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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

Studies on the Polymerization of Butadiene Catalyzed by Colloidal Nickel System II. The Electric Conductivity and UV - Vis Spectrum of the Catalyst

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【作者】 夏少武魏庆莉李宁张书圣

【Author】 XIA Shao - Wu WEI Qing - Li LI Ning ZHANG Shu - Sheng(Department of Applied Chemistry, Qingdao Institute of Chemical Technology, Qingdao, 266042)

【机构】 青岛化工学院应用化学系青岛化工学院应用化学系 青岛266042青岛266042青岛266042

【摘要】 在加氢汽油介质中Ni(naph)2—Al(i-Bu)3—(BF3·OEt2+n-C8H17OH)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;Ni0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BF3·OEt2而失去稳定性、聚结为胶粒,活性中心位于胶粒表面的观点.

【Abstract】 Using electric conductivity and UV - Vis spectioscopy, 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 (Ni0)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.

【基金】 国家自然科学基金资助课题(29373106)
  • 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,1998年12期
  • 【分类号】O643.3
  • 【被引频次】3
  • 【下载频次】75
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