(19)
(11) EP 4 377 503 A1

(12)

(43) Date of publication:
05.06.2024 Bulletin 2024/23

(21) Application number: 22754085.3

(22) Date of filing: 22.07.2022
(51) International Patent Classification (IPC): 
D01D 5/06(2006.01)
D01D 13/02(2006.01)
D01F 2/02(2006.01)
D01D 1/02(2006.01)
 D01D 10/06(2006.01)
D01F 2/00(2006.01)
D21H 13/08(2006.01)
(52) Cooperative Patent Classification (CPC):
D01D 5/06; D01D 10/06; D01D 13/02; D01F 2/02; D21H 13/08; D01D 1/02
(86) International application number:
PCT/EP2022/070609
(87) International publication number:
WO 2023/006601 (02.02.2023 Gazette 2023/05)
(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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 26.07.2021 EP 21187680

(71) Applicant: LENZING AKTIENGESELLSCHAFT
4860 Lenzing (AT)

(72) Inventors:
  • RÖDER, Thomas
    4840 Vöcklabruck (AT)
  • SUCHOMEL, Friedrich
    4861 Schörfling (AT)
  • MAYRHOFER-HUBER, Christian
    4850 Timelkam (AT)
  • DUSCHLBAUER, Markus
    4850 Timelkam (AT)

   


(54) IMPROVEMENTS RELATING TO THE COLD-ALKALI PROCESS FOR THE PRODUCTION OF REGENERATED CELLULOSIC FIBERS