- 专利标题： PROCESS FOR THE PREPARATION OF VINYLAROMATIC POLYMERS
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申请号： US18575083申请日： 2022-06-28
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公开(公告)号： US20240317906A1公开(公告)日： 2024-09-26
- 发明人: Alessandro CASALINI , Aldo LONGO , Emilj SONCIN , Nicola FIOROTTO
- 申请人： VERSALIS S.P.A.
- 申请人地址： IT San Donato Milanese (MI)
- 专利权人： VERSALIS S.P.A.
- 当前专利权人： VERSALIS S.P.A.
- 当前专利权人地址： IT San Donato Milanese (MI)
- 优先权： IT 2021000017519 2021.07.02
- 国际申请： PCT/IB2022/055998 2022.06.28
- 进入国家日期： 2023-12-28
- 主分类号： C08F12/08
- IPC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.
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.
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