EP 1912965 A1 20080423 - INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE
Title (en)
INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE
Title (de)
INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON TRIOXAN AUS FORMALDEHYD
Title (fr)
PROCEDE INTEGRE DE PRODUCTION DE TRIOXANE A PARTIR DE FORMALDEHYDE
Publication
Application
Priority
- EP 2006064406 W 20060719
- DE 102005036544 A 20050803
Abstract (en)
[origin: WO2007014853A1] The invention relates to an integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) feeding a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting essentially of water and formaldehyde to a trioxane synthesis reactor and allowing them to react to obtain a product stream A2 comprising trioxane, water and formaldehyde; b) feeding stream A2 to a first low-pressure distillation column and distilling it at a pressure of 0.1 to 2.5 bar to obtain a stream B1 which has been enriched in trioxane and additionally comprises water and formaldehyde and the recycle stream B2 which consists essentially of formaldehyde and water; c) feeding stream B1 and a recycle stream D1 which comprises trioxane, water and formaldehyde to a second low-pressure distillation column and distilling them at a pressure of 0.1 to 2.5 bar to obtain a stream C1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C2 consisting essentially of formaldehyde and water; d) feeding stream C1 to a high-pressure distillation column and distilling it at a pressure of 0.2 to 17.5 bar to obtain the recycle stream D1 and a product stream D2 consisting essentially of trioxane, wherein a removal of the low boilers present in streams B1 and/or C1 can be undertaken between steps b) and c) or c) and d).
IPC 8 full level
C07D 323/06 (2006.01)
CPC (source: EP KR US)
C07D 323/06 (2013.01 - EP KR US); Y02P 20/10 (2015.11 - EP US)
Citation (search report)
See references of WO 2007014853A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007014853 A1 20070208; AU 2006274886 A1 20070208; BR PI0614142 A2 20181226; CA 2623572 A1 20070208; CN 101277944 A 20081001; DE 102005036544 A1 20070215; EP 1912965 A1 20080423; JP 2009503016 A 20090129; KR 20080034975 A 20080422; NO 20080529 L 20080229; US 2008194845 A1 20080814
DOCDB simple family (application)
EP 2006064406 W 20060719; AU 2006274886 A 20060719; BR PI0614142 A 20060719; CA 2623572 A 20060719; CN 200680036560 A 20060719; DE 102005036544 A 20050803; EP 06764207 A 20060719; JP 2008524474 A 20060719; KR 20087005004 A 20080229; NO 20080529 A 20080129; US 99761906 A 20060719