Journal
APPLIED CATALYSIS A-GENERAL
Volume 239, Issue 1-2, Pages 79-86Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-860X(02)00377-0
Keywords
non-porous fumed silicas; supported aqueous-phase Rh catalyst; SAPC; hydroformylation; 1-hexene; P-31 NMR
Categories
Ask authors/readers for more resources
Non-porous fumed-silica nanoparticles were used as supports for the first time to immobilize water-soluble complex HRh(CO)(P(M-C6H4SO3Na)(3) (1) [P(M-C6H4SO3Na)(3), i.e. trisodium salt of tri-(m-sulfophenyl)-phosphine, TPPTS] to obtain supported aqueous-phase catalysts (SAPC) (fumed-SiO2-SAPC) for hydroformylation of 1-hexene. The experimental results proved that the structure of support and the support hydration were the determining factors contributing to the hydroformylation performance. The fumed-SiO2-SAPC where the water-soluble rhodium complexes were well dispersed onto the external surface of the silica nanoparticles presented a higher hydroformylation performance over a relatively wider range of support hydration as compared to the SAPC with conventional porous granular-SiO2 support (porous SiO2-SAPC). A positive effect on the reaction performance was observed from the particle size and surface area of the fumed-silica nanoparticles. The hydroformylation performance with fumed-SiO2-SAPC was promoted by an addition of basic alkali metal salts such as Na2CO3, K2CO3, and NaH2PO4, which depressed the oxidation of ligand TPPTS to OTPPTS [OTPPTS, i.e. trisodium salt of tri-(m-sulfophenyl)-phosphine oxide, OP(M-C6H4SO3Na)(3)] as evidenced by P-31 NMR observation. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available