US PATENT SUBCLASS 585 / 407
.~ By ring formation from nonring moiety, e.g., aromatization, etc.

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
407.~ By ring formation from nonring moiety, e.g., aromatization, etc. {7}
408  DF  .~.~> Nonhydrocarbon feed {1}
410  DF  .~.~> Aromatic feed {1}
412  DF  .~.~> Plural stage, with moving catalyst or with specified flow rate or procedure
413  DF  .~.~> With preliminary treatment of feed or plural separation procedures
414  DF  .~.~> Using metal-free H acceptor
415  DF  .~.~> Product compound has more C atoms than feed compound, e.g., cyclic polymerization, etc. {2}
418  DF  .~.~> Using transition metal-containing catalyst {2}

DEFINITION

Classification: 585/407

By ring formation from nonring moiety, e.g., aromatization, etc.:

(under subclass 400) Subject matter wherein carbon atoms which make up a ring or part of a ring in the desired aromatic product enter the reaction as part of an acyclic moiety.

(1) Note. Where a ring is formed by the joining together of

carbon atoms already contained in one or more rings of a molecule, e.g., conversion of dinaphthyl to perylene, etc., classification in subclass 400 is proper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

358, and 365, for a similar phenomenon in the manufacture of an alicyclic hydrocarbon.

406, for a similar phenomenon where the moiety is the side-chain of a vinyl aromatic.