1[1]Magna,Lionel.Hydroformylation process employing a cobalt-based catalyst in a non-aqueous liquid with improved catalyst recycling:US,7223374[P].
2[2]Ahlers,Wolfgang.Ligands for pnicogen chelate complexes with a metal of subgroup Ⅷ and use of the complexes as catalysts for hydroformylation,carbonylation,hydrocyanation or hydrogenation:US,7173138[P].