Patent ID: 7777068

Claim:
A process for preparing mixtures of monoolefinic C 5 -mononitriles having nonconjugated C═C and C═N bonds by hydrocyanation of a 1,3-butadiene-containing hydrocarbon mixture in the presence of a catalyst comprising at least one system comprising a) Ni(0) b) from 4 to 10 mol per mol of Ni(0) in a) of a compound (I) of the formula P(X 1 R 1 )(X 2 R 2 )(X 3 R 3 ) (I) where X 1 , X 2 , X 3 are each, independently of one another, oxygen or a single bond, R 1 , R 2 , R 3 are each, independently of one another, alkl radicals having from 1 to 10 carbon atoms, aryl groups or hydrocarbyl groups having from 1 to 20 carbon atoms; and c) from 1 to 4 mol per mol of Ni(0) in a) of a compound (II) of the formula where X 11 , X 12 , X 13 , X 21 , X 22 , X 23 are each, independently of one another, oxygen or a single bond, R 11 , R 12 are identical or different, individual or bridged, optionally substituted aryl radicals having from 6 to 10 carbon aroms, R 21 , R 22 are identical or different, individual or bridged, optionally substituted aryl radicals having from 6 to 10 carbon aroms, and Y is a bridging, optionally substituted aryl group having from 6 to 20 carbon atoms in the aromatic system.