US PATENT SUBCLASS 585 / 440
.~.~ By dehydrogenation

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.~.~ By dehydrogenation {4}
441  DF  .~.~.~> Plural stage or with plural separation procedures
442  DF  .~.~.~> Using halogen or S
443  DF  .~.~.~> Using elemental O
444  DF  .~.~.~> Using metal oxide, sulfide, or salt {1}

DEFINITION

Classification: 585/440

By dehydrogenation:

(under subclass 435) Subject matter in which hydrogen atoms are removed from a feedstock compound to produce the product.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, for a hydrogen-exchange disproportionation process in which the hydrocarbon which becomes more saturated is a desired product of the process.