公开(公告)号：US10138578B2

公开(公告)日：2018-11-27

申请号：US14900904

申请日：2014-06-27

申请人： TreeToTextile AB

发明人： Lars Stigsson ,  Bengt Hagström ,  Tobias Köhnke ,  Artur Hedlund ,  Marta Bialik

IPC分类号： D01F13/02 ,  C01D1/28 ,  C08B16/00 ,  C01D5/00 ,  D01F2/02

摘要： The present invention concerns a method for the recovery of solvent in a process for preparation of regenerated cellulosic fibers using sodium hydroxide as solvent for cellulose dissolving in the manufacturing of a cellulose spinning dope wherein sodium hydroxide present in the spinning dope is at least partially recovered and recycled as sodium hydroxide from a cellulose fiber regeneration or cellulose coagulation step and wherein said cellulose fiber regeneration or cellulose coagulation step consists of a bath into which cellulose spinning dope is injected. Recovered sodium hydroxide may be directly or indirectly recycled from a cellulose fiber regeneration or cellulose coagulation step to a cellulose dissolving step.

公开(公告)号：US20220112628A1

公开(公告)日：2022-04-14

申请号：US17428687

申请日：2020-02-20

申请人： TREETOTEXTILE AB

发明人： Bengt Hagström ,  Tobias Köhnke ,  Jonas Engström

IPC分类号： D01D5/06 ,  D01D10/06 ,  D01D5/22 ,  D01F1/10 ,  D01F2/24

摘要： A process for forming a fiber tow, involves a wet spinning procedure comprising the steps of: dissolving cellulose pulp N in an alkaline aqueous solvent to form a cellulose spin dope composition, spinning the cellulose spin dope composition in a coagulation having a p H of more than 7.0, preferably a pH of at least 10, to produce a fiber tow, and passing the produced fiber tow through a sequence of consecutive stretching and washing steps in which the formed fiber tow is washed with a washing liquid by a counter-current flow washing procedure.

公开(公告)号：US11753482B2

公开(公告)日：2023-09-12

申请号：US17346293

申请日：2021-06-13

申请人： TREETOTEXTILE AB

发明人： Carina Olsson ,  Bengt Hagström ,  Tobias Köhnke

IPC分类号： B01F33/82 ,  C08B1/08 ,  C08B1/10 ,  C08B1/12 ,  C08B1/14 ,  D01D1/10 ,  D21H13/08 ,  C08B1/00 ,  D01D1/02 ,  D01F2/02 ,  C08J3/05 ,  C08K3/22

CPC分类号： C08B1/003 ,  B01F33/821 ,  C08J3/05 ,  D01D1/02 ,  D01F2/02 ,  C08K2003/2296

摘要： The present invention describes a method for the production of a spinning dope composition, said method comprising a homogenization involving vigorous mixing of a cellulosic pulp material in alkali solution, vigorous mixing implying supplying a power density to agitators used in the homogenization step of at least 150 kW/m3 (kW supplied to agitators per mixed unit of liquid volume), and thereafter a dissolution involving mixing of the cellulosic pulp material in the alkali solution to obtain a spinning dope composition, wherein the power density supplied to agitators used in the dissolution step is maximum 75 kW/m3 (kW supplied to agitators per mixed unit of liquid volume); and wherein the cellulosic pulp material in alkali solution is kept at a temperature of less than 0° C. during the homogenization and during at least part of the dissolution. The present invention is also directed to a system intended for the production of a spinning dope composition.

公开(公告)号：US12091469B2

公开(公告)日：2024-09-17

申请号：US18226465

申请日：2023-07-26

申请人： TREETOTEXTILE AB

发明人： Carina Olsson ,  Bengt Hagström ,  Tobias Köhnke

IPC分类号： B01F33/82 ,  B01F21/00 ,  C08B1/00 ,  C08B1/08 ,  C08J3/05 ,  C08K5/21 ,  C08L1/02 ,  D01D1/02 ,  D01D5/06 ,  D01F1/10 ,  D01F2/02 ,  D21H13/08 ,  C08K3/22

CPC分类号： C08B1/003 ,  B01F21/02 ,  B01F33/821 ,  C08J3/05 ,  D01D1/02 ,  D01F2/02 ,  C08K2003/2296 ,  D10B2201/22

摘要： The present disclosure describes a method for the production of a spinning dope composition, said method comprising a homogenization involving mixing a cellulosic pulp material in alkali solution, mixing implying supplying a power density to agitators used in the homogenization of at least 150 kW/m3 (KW supplied to agitators per mixed unit of liquid volume), and thereafter a dissolution involving mixing of the cellulosic pulp material in the alkali solution to obtain a spinning dope composition, wherein the power density supplied to agitators used in the dissolution step is maximum 75 kW/m3 (KW supplied to agitators per mixed unit of liquid volume); and wherein the cellulosic pulp material in alkali solution is kept at a temperature of less than 0° C. during the homogenization and during at least part of the dissolution. The present disclosure is also directed to a system intended for the production of a spinning dope composition.

公开(公告)号：US11299556B2

公开(公告)日：2022-04-12

申请号：US16093271

申请日：2017-04-12

申请人： TREETOTEXTILE AB

发明人： Carina Olsson ,  Bengt Hagström ,  Tobias Köhnke

IPC分类号： C08B1/00 ,  C08B1/08 ,  C08B9/00 ,  C08B9/04 ,  C08B9/06 ,  C08B15/06 ,  C08K3/02 ,  C08K5/21 ,  C08L1/02 ,  C08L1/22 ,  C08L97/02 ,  D01D5/06 ,  D01F1/10 ,  D01D1/02 ,  D01F2/02 ,  C08J3/05 ,  C08K3/22

摘要： The present invention describes a method for the production of a spinning dope composition, said method comprising a homogenization involving vigorous mixing of a cellulosic pulp material in alkali solution, vigorous mixing implying supplying a power density to agitators used in the homogenization step of at least 150 k W/m3 (k W supplied to agitators per mixed unit of liquid volume), and thereafter a dissolution involving mixing of the cellulosic pulp material in the alkali solution to obtain a spinning dope composition, wherein the power density supplied to agitators used in the dissolution step is maximum 75 k W/m3 (k W supplied to agitators per mixed unit of liquid volume); and wherein the cellulosic pulp material in alkali solution is kept at a temperature of less than 0° C. during the homogenization and during at least part of the dissolution. The present invention is also directed to a system intended for the production of a spinning dope composition.