Patent ID: 7495133

Claim:
A process for hydroformylating olefins, comprising: reacting a monoolefin or a monoolefin mixture having from 2 to 25 carbon atoms with a mixture of carbon monoxide and hydrogen in the presence of a heteroacylphosphite of general formula (1) or a corresponding complex with one or more metals of groups 4 to 10 of the Periodic Table of the Elements wherein R 1 , R 2 , R 3 , R 4 and q are the same or different and are each a substituted or unsubstituted aliphatic, alicyclic, aromatic, heteroaromatic, mixed aliphatic-alicyclic, mixed aliphatic-aromatic, heterocyclic, mixed aliphatic-heterocyclic hydrocarbon radical having from 1 to 70 carbon atoms, H, F, Cl, Br, I, —CF 3 , —CH 2 (CF 2 ) j CF 3 wherein j=0-9, —OR 5 , —COR 5 , —CO 2 R 5 , —CO 2 M, —SiR 5 3 , —SR 5 , —SO 2 R 5 , —SOR 5 , —SO 3 R 5 , —SO 3 M, —SO 2 NR 5 R 6 , —NR 5 R 6 , —N═CR 5 R 6 , wherein R 5 and R 6 are the same or different and are each as defined for R 1 , and M is an alkali metal, an alkaline earth metal ion which is present in the formula as one half, an ammonium or phosphonium ion, x, y, z are each independently O, NR 7 , S, where R 7 is as defined for q, and x, y, z are not simultaneously O, with the proviso that when q is a radical which has a structural formula (6c) wherein the R 1 to R 4 radicals are each as defined for formula (1), x 1 , y 1 , z 1 are each independently O, NR 7 , S, where R 7 is as defined for q, T is an oxygen or an NR 30 radical, wherein R 30 is as defined for q, and the a position serves as the attachment point, x and x 1 must not simultaneously be N, and x must not be N when T is NR 30 .