US 11,692,087 B2
Process for producing monovinylaromatic polymer incorporating post-consumer recycled polystyrene, monovinylaromatic polymer incorporating post-consumer recycled polystyrene and articles produced thereof
Jose-Maria Pere, Barcelona (ES); Antonio Guinovart, Barcelona (ES); Armelle Sigwald, Nivelles (BE); Laetitia Urbanczyk, Anderlues (BE); Martine Slawinski, Nivelles (BE); Pascal Charlier, Evere (BE); Elodie Perche, Brussels (BE); Serge Eon, Waterloo (BE); Thierry Marcoux, Casteau (BE); and Matthieu Adam-Berret, Thimeon (BE)
Assigned to TOTALENERGIES ONETECH BELGIUM, Seneffe (BE)
Filed by Total Research & Technology Feluy, Seneffe (BE)
Filed on Aug. 17, 2021, as Appl. No. 17/404,491.
Application 17/404,491 is a division of application No. 16/489,231, granted, now 11,124,638, previously published as PCT/EP2018/054868, filed on Feb. 28, 2018.
Claims priority of application No. 17158333 (EP), filed on Feb. 28, 2017.
Prior Publication US 2021/0371636 A1, Dec. 2, 2021
Int. Cl. B29B 17/02 (2006.01); C08L 25/06 (2006.01); C08F 257/02 (2006.01); C08J 11/04 (2006.01); B29B 17/00 (2006.01); B29B 17/04 (2006.01); B29K 25/00 (2006.01)
CPC C08L 25/06 (2013.01) [B29B 17/02 (2013.01); C08F 257/02 (2013.01); C08J 11/04 (2013.01); B29B 2017/0015 (2013.01); B29B 2017/0224 (2013.01); B29B 2017/0293 (2013.01); B29B 2017/042 (2013.01); B29K 2025/06 (2013.01); C08F 2400/00 (2013.01); C08J 2325/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An installation for using a process to produce a monovinylaromatic polymer comprising post-consumer recycled polystyrene (PCR-PS), the installation comprising:
at least one dissolver with agitating means, wherein the dissolver is configured to provide a polymerization mixture;
suppliers to provide PCR-PS and monovinylaromatic monomer to the dissolver;
a filtration system configured to produce, from the polymerization mixture, a stream of filtered polymerization mixture having a reduced content of insoluble materials relative to the polymerization mixture;
one or more lines connecting the filtration system and the dissolver and configured to redirect at least a part of the stream of filtered polymerization mixture exiting the filtration system back to the dissolver prior to introduction into one or more downstream polymerization reactors;
the one or more downstream polymerization reactors; and
lines to direct a stream of filtered polymerization mixture exiting the filtration system to the one or more polymerization reactors, wherein the process comprises:
a) providing a PCR-PS and a monovinylaromatic monomer to at least one dissolver;
b) mixing the PCR-PS and the monovinylaromatic monomer within the dissolver to dissolve the PCR-PS in the monovinylaromatic monomer so as to produce a polymerization mixture, wherein the polymerization mixture comprises insoluble material originated from the dissolved PCR-PS;
c) filtering the polymerization mixture in a filtration system in order to obtain a stream of filtered polymerization mixture;
d) ending the filtering of the polymerization mixture and recovering the filtered polymerization mixture; and
e) polymerizing at least a portion of the filtered polymerization mixture in the one or more polymerization reactor to form a monovinylaromatic polymer comprising PCR-PS;
wherein the step c) of filtering the polymerization mixture includes continuously redirecting at least a part of the stream of the filtered polymerization mixture exiting the filtration system back to the dissolver and mixing it with the polymerization mixture so as to continuously reduce the content of insoluble material in the polymerization mixture contained in the dissolver.