The hydroformylation of long-chain olefins catalyzed by the water soluble rhodium complex, RhCl (CO) (TPPTS) 2, were studied in aqueous/organic biphasic system containing cationic surfactants. The addition of TPPDS as a modifier dramatically increased the regioselectivity of olefin hydroformylation. A synergistic effect of TPPTS and TPPDS on the regioselectivity was observed. The ratio of linear/branched aldehyde rose from 6.5 (without TPPDS) to 22.3 ([TPPTS]/[TPPDS]=2:1). The steric structure of hydrophilic group in the cationic surfactants exhibited an important influence on the regioselectivity. The hydrophilic group with a small steric volume was favorable for the formation of linear aldehyde. It was found that when the alkyl chain length of the higher olefin and that of the cationic surfactant were comparable (matching size), the regioselectivity for linear aldehyde was outstandingly high.

1-Dodecene hydroformylation catalyzed by water-soluble rhodium complex, RhCl (CO) (TPPTS) [TPPTS: P (m-C6 H4 SO3 Na)3], in the presence of surfactants and alcoholic solvents was studied. The results indicated that the hydroformylation in biphasic catalytic system occurred in the interface of aqueousrorganic phases. The formation of micelle was not only favorable for the reaction acceleration, but also favorable for the increase of linear aldehyde ratio in products. The key factor of the enhancement of reaction rate was the richness of rhodium catalyst in the interlayer with the static electricity attraction between active rhodium anion species and cationic end of surfactant.

1-Dodecene hydroformylation catayzed by water soluble rhodium complex [RhCI (CO) (TPPTS) 2] Was studied in the presence of TPPIS [P (m-C6 H4 SO3 Na)3] and CIAB (eetyl-trimethyl ammonium), The influence of reaction parameters was discussed in detail based on micelle effect in biphasic sys-tem. The modification for the microcircunstance of micelle interface Was conducted by the introduction of a catalyst pro-moter TPPDS [PhP (m-C6 H6 SO3 Na) 2] into the reaction solu-tion. A synergistic effect between TPPDS and TPPTS on the regioselectivity of 1-dodecene hydroformylation was observed. The selectivity of linear aldehyde in the products was SO high as 95.7% at the molar ratio of [TPPDS]/[TPPTS]=O.5.