| abstract |
Procedure for the separation by extraction of homogeneous dissolved catalysts, from a discharge of the reaction of a hydrocyanuration of unsaturated mononitriles to give dinitriles, by extraction with the aid of a hydrocarbon K, characterized in that a) the discharge of evaporation is concentrated the reaction as a previous step to step b) by distillation at pressures between 0.1 and 5,000 mbar and at temperatures between 10 and 150 ° C, b) a hydrocarbon K is provided to the discharge of the reaction, concentrated by evaporation, thereby that a current I is obtained, and c) the current I is fed, without prior separation of the liquid phases, in an extraction device and extracted at a temperature T with the hydrocarbon K, obtaining a current II containing the enriched hydrocarbon K with the catalyst, and a stream III poor in catalyst. |