Polymerization of ethylene over zeolite-supported catalysts

“Bound but Not Gagged”Immobilizing Single-Site α-Olefin Polymerization Catalysts

“…It has been reported that the in situ generation of a methylaluminoxane via reaction of TMA with surface adsorbed H 2 O leads to a more effective and accessible activator for dialkylmetallocene species supported on MCM-41 and ZSM zeolites . In addition, Jacobs and co-workers' study of the co-oligomerization of ethylene and propylene with Et(Ind) 2 ZrMe 2 supported on the aforementioned MCM-41/MAO system revealed a clear pore size effect, with narrow pore sizes leading to increased molecular weights, an effect more pronounced at lower Al/Zr ratios …”

The role of alkoxysilanes in propylene polymerization catalysis. A study of model Ti(Oi‐C3H7)4‐Al(C2H5)2Cl/Mg(C4H9)2 catalyst system

“…The amount of consumed propylene was monitored by measuring the pressure decrease in the vessel. The propylene concentration in toluene solution was calculated using the Henry law: С Pr = К H Pr · P Pr = К H Pr ( P total − P tol ), where К H Pr is the Henry constant, 0.40 mol L −1 atm −1 , 23 P total is the total reaction pressure and P Pr and P tol are the partial pressures (atm) of propylene and toluene, respectively.…”

Ethylene polymerization and copolymerization reactions with Ti(OR)4 – Al2(C2H5)3Cl3/Mg(C4H9)2 catalyst

“…The ethylene concentration C E mon (mol L −1 ) in solution was calculated using the Henry law, С E = К H E ( P E – P tol ) where К H E (mol L –1 atm −1 ) is the Henry constant and P E and P tol are partial pressures of ethylene and toluene. The Henry constant for ethylene in toluene at 50 °C is 0.098 mol L –1 atm −1 19 . Catalyst productivity is presented in Table 1 as a polymer yield (kg mol Ti −1 ), and in Fig.…”