Selectivity of Rhodium-catalyzed Hydroformylation of 1-Octence in a Thermorphic Solvent System

The use of temperature dependent multicomponent solvent (TMS) process, in which the catalyst
remains as a residue in one of the liquid phases a¡rd the product goes prelerably to the other liquicl phase. cart
be an enabling strategy of com¡nercial application of hyclrolormylatiorr processes with hi¡¡h selectivity,
efficiency and ease of product separation and catalyst recovery. This papel descril¡es the isonrer distl'ibution
of the formation of n-nonanal and 2-methyloctanal t'or the rhocliun-catalyzed honrogcneous tryclrolonnylatiotr
of l-octene using HRh(COXP(OPh)r]r catalyst in1'MS-systern consisting ol ¡l't-rpylerte carbonate (PC).
dodecane a¡rd 1,4-dioxane. Effects of the concenb'ation of l-<¡ctene ancl catalyst. tenìperatru'e, composition ol
s¡,ngas (HrlCO), total pressure ol syng,as and hgancl to catalyst [P(OPh)r/HRh(COXPPhs)rl ratio on t.he
selectivity of the nonylaldehyde products (rViso latio) have been ¡neasru'ecl. I-lighest selectivit¡, tbr n-u<¡tranal
with average catalyst acrivity is observed at tenìperature oi.163 K, equirnolar ol COû1r, total syngas Pressue
of I .5 lvfPa and ligand/catalyst ratio of I 2 ùr TMS composition of'0. I /0.3i0.6. 'l'his stucly is practically usefìrl f'or
the optimization of n-nonanal production by hydroformylation ol I -octene.