Allied Corporation

Andrew Szalkiewicz

Frank Mares

Steven E Diamond

A dinitrile is hydrogenated to an omega-aminonitrile with hydrogen in an aprotic solvent with a supported rhodium catalyst and ammonia present. The catalyst is prepared by hydrolyzing a rhodium (III) halide with strong aqueous base at elevated temperatures, drying the supported rhodium hydroxide at elevated temperatures and hydrogenating the dried product at elevated temperatures. High conversions, selectivity to aminonitrile and catalyst recyclability are achieved.

Selective hydrogenation of dinitrile to omega-aminonitrile and supported

A dinitrile is reacted with hydrogen in the presence of a solvent and a catalyst to form an omega-aminonitrile such as epsilon-aminocapronitrile at high selectivity. The catalyst is a rhodium complex of the formula (RR'Rh)A reacted with a strong base such as sodium hydroxide. R is derived from a diene such as 1,5-hexadiene. R' is a heterocyclic containing an aromatic ring nitrogen. A is a complex monovalent anion such as hexafluorophosphate.

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Andrew Szalkiewicz