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Olefin polymerization with titanium tetrachloride catalysts supported on surface-modified silica

✍ Scribed by Dong-ho Lee; Keun-byoung Yoon; Kyung-seok Kang

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
223 KB
Volume
16
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

After modification of silica with benzoyl chloride (BC) to obtain BC‐modified SiO~2~ (BC‐SiO~2~), BC‐SiO~2~/TiCl~4~ and BC‐SiO~2~/BEM/TiCl~4~ catalysts were prepared by treating the BC‐SiO~2~ with TiCl~4~ directly or with butylethylmagnesium (BEM) followed by TiCl~4~, respectively. During the modification, BC reacts with hydroxyl groups of silica. In this way the corresponding ester is anchored on the silica surface and the CO group is coordinated with Ti and/or Mg. In addition, BEM is converted to MgCl~2~ in the reaction with TiCl~4~. These catalysts have reasonable activities for ethylene or propene polymerization.

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