US PATENT SUBCLASS 558 / 456
.~.~.~.~.~ Purification or recovery of saturated hydrocarbon dinitriles (e.g., from mixtures with cyanocyclopentanonimine, 2-cyanocyclopenten-1-ylamine, etc.)


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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
435  DF  .~.~ Acyclic (e.g., purification of saturated nitriles, etc.) {9}
452  DF  .~.~.~ Nitrogen attached indirectly to the cyano group by nonionic bonding {4}
454  DF  .~.~.~.~ Plural cyano groups bonded directly to the same chain (e.g., adiponitrile, etc.) {3}
456.~.~.~.~.~ Purification or recovery of saturated hydrocarbon dinitriles (e.g., from mixtures with cyanocyclopentanonimine, 2-cyanocyclopenten-1-ylamine, etc.)


DEFINITION

Classification: 558/456

(under subclass 454) Processes wherein saturated hydrocarbon dinitriles are separated from impurities, or from a reaction medium.