Patent ID: 8337796

Claim:
A process for removing hydrogen cyanide from ethanedinitrile by contacting hydrogen cyanide-containing ethanedinitrile with an organic reagent, characterized in that hydrogen cyanide enters into a covalent bond with the organic reagent, and that the organic reagent comprises one or more compounds of the general formula wherein X is an oxo group or an imino group; R 1 is an aryl group, a linear or branched alkyl group having 1 to 3 carbon atoms, hydrogen, a carboxy group, a carboxylate group or a formyl group, and R 2 is hydrogen, an aryl group or a linear or branched alkyl group having 1 to 3 carbon atoms, with the proviso that R 1 and R 2 are not both hydrogen; or R 1 together with R 2 and the carbon atom between them form a five- to seven- membered carbocyclic ring which may optionally contain one or more double bonds.