(19)
(11) EP 2 782 907 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
27.06.2018 Bulletin 2018/26

(45) Mention of the grant of the patent:
11.04.2018 Bulletin 2018/15

(21) Application number: 12788603.4

(22) Date of filing: 23.11.2012
(51) International Patent Classification (IPC): 
C07D 323/06(2006.01)
 C08G 2/36(2006.01)
(86) International application number:
PCT/EP2012/073542
(87) International publication number:
WO 2013/076289 (30.05.2013 Gazette 2013/22)

(54)

PROCESS FOR RECYCLING A FORMALDEHYDE SOURCE DURING A POLYMERIZATION PROCESS

VERFAHREN ZUM RECYCELN EINER FORMALDEHYDQUELLE WÄHREND EINES POLYMERISATIONSVORGANGES

PROCEDE DE RECYCLAGE D'UNE SOURCE DE FORMALDEHYDE AU COURS D'UN PROCESSUS DE POLYMERISATION

(84) Designated Contracting States:
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

(30) Priority: 24.11.2011 EP 11190567
24.11.2011 EP 11190574
24.11.2011 EP 11190586
25.10.2012 US 201261718393 P
25.10.2012 US 201261718557 P

(43) Date of publication of application:
01.10.2014 Bulletin 2014/40

(73) Proprietor: Celanese Sales Germany GmbH
65843 Sulzbach (DE)

(72) Inventors:
  • KURZ, Klaus
    65451 Kelsterbach (DE)
  • LINGNAU, Jürgen
    55130 Mainz-Laubenheim (DE)
  • HAUBS, Michael
    55545 Bad Kreuznach (DE)
  • HOFFMOCKEL, Michael
    65527 Niedernhausen (DE)
  • FEORD, Damian
    F-67000 Strasbourg (FR)

(74) Representative: Lahrtz, Fritz et al
Isenbruck Bösl Hörschler LLP Patentanwälte Prinzregentenstrasse 68
81675 München
81675 München (DE)


(56) References cited: : 
WO-A1-2007/023187
 WO-A1-2008/012232
   
  • YAMAGUCHI T ET AL: "Synthesis of cyclooligomers of formaldehyde in liquid sulfur dioxide", CHEMISTRY & INDUSTRY, vol. 43, 23 October 1971 (1971-10-23), pages 1226-1227, XP008149518, SOCIETY OF CHEMICAL INDUSTRY, LONDON; GB ISSN: 0009-3068
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).