公开(公告)号：US20240317906A1

公开(公告)日：2024-09-26

申请号：US18575083

申请日：2022-06-28

申请人： VERSALIS S.P.A.

发明人： Alessandro CASALINI ,  Aldo LONGO ,  Emilj SONCIN ,  Nicola FIOROTTO

IPC分类号： C08F12/08

CPC分类号： C08F12/08

摘要： Continuous mass polymerisation process for the preparation of vinyl aromatic polymers includes:



continuously feeding at least one vinyl aromatic monomer and at least one radical initiator to a mixing device, obtaining a reaction mixture;
feeding the reaction mixture to a Continuous Stirred Tank Reactor (CSTR) and in liquid phase leaving the CSTR to at least one Plug Flow Reactor (PFR);
recycling, to the mixing device, a fraction of the reaction mixture in liquid phase leaving the at least one PFR, the fraction between 25% and 50% by mass with respect to total mass of reaction mixture in liquid phase leaving the at least one PFR;
feeding the remaining fraction of the reaction mixture in liquid phase leaving the at least one PFR, to a devolatilisation system; and
feeding the polymer leaving the devolatilisation system or additive system, to a granulation system and recovering the polymer.