(19)
(11) EP 2 763 954 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:
30.08.2017 Bulletin 2017/35

(45) Mention of the grant of the patent:
08.03.2017 Bulletin 2017/10

(21) Application number: 12778861.0

(22) Date of filing: 02.10.2012
(51) International Patent Classification (IPC): 
C07C 51/353(2006.01)
(86) International application number:
PCT/US2012/058431
(87) International publication number:
WO 2013/052464 (11.04.2013 Gazette 2013/15)

(54)

PROCESSES FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES

VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄUREN UND ACRYLATEN

PROCÉDÉS DE PRÉPARATION D'ACIDES ACRYLIQUES ET D'ACRYLATES

(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: 03.10.2011 US 201113251623
23.03.2012 US 201213428065

(43) Date of publication of application:
13.08.2014 Bulletin 2014/33

(73) Proprietor: Celanese International Corporation
Irving, TX 75039 (US)

(72) Inventors:
  • MUELLER, Sean
    Pasadena, Texas 77505 (US)
  • CHAPMAN, Josefina T.
    Houston, Texas 77059 (US)
  • PETERSON, Craig J.
    Hebron, KY 41048 (US)
  • NAGAKI, Dick
    The Woodlands, Texas 77381 (US)

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


(56) References cited: : 
   
  • MAMORU AI: "The production of methacrylic acidby the vapor-phase aldol condensation of propionic acid with formaldehyde", JOURNAL OF CATALYSIS, vol. 124, 1990, pages 293-296, XP002689804,
  • MARORU AI ET.AL.: "Production of methacrylic acid by vapor-phase aldol condensation of propionic acid with formaldehyde over silica-supported metal phosphate catalysts", APPLIED CATALYSIS A: GENERAL, vol. 252, 2003, pages 185-191, XP002689805,
  • MAMORU AI: "Vapor-phase Aldol condensation of formaldehyde with acetic acid on V2O5-P2O5 catalysts", JOURNAL OF CATALYSIS, ACADEMIC PRESS, DULUTH, MN, US, vol. 107, 1 January 1987 (1987-01-01), pages 201-208, XP002667283, ISSN: 0021-9517 cited in the application
   
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).