EP 4133003 A2 20230215 - RECYCLING OF POLYACETAL FOR THE PRODUCTION OF POLYOXYMETHYLENE DIALKYL ETHERS
Title (en)
RECYCLING OF POLYACETAL FOR THE PRODUCTION OF POLYOXYMETHYLENE DIALKYL ETHERS
Title (de)
POLYACETAL-RECYCLING ZUR HERSTELLUNG VON POLYOXYMETHYLENDIALKYLETHERN
Title (fr)
RECYCLAGE DE POLYACÉTAL POUR LA PRODUCTION DE POLYOXYMÉTHYLÈNEDIALKYLÉTHERS
Publication
Application
Priority
- FR 2003468 A 20200407
- EP 2021058921 W 20210406
Abstract (en)
[origin: WO2021204789A2] The present invention relates to a process for recycling polyacetal having from 8 to 100 000 carbon atoms for obtaining a produced polyoxymethylene dialkyl ether of formula R-(OCH2)n-OR', in which R and R' independently represent a methyl group or an ethyl group and n is an integer greater than or equal to 1, the process comprising a step of reacting an acid catalyst with a mixture comprising a polyacetal having from 8 to 100 000 carbon atoms, a reactive polyoxymethylene dialkyl ether of formula R-(OCH2)k-OR' in which k is an integer greater than or equal to 1, and optionally a solvent.
IPC 8 full level
C07C 31/20 (2006.01); C07C 41/50 (2006.01); C07C 43/30 (2006.01); C07C 67/343 (2006.01); C07C 69/54 (2006.01); C08G 2/36 (2006.01); C08J 11/16 (2006.01); C08J 11/22 (2006.01)
CPC (source: EP KR US)
C07C 29/10 (2013.01 - US); C07C 41/50 (2013.01 - EP KR); C07C 43/30 (2013.01 - EP KR); C07C 45/27 (2013.01 - US); C07C 51/16 (2013.01 - US); C08G 2/08 (2013.01 - US); C08G 2/24 (2013.01 - KR); C08G 2/36 (2013.01 - EP KR US); C08J 11/22 (2013.01 - EP KR US); C08J 2359/00 (2013.01 - EP KR); C08J 2359/02 (2013.01 - US); C08J 2471/02 (2013.01 - EP KR); Y02W 30/62 (2015.05 - EP KR)
Citation (search report)
See references of WO 2021204789A2
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 3108909 A1 20211008; CN 115605533 A 20230113; EP 4133003 A2 20230215; JP 2023521731 A 20230525; KR 20220164772 A 20221213; US 2023151180 A1 20230518; WO 2021204789 A2 20211014; WO 2021204789 A3 20211230
DOCDB simple family (application)
FR 2003468 A 20200407; CN 202180035313 A 20210406; EP 2021058921 W 20210406; EP 21715923 A 20210406; JP 2022561168 A 20210406; KR 20227038649 A 20210406; US 202117916820 A 20210406