Process for preparing diels-alder addition product from conjugated diolefin and acrylonitrile

摘要

In preparing a Diels-Alder addition product of a conjugated diolefin and acrylonitrile by means of reacting the conjugated diolefin and acrylonitrile, a vessel type reactor (3) is used. The pressure in a gaseous phase presented therein is increased by using an inert gas to the reaction and a premixed solution (1) of the conjugated diolefin or a compound which produces the conjugated diolefin in the reactor and acrylonitrile is released through an upper portion of the reactor (3) into the gaseous phase and dropped into a liquid phase (4) to react. A reaction product is taken out through a lower portion of the reactor (3). The continuous preparation can be made in a safe manner for a long time without any adhesion of an insoluble polymer to the reactor or to the pipe nor sudden fluctuation of the pressure.