Technology Unit

A vacuum is applied through a port in the upper part of the devolatilizer chamber where again a vapor phase is drawn off for purification, condensed and then pumped to a purification tower (50). A heavy fraction of toluene used as catalyst solvent and diene such as ethylene norbornadiene (ENB) comonomer or 1-octene comonomer are recovered by this purification tower (50). The ENB or octene may be recycled through outlet (54). Alternative heavy comonomers, such as ENB and octene, may thereby be stored in separate storage vessels (55), (56).