WO2002020885A1 - Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden - Google Patents
Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden Download PDFInfo
- Publication number
- WO2002020885A1 WO2002020885A1 PCT/DE2000/003035 DE0003035W WO0220885A1 WO 2002020885 A1 WO2002020885 A1 WO 2002020885A1 DE 0003035 W DE0003035 W DE 0003035W WO 0220885 A1 WO0220885 A1 WO 0220885A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- cellulose
- kneading
- mixing
- reactor
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/003—Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/02—Preparation of spinning solutions
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
Definitions
- the invention relates to a method and a device for the continuous, one-step production of a homogeneous solution of cellulose in water-containing amine oxides from cellulose and aqueous amine oxides, preferably N-methylmorpholine-N-oxide (NMMO), at temperatures in the range from 50 to 130 ° C. Vacuum and water evaporation.
- NMMO N-methylmorpholine-N-oxide
- the dissolving of cellulose in amine oxides with a defined water content at temperatures above 70 ° C. is known (DRP 713 486; USP 3 447 939).
- the solving process is very slow.
- the dissolution is significantly accelerated if the cellulose is dispersed in aqueous NMMO and then the excess water is distilled off under vacuum and stirring at temperatures above 85 ° C. with simultaneous dissolution of the cellulose (GB 8 216 566).
- the homogeneity of the suspension can be improved by high consistency grinding.
- the suspension is transferred into a solution by means of a thin-film evaporator (EP 356 419) or in the shear field of a horizontal screw remover (DE 4 441 468). It is also known to continuously produce cellulose solutions by first dispersing the cellulose and aqueous NMMO in a horizontal twin-shaft kneader, metering the suspension continuously into a horizontal single-shaft kneader via an intermediate container and converting it to a solution under vacuum and water evaporation (A. Diener and G Raouzeos Chemical Fibers International 49 [1999] 3 pp. 40-42; DE 19 837 210).
- the object of the invention is to create a method and a device for the continuous, one-step production of a homogeneous solution of cellulose in water-containing amine oxides. That Cellulose and water-containing amine oxide, preferably NMMO, are continuously converted into a homogeneous cellulose solution in a device without explicit transport and metering of a suspension in one step and are supplied to the potential consumer in the shortest possible way.
- Cellulose and water-containing amine oxide preferably NMMO
- the solution quality is characterized by the particle content determined by means of laser diffraction and the size distribution of the particles, as described in detail in the literature (Ch. Michels and F. Meister Das Textil 51 [1997] 4 pp. 161-165; B. Kosan and Ch. Michels Chemical Fibers International 49 [1999] 3 pp. 50-54). It is expedient to try to express the particle content and the particle distribution in only one size, the so-called filter value. It is defined as the quotient of the maximum particle diameter X m and the logarithm of the number of particles N 10 in the size class 10 ⁇ m.
- the achieved solution state is described by the zero shear viscosity, the relaxation time and the relaxation time spectrum, which are easily accessible from rheological data.
- the methods are also described in detail in the literature (Ch. Michels, Das Textil 52 [1998] 1 pp. 3 -8)
- the cellulose or cellulose mixture is subjected to activation.
- This can be a hydrothermal (DD 298 789)
- part of the water-containing NMMO is replaced by diluents, such as e.g. ⁇ -aminocaprolactam, piperidone, pyrrolidone or polyvinylpyrrolidone methacrylate copolymer.
- diluents such as e.g. ⁇ -aminocaprolactam, piperidone, pyrrolidone or polyvinylpyrrolidone methacrylate copolymer.
- additives are metered in simultaneously with the cellulose or the water-containing amine oxide.
- the additives such as cellulose derivatives, starch, starch derivatives, titanium dioxide, silicates, kaolin, carbon black, chitosan, surfactants, polyethyleneimine, etc. can be solid, liquid and / or soluble in amine oxide. Insoluble, solid additives are advantageously mixed with the cellulose or dosed separately.
- the object is further achieved according to the invention in the device mentioned at the outset by providing a screw conveyor with a twin- or multi-shaft kneading / mixing reactor with at least two heating / cooling zones and a speed-controlled drive unit, a vacuum station, two or more vacuum-tight metering units assigned as a discharge unit, a safety filter, two feed pumps and a potential consumer.
- a kneading / mixing reactor is expediently used as a horizontal twin-shaft co-rotating processor (LIST AG Arisdorf Switzerland) with two heating / cooling zones and a freely selectable shaft speed for setting the required shear field.
- the kneading / mixing shafts of the reactor rotate in the same direction.
- the first heating / cooling zone is a control piston pump for dosing water-containing cellulose, a heated pump with a controllable control valve for dosing the water-containing NMMO and
- a vacuum station consisting of a vacuum pump (s) and a condensation unit, supplies the kneading / mixing reactor with the vacuum required to remove the water.
- a large-volume, vertical twin-screw unit separates the kneading / mixing reactor on the vacuum side, takes over the promotion of the solution and at the same time serves as a buffer to compensate for fluctuations in the potential consumer's consumption.
- the twin-screw unit is one between two pumps Pumps and safety filters are designed in such a way that a shear rate of 5 [1 / s] is not exceeded differ.
- an “opposing rotating processor” is used as the kneading / mixing reactor, ie the kneading / mixing shafts of the reactor rotate in opposite directions.
- the invention is explained in more detail with reference to drawings and examples Device according to the invention consisting of the kneading / mixing reactor 1 with the heating / cooling zones 1.1 and 1.2 and drive unit 1.3, the vacuum station 2, the metering units 3 4 5, the screw conveyor 6, the safety filter 7, the feed pumps 8 9 and the consumer 10th
- 364 g / min which have been crushed, enzymatically pretreated and stabilized cellulose (Cuoxam
- the gel is converted into a solution, which is then taken up by the vertical twin-screw conveyor, further homogenized and fed to the precision gear pump.
- this conveys 1334 ml / min solution through a safety filter with a mesh size of 15 ⁇ m to the second pump, which feeds the same amount of solution to the consumer in a fiber test spinning system.
- the pressure difference in the safety filter was zero even after many hours of operation.
- the solution had a composition of 12.0 mass% cellulose, 76.3 mass% NMMO and 11.7 mass% water.
- the index ⁇ is intended to indicate that the non-uniformity results from rheological data and not from the determination of the number and mass average of the molar mass.
- the solution has a relaxation time spectrum as shown in FIG. 2 and a particle distribution determined by laser diffraction as shown in FIG. 3.
- the particle content is 4.7 ⁇ l / kg solution
- the particle diameter at the maximum frequency is 6.6 ⁇ m
- the maximum particle diameter is 16.5 ⁇ m
- the filter value was calculated to be 28.
- Example 2 the procedure is essentially the same as in example 1, except that the mixing / kneading reactor used is an approximately the same size "Opposite Rotating Processor type LIST-ORP Conti" and the residence time in the reactor is 1.5 times higher Solution state largely corresponds to that of the solution in Example 1.
- Example 3 The kneading / mixing reactor differs from that in Example 1 in that 3 components can be metered in separately in the first shear zone.
- Polyvinyl pyrrolidone (PVP product VP-MA91 W from BASF Ludwigshafen), which also contains 0.5 mass% titanium dioxide. With shear and an applied vacuum of 140 mbar, intensive mixing and distillation of approx. 260 are carried out
- Example 4 the procedure is analogous to Example 3, with the difference that a single-shaft, horizontal "List Discotherm B-Conti" is used as the mixing / kneading reactor. Instead of the polyvinyl-pyrrolidone copolymer, the same amount of preheated ⁇ -aminocaprolactam is added. The residence time is double and the solution quality largely corresponds to the solution in Example 3.
- the bright yellow solution that forms in the second shear zone is simultaneously cooled to 80 ° C, taken over by the screw conveyor and fed to the consumer, a fiber spinning system, in an amount of 1300 g / min via pumps and safety filters.
- the solution consists of 13.6 mass% cellulose, 2.7 mass% polyethyleneimine, 73.0 mass% NMMO and 10.7 mass% water.
- the zero shear viscosity at 85 ° C is 5100 Pas, the relaxation time at the maximum frequency 1.7 seconds, the particle content 5.2 ⁇ l / kg solution, the particle diameter at the maximum frequency 9.5 ⁇ m and the filter value 45.
- a "co-rotating processor type" serves as the kneading / mixing reactor
- LIST-CRP 250 Conti "with a drive unit for the speed range of 80-120 rpm, 2 heating / cooling zones, and 2 metering nozzles.
- 924 g / min crushed and enzymatically pretreated cellulose Eucalyptus pulp Cuoxam DP 580, non-uniformity 5.9, water content 45 mass%) and 3673 g / min NMMO (water content 45 mass%) metered into the second nozzle, in the first shear zone under vacuum of 160 mbar, intensive mixing and kneading heating the suspension to 120 ° C with simultaneous evaporation of 533 g / min of water until the transition to the gel state
- a homogeneous solution is created, which is taken over by a vertical twin-screw conveyor and via two pumps and a safety filter is supplied to the consumer in an amount of 3474 ml / min.
- the solution consisted of 12.5 mass% cellulose, 75.9 mass% NMMO and 11.6 mass% water, their zero shear
- the viscosity was 6760 Pas, the relaxation time at the maximum of 6.3 seconds, the particle content 8.4 ⁇ l / kg of solution, the particle diameter at the maximum of 8.1 ⁇ m and the filter value 32.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN00819870.5A CN1211508C (zh) | 2000-09-05 | 2000-09-05 | 单级连续生产含水叔胺氧化物中的纤维素均相溶液的方法和设备 |
US10/363,192 US6875756B1 (en) | 2000-09-05 | 2000-09-05 | Method and device for the continuous, single-step production of a homogeneous solution of cellulose in hydrous tertiary aminoxides |
EP00972575A EP1315855A1 (de) | 2000-09-05 | 2000-09-05 | Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden |
PCT/DE2000/003035 WO2002020885A1 (de) | 2000-09-05 | 2000-09-05 | Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden |
CA002427478A CA2427478A1 (en) | 2000-09-05 | 2000-09-05 | Method and device for the continuous, single-step production of a homogeneous solution of cellulose in hydrous tertiary aminoxides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2000/003035 WO2002020885A1 (de) | 2000-09-05 | 2000-09-05 | Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002020885A1 true WO2002020885A1 (de) | 2002-03-14 |
Family
ID=5647887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/003035 WO2002020885A1 (de) | 2000-09-05 | 2000-09-05 | Verfahren und vorrichtung zur kontinuierlichen, einstufigen herstellung einer homogenen lösung von cellulose in wasserhaltigen tertiären aminoxiden |
Country Status (5)
Country | Link |
---|---|
US (1) | US6875756B1 (de) |
EP (1) | EP1315855A1 (de) |
CN (1) | CN1211508C (de) |
CA (1) | CA2427478A1 (de) |
WO (1) | WO2002020885A1 (de) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008009273A1 (de) * | 2006-07-18 | 2008-01-24 | Thüringisches Institut Für Textil- Und Kunstsstoff-Forschung E.V. | Verfahren zur stabilisierung der spinnlösung bei der herstellung von cellulosischen verbundformkörpern |
WO2009098073A1 (de) | 2008-02-08 | 2009-08-13 | List Holding Ag | Verfahren und vorrichtung zur herstellung von formkörpern |
DE102008008342A1 (de) | 2008-02-08 | 2009-08-20 | List Holding Ag | Verfahren und Vorrichtung zur Herstellung von Formkörpern aus nachwachsenden Rohstoffen |
DE102008023064A1 (de) | 2008-05-09 | 2009-11-12 | List Holding Ag | Verfahren und Vorrichtung zur Herstellung von Formförpern |
WO2010089137A3 (de) * | 2009-02-05 | 2011-03-17 | List Holding Ag | Thermische trennung von stoffgemischen durch eine hauptverdampfung und eine entgasung in separaten mischknetern |
WO2011124387A1 (de) | 2010-04-08 | 2011-10-13 | List Holding Ag | Verfahren zur herstellung eines produktes |
DE102010014298A1 (de) | 2010-04-08 | 2011-10-13 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
WO2011154134A1 (de) | 2010-06-11 | 2011-12-15 | List Holding Ag | Verfahren zur herstellung eines produktes |
AT511624A1 (de) * | 2011-07-13 | 2013-01-15 | Chemiefaser Lenzing Ag | Cellulose ii suspension, deren herstellung und daraus gebildete strukturen |
DE102012103296A1 (de) | 2012-04-17 | 2013-10-17 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
WO2015049040A1 (de) | 2013-10-04 | 2015-04-09 | List Holding Ag | Verfahren zur herstellung von formkörpern |
DE102013111026A1 (de) | 2013-10-04 | 2015-04-09 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
DE102014109786A1 (de) | 2014-07-11 | 2016-01-14 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
Families Citing this family (5)
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DE10145640A1 (de) * | 2001-09-15 | 2003-04-10 | Thueringisches Inst Textil | Verfahren und Vorrichtung zur Herstellung gerader keramischer Fasern |
DE102004048875A1 (de) * | 2004-10-07 | 2006-04-13 | Bayer Materialscience Ag | Verfahren zur Herstellung von cyclischen Ketonen |
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CN105418943B (zh) * | 2015-11-19 | 2018-10-19 | 南京林业大学 | 一种木质纤维素的溶解方法 |
CN111676525B (zh) * | 2020-06-19 | 2024-09-06 | 当阳市鸿阳新材料科技有限公司 | 一种Lyocell纺丝中提高丝束白度的温控系统及方法 |
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WO1994006530A1 (en) * | 1992-09-17 | 1994-03-31 | Courtaulds Fibres (Holdings) Limited | Forming solutions |
WO1996021678A1 (en) * | 1995-01-10 | 1996-07-18 | Courtaulds Fibres (Holdings) Limited | Forming solutions of cellulose in aqueous tertiary amine oxide |
WO1996030410A1 (de) * | 1995-03-31 | 1996-10-03 | Akzo Nobel N.V. | Verfahren zur herstellung von celluloselösungen in wasserhaltigen tertiären amin-n-oxiden |
WO1996033221A1 (de) * | 1995-04-19 | 1996-10-24 | Lenzing Aktiengesellschaft | Verfahren zur herstellung einer cellulosesuspension |
Family Cites Families (3)
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DE4439149C2 (de) * | 1994-11-03 | 1997-07-31 | Thueringisches Inst Textil | Verfahren zur Herstellung einer homogenen Celluloselösung |
WO1997047790A1 (en) * | 1996-06-10 | 1997-12-18 | Korea Institute Of Science And Technology | Process for preparing a homogeneous cellulose solution using n-methylmorpholine-n-oxide |
US5769335A (en) * | 1997-01-31 | 1998-06-23 | Tennessee Technological University | Method and apparatus for shear pulverization of polymer materials |
-
2000
- 2000-09-05 US US10/363,192 patent/US6875756B1/en not_active Expired - Fee Related
- 2000-09-05 CA CA002427478A patent/CA2427478A1/en not_active Abandoned
- 2000-09-05 WO PCT/DE2000/003035 patent/WO2002020885A1/de active Application Filing
- 2000-09-05 EP EP00972575A patent/EP1315855A1/de not_active Withdrawn
- 2000-09-05 CN CN00819870.5A patent/CN1211508C/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1994006530A1 (en) * | 1992-09-17 | 1994-03-31 | Courtaulds Fibres (Holdings) Limited | Forming solutions |
WO1996021678A1 (en) * | 1995-01-10 | 1996-07-18 | Courtaulds Fibres (Holdings) Limited | Forming solutions of cellulose in aqueous tertiary amine oxide |
WO1996030410A1 (de) * | 1995-03-31 | 1996-10-03 | Akzo Nobel N.V. | Verfahren zur herstellung von celluloselösungen in wasserhaltigen tertiären amin-n-oxiden |
WO1996033221A1 (de) * | 1995-04-19 | 1996-10-24 | Lenzing Aktiengesellschaft | Verfahren zur herstellung einer cellulosesuspension |
Cited By (22)
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WO2008009273A1 (de) * | 2006-07-18 | 2008-01-24 | Thüringisches Institut Für Textil- Und Kunstsstoff-Forschung E.V. | Verfahren zur stabilisierung der spinnlösung bei der herstellung von cellulosischen verbundformkörpern |
DE102006033591B4 (de) * | 2006-07-18 | 2008-10-16 | Thüringisches Institut für Textil- und Kunststoff-Forschung e.V. | Verfahren zur Stabilisierung der Spinnlösung bei der Herstellung von cellulosischen Verbundformkörpern |
WO2009098073A1 (de) | 2008-02-08 | 2009-08-13 | List Holding Ag | Verfahren und vorrichtung zur herstellung von formkörpern |
DE102008008342A1 (de) | 2008-02-08 | 2009-08-20 | List Holding Ag | Verfahren und Vorrichtung zur Herstellung von Formkörpern aus nachwachsenden Rohstoffen |
US9206528B2 (en) | 2008-02-08 | 2015-12-08 | List Holding Ag | Method and device for the production of molded bodies |
DE102008023064A1 (de) | 2008-05-09 | 2009-11-12 | List Holding Ag | Verfahren und Vorrichtung zur Herstellung von Formförpern |
EP2774665A1 (de) * | 2009-02-05 | 2014-09-10 | LIST Holding AG | Verfahren zur kontinuierlichen Behandlung von Polymerlösungen |
US8519093B2 (en) | 2009-02-05 | 2013-08-27 | List Holding Ag | Process and a device for the continuous treatment of mixed substances |
WO2010089137A3 (de) * | 2009-02-05 | 2011-03-17 | List Holding Ag | Thermische trennung von stoffgemischen durch eine hauptverdampfung und eine entgasung in separaten mischknetern |
EP2774666A1 (de) * | 2009-02-05 | 2014-09-10 | LIST Holding AG | Steuerung eines Mischkneterns |
WO2011124387A1 (de) | 2010-04-08 | 2011-10-13 | List Holding Ag | Verfahren zur herstellung eines produktes |
DE102010014298A1 (de) | 2010-04-08 | 2011-10-13 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
WO2011154134A1 (de) | 2010-06-11 | 2011-12-15 | List Holding Ag | Verfahren zur herstellung eines produktes |
DE102010037530A1 (de) | 2010-06-11 | 2011-12-15 | List Holding Ag | Verfahren zur Herstellung eines Produktes |
AT511624A1 (de) * | 2011-07-13 | 2013-01-15 | Chemiefaser Lenzing Ag | Cellulose ii suspension, deren herstellung und daraus gebildete strukturen |
AT511624B1 (de) * | 2011-07-13 | 2014-02-15 | Chemiefaser Lenzing Ag | Cellulose ii suspension, deren herstellung und daraus gebildete strukturen |
WO2013156489A1 (de) | 2012-04-17 | 2013-10-24 | List Holding Ag | Verfahren zur herstellung von formkörpern |
DE102012103296A1 (de) | 2012-04-17 | 2013-10-17 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
US10357725B2 (en) | 2012-04-17 | 2019-07-23 | List Holding Ag | Method for producing moulded articles |
WO2015049040A1 (de) | 2013-10-04 | 2015-04-09 | List Holding Ag | Verfahren zur herstellung von formkörpern |
DE102013111026A1 (de) | 2013-10-04 | 2015-04-09 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
DE102014109786A1 (de) | 2014-07-11 | 2016-01-14 | List Holding Ag | Verfahren zur Herstellung von Formkörpern |
Also Published As
Publication number | Publication date |
---|---|
US6875756B1 (en) | 2005-04-05 |
CN1211508C (zh) | 2005-07-20 |
EP1315855A1 (de) | 2003-06-04 |
CN1454267A (zh) | 2003-11-05 |
CA2427478A1 (en) | 2003-03-04 |
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