Manufacturing method null of Takasina rank 5 ethylidene 2
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机译：高须等级5亚乙基2的制造方法无效
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摘要
PURPOSE:To obtain the titled compound, by isomerizing 5-vinyl-2norbornene containing restricted amount of 4-vinylcyclohexene using a solid basic catalyst prepared by heating hydrated alumina and a specific amount of an alkali metal in an inert gas. CONSTITUTION:A high-quality 5-ethylidene-2-norbornene can be produced by isomerizing 5-vinyl-2-norbornene containing 1ppm-0.5wt%, practically 5ppm-0.1 wt% 4-vinylcyclohexene in the presence of a solid basic catalyst prepared by heating hydrated alumina and an alkali metal (e.g. Na, K, etc.) in an inert gas atmosphere (e.g. N2, He, etc.) at 180-500 deg.C, especially 200-330 deg.C. The amount of the alkali metal is =1 equivalent, preferably 1.01-2 equivalent based on the molar amount of water in the hydrated alumina. USE:A third component of EPDM.
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