US PATENT SUBCLASS 502 / 20
REGENERATING OR REHABILITATING CATALYST OR SORBENT

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

20REGENERATING OR REHABILITATING CATALYST OR SORBENT {4}
21  DF  .~> Including segregation of diverse particles
22  DF  .~> Treating with a liquid or treating in a liquid phase, including dissolved or suspended {5}
34  DF  .~> Gas or vapor treating {5}
56  DF  .~> By heat

DEFINITION

Classification: 502/20

REGENERATING OR REHABILITATING CATALYST OR SORBENT:

(under the class definition) Process of treating a composition, which has been in use, to restore it to a state of intended function by (a) removing accumulated extraneous material, (b) replacing a lost essential or perfecting component, (c) rearranging disturbed elements into a former functionally useful configuration, or (d) subjecting spent material to a force or environment serving to make it again active for its intended function.

(1) Note. A steam treatment which is claimed to activate spent carbon sorbent is provided for in this or an indented subclass even though there is no disclosure of removal of contaminant or addition of material.

(2) Note. Combinations of regeneration or reactivation of an adsorbent and the recovery of the adsorbed material are classified on the basis of the material recovered.

SEE OR SEARCH CLASS

34, Drying and Gas Vapor Contact With Solids, for processes

of regenerating catalysts or adsorbents by drying only.

201, Distillation: Processes, Thermolytic, appropriate subclasses for a process of carbonizing by thermolytic distillation.

202, Distillation: Apparatus, for apparatus for making or reactivating bone black and other carbonaceous adsorbents by destructive distillation. 208, Mineral oils: Processes and Products, for processes of converting or refining mineral oils which also includes the steps of reactivating the catalyst or adsorbent used in the process.