文摘
The self-metathesis of methyl oleate (MO) to yield 9-octadecene and 9-octadecene-1,18-dioate (9-OD) was studied in liquid-phase on silica-supported Hoveyda-Grubbs complex catalysts (HG/SiO2) containing 0.43-6.0 wt. % HG. The reaction was carried out in a batch reactor at 303-343 K and 101.3 kPa, using cyclohexane as solvent. HG/SiO2 catalysts were active and highly selective for the MO metathesis reaction; equilibrium values of MO conversion and 9-OD yield were reached in 80 min. No catalyst leaching took place in cyclohexane. Catalysts containing HG > 0.87 wt. % showed no significant deactivation after two consecutive catalytic tests.