PROCESS FOR RECOVERING RHODIUM FROM OXO SYNTHESIS REACTION PRODUCTS

• Main Authors: BACH, HANSWILHELM, CORNILS, BOY, KONKOL, WERNER, WIEBUS, ERNST, BAHRMANN, HELMUT
• Format: Patent
• Language: English; German
• Published: 08.08.1990
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; FERROUS OR NON-FERROUS ALLOYS; GENERAL METHODS OF ORGANIC CHEMISTRY; INORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

1. A process for separating and recovering rhodium used as a catalyst without a complexing agent by extraction from an organic solution of the products of the Oxo synthesis with an aqueous solution of organic phosphines having the general formula see diagramm : EP0156253,P10,F2 as complexing reagents, where Ar**1 , Ar**2 and Ar**3 each denote a phenyl or naphthyl group, Y**1 , Y**2 and Y**3 each stand for a straight-chain or branched alkyl group having 1 to 4 carbon atoms, an alkoxy group, a halogen atom, the OH, CN, NO2 - or R**1 R**2 N group, R**1 and R**2 each standing for a straight-chain or branched alkyl group having 1 to 4 carbon atoms, X**1 , X**2 and X**3 are each a sulfonate (SO3 **- ) and/or a carboxylate (COO**- ) radical, m1 , m2 and m3 are the same or different integers from 1 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 integers from 0 to 5 and alkali metal, alkaline earth metal, zinc, ammonium or quaternary ammonium ions of the general formula N(R**3 R**4 R**5 R**6 )**+ , R**3 , R**4 , R**5 , R**6 each denoting a straight-chain or branched alkyl group having 1 to 4 carbon atoms are contained in the sulfonates and carboxylates, characterised in that a solubiliser is added to the aqueous solution of the complexing agent.