Aqueous biphasic olefin hydroformylation catalyzed by water-soluble rhodium complexes

摘要

Catalysis with water-soluble rhodium complexes, RhCl(CO)(TPPMS)2, [TPPMS = P(C6H5)2(C6H4SO3)] (1),RhCl(CO)(TPPDS)2, [TPPDS = P(C6H5)(C6H4SO3)2] (2) and RhCl(CO)(TPPTS)2, [TPPTS = P(C6H4SO3)3] (3)in hydroformylation of 1-hexene, 2-pentene, 2,3-dimethyl-1-butene, cyclohexene and several mixtures of these olefinshave been studied, under moderate reaction conditions (T: 50–150 C; pCO/pH2 = 1; total p: 14–68 bar; Substrate/Catalyst: 600/1) in biphasic toluene/water media. The catalytic system shows high activity but low selectivity. Thelinear and branched oxygenated products obtained are equally useful in naphtha upgrading, as observed in the realEl Palito naphtha tried. The catalysts can be recycled several times without significant activity loss.