Process for the preparation and the recovery of rhodium from oxosynthesis products.

摘要

1. A process for separating and recovering rhodium from the products of the oxo synthesis containing no complex-forming agents with the aid of complex-forming reagents characterised in that sulfonates and carboxylates of organic phosphines with the general formula see diagramm : EP0147824,P7,F1 are used in the form of a solution immiscible with the oxo raw product as complex-forming reagents, where Ar**1, Ar**2 and Ar**3 are each a phenyl or naphthyl group, Y**1, Y**2 and Y**3 each denote a straight-chain or branched alkyl group with 1 to 4 carbon atoms, an alkoxy group, a halogen atom, the OH, CN, NO2 or R**1 R**2 N group where R**1 and R**2 each stand for a straight-chain or branched alkyl group with 1 to 4 carbon atoms, X**1, X**2 and X**3 are each a sulfonate -/SO**3-) and/or a carboxylate-(COO**-) group, m1 , m2 and m3 are the same or different whole numbers from 0 to 3 and at least one number m1 , m2 or m3 is equal to or greater than 1, n1 , n2 and n3 are the same or different whole numbers from 0 to 5 and alkali metal, alkaline earth metal, zinc, ammonium or quaternary ammonium ions with the general formula N(R**3 R**4 R**5 R**6) where R**3, R**4, R**5 and R**6 each stand for a straight-chain or branched alkyl group with 1 to 4 carbon atoms are contained in the sulfonates and carboxylates.