WO2025261705 - METHOD FOR RECYCLING PLASTICS BY DISSOLUTION WITH SOLVENT-POLYMER SEPARATION AND SOLVENT REINTEGRATION
National phase entry is expected:
Publication Number
WO/2025/261705
Publication Date
26.12.2025
International Application No.
PCT/EP2025/064080
International Filing Date
22.05.2025
Title **
[English]
METHOD FOR RECYCLING PLASTICS BY DISSOLUTION WITH SOLVENT-POLYMER SEPARATION AND SOLVENT REINTEGRATION
[French]
PROCEDE DE RECYCLAGE DE PLASTIQUES PAR DISSOLUTION AVEC SEPARATION SOLVANT-POLYMERE ET REINTEGRATION DU SOLVANT
Applicants **
IFP ENERGIES NOUVELLES
Inventors
MANCINO, Gianluca
LEINEKUGEL LE COCQ, Damien
WEISS, Wilfried
RAVISE, Francis
NGUYEN-HONG, Duc
Priority Data
FR2406673
21.06.2024
FR
Application details
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| 译文 |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2476 | |
| EPO | Filing, Examination, Granting | 9841 | |
| Japan | Filing, Examination, Granting | 2154 | |
| South Korea | Filing, Examination, Granting | 2066 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
21,277
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Abstract[English]
The present invention relates to a method for treating a plastic feedstock, comprising: a) dissolving the plastic feedstock in a dissolution solvent, to obtain a crude polymer solution, b) purifying the crude polymer solution, then c) solvent-polymer separation, comprising a liquid-liquid or supercritical-liquid separation, producing a liquid phase comprising the targeted thermoplastics and a liquid or supercritical solvent phase, then a gas-liquid separation, producing a liquid effluent comprising the targeted thermoplastics, and at least one gaseous effluent, d) a dissolution solvent recycling step, comprising: d1) the recycling, to step a), of at least one fraction of the liquid or supercritical solvent phase; d'1) purification, by tailing, of the liquid or supercritical solvent phase; and/or d2) purification, by topping and/or tailing, of said at least one gaseous effluent. The present invention also relates to a device for implementing said treatment method.[French]
La présente invention concerne un procédé de traitement d'une charge plastique, comprenant : a) la dissolution de la charge plastique dans un solvant de dissolution, pour obtenir une solution polymère brute, b) la purification de la solution polymère brute, puis c) la séparation solvant-polymère, comprenant une séparation liquide-liquide ou supercritique- liquide, produisant une phase liquide comprenant les thermoplastiques visés et une phase solvant liquide ou supercritique, puis une séparation gaz-liquide, produisant un effluent liquide comprenant les thermoplastiques visés et au moins un effluent gaz, d) une étape de recyclage du solvant de dissolution, comprenant : d1) le recyclage vers l'étape a) d'au moins une fraction de la phase solvant liquide ou supercritique; d'1) la purification par équeutage, de la phase solvant liquide ou supercritique; et/ou d2) la purification par étêtage et/ou équeutage dudit au moins un effluent gaz. La présente invention concerne aussi un dispositif pour mettre en œuvre ledit procédé de traitement.