Verfahren zur Herstellung einer Lösung aus Rhodiumkomplexen und Verfahren zur Herstellung eines Aldehyds

摘要

A process for recovering rhodium, in which an aqueous solution having rhodium extracted into an aqueous phase from a waste catalyst liquid separated form a hydroformylation reaction step by oxidation treatment in the presence of a recovery accelerator such as a carboxylic acid, an amine, ammonia or an inorganic acid, is obtained, whereby recycling of rhodium represented by hydroformylation reaction/recovery of the catalyst/regeneration of the catalyst, is made possible, and a cumbersome step of preparing a complex catalyst from an inorganic salt or the like, or a step of preparing a soluble salt from a metal or oxide by combustion in water of the recovered catalyst, can be omitted.