct serial combustion stages

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  DF  .~.~.~ In gaseous suspension (e.g., fluidized bed, etc.) {3}
43.~.~.~.~ Plural distinct serial combustion stages

DEFINITION

Classification: 502/43

Plural distinct serial combustion stages:

(under subclass 41) Process including two or more sequential steps of energetic oxidation.

(1) Note. The serial combustion stages may occur in the same or different reaction zones by, in the first case, utilizing distinctly differing combustion conditions or, in the second case, causing a continuous flow of material through different reaction zones.