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Citation: SHAN Cheng-Ji, ZHANG Cheng-Lin. Effect of Element Electronegativity in Supporters on the Selectivity of Supported Rare Earth Catalysts[J]. Chinese Journal of Applied Chemistry, ;2001, 18(6): 481-483. shu

Effect of Element Electronegativity in Supporters on the Selectivity of Supported Rare Earth Catalysts

1.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 2 August 2000
Available Online: 4 December 2000
Fund Project: 中国科学院院长基金资助项目(031596) (031596)

Supported rare earth catalysts were made from Nd(O-i-Pr)₃ and the halides, especially chlorides of the ⅠA and ⅡA groups, used as catalyst supporters, for studying the relationship between the composition of supporters and the selectivity of supported rare earth catalysts. It was found that the electronegativity of the ⅠA or ⅡA elements showed an obvious effect on the selectivity of the supported catalysts, i.e. the selectivity of the supported catalyst was increased with the increase in their electronegativity, as in the case of supported Ti-catalyst.This rule was also held as the supporters are magnesium halides.
- butadiene,
- stereospecific polymerization,
- supporter,
- rare earth,
- Ziegler-Natta catalyst,
- selectivity,
- electronegativity
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