公开(公告)号：US20250083360A1

公开(公告)日：2025-03-13

申请号：US18266930

申请日：2021-12-02

Applicant: IFP Energies nouvelles

Inventor： Damien LEINEKUGEL LE COCQ ,  Wilfried WEISS ,  Mathilde SIBEAUD ,  Frederic AUGIER

IPC: B29B17/02 ,  B29K23/00 ,  C08J11/08

Abstract: A process for treating a plastic feedstock, including a dissolution step involving placing the plastic feedstock in contact with a dissolution solvent, at between 100° C. and 300° C. and pressure of between 1 and 20.0 MPa abs, to dissolve at least a portion of the polymers of the plastic feedstock and to obtain a crude polymer solution. Also, extraction by placing the crude polymer solution in contact with an extraction solvent, at between 100° C. and 300° C., a pressure between 1 and 20.0 MPa abs and at a mass ratio between the mass flow rate of the extraction solvent and the mass flow rate of the crude polymer solution between 0.05 and 20.0, to obtain an extracted polymer solution and a spent solvent. Furthermore, recovering the polymers to obtain a solvent fraction and a purified polymer fraction.

公开(公告)号：US20240227246A1

公开(公告)日：2024-07-11

申请号：US18561498

申请日：2022-05-05

Applicant: IFP ENERGIES NOUVELLES

Inventor： Mayara AZIN GONDIM PAIVA ,  Céline BERTINO-GHERA ,  Alexandra CHAUMONNOT ,  Adrien MEKKI-BERRADA ,  Mathilde SIBEAUD

IPC: B29B17/02 ,  B29B17/04 ,  B29K27/06 ,  B29K105/00 ,  C07C67/02 ,  C07C67/03

CPC classification number: B29B17/02 ,  B29B17/0412 ,  C07C67/02 ,  C07C67/03 ,  B29B2017/0203 ,  B29B2017/0224 ,  B29B2017/0231 ,  B29B2017/0265 ,  B29B2017/0296 ,  B29K2027/06 ,  B29K2105/0038

Abstract: The present invention relates to a process for obtaining a dialkyl phthalate and a reusable target PVC plastic from a PVC feedstock containing at least one phthalate, including:



a) a solid-liquid extraction of said PVC feedstock in the form of particles by placing said particles of the PVC feedstock in contact with a solvent including at least one alcohol CnH2n+1OH with n 8, to produce a liquid phase enriched in said phthalate and a solid phase including PVC plastic depleted in said phthalate;
b) transformation of said phthalate of said liquid phase into dialkyl phthalate of formula C6H4(COOCnH2n+1)2 by transesterification using said alcohol;
c) a solid-liquid separation between the solid phase and the liquid phase to produce at least one solid stream including the PVC plastic depleted in said phthalate so as to obtain said target PVC plastic;
d) a liquid-liquid separation of the liquid phase, to produce at least a first liquid effluent including said dialkyl phthalate and a second liquid effluent comprising said solvent.

公开(公告)号：US20240051186A1

公开(公告)日：2024-02-15

申请号：US18266895

申请日：2021-12-02

Applicant: IFP Energies nouvelles

Inventor： Wilfried WEISS ,  Damien LEINEKUGEL LE COCQ ,  Mathilde SIBEAUD ,  Amir Hossein AHMADI-MOTLAGH

IPC: B29B17/02

CPC classification number: B29B17/02 ,  B29B2017/0224 ,  B29B2017/0265 ,  B29B2017/0293

Abstract: The present invention relates to a process for treating a plastic feedstock, comprising:



a) a dissolution step involving placing the feedstock in contact with a dissolution solvent, at a dissolution temperature of between 100° C. and 300° C. and a dissolution pressure of between 1 and 20.0 MPa abs, the dissolution solvent having a boiling point of between −50° C. and 250° C., to obtain a crude polymer solution;
b) a step of adsorption by placing the crude polymer solution in contact with an adsorbent, at a temperature of between 100 and 300° C. and a pressure of between 1.0 and 20.0 MPa abs, to obtain a refined polymer solution; and then
c) a step of recovering the polymers, to obtain at least one solvent fraction and one purified polymer fraction.