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化学学报
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化学学报 ›› 1998, Vol. 56 ›› Issue (12): 1159-1164. 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Ⅱ: 催化剂组分的 电导率和紫外光谱

夏少武;魏庆莉;李宁;张书圣   

  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 systemⅡ: The electric conductivity and UV-Vis spectrum of the catalyst

Xia Shaowu;Wei Qingli;Li Ning;Zhang Shusheng   

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

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在加氢汽油介质中Ni(naph)~2-Al(i-Bu)~3-(BF~3·OEt~2+n-C~8H~1~7OH)体系为胶体催化剂的基础上,本文从电导率、UV-Vis光谱对催化剂各组分之间的相互作用作进一步的分析。得出催化剂组分以离子对的形式参与反应;Ni^0在Ni(naph)~2-Al(i-Bu)~3陈化液中以团簇粒子形式存在,因吸附Ni^+naph^-而稳定,因加入BF~3·OEt~2而失去稳定性、聚结为胶粒,活性中心位于胶粒表面的观点。

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

Using electric conductivity and UV-Vis spectroscopy, the interaction between the catalyst components was further analyzed. The conclusions as follows were further verified: the catalyst components reacted with each other in the form of ionic pair. There existed Ni(0)-atom cluster (Ni^0)~m in aged solution of (Ni)-(Al). The cluster was very stable because of absorption of Ninaph and became bigger to form colloidal particles while adding (B). The active centers were located on the surface of colloidal particles. Butadiene didn't take part in the formation of active centers.

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

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