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Citation: Lin Qingsong, Wang Yu, He Ren. DYNAMIC ESR CHARACTERIZATION OF CATALYSTS ZrCl₄/AEt₂Cl and ZrCl₄/AEt₂Cl-n-C₄H₉ONa[J]. Chinese Journal of Applied Chemistry, ;1989, 6(6): 89-91. shu

DYNAMIC ESR CHARACTERIZATION OF CATALYSTS ZrCl₄/AEt₂Cl and ZrCl₄/AEt₂Cl-n-C₄H₉ONa

1.
Department of Chemistry, Dalian University of Technology

Received Date: 26 January 1989
Available Online: 15 July 1989

ESR spectra of zirconium in ZrCl₄/AlEt₂Cl and ZrCll₄/AlEt₂Cl-n-C₄H₉ONa catalyst systems were recorded at various reaction times, the g=1.978, Hpp=22.4×10⁴T. The spin concentrations were determined for two systems. It is shown that Zr⁴⁺ is first reduced to Zr³⁺,which is further reduced to lower state. The reduction rate of Zr⁴⁺ and Zr³⁺ in ZrCl₄/AlEt₂Cl-n-C₄H₉ONa system is lower than that in ZrCl₄/AlEt₂Cl system. This fact indicates that n-C₄H₉ONa plays an importent role in restraining reduction of Zr⁴⁺ and Zr³⁺.
- ESR,
- Zirconium,
- Oligomerization of ethylene,
- Catalysis
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DYNAMIC ESR CHARACTERIZATION OF CATALYSTS ZrCl4/AEt2Cl and ZrCl4/AEt2Cl-n-C4H9ONa

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DYNAMIC ESR CHARACTERIZATION OF CATALYSTS ZrCl₄/AEt₂Cl and ZrCl₄/AEt₂Cl-n-C₄H₉ONa