(19)
(11) EP 4 816 347 A1

(12)

(43) Date of publication:
07.10.2026 Bulletin 2026/41

(21) Application number: 24817232.2

(22) Date of filing: 28.11.2024
(51) International Patent Classification (IPC): 
C07C 51/44(2006.01)
C07C 57/04(2006.01)
(52) Cooperative Patent Classification (CPC):
C07C 51/44
 
C-Sets:
C07C 51/44, C07C 57/04;
(86) International application number:
PCT/EP2024/083865
(87) International publication number:
WO 2025/114418 (05.06.2025 Gazette 2025/23)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 28.11.2023 EP 23212521

(71) Applicant: BASF SE
67056 Ludwigshafen am Rhein (DE)

(72) Inventors:
  • ASKANI, Rainer
    68259 Mannheim (DE)
  • ALENCAR DE OLIVEIRA, Raphael
    Zhanjiang, Zhejiang 524094 (CN)
  • CRAUWELS, Filip
    2040 Antwerpen (BE)
  • DUERR, Anna Katharina
    Kuantan, 26080 (MY)
  • STEVENS, Jolien
    67056 Ludwigshafen am Rhein (DE)
  • GIESHOFF, Tile
    67056 Ludwigshafen am Rhein (DE)
  • ZUROWSKI, Peter
    67056 Ludwigshafen am Rhein (DE)

(74) Representative: Meissner Bolte Partnerschaft mbB 
Patentanwälte Rechtsanwälte Postfach 86 06 24
81633 München
81633 München (DE)

   


(54) PROCESS FOR THE DISTILLATION OF ACRYLIC ACID WITH SPLIT-DOSING OF POLYMERIZATION INHIBITOR