WO2026114747 - METHOD FOR RECYCLING PVC PLASTIC-BASED WASTE BY LIQUID-LIQUID EXTRACTION
National phase entry is expected:
Publication Number
WO/2026/114747
Publication Date
04.06.2026
International Application No.
PCT/EP2025/083742
International Filing Date
21.11.2025
Title **
[English]
METHOD FOR RECYCLING PVC PLASTIC-BASED WASTE BY LIQUID-LIQUID EXTRACTION
[French]
PROCEDE DE RECYCLAGE DE DECHETS A BASE DE PLASTIQUES PVC PAR EXTRACTION LIQUIDE-LIQUIDE
Applicants **
IFP ENERGIES NOUVELLES
Inventors
AUCHÈRE, Noémie
BERLIOZ-BARBIER, Alexandra
LE MASLE, Agnès
CHAUMONNOT, Alexandra
LEINEKUGEL LE COCQ, Damien
LORCET, Hélène
Priority Data
FR2413069
27.11.2024
FR
Application details
| Total Number of Claims/PCT | * |
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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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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2398 | |
| EPO | Filing, Examination, Granting | 9961 | |
| Japan | Filing, Examination, Granting | 2192 | |
| South Korea | Filing, Examination, Granting | 2118 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
21,409
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Abstract[English]
The present invention relates to a method for recovering a stream of one or more purified PVC polymers from a PVC-based plastic feedstock comprising one or more PVC polymers and at least two families of additives, the method using a biphasic solvent system comprising two immiscible liquid phases A and B, the method comprising: a) a dissolving step that comprises bringing the plastic feedstock into contact with a dissolving liquid consisting of phase A to obtain at least one crude polymer solution (1); b) a step of liquid-liquid extraction, in at least one zone, of the crude polymer solution (1), the liquid-liquid extraction step being carried out in the presence of a single extraction liquid (4) consisting of phase B to obtain a purified polymer solution (3) and at least one final additive stream (2) comprising the at least two families of additives; c) a polymer-solvent separation step to separate the purified polymer solution into a stream of one or more purified PVC polymers and at least one solvent fraction comprising phase A.[French]
La présente invention concerne un procédé de récupération d'un flux de polymère(s) PVC purifié à partir d'une charge plastique à base de PVC comportant un ou plusieurs polymères PVC et au moins deux familles d'additifs mettant en œuvre un système de solvants biphasique comprenant deux phases liquides A et B non-miscibles, ledit procédé comprenant : a) une étape de dissolution comprenant la mise en contact de ladite charge plastique avec un liquide de dissolution constitué par la phase A, pour obtenir au moins une solution polymère brute (1); b) une étape d'extraction liquide-liquide, dans au moins une zone, de la solution polymère brute (1), en présence d'un unique liquide d'extraction (4) constitué par la phase B pour obtenir une solution polymère purifiée (3) et au moins un flux d'additifs final (2) comportant lesdites au moins deux familles d'additifs; c) une étape de séparation polymère-solvant, pour séparer la solution polymère purifiée en un flux de polymère(s) PVC purifié et au moins une fraction solvant comprenant la phase A.