US PATENT SUBCLASS 558 / 313
.~.~.~.~ Liquid phase reaction

Current as of: June, 1999
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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}
308  DF  .~.~ Processes for forming the cyano group {7}
311  DF  .~.~.~ Reactant is a carboxylic acid, or an amide, anhydride, ester, halide, or salt thereof {2}
313.~.~.~.~ Liquid phase reaction

DEFINITION

Classification: 558/313

(under subclass 311) Processes wherein the reaction is conducted in liquid phase.

(1) Note. An example of process provided for herein is: the preparation of malononitrile by reacting cyanoacetamide with phosphorus oxychloride and an alkaline earth metal salt in the presence of ethylene dichloride solvent.