Supported complex catalysts for vapor-phase carbonylations
Conference
·
OSTI ID:370718
- Institute for Applied Chemistry Berlin-Adlershof (Germany); and others
Supported mixed bidentate rhodium and iridium complexes derived from phosphonate-phosphanes have been studied in methanol carbonylation and in ethylene hydroformylation. The complexes showed higher activities than bis-phosphane complexes in homogeneous and vapor-phase methanol carbonylation. Hemilabile behavior of the mixed bidentate complexes may explain these findings. In contrast to strongly chelating ligands, phosphonate-phosphane ligands improved the selectivity of supported rhodium complexes in ethylene hydroformylation. Mixed zirconium phosphonate structures containing phosphane groups afforded excellent heterogeneous rhodium complex catalysts. The zirconium phosphonate-phosphane-rhodium catalysts were several times more active than rhodium on silica or rhodium on activated carbon, showed a superior stability, and produced butyraldehydes with up to 96% selectivity in the vapor-phase hydroformylation of propylene.
- OSTI ID:
- 370718
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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