PROCESS FOR PREPARING 5-ETHYLENE-2-NORBORNENE WITH HIGH QUALITY

摘要

PURPOSE:To obtain the titled substance, by isomerizing 5-vinyl-2-norbornene having a suppressed 4-vinylcyclohexene content in the presence of a solid base catalyst prepared from an alumina, an alkali metallic hydroxide and an alkali metal. CONSTITUTION:In obtaining the titled substance by isomerizing 5-vinyl-2- norbornene, 5-vinyl-2-norbornene having a 4-vinylcyclohexene content suppressed to 1ppm-0.5wt% (preferably 5ppm-0.1wt%) is isomerized in the presence of a specific solid base catalyst. The solid base catalyst is prepared from an alumina (preferably gamma-alumina having 100-300 meshes), an alkali metallic hydroxide (e.g., NaOH) and an alkali metal (e.g., Na) in an inert gas atmosphere at 200-500 deg.C. EFFECT:The aimed high-purity substance is obtained only by separating the catalyst after the reaction is over. USE:A third component for EPDM.