US PATENT SUBCLASS 585 / 424
.~.~ Plural stage or with preliminary treatment of feed

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
422  DF  .~ By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc. {4}
424.~.~ Plural stage or with preliminary treatment of feed

DEFINITION

Classification: 585/424

Plural stage or with preliminary treatment of feed:

(under subclass 422) Subject matter wherein the effluent from an aromatic condensation reaction or wherein a feed stock is treated prior to the condensation reaction, e.g., by separating nonhydrocarbons therefrom, by separating the feed into several different fractions, by heating, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

300+, for a process wherein two or more reactions are

conducted in parallel.

320, for a process wherein an intermediate is formed in an aromatic synthesis process which results in a polycyclic product.