EP 2225296 A1 20100908 - METHOD FOR THE PRODUCTION OF POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS BY HOMOPOLYMERIZING OR COPOLYMERIZING TRIOXANE, STARTING FROM METHANOL
Title (en)
METHOD FOR THE PRODUCTION OF POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS BY HOMOPOLYMERIZING OR COPOLYMERIZING TRIOXANE, STARTING FROM METHANOL
Title (de)
VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENHOMO- ODER -COPOLYMEREN DURCH HOMO- ODER COPOLYMERISATION VON TRIOXAN, AUSGEHEND VON METHANOL
Title (fr)
PROCÉDÉ DE PRODUCTION D'HOMOPOLYMÈRES ET DE COPOLYMÈRES DE POLYOXYMÉTHYLÈNE PAR HOMOPOLYMÉRISATION OU COPOLYMÉRISATION DE TRIOXANE, À PARTIR DE MÉTHANOL
Publication
Application
Priority
- EP 2008067286 W 20081211
- EP 07150113 A 20071219
- EP 08861536 A 20081211
Abstract (en)
[origin: WO2009077415A1] Disclosed is a method for producing polyoxymethylene homopolymers or copolymers (7) by homopolymerizing or copolymerizing trioxane, starting from methanol (1) that is oxidized in a first reactor of a first production system (A) such that an aqueous formaldehyde-containing stream (2) is obtained that is fed to a second production system (B) in which pure trioxane (6) is obtained. In said method, low-boiling fractions (5) are separated by distillation, and the pure trioxane (6) is fed to a third production system (C) in which the pure trioxane (6) is homopolymerized or copolymerized to obtain polyoxymethylene homopolymers or copolymers (7). The disclosed method is characterized in that the stream of low-boiling fractions (5) is recycled from the column (K 2) separating low-boiling fractions into the inlet of the first reactor in the first production system (A).
IPC 8 full level
C08G 2/10 (2006.01); C07D 323/06 (2006.01)
CPC (source: EP US)
C07D 323/06 (2013.01 - EP US); C08G 2/10 (2013.01 - EP US)
Citation (search report)
See references of WO 2009077415A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009077415 A1 20090625; AU 2008337624 A1 20090625; BR PI0820853 A2 20150616; CA 2707613 A1 20090625; CN 101903430 A 20101201; CN 101903430 B 20130424; EP 2225296 A1 20100908; JP 2011506720 A 20110303; KR 20100105610 A 20100929; MX 2010005954 A 20100611; MY 151105 A 20140415; US 2010280195 A1 20101104; US 8378144 B2 20130219
DOCDB simple family (application)
EP 2008067286 W 20081211; AU 2008337624 A 20081211; BR PI0820853 A 20081211; CA 2707613 A 20081211; CN 200880121569 A 20081211; EP 08861536 A 20081211; JP 2010538590 A 20081211; KR 20107013446 A 20081211; MX 2010005954 A 20081211; MY PI20102295 A 20081211; US 74774208 A 20081211