EP 4341332 A1 20240327 - METHOD FOR EXTRACTION AND TRANSFORMATION BY TRANSESTERIFICATION OF PHTHALATES CONTAINED IN PVC PLASTICS MATERIALS
Title (en)
METHOD FOR EXTRACTION AND TRANSFORMATION BY TRANSESTERIFICATION OF PHTHALATES CONTAINED IN PVC PLASTICS MATERIALS
Title (de)
VERFAHREN ZUR EXTRAKTION UND UMWANDLUNG DURCH UMESTERUNG VON PHTHALATEN AUS PVC-KUNSTSTOFFEN
Title (fr)
PROCEDE D'EXTRACTION ET DE TRANSFORMATION PAR TRANSESTERIFICATION DE PHTALATES CONTENUS DANS DES PLASTIQUES PVC
Publication
Application
Priority
- FR 2105300 A 20210520
- EP 2022062082 W 20220505
Abstract (en)
[origin: WO2022243043A1] The present invention relates to a method for obtaining a dialkyl phthalate and a reusable target PVC plastics material from a PVC feedstock containing at least one phthalate, comprising: a) solid-liquid extraction of the PVC feedstock in the form of particles by placing said particles of the PVC feedstock in contact with a solvent comprising a chemical molecule of the ester, ether, ketal or acetal type, of empirical formula (CnH2n+1O)mZ, where n < 4 or n > 8, m is between 1 and 3, and Z is selected from R, COOR, CO, CR, CNRR', PO, P, SO, SO2, COR or HCO, with R and R' being alkyl or aryl groups, producing a liquid phase enriched with said phthalate and a solid phase comprising PVC plastics material depleted of said phthalate; b) transforming said phthalate of said liquid phase into dialkyl phthalate of formula C6H4(COOCnH2n+1)2 by transesterification by means of said solvent; c) solid-liquid separation between the solid phase and the liquid phase, producing at least one solid stream comprising the PVC plastics material depleted of said phthalate in order to obtain said target PVC plastics material; d) liquid-liquid separation of the liquid phase, producing at least a first liquid effluent comprising said dialkyl phthalate and a second liquid effluent comprising said solvent.
IPC 8 full level
C08J 11/02 (2006.01); B29B 17/02 (2006.01); C07C 67/02 (2006.01); C07C 67/08 (2006.01); C07C 67/48 (2006.01); C07C 67/56 (2006.01); C07C 69/80 (2006.01)
CPC (source: EP KR)
B29B 17/02 (2013.01 - EP KR); B29B 17/0412 (2013.01 - KR); C07C 67/02 (2013.01 - EP KR); C08J 11/02 (2013.01 - EP KR); B29B 17/0412 (2013.01 - EP); B29B 2017/0296 (2013.01 - EP KR); B29K 2027/06 (2013.01 - EP); B29K 2105/0038 (2013.01 - EP KR); C08J 2327/06 (2013.01 - EP KR); Y02P 20/143 (2015.11 - KR); Y02W 30/62 (2015.05 - EP KR)
C-Set (source: EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022243043 A1 20221124; AU 2022275987 A1 20231012; BR 112023020502 A2 20231205; CA 3213694 A1 20221124; CN 117321126 A 20231229; CO 2023015466 A2 20240125; EP 4341332 A1 20240327; FR 3123070 A1 20221125; FR 3123070 B1 20230602; JP 2024518623 A 20240501; KR 20240010498 A 20240123; MX 2023013269 A 20231130; TW 202311391 A 20230316
DOCDB simple family (application)
EP 2022062082 W 20220505; AU 2022275987 A 20220505; BR 112023020502 A 20220505; CA 3213694 A 20220505; CN 202280036046 A 20220505; CO 2023015466 A 20231116; EP 22727177 A 20220505; FR 2105300 A 20210520; JP 2023571658 A 20220505; KR 20237044000 A 20220505; MX 2023013269 A 20220505; TW 111118530 A 20220518