US PATENT SUBCLASS 585 / 330
.~.~.~ And a preliminary unsaturation step, e.g., cracking, dehydrogenation, etc.

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

310  DF  PLURAL SERIAL DIVERSE SYNTHESES {8}
324  DF  .~ To produce unsaturate {4}
329  DF  .~.~ Including polymerization of olefin {1}
330.~.~.~ And a preliminary unsaturation step, e.g., cracking, dehydrogenation, etc.

DEFINITION

Classification: 585/330

And a preliminary unsaturation step, e.g., cracking, dehydrogenation, etc.:

(under subclass 329) Subject matter wherein the polymerization step is subsequent to a step wherein the hydrogen content of a hydrocarbon molecule is reduced.

(1) Note. The polymerization step can immediately follow the cracking or dehydrogenation, or the unsaturation and polymerization can be separated by one or more other steps.

SEE OR SEARCH THIS CLASS, SUBCLASS:

613+, and 648+, for a cracking reaction, per se, to produce a diolefin or a monoolefin, respectively.

616+, and 654+, for a dehydrogenation reaction, per se, to produce a diolefin or monoolefin, respectively.