Selective catalyst recovery
Abstract
Abstract A METHOD FOR THE RECOVERY OF COMPLEXES OF GROUP VIII NOBLE METALS AND BIPHYLLIC LIGANDS FROM HYDROCARBONS OR HIGH BOILING RESIDUES FORMED IN HYDROCARBONYLATION OF OLEFINS. THE GROUP VIII NOBLE METAL IS RECOVERED IN ACCORDANCE BY REDUCTION OF THE HIGH BOILING FRACTION OF A HYDROGORMYLATION REACTION MEDIUM TO CONVERT THE ALDEHYDE GROUPS THERETO TO ALCOHOLS. THIS REDUCTION IS EFFECTED BY TREATMENT WITH CONVENTIONAL MEANS E. G., HYDROGENATION IN THE PRESENCE OF HETEROGENEOUS HYDROGENATION CATALYSTS AT A TEMPERATURE FROM ABOUT 25* TO 325*C. OR BY NUCLEOPHILIC ATTACK BY HYDRIDE ION BY TREATMENT AT MIND CONDITIONS WITH AN ALKALI METAL ALUMINUM HYDRIDE OR BOROHYDRIDE. THE METAL COMPLEX IS ESSENTIALLY INSOLUBLE IN THE RESULTING ALCOHOL TAR AND THE CATALYST PRECIPITATE IS RECOVERED BY CONVENTIONAL SOLID-LIQUID SEPARATION TECHNIQUES, E.G., FILTRATION OR CENTRIFUGATION.
Inventors
- 👤 Frank B Booth
Bibliographic Details
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