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Apatitic Tricalcium Phosphate as Novel Smart Solids for Supported Aqueous Phase Catalysis (SAPC)
Author(s) -
Dessoudeix M.,
JáureguiHaza U. J.,
Heughebaert M.,
Wilhelm A. M.,
Delmas H.,
Lebugle A.,
Kalck Ph.
Publication year - 2002
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/1615-4169(200206)344:3/4<406::aid-adsc406>3.0.co;2-3
Subject(s) - tppts , chemistry , catalysis , apatite , aqueous solution , phosphate , yield (engineering) , hydroformylation , adsorption , aqueous two phase system , inorganic chemistry , nuclear chemistry , chemical engineering , rhodium , mineralogy , organic chemistry , materials science , engineering , metallurgy
Apatitic tricalcium phosphate was used as support for supported aqueous phase catalysis (SAPC) in the hydroformylation reaction of oct‐1‐ene, at 80 °C in toluene using a dinuclear rhodium complex bearing TPPTS as hydrophilic ligands. The reaction yield is maximum and constant when the hydration rate of the support is ranging from 20 to 35%, before starting to decrease dramatically. The support was examined initially and after catalytic runs by XRD, FTIR, 1 H and 31 P NMR, SEM and EDS. No change was observed when the hydration rate is less than 35%. Beyond 35%, some decomposition of the support into monetite and stoichiometric apatite occurred; the drop in the yield is essentially due to a loss of droplets of water from the support. The outstanding yield observed with the apatitic tricalcium phosphate, when compared to silica usually used in SAPC, was attributed to the orientation of the catalytic molecule arising from the adsorption of some of the TPPTS ligands onto the hydrophilic surface of apatite.