WO2026114746 - SOLVENT SYSTEM FOR FRACTIONATION OF A PVC PLASTIC BY LIQUID-LIQUID EXTRACTION
National phase entry is expected:
Publication Number
WO/2026/114746
Publication Date
04.06.2026
International Application No.
PCT/EP2025/083740
International Filing Date
21.11.2025
Title **
[English]
SOLVENT SYSTEM FOR FRACTIONATION OF A PVC PLASTIC BY LIQUID-LIQUID EXTRACTION
[French]
SYSTÈME DE SOLVANTS POUR LE FRACTIONNEMENT D'UN PLASTIQUE PVC PAR EXTRACTION LIQUIDE-LIQUIDE
Applicants **
IFP ENERGIES NOUVELLES
Inventors
AUCHÈRE, Noémie
BERLIOZ-BARBIER, Alexandra
LE MASLE, Agnès
CHAUMONNOT, Alexandra
Priority Data
FR2413065
27.11.2024
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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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2102 | |
| EPO | Filing, Examination, Granting | 8597 | |
| Japan | Filing, Examination, Granting | 2142 | |
| South Korea | Filing, Examination, Granting | 1989 | |
| USA | Filing, Examination, Granting | 5940 |
Total:
20,770
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Abstract[English]
The present invention relates to a solvent system specific to fractionation by liquid-liquid extraction, particularly by centrifugal partition chromatography, of a PVC-based feedstock comprising a PVC polymer and at least one additive. The system comprises two non-miscible liquid phases A and B, each comprising an organic solvent or a mixture of organic solvents selected from the same list consisting of ketones, amides, azines, esters, ethers, halogenated solvents, hydrocarbons, sulfur-containing solvents, and dihydrolevoglucosenone. The partition coefficient of the PVC polymer in the solvent system (ratio of the mass concentrations of the PVC polymer dissolved in phase B and in phase A) tends towards zero, and the partition coefficient of the additive in the solvent system (ratio of the mass concentrations of the additive dissolved in phase B and in phase A) is greater than or equal to 0.05.[French]
La présente invention concerne un système de solvants spécifique au fractionnement par extraction liquide-liquide, notamment par chromatographie de partage centrifuge, d'une charge à base de PVC comportant un polymère PVC et au moins un additif. Le système comprend deux phases liquides A et B non-miscibles, chacune comportant un solvant organique ou un mélange de solvants organiques choisis dans une même liste constituée par les cétones, amides, azines, esters, éthers, solvants halogénés, hydrocarbures, solvants sulfurés, et la dihydrolévoglucosénone. Le coefficient de partage du polymère PVC dans le système de solvants (rapport des concentrations massiques polymère PVC dissous dans la phase B et dans la phase A) tend vers zéro, et le coefficient de partage dudit additif dans le système de solvants (rapport des concentrations massiques dudit additif dissous dans la phase B et dans la phase A) est supérieur ou égal à 0,05.