US PATENT SUBCLASS 585 / 627
.~.~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc.

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
601  DF  .~ Diolefin product {4}
616  DF  .~.~ By dehydrogenation {3}
627.~.~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {3}
628  DF  .~.~.~.~> Moving catalyst or plural stage
629  DF  .~.~.~.~> Transition metal oxide or sulfide agent {1}
632  DF  .~.~.~.~> Metal salt agent

DEFINITION

Classification: 585/627

Using extraneous nonhydrocarbon agent, e.g., catalyst, etc.:

(under subclass 616) Subject matter wherein part or all of the synthesis takes place in the presence to a material which chemically affects the synthesis by promoting, retarding, etc., but which does not form a part of the desired product and is, at least in theory, separable from the desired reaction products. The agent may be a catalyst, solvent, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

403, 503, 537, 636, and 920, for processes which employ apparatus of recited composition, in some cases the composition (e.g., a reactor lining) being or containing a catalytic agent.