abstract |
Crude butadiene-1,3 which is a B-B fraction is subjected to catalytic trimerization to produce cyclododecatriene-1,5,9 in the presence of a Ziegler-type catalyst comprising a Ti-compound, e.g., Ti (OPrCl)Cl3, an Al-compound, e.g., AlEt2Cl, and electrondonor compounds containing S and containing P, e.g., dimethyl sulfoxide and triphenyl phosphate. |