IR diffuse-reflectance spectroscopic study of benzonitrile, CO, and NO interaction with vanadium-magnesium catalysts for ethylene polymerization

Authors
Mats'ko, MA Paukshtis, EA Mikenas, TB Sobolev, AP Zakharov, VA
Citation
Ma. Mats'Ko et al., IR diffuse-reflectance spectroscopic study of benzonitrile, CO, and NO interaction with vanadium-magnesium catalysts for ethylene polymerization, KINET CATAL, 40(4), 1999, pp. 547-551
Citations number
30
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
KINETICS AND CATALYSIS
ISSN journal
00231584 → ACNP
Volume
40
Issue
4
Year of publication
1999
Pages
547 - 551
Database
ISI
SICI code
0023-1584(199907/08)40:4<547:IDSSOB>2.0.ZU;2-B
Abstract
The adsorption of benzonitrile, CO, and NO on vanadium-magnesium catalysts (VMC) of ethylene polymerization was studied by IR diffuse-reflectance spec troscopy. It was shown that carbon oxide and benzonitrile interact with bot h the Lewis acid sites of magnesium chloride and the coordinatively unsatur ated V4+ ions in VMC, and the absorption bands of magnesium chloride overla p with the absorption bands of VMC. The complexes of CO and benzonitrile wi th V5+ ions were not found in the VOCl3/MgCl2 system. The coordinatively un saturated V4+ ions in VMC can be identified using NO as a probe molecule (t he absorption bands at 1776, 1840, and 1920 cm(-1)). NO does not interact w ith magnesium chloride used as a support in this system.