Patent ID: 7317130

Claim:
A process comprising hydroformylating an olefinically unsaturated compound having from 3 to 24 carbon atoms in the presence of at least one metal of groups 8 to 10 of the Periodic Table of the Elements as catalyst, wherein the hydroformylation is carried out in the presence of at least 0.1 mol %, based on the olefinically unsaturated compound, of at least one cyclic carbonic ester of the formula I where R 1 , R 2 , R 3 , R 4 are identical or different and are each H or a substituted or unsubstituted aliphatic, alicyclic, aromatic, aliphatic-alicyclic, aliphatic-aromatic or alicyclic-aromatic hydrocarbon radical having from 1 to 27 carbon atoms, n is 0-5 X is a divalent substituted or unsubstituted, aliphatic, alicyclic, aromatic, aliphatic-alicyclic or aliphatic-aromatic hydrocarbon radical having from 1 to 27 carbon atoms, and at least one ligand which contains no sulfonic acid group or sulfonate group, wherein the cyclic carbonic ester component is present in solvent amounts for the catalyst.