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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (12): 1165-1171. 上一篇    下一篇

研究论文

镍系胶体催化丁二烯聚合反应的研究Ⅲ: 催化剂组分的 红外光谱

夏少武;魏庆莉;张书圣;杨泽福   

  1. 青岛化工学院应用化学系.青岛(266042)
  • 发布日期:1998-12-15

Studies on the polymerization of butadiene catalyzed by colloidal nickel systemⅢ: The IR spectrum of catalyst

Xia Shaowu;Wei Qingli;Zhang Shusheng;Yang Zefu   

  1. Qindao Inst Chem Technol, Dept Appl Chem.Qingdao(266042)
  • Published:1998-12-15

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已知在加氢汽油介质中Ni(naph)~2-Al(i-Bu)~3-(BF~3·OEt~2+n-C~8H~1~7OH)体系为胶体催化剂。本文应用FT-IR谱结合Tyndall效应,电导率,UV-Vis,ESR谱对催化剂各组分的相互作用进行研究。得出Ni(naph)~2被Al(i-Bu)~3还原的主要产物是Ni^0;被(i-Bu)~2AlO(i-Bu)还原的主要产物Ni^+(naph)^-,Ni^0聚结成胶粒(Ni^0)~n,胶粒表面的Ni^0或吸附的Ni^+是活性中心组分,与(i-Bu)~2AlBF~4形成配合物,给出了活性中心模型。丁二烯对形成活性中心无影响,仅起稳定胶粒的作用。

关键词: 胶体, 催化剂, 镍络合物, 铝络合物, 多组分体系, 红外分光光度法, 胶粒, 活性中心

Using IR spectrum, Tyndall effect, electric conductivity, UV-Vis and ESR spectra, the reaction mechanism of catalyst components as studied. The main reduced product of Ni(naph)~2 by Al(i-Bu)~3 was Ni^0. The main reduced product by (i-Bu)~2AlO(i-Bu) was Ninaph. Ni^0 aggregated as colloidal particles (Ni^0)~n, Ni^0 and Ni^+ located on the surface of colloidal particles are active center parts. They coordinate with (i-Bu)~2AlBF~4. Butadiene does not take part in the formation of active center.

Key words: COLLOID, CATALYST, NICKEL COMPLEX, ALUMINIUM COMPLEX, MULTICOMPONENT SYSTEM, INFRARED SPECTROPHOTOMETRY, MICELLAE (=MICELLE), ACTIVE CENTER

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