Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus containing
Patent
1982-04-29
1985-03-05
Sneed, Helen M. S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus containing
260429R, 568454, C07F 950
Patent
active
045032556
ABSTRACT:
A process for recovering re-usable triarylphosphine (e.g. triphenylphosphine) from rhodium catalyst residues poisoned by the presence of alkyldiarylphosphine (e.g. n-propyldiphenylphosphine) such as are obtained as spent catalyst residues from the hydroformylation of olefins. The process comprises subjecting the poisoned residues to evaporative separation under reduced pressure to separate a vapor comprising triarylphosphine from the rhodium and then mixing the condensed vapor with polar solvent and obtaining the triarylphosphine as a crystalline precipitate from the solvent. The crystalline phosphine is sufficiently free of poisons to be re-usable as a catalyst component in a hydroformylation process.
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Booker David F.
Cotterill Phillip J.
Grove David E.
Tyson Robert G.
Johnson Matthey Public Limited Company
Sneed Helen M. S.
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