In an amine or nitrile embedded passivated hydrogenation catalyst

A passivated hydrogenation catalyst that is embedded in at least one embedding agent selected from the group consisting of:

• primary amines, represented by the formula R—CH2—NH2 (I), wherein R is selected from the group consisting of linear or branched, substituted or unsubstituted, saturated or unsaturated, optionally O-containing and optionally N-containing, preferably optionally only N-containing, moieties containing 7 to 30 carbon atoms,
• derivatives of said primary amines, represented by the formula R—CH2—NR′R″ (II), wherein R is as defined above and R′ and R″ are independently selected from hydrogen and the group consisting of linear or branched, substituted or unsubstituted, saturated or unsaturated, optionally O-containing and optionally N-containing, preferably optionally only N-containing, moieties containing 3 to 30 carbon atoms, preferably 4 to 30 carbon atoms, more preferably 5 to 30 carbon atoms, most preferably 6 to 30 carbon atoms, with the proviso that at most one of R′ and R″ is hydrogen,
• nitrites, represented by the formula R—C≡N (III), wherein R is selected from the group consisting of linear or branched, substituted or unsubstituted, saturated or unsaturated, optionally O-containing and optionally N-containing, preferably optionally only N-containing, moieties containing 5 to 30 carbon atoms, preferably 6 to 30 carbon atoms, more preferably 7 to 30 carbon atoms, most preferably 8 to 30 carbon atoms,
• ether amines,
• ether diamines, and
• mixtures of any of said primary amines, derivatives thereof, nitrites, ether amines, and ether diamines.