US PATENT SUBCLASS 585 / 734
.~ By isomerization

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

700  DF  SATURATED COMPOUND SYNTHESIS {11}
734.~ By isomerization {9}
735  DF  .~.~> Using temperature gradient or material concentration gradient or introduction of same material at more than two serially spaced points of reaction zone system
736  DF  .~.~> Plural isomerization stages
737  DF  .~.~> With preliminary treatment of paraffin feed
738  DF  .~.~> With specified isomerizate purification or separation procedure
739  DF  .~.~> Using aluminosilicate catalyst
740  DF  .~.~> Using B- or P-containing catalyst
741  DF  .~.~> Using Al halide catalyst {5}
747  DF  .~.~> Using halogen-containing catalyst {1}
750  DF  .~.~> Using metal oxide or hydroxide catalyst {1}

DEFINITION

Classification: 585/734

By isomerization:

(under subclass 700) Subject matter wherein a paraffin hydrocarbon undergoes a skeletal rearrangement of its carbon atoms.

(1) Note. The hydrocarbon may go from a straight chain configuration to a branched configuration, for a less branched to a more branched configuration, or it may go in the reverse order from a more branched to a less branched or to a straight configuration.

(2) Note. This subclass (734) is the locus for

skeletal-type isomerization utilizing a catalyst that is not provided for in any of the indented subclasses below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

350, 477, 601, and 671, for skeletal isomerization reactions which produce alicyclic, aromatic, diolefin, and olefin products, respectively.

371+, for skeletal isomerization which results in enlarging or contracting an alicyclic ring.

375+, 470+, 643+, and 708, for processes in which a hydrocarbyl moiety from one molecule is transferred to another molecule to produce an alicyclic, aromatic, olefinic, or paraffin compound, respectively.