| 摘要 |
Process for the preparation of aldehydes by the hydroformylation of olefins having more than 7 carbon atoms, comprising the stage of hydroformylation by means of a rhodium catalyst dissolved in homogeneous reaction medium, the separation of the rhodium catalyst from the material discharged from the hydroformylation reaction and the recycling of the rhodium separated from the material discharged from the hydroformylation to the hydroformylation stage, in which the rhodium catalyst is extracted into the aqueous phase from the material discharged from the hydroformylation by means of an aqueous solution of a nitrogen-containing complexing agent from the group consisting of the optionally substituted pyridines, quinolines, 2,2'-bipyridines, 1,10-phenanthrolines, 2,2'-biquinolines, 2,2',6',2''-terpyridines and porphines which are sulphonated or carry sulphonated substituents, and/or from the group consisting of the carboxylated pyridines, the carboxylated quinolines, the optionally substituted 2,2'-bipyridines, 1,10-phenanthrolines, 2,2'-biquinolines, 2,2',6',2''-terpyridines and porphines which are carboxylated or carry carboxylated substituents, and the aqueous, rhodium-containing extract is recycled to the hydroformylation stage. |
