Język Polski
English
Data publikacji
: 2022-09-21
Polimeryzacja etylenu w obecności wodoru na katalizatorach wanadowo-magnezowych na nośnikach
Abstrakt
Catalyst activity was studied in a slurry polymerization of ethylene carried out over supported VCl4/MgCl2 and VOCl3/MgCl2 cata-lysts in relation to hydrogen concentration (0–40 mmols/L, i.e., 0–2 bar) and to Al(i-Bu)3 and Al(i-Bu)2H, each used as cocatalyst. Hydrogen was found to reduce the activity of the catalyst by 2 to 6 times. The deactivation occurring in the presence of hydrogen was directly related to hydrogen pressure and found to be due to the hydride species of organoaluminum com-pounds forming in the side reaction of AlR3 with the V-H bonds accompanied by adsorption of alkylaluminum hydride on active sites. A sequence of reactions is suggested (eqns. 2-5) to explain the deactivation and reactivation of the catalyst.
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Zasady cytowania
Mikenas, T. B., Zakharov, V. A., Echevskaya, L. G., & Matsko, M. A. (2022). Polimeryzacja etylenu w obecności wodoru na katalizatorach wanadowo-magnezowych na nośnikach. Polimery, 45(5), 349–352. https://doi.org/10.14314/polimery.2000.349
