EP 4263168 A1 20231025 - RECYCLING METHOD FOR CONTAMINATED POLYOLEFINS
Title (en)
RECYCLING METHOD FOR CONTAMINATED POLYOLEFINS
Title (de)
RECYCLING-VERFAHREN FÜR VERUNREINIGTE POLYOLEFINE
Title (fr)
PROCÉDÉ DE RECYCLAGE POUR POLYOLÉFINES CONTAMINÉES
Publication
Application
Priority
- CH 15952020 A 20201216
- EP 2021086141 W 20211216
Abstract (en)
[origin: WO2022129309A1] The invention relates to a recycling method for producing a polyolefin recyclate, involving the process of removing contaminants from a contaminated polyolefin material, wherein a contaminated polyolefin material is soaked in a solvent in a soaking step in order to dissolve contaminants present in the contaminated polyolefin material in the solvent and remove the solvent and the contaminants dissolved in the solvent from the polyolefin material. According to the invention, prior to the soaking step, a washing step is carried out using water, cleaning agents, and/or lye. The contaminated polyolefin material is changed by the soaking/solvent recycling method such that (i) more than 90% of the low molecular chains below 2000 Dalton are removed or washed out, and the average molecular chain length of the polyolefin recyclate is therefore increased, and (ii) the melt flow rate (MVR) of the polyolefin recyclate is reduced to a specified MVR.
IPC 8 full level
B29B 17/02 (2006.01); B29B 17/00 (2006.01); C08J 11/08 (2006.01); B29K 23/00 (2006.01)
CPC (source: CH EP US)
B29B 7/002 (2013.01 - EP); B29B 7/66 (2013.01 - EP); B29B 7/885 (2013.01 - EP); B29B 7/94 (2013.01 - EP); B29B 9/16 (2013.01 - EP); B29B 13/00 (2013.01 - EP); B29B 17/02 (2013.01 - CH EP US); C08J 11/08 (2013.01 - EP); B29B 2009/168 (2013.01 - EP); B29B 2013/002 (2013.01 - EP); B29B 2017/0015 (2013.01 - EP); B29B 2017/0217 (2013.01 - CH); B29B 2017/0289 (2013.01 - US); B29B 2017/0293 (2013.01 - EP); B29K 2023/065 (2013.01 - CH EP); C08J 2323/02 (2013.01 - EP); C08J 2323/12 (2013.01 - EP); Y02W 30/62 (2015.05 - 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 2022129309 A1 20220623; CH 718174 A1 20220630; CN 116601216 A 20230815; EP 4263168 A1 20231025; MX 2023006197 A 20230629; US 2024051185 A1 20240215
DOCDB simple family (application)
EP 2021086141 W 20211216; CH 15952020 A 20201216; CN 202180084211 A 20211216; EP 21840814 A 20211216; MX 2023006197 A 20211216; US 202118258198 A 20211216