US PATENT SUBCLASS 585 / 422
.~ By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc.

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
422.~ By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc. {4}
423  DF  .~.~> With plural separation procedures
424  DF  .~.~> Plural stage or with preliminary treatment of feed
425  DF  .~.~> Ring carbon of one molecule joined to ring carbon of other {2}
428  DF  .~.~> Nonring moiety of one molecule bonded to nonring moiety of other, e.g., polystyrene, etc. {1}

DEFINITION

Classification: 585/422

By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc.:

(under subclass 400) Subject matter in which a polycyclic aromatic is produced by joining two or more entire cyclic molecules of a feedstock or the entire hydrocarbyl moieties of such molecule.

(1) Note. This subclass (422) is the locus for a process where a side-chain carbon of one molecule is joined to the ring carbon of another molecule, e.g., the manufacture of phenyl tolyl methane from toluene.

SEE OR SEARCH THIS CLASS, SUBCLASS:

361+, for analogous processes where none of the feedstock

molecules is aromatic.

438, and 446+, for a process wherein an aromatic ring moiety is condensed with a nonring moiety.

470, for a process wherein an aromatic compound is manufactured by condensation of a molecule with a fragment of another molecule.

502+, and 709+, for a condensation process wherein nonring moieties are condensed.