Water-soluble rhodium/phosphonate–phosphine catalysts for hydroformylation

Hydroformylation of alkyl alkenes catalyzed by rhodium supported on MCM-41: The effect of H3PW12O40 on the catalytic activity and recycling

“…Oxygen alkylation is expected. Rh(I) cation, exemplified by (Ph 3 P) 2 Rh(CO) + , may be stabilized in the solid state by the lattices provided by the negatively charged molecular metal oxide clusters [8].…”

“…The catalytic activity decreased significantly in the presence of the diphosphines although high levels of both chemo-and regioselectivity towards the chiral aldehyde were maintained [7]. Amphiphilic Rh/phosphonatephosphine catalysts were found widely superior to Rh/TPPTS in the two-phase hydroformylation of 1-octene [8]. The supported Co/SiO 2 and Co/C catalysts were studied in the hydroformylation of 1-hexene.…”

Rhodium(I) and rhodium(III)–heteropolyacids supported on MCM-41 for the catalytic hydroformylation of styrene derivatives

“…The tethered catalyst was prepared following the procedure reported by Augustine and coworkers [8]. Thirty three micromoles of HPA dissolved in 20 ml of ethanol and 500 mg of MCM-41, the solution was stirred at room temperature for 16 h, the resulting solid was filtered and washed with ethanol to removed HPA and finally dried at 100 8C for 6 h.…”

“…In the two-phase hydroformylation of propylene, some of the novel catalysts showed activities and regioselectivities similar to those of Rh/TPPTS. Amphiphilic Rh/phosphonate-phosphine catalysts were found widely superior to Rh/TPPTS in the hydroformylation of 1-octene [8]. A series of polyamides have been synthesized by low-temperature interfacial condensation of 2,5-and 2,6-pyridinedicarboxylic chlorides and aliphatic diamines H 2 N(CH 2 ) n NH 2 , where n = 2 and 6, and used as the model supports for immobilization of the Rh(I) complex catalyst.…”

A Study of the Separation of 1-Dodecene and 1-Tetradecene Hydroformylation Products in Aqueous Medium

“…Adsorption equilibrium is then achieved rather quickly and the system shows high abilities to solubilize olefins. An O=W microemulsion produced in the hydroformylation process, will separate spontaneously at high conversions of olefins into aldehydes to an organic phase containing the reaction product, and an aqueous phase containing the catalyst (15)(16)(17)(18)(19)(20)(21)(22)(23)(24). A microemulsion was formulated for a system of hydroformylation containing hydrocarbons of heptanal, water, sodium dodecylsulfate (SDS), and butanol in the presence or absence of sodium tri(m-sulfophenyl)phosphine (TPPTS-Na).…”