US PATENT SUBCLASS 585 / 464
.~.~.~ HF

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
446  DF  .~ By condensation of entire molecules or entire hydrocarbyl moieties thereof, e.g., alkylation, etc. {13}
462  DF  .~.~ Using halogen-containing catalyst {3}
464.~.~.~ HF

DEFINITION

Classification: 585/464

HF:

(under subclass 462) Subject matter wherein the catalyst is hydrogen fluoride alone or in a composition with other materials.

SEE OR SEARCH THIS CLASS, SUBCLASS:

456, for a process of introducing a side-chain of more than five carbon atoms to the ring wherein hydrogen fluoride is used as the catalyst.

723+, for a process wherein two nonring molecules are joined together, e.g., alkylation, etc., which also utilizes a hydrogen fluoride catalyst.