US 12,091,469 B2
Method and system for the production of a spinning dope composition
Carina Olsson, Gothenburg (SE); Bengt Hagström, Gothenburg (SE); and Tobias Köhnke, Gothenburg (SE)
Assigned to TREETOTEXTILE AB, Bjarred (SE)
Filed by TREETOTEXTILE AB, Bjarred (SE)
Filed on Jul. 26, 2023, as Appl. No. 18/226,465.
Application 17/346,293 is a division of application No. 16/093,271, granted, now 11,299,556, issued on Apr. 12, 2022, previously published as PCT/EP2017/058785, filed on Apr. 12, 2017.
Application 18/226,465 is a continuation of application No. 17/346,293, filed on Jun. 13, 2021, granted, now 11,753,482.
Claims priority of application No. 16165374 (EP), filed on Apr. 14, 2016.
Prior Publication US 2023/0365718 A1, Nov. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01F 33/82 (2022.01); B01F 21/00 (2022.01); C08B 1/00 (2006.01); C08B 1/08 (2006.01); C08J 3/05 (2006.01); C08K 5/21 (2006.01); C08L 1/02 (2006.01); D01D 1/02 (2006.01); D01D 5/06 (2006.01); D01F 1/10 (2006.01); D01F 2/02 (2006.01); D21H 13/08 (2006.01); C08K 3/22 (2006.01)
CPC C08B 1/003 (2013.01) [B01F 21/02 (2022.01); B01F 33/821 (2022.01); C08J 3/05 (2013.01); D01D 1/02 (2013.01); D01F 2/02 (2013.01); C08K 2003/2296 (2013.01); D10B 2201/22 (2013.01)] 44 Claims
OG exemplary drawing
 
1. A method for the production of a spinning dope composition, said method comprising
a homogenization step involving vigorous mixing of a cellulosic pulp material in alkali solution, vigorous mixing implying supplying a power density of at least 150 kW/m3 (KW supplied to agitators per mixed unit of liquid volume) to agitators used in the homogenization step, and thereafter
a dissolution step involving mixing of the cellulosic pulp material in the alkali solution to obtain a spinning dope composition,
wherein the homogenization is performed during a time of less than 120 s.