US PATENT SUBCLASS 585 / 486
.~.~ Using extraneous agent in reaction zone, e.g., catalyst, etc.

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
483  DF  .~ By dealkylation {2}
486.~.~ Using extraneous agent in reaction zone, e.g., catalyst, etc. {2}
487  DF  .~.~.~> And steam
488  DF  .~.~.~> And H {1}

DEFINITION

Classification: 585/486

Using extraneous agent in reaction zone, e.g., catalyst, etc.:

(under subclass 483) Subject matter wherein part or all of the synthesis takes place in the presence of an added material, whether called a catalyst, a diluent, a heat carrier, etc., or not, which speeds a desired reaction or retards in undesired reaction and which does not supply a significant number of atoms of material to the final product.

(1) Note. Water and hydrogen are considered reactants in the processes of this subclass and not extraneous agents.