US PATENT SUBCLASS 585 / 442
.~.~.~ Using halogen or S

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
435  DF  .~ Having alkenyl moiety, e.g., styrene, etc. {4}
440  DF  .~.~ By dehydrogenation {4}
442.~.~.~ Using halogen or S

DEFINITION

Classification: 585/442

Using halogen or S:

(under subclass 440) Subject matter in which elemental or combined halogen or sulfur is added to the reaction mixture.

(1) Note. Often hydrogen from the compound which become the desired product chemically combines with a component of the halogen or sulfur compound.