Methathesis of ethylene-butene mixtures to propylene with rhenium on alumina catalysts

Direct Transformation of Ethylene into Propylene Catalyzed by a Tungsten Hydride Supported on Alumina: Trifunctional Single‐Site Catalysis

“…[17] We have also observed this reaction, with a short lifetime, during Fischer-Tropsch synthesis in the presence of small iron nanoclusters formed by the thermal decomposition of [HFe 3 (CO) 11 ] À /MgO. [18] This reaction has also been reported to proceed with catalysts based on europium or ytterbium deposited on coal in combination with titanium compounds (TiCl 4 , Ti(OiPr) 4 ) [19] as well as with MO x / SiO 2 [20] or Ru/SiO 2 catalysts. [21] However, the catalytic performances of all these systems were either not quantified [17] or proved to be very low [19][20][21] compared to the present W(H) 3 / Al 2 O 3 system.…”

“…[1,2] Only 2-3 % of global propylene production comes from dehydrogenation of propane or Fischer-Tropsch synthesis. The cross-metathesis reaction between ethylene and 2-butenes [3][4][5] is an alternative route to propylene that is currently undergoing significant industrial development, [2] although it first requires the dimerization of ethylene into 2-butenes. Herein we report a new and efficient catalytic reaction that transforms ethylene directly into propylene with a selectivity higher than 95 % [Eq.…”

Self-Metathesis of 1-Octene Using Alumina-Supported Re2O7 in Supercritical CO2

“…Catalysts Re-A 1 , Re-A 2 , Re-A 3 , Re-A 4 and Re-S were prepared by a wet-impregnation technique described in the literature [23,24]. A 25-mL round bottomed flask was charged with an aqueous solution (1.7 9 10 -1 M, 12 mL) of NH 4 ReO 4 (555 mg, 2.1 mmol) and with the chosen support (c-Al 2 O 3 or silica; 5 g).…”

Industrial Applications of the Olefin Metathesis Reaction

“…It is the same reaction than in the Triolefin process developped by Phillips and concerns the synthesis of propene from ethylene and butene [29]. This process was proposed in order to valorize the C4 fraction of steam-cracking after extraction or semi-hydrogenation of the butadiene and transformation of the isobutene into polyisobutene or MTBE.…”