专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2020171767A1 A PROCESS AND A SPINNING LINE UNIT FOR WET SPINNING OF CELLULOSE FIBERS FROM AN ALKALINE SPIN BATH 审中-公开
公开(公告)号：WO2020171767A1
公开(公告)日：2020-08-27
申请号：PCT/SE2020/050198
申请日：2020-02-20
申请人： TREETOTEXTILE AB
发明人： HAGSTRÖM, Bengt , KÖHNKE, Tobias , ENGSTRÖM, Jonas
IPC分类号： D01F2/02 , C08B16/00 , D01D5/06 , D01F1/10
摘要： A process for forming a fiber tow, involves a wet spinning procedure comprising the steps of: dissolving cellulose pulp in an alkaline aqueous solvent to form a cellulose spin dope composition, spinning the cellulose spin dope composition in a coagulation bath 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.

2. 发明申请

WO2020251463A1 FIBERS PRODUCED FROM RECYCLED CELLULOSIC WASTE MATERIAL 审中-公开
公开(公告)号：WO2020251463A1
公开(公告)日：2020-12-17
申请号：PCT/SE2020/050599
申请日：2020-06-10
申请人： TREETOTEXTILE AB
发明人： STIGSSON, Lars
IPC分类号： D01F13/02 , C08B16/00 , D01F2/02 , C08B1/00 , C08L1/02 , D01D5/06 , D21C3/02
摘要： The present invention relates to a process for the production of regenerated cellulosic fibers from a cellulosic spin dope, said process comprising the steps of treating a recycled cellulosic waste material to remove at least one of lignin, hemicelluloses, and contaminants from the recycled cellulosic waste material thereby providing a purified cellulosic intermediate product, dissolving the purified cellulosic intermediate product in an alkaline liquor to form a cellulosic spin dope, injecting the cellulosic spin dope into a coagulation bath to form a tow, washing and stretching the tow under alkaline conditions and/or acidic conditions, and cutting the tow to form regenerated cellulosic fibers.

3. 发明申请

WO2018169479A1 REGENERATED CELLULOSIC FIBRES SPUN FROM AN AQUEOUS ALKALINE SPINDOPE 审中-公开
公开(公告)号：WO2018169479A1
公开(公告)日：2018-09-20
申请号：PCT/SE2018/050256
申请日：2018-03-15
申请人： TREETOTEXTILE AB
发明人： STIGSSON, Lars
IPC分类号： C08B16/00 , C08B15/06 , D01F2/02 , C08B1/00 , D01F2/24
摘要： The present invention is directed to a cellulosic fibre composition comprising regenerated cellulose and one or more additives, wherein a) the cellulosic fibre composition is produced by injecting an aqueous alkaline spindope solution or suspension comprising dissolved cellulose in a concentration from about 5 % to about 12 % by weight of spindope and at least one of an additive and a nano-sized structured particulate filler through a nozzle into an alkaline coagulation bath forming cellulosic filaments; and b) stretching or washing cellulosic filaments from a) in one or more stretching and washing baths forming a regenerated cellulosic fibre.

4. 发明申请

WO2023281058A1 A METHOD FOR PROVIDING A FILTERED SPINNING DOPE 审中-公开
公开(公告)号：WO2023281058A1
公开(公告)日：2023-01-12
申请号：PCT/EP2022/069071
申请日：2022-07-08
申请人： TREETOTEXTILE AB
发明人： HEDLUND, Artur
IPC分类号： D01D5/06 , D01F2/00 , D01F2/02 , D01F2/08 , D01F13/02 , C08B1/00 , D01D1/02 , C08H8/00 , C08L1/02 , C01D1/28 , C08B16/00
摘要： The present invention describes a method of dissolving cellulose, said method comprising: dissolving cellulose in an alkali solution;-filtering the dissolved cellulose, thereby forming a filtered dissolved cellulose solution and a filter reject;- mixing said filter reject having a first viscosity value with a dissolution liquid having a second viscosity value, wherein the second viscosity value is lower than the first viscosity value, to provide a diluted reject stream having a third viscosity value being lower than the first viscosity value of the filter reject;and- separating inhomogeneities from the diluted reject stream.

5. 发明申请

WO2021211046A1 PROCESS FOR THE RECOVERY AND RECYCLE OF CHEMICALS IN A REGENERATED CELLULOSE FIBER PROCESS 审中-公开
公开(公告)号：WO2021211046A1
公开(公告)日：2021-10-21
申请号：PCT/SE2021/050349
申请日：2021-04-16
申请人： TREETOTEXTILE AB
发明人： STIGSSON, Lars
IPC分类号： D01F13/02 , D01F2/02 , B01D61/42 , C25B1/16 , C25B1/22
摘要： The present invention relates to a process for the recovery and recycle of spinning chemicals for spinning regenerated cellulosic fibers using alkaline cellulose solvents for dissolution of cellulose, said process being characterized by that spinning and/or fiber washing chemicals are treated by electrolysis of sodium sulfate therein, forming one stream comprising sodium hydroxide and one stream comprising sulfuric acid, and wherein at least part of the formed sodium hydroxide is used for pre-treatment of cellulose for adjustment of intrinsic viscosity of the cellulose, and/or as an aid in removal of hemicellulose from cellulose and/or for dissolving cellulose in a sodium hydroxide solvent, and/or wherein at least part of the formed sulfuric acid is used in one or more steps of the fiber washing, and/or in the cellulose spinning and/or for fiber regeneration.

6. 发明申请

WO2017178531A1 A METHOD AND SYSTEM FOR THE PRODUCTION OF A SPINNING DOPE COPOSITION 审中-公开
标题翻译：生产纺丝DOPE复合物的方法和系统
公开(公告)号：WO2017178531A1
公开(公告)日：2017-10-19
申请号：PCT/EP2017/058785
申请日：2017-04-12
申请人： TREETOTEXTILE AB
发明人： OLSSON, Carina , HAGSTRÖM, Bengt , KÖHNKE, Tobias
IPC分类号： D01D1/02 , D01F2/02 , C08B1/00 , C08J3/05
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/m 3 (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/m 3 (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 0º 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.
摘要翻译：本发明描述了用于生产纺丝液组合物的方法，所述方法包括将纤维素纸浆材料在碱溶液中剧烈混合的均质化，剧烈混合，意味着向所使用的搅拌器提供功率密度在匀化步骤中至少150kW / m 3（kW以液体体积的每个混合单位供应到搅拌器），然后进行涉及纤维素纸浆材料在碱溶液中混合的溶解以及获得纺丝原液组合物，其中供给到溶解步骤中使用的搅拌器的功率密度最大为75kW / m 3（kW，以每个混合液体体积单位供应到搅拌器）; 并且其中碱溶液中的纤维素纸浆材料保持在小于0℃的温度; C在均化期间和至少部分溶解期间。本发明还涉及用于生产纺丝原液组合物的系统。

7. 发明申请

WO2023280779A1 PROCESS FOR SPINNING ALKALINE CELLULOSE SPIN DOPE 审中-公开
公开(公告)号：WO2023280779A1
公开(公告)日：2023-01-12
申请号：PCT/EP2022/068459
申请日：2022-07-04
申请人： TREETOTEXTILE AB
发明人： HEDLUND, Artur , HAGSTRÖM, Bengt
IPC分类号： D01D4/02 , D01D5/06 , D01F2/00 , D01F2/02 , D01D1/02
摘要： Disclosed is a process for spinning an alkaline cellulose spin dope, comprising dissolved cellulose, to cellulose filaments (10). The process comprising the steps of: - feeding the alkaline cellulose spin dope to at least one spinning head (20) with a plurality of holes (21), wherein the spinning head (20) comprises at least two parallel, rectangular spinneret dies (22), each with a plurality of holes (21), the spinneret dies (22) being arranged spaced apart with a flow spacing (23) in between them; - extruding the alkaline cellulose spin dope through the plurality of holes (21) into a flow (35) of aqueous alkaline coagulation bath liquid, the aqueous alkaline coagulation bath liquid comprising a sodium coagulation salt, whereby forming cellulose filaments (10), wherein the aqueous alkaline coagulation bath liquid flows through the flow spacing (23) and then past the spinneret dies (22) in a flow direction, the flow direction of the aqueous alkaline coagulation bath liquid being parallel to the direction in which the alkaline cellulose spin dope is extruded into the aqueous alkaline coagulation bath liquid; and - withdrawing the cellulose filaments (10) from the aqueous alkaline coagulation bath liquid.

8. 发明申请

WO2023280778A1 METHOD OF SPINNING ALKALI CELLULOSE 审中-公开
公开(公告)号：WO2023280778A1
公开(公告)日：2023-01-12
申请号：PCT/EP2022/068458
申请日：2022-07-04
申请人： TREETOTEXTILE AB
发明人： HEDLUND, Artur , HAGSTRÖM, Bengt
IPC分类号： D01D4/02 , D01D5/06 , D01F2/00 , D01F2/02 , D01D1/02
摘要： A process for spinning an alkaline cellulose spin dope, comprising dissolved cellulose, into an aqueous alkaline coagulation bath liquid, comprising a coagulation salt, whereby forming cellulose filaments. The process comprising the steps of: - feeding the alkaline cellulose spin dope to a spinneret die (110) with a plurality of holes (120) arranged in at least one group (130) such that the distance (D1) from the center of any given hole (120) in the group (130) to the closest point on the perimeter (131) of the group (130) does not exceed 3 mm, such as 2 mm, the diameter of each hole (120) being 40 to 100 µm; - extruding the alkaline cellulose spin dope through the holes (120) into the aqueous alkaline coagulation bath liquid, whereby forming cellulose filaments; and - withdrawing the cellulose filaments from the aqueous alkaline coagulation bath liquid; wherein holes (121) at the perimeter (131) of the group (130) is in direct contact with aqueous alkaline coagulation bath liquid.

9. 发明申请

WO2022112425A1 A PROCESS FOR PROVIDING AN ALKALINE CELLULOSE SPIN DOPE 审中-公开
公开(公告)号：WO2022112425A1
公开(公告)日：2022-06-02
申请号：PCT/EP2021/083020
申请日：2021-11-25
申请人： TREETOTEXTILE AB
发明人： ÖSTLUND, Åsa , GRUNDBERG, Hans , VIIKILÄ, Matti
IPC分类号： C08B16/00 , C08B1/08 , C08B1/00
摘要： A process for providing an alkaline cellulose spin dope (50) for extrusion into fiber spinning, film forming, or three-dimensional structures. The process comprises the steps of: - dispersing (71) cellulose (20) in a first aqueous sodium hydroxide solution (10) comprising 4 to 10 % by weight of sodium hydroxide, such as 5 to 8 % by weight of sodium hydroxide, to form a dispersion of cellulose; - heating (74) the dispersion of cellulose to a temperature of more than 100°C, such as 101 to 125°C, or 105 to 115°C, to partly degrade the cellulose, in a heating step; preferably the residence time in the heating step being 5 to 90 minutes, such as 7.5 to 60 minutes, or 5 to less than 30 minutes; and - dissolving (77) the heat-treated cellulose in a second aqueous sodium hydroxide solution (11) comprising 5 to 12 % by weight of sodium hydroxide, such as 6 to 10 % by weight of sodium hydroxide, the second aqueous sodium hydroxide solution (111) having a temperature of +12°C or lower, such as -20°C to +10°C, -10°C to +5°C, or -5°C to +5°C, to provide an alkaline cellulose spin dope (50).

10. 发明申请

WO2017178532A1 PROCESS FOR SPINNING DISSOLVED CELLULOSE 审中-公开
标题翻译：纺制溶解纤维素的方法
公开(公告)号：WO2017178532A1
公开(公告)日：2017-10-19
申请号：PCT/EP2017/058786
申请日：2017-04-12
申请人： TREETOTEXTILE AB
发明人： HEDLUND, Artur , KÖHNKE, Tobias
IPC分类号： D01F2/02 , D01F13/02 , C08B1/00
摘要： The present invention relates to a process for forming cellulose fibers or film from dissolved cellulose. The process comprises the steps of: dissolving cellulose in an aqueous coagulation sodium salt solution to provide a cellulose spin dope; extruding the cellulose spin dope into a coagulation bath liquid comprising an aqueous coagulation sodium salt solution to provide cellulose fibers or film; withdrawing a portion of the coagulation bath comprising coagulation sodium salt and sodium hydroxide (NaOH); cooling the withdrawn portion of the coagulation bath to precipitate solid coagulation sodium salt to recover sodium hydroxide (NaOH) substantially free from the coagulation salt; and using at least a portion of the recovered sodium hydroxide (NaOH) in dissolving the cellulose to provide the cellulose spin dope.
摘要翻译：本发明涉及由溶解的纤维素形成纤维素纤维或薄膜的方法。该方法包括以下步骤：将纤维素溶解在含水凝固钠盐溶液中以提供纤维素纺丝原液; 将纤维素纺丝原液挤入包含含水凝固钠盐溶液的凝固浴液中以提供纤维素纤维或薄膜; 取出包含凝固钠盐和氢氧化钠（NaOH）的一部分凝固浴; 冷却凝固浴的回收部分以沉淀固体凝固钠盐以回收基本上不含凝结盐的氢氧化钠（NaOH）; 并使用至少一部分回收的氢氧化钠（NaOH）溶解纤维素以提供纤维素纺丝原液。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式