US PATENT SUBCLASS 585 / 723
.~.~.~ HF

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

700  DF  SATURATED COMPOUND SYNTHESIS {11}
709  DF  .~ By condensation of a paraffin molecule with an olefin-acting molecule, e.g., alkylation, etc. {11}
721  DF  .~.~ Using extraneous nonhydrocarbon agent {6}
723.~.~.~ HF {1}
724  DF  .~.~.~.~> With additional nonhydrocarbon agent {1}

DEFINITION

Classification: 585/723

HF:

(under subclass 721) Subject matter wherein an agent is hydrogen fluoride.

SEE OR SEARCH THIS CLASS, SUBCLASS:

702, for a paraffin synthesis procedure in which HF catalyst is also used as an agent for hydrocarbon separation or purification.

710, for an alkylation process which includes the recycle of HF removed from a compound or a complex contained in the alkylation effluent.

716, for a process wherein fluoride is present in at least one stage of a plural-stage alkylation process.