| 摘要 |
<p>The present invention relates to a process for the preparation of tetracyclododecenes, which can be a raw material of cycloolefin (co)polymers possessing excellent characters concerning their optical property, high transparency, heat resistance, and oil absorbency, from an inexpensive raw material of crude DCPD in a stable, continuous, and longstanding process. In the continuous preparation of tetracyclododecenes described in the present invention, it is possible to produce the targeted product in high efficiencies in the effective utilization of the raw materials exemplified by the separation and recovery of 2-norbornenes after the reaction. It is also possible to maintain a stable, continuous, and longstanding operation based on the suppression of ill effects deriving from the accumulation of byproducts such as 2-methyl-2-norbornenes, which easily creep into the circulating 2-norbornenes, by removing at least a part of said products from the reaction system. <IMAGE></p> |
