EP 4251603 A1 20231004 - IMPROVED METHOD FOR RECYCLING PET BY ALCOHOLYSIS
Title (en)
IMPROVED METHOD FOR RECYCLING PET BY ALCOHOLYSIS
Title (de)
VERBESSERTES VERFAHREN ZUR WIEDERVERWERTUNG VON PET DURCH ALKOHOLYSE
Title (fr)
PROCEDE AMELIORE DE RECYCLAGE DE PET PAR ALCOOLYSE
Publication
Application
Priority
- FR 2012085 A 20201124
- FR 2021052085 W 20211124
Abstract (en)
[origin: CA3199380A1] The present invention relates to the field of recycling PET-type plastics commonly used for the manufacture of disposable plastic bottles, food trays, textiles, etc. More specifically, it relates to a method for converting PET into dimethyl terephthalate (DMT) in a few hours (less than 5 hours) by means of a complete reaction resulting in a product free of impurities. The depolymerisation step is carried out in the presence of a monoalcohol as well as an organic base with a guanidine or amidine unit, and a second base which may be either an inorganic base or an ether oxide. These two bases are present in catalytic amounts relative to the amount of PET to be treated.
IPC 8 full level
C07C 67/03 (2006.01); C07C 69/82 (2006.01); C08J 11/14 (2006.01); C08J 11/22 (2006.01); C08J 11/28 (2006.01)
CPC (source: EP KR US)
C07C 67/03 (2013.01 - EP KR); C07C 69/82 (2013.01 - KR); C08G 63/183 (2013.01 - KR); C08J 11/14 (2013.01 - EP KR); C08J 11/22 (2013.01 - EP KR US); C08J 11/28 (2013.01 - EP KR US); C08J 2367/02 (2013.01 - EP KR US); 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)
FR 3116532 A1 20220527; FR 3116532 B1 20221028; CA 3199380 A1 20220602; CN 116685572 A 20230901; EP 4251603 A1 20231004; JP 2023553315 A 20231221; KR 20230129010 A 20230905; US 2023399485 A1 20231214; WO 2022112715 A1 20220602; ZA 202305504 B 20240228
DOCDB simple family (application)
FR 2012085 A 20201124; CA 3199380 A 20211124; CN 202180078952 A 20211124; EP 21823983 A 20211124; FR 2021052085 W 20211124; JP 2023531578 A 20211124; KR 20237021316 A 20211124; US 202118253439 A 20211124; ZA 202305504 A 20230522