.~.~> Using metal oxide- or sulfide-containing catalyst {2}
DEFINITION
Classification: 585/477
By isomerization:
(under subclass 400) Subject matter wherein the synthesis involves changing the molecular structure of the feed material without a change in its carbon or hydrogen content.
(1) Note. The isomerization may result in movement of a component, e.g., an alkyl side-chain, etc., to a different position on a ring of an aromatic, the rearrangement of carbon atoms within a side-chain, or the removal of a carbon atom from a side-chain to the ring, e.g., conversion of ethylbenzene to xylene, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
404, for an isomerization process which involves ring expansion or contraction.
407, for an isomerization process which involves forming a ring from a nonring moiety.
471+, for a process wherein aromatic isomerization takes place simultaneously with alkyl transfer.
476, for an isomerization process which involves opening a ring of a polycyclic feedstock or moving a ring from one carbon to another of a "side" chain or second ring.
