US PATENT SUBCLASS 502 / 44
.~.~.~.~ Indirectly heating or cooling spent material within regeneration zone or prior to entry into regeneration zone

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}
44.~.~.~.~ Indirectly heating or cooling spent material within regeneration zone or prior to entry into regeneration zone

DEFINITION

Classification: 502/44

Indirectly heating or cooling spent material within regeneration zone or prior to entry into regeneration zone:

(under subclass 41) Process employing a heat exchanger to change the temperature of the sorbent or catalyst before or during contact with the treating gas.

(1) Note. Heating of the treating gas, autogenous heating and directly contacting the material with a heating or cooling medium do not satisfy the requirement of indirectly heating the spent material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40, for a similar process in which heat is added by use of an admixed solid heat carrier.