Method for the partial hydrogenation of conjugated dienes

摘要

A method for the partial hydrogenation of conjugated dienes, characterized in that a chain conjugated diene in which the conjugated two double bonds have different numbers of substituents, is hydrogenated at a temperature of not higher than 50 DEG C. in the presence of a catalyst composed essentially of (1) a cobalt compound, (2) an organophosphine compound and (3) an aluminum compound, to obtain a partially hydrogenated product wherein as between said conjugated two double bonds, the one having a greater number of substituents is selectively hydrogenated.