EP2929071A1 - Verfahren zur herstellung eines cellulosischen formkörpers - Google Patents
Verfahren zur herstellung eines cellulosischen formkörpersInfo
- Publication number
- EP2929071A1 EP2929071A1 EP13801568.0A EP13801568A EP2929071A1 EP 2929071 A1 EP2929071 A1 EP 2929071A1 EP 13801568 A EP13801568 A EP 13801568A EP 2929071 A1 EP2929071 A1 EP 2929071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- xylan
- molecular weight
- cellulose
- pulp
- added
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229920001221 xylan Polymers 0.000 claims abstract description 137
- 150000004823 xylans Chemical class 0.000 claims abstract description 134
- 229920000297 Rayon Polymers 0.000 claims abstract description 56
- 229920002678 cellulose Polymers 0.000 claims abstract description 39
- 239000001913 cellulose Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000012991 xanthate Substances 0.000 claims abstract description 24
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract 2
- 239000000835 fiber Substances 0.000 claims description 73
- 229920002488 Hemicellulose Polymers 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 239000003518 caustics Substances 0.000 claims description 6
- 239000012670 alkaline solution Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- -1 xanthate xylan Chemical class 0.000 claims description 2
- 238000009987 spinning Methods 0.000 abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 19
- 238000009826 distribution Methods 0.000 description 16
- 238000001542 size-exclusion chromatography Methods 0.000 description 8
- 239000003513 alkali Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 241001070947 Fagus Species 0.000 description 5
- 235000010099 Fagus sylvatica Nutrition 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Inorganic materials [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000001143 conditioned effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 3
- 206010036590 Premature baby Diseases 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 244000166124 Eucalyptus globulus Species 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005571 anion exchange chromatography Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 238000000569 multi-angle light scattering Methods 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- 229920000057 Mannan Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000012465 retentate Substances 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
-
- 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
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
Definitions
- the invention relates to a process for producing cellulosic shaped bodies by the viscose process.
- the invention relates to the production of fibers and filaments.
- the production of viscose fibers by the viscose process comprises the following steps
- alkali cellulose Reacting the alkalized cellulose starting material
- the pulp used in the viscose process must meet certain criteria to allow appropriate fiber qualities.
- the pulp used in the viscose process has an alpha-cellulose content of greater than 90% and has only low levels of secondary compounds, such as xylan and others
- Hemicelluloses such as mannan
- These compounds are for the most part degraded and leached out during the alkalization of the pulp at the beginning of the viscose process (FIG. 1).
- Hemicelluloses remaining in the pulp are depolymerized in pre-maturity together with the cellulose and therefore have a much lower content average molecular weight than in the starting pulp. This applies both to the use of chemical pulps and to the use of paper pulps.
- WO 95/00698 describes a process in which, during the production of Kraft pulp, initially a substantial amount of hemicellulose is removed from the production flow and is deposited again on the pulp in a later stage.
- US Pat. No. 7,390,566 B2 and WO 2007/128026 disclose the use of pulp with a relatively high proportion of xylan for producing viscose fibers.
- the use of hemicellulose-rich pulp for the production of lyocell fibers is known from WO 99/47733 A1 and WO 01/88236 A2.
- WO 2005/118950 describes the separation of beta-cellulose from lye obtained by pressing after a cold or hot alkaline extraction (CCE, HCE) of a pulp.
- the object of the present invention is in one aspect by a method for producing a cellulosic molded body by the viscose method
- a spinning mass containing cellulose xanthate dissolved which is characterized in that the cellulose xanthate xylan in a proportion of at least 1 wt.%, Based on cellulose, preferably 1 wt.% To 20 wt.%, Particularly preferably 3 wt.% To 15 wt .% is added.
- the invention relates to a obtained by the viscose cellulosic molding with a proportion of high molecular weight xylan with an average degree of polymerization (DP) of from 75 to 350, preferably from 110 to 220, of at least 0.5% by weight, based on cellulose, preferably from 2% by weight to 8% by weight.
- DP average degree of polymerization
- FIG. 1 shows the degradation of low-molecular constituents in the viscose process.
- FIG. 2 shows the molecular mass distributions of high-molecular hemicelluloses
- Figure 3 shows fiber strengths of viscose fibers having an increased content
- FIG. 4 shows the evolution of the water retention capacity (WRV) of viscose fibers by the addition of high molecular weight xylan in the solution liquor
- FIG. 5 shows the molecular weight distribution of xylan precipitated after CCE treatment of a eucalyptus kraft pulp and the molecular weight distribution of a viscose fiber after addition of this high molecular weight xylan.
- FIG. 6 shows the molecular weight distribution of a viscose fiber with a proportion of 4.8% high molecular weight xylan and its molecular weight distribution after mathematical removal of the high molecular weight xylan content.
- Cellulose molding can be achieved.
- the xylan is added to the cellulose xanthate according to the invention.
- the xylan is preferably added in the form of an alkaline solution.
- the alkaline solution may have a xylan content of 1 to 60 g / l.
- the xylan can be added to the cellulose xanthate as a constituent of an alkaline solution.
- an alkaline solution is known to be used.
- the xylan to be added.
- the xylan originates from a pressing liquor produced during the pressing off of alkalized pulp at the beginning of the viscose process.
- the xylan originates from a pressing liquor produced during the pressing off of alkalized pulp at the beginning of the viscose process.
- the pulp is alkalized at the beginning of the viscose process.
- an alkaline press liquor is obtained which contains a high proportion of xylan dissolved out by alkalization from the pulp.
- this press liquor is used as the dissolving liquor to dissolve the cellulose xanthogenate, the xylan previously dissolved out of the pulp is returned to the process, thus increasing its yield.
- This xylan is relatively low molecular weight.
- One skilled in the art would expect that addition of low molecular weight xylan would adversely affect the strength properties of the resulting fiber.
- At least a portion of the added xylan is a high molecular weight xylan having an average degree of polymerization (DP) of 75 to 350, preferably 110 to 220.
- DP average degree of polymerization
- the xylan derived from the caustic liquor of the alkalization of the pulp by the viscose process is comparatively low in molecular weight during the degradation in the alkalization (see FIG. 2). It has been shown that viscose fibers by adding such low molecular weight xylans in their properties such as strength and elongation do not fall behind conventional viscose fibers.
- the high molecular weight xylan is added in a proportion of 1% to 20%, preferably 3% to 15%, based on cellulose.
- the high molecular weight xylan may preferably originate from a hemicellulose-rich material stream obtained in the course of an extraction step in the production of a pulp.
- press liquor obtained by pressing off the pulp after extraction is removed by appropriate methods, e.g. Membrane filtration as in WO 2005/118050,
- This liquor may e.g. be added again directly as L educatelauge or as part of the cellulose xanthate.
- the present invention also relates to a cellulosic molded body obtained by the viscose process with a high molecular weight xylan content having an average degree of polymerization (DP) of 75 to 350, preferably 110 to 220, of at least 0.5% based on cellulose, preferably 2% to 8 %.
- DP average degree of polymerization
- the molding according to the invention is new, since - without the fiction, according to the proposed addition of high molecular weight xylan to cellulose xanthate - in the conventional viscose process due to the degradation and leaching of xylan no
- the cellulosic shaped body according to the invention is preferably in the form of a fiber, e.g. Staple fiber or filament fiber.
- the invention also relates to the use of fiction, contemporary cellulosic
- Shaped body in absorbent products is
- the manufacturing process follows the conventional viscose process.
- the solution solution used is a pure alkali which has been enriched with xylan or an alkali which already contains xylan.
- the lye may contain low molecular weight and / or high molecular weight xylans.
- the lye can be added together with a possibly also used dissolving water.
- Figure 2 shows the molecular weight distribution of high molecular weight xylan as prepared from a CCE liquor from coniferous or hardwood pulps. It can be clearly seen that the xylan obtained after application of a CCE stage has a much higher average molecular weight than the xylan already degraded in the mash of the viscose process.
- the xylan was added to the xanthate from a conventional beech sulfite pulp and therefore was not present during the sulfidation, but only in the subsequent process step, the dissolution of the xanthate.
- the xylan is thus not xanthogenated, but dissolved in NaOH.
- the fibers were spun out in the laboratory. Fibers were thus produced with a significantly higher content of xylan (see Table 2 below).
- a pulp (beech sulfite pulp) was mixed with about 18% NaOH, pressed and subjected to a pre-ripeness at about 34 ° C for 19 hours.
- the Lettelauge contained 0% xylan.
- the resulting dope was conventionally spun into fibers having the properties shown in Table 2, Example 1.
- the present in the fibers (low molecular weight) xylan of 0.6 and 0.7% comes from the pulp used.
- Example 2 To a xanthate according to Example 1, a Lettelauge with 8.5 g / 1 high molecular weight xylan was added. The resulting dope was spun into fibers having the properties shown in Table 2, Example 2. The xylan uptake was 63% of the high molecular weight xylan present in the L Harborlauge, which corresponds to a proportion of high molecular weight xylan of 0.7% based on the fiber.
- Example 2 To a xanthate according to Example 1, a Lettelauge with 31.7 g / 1 xylan was added. The resulting dope became fibers having the properties given in Table 2, Example 5 Spun shown properties. The xylan uptake was 60.2% of the high molecular weight xylan present in the L Harborlauge, which corresponds to a high molecular weight xylan content of 6.9% based on the fiber.
- Example 2 To a xanthate according to Example 1, a Lettelauge with 66.3 g / 1 xylan was added. The resulting dope was spun into fibers. The xylan uptake was 54.4% of the high molecular weight xylan present in the L Harborlauge, which corresponds to a high molecular weight xylan content of 10.0% based on the fiber.
- the xylan-containing solubilizer was added to the cellulose xanthate along with solvent water. Obviously due to this, there was a partial precipitation of the xylan in the spinning mass, so that the quality of the spinning solution (filter value etc.) and also those of the spun fibers lagged behind those of Examples 2 to 5.
- Viscose fibers used. After the mash of the pulp, a low-molecular-weight xylan enriched press liquor was obtained by pressing. This liquor was subjected to nanofiltration. The permeate from the nanofilter, which has only a low content of low molecular weight xylan, was then used as L Harborlauge in the pilot plant.
- Viscose fibers used. As Lenderlauge the rich low molecular weight xylan retentate from the nanofiltration described in Example 7 was used. The xylan supply in the dope was 5.67% based on cellulose. Of these, 30.0% were spun into the fiber. A fiber with 2.2% xylan was obtained.
- the molecular weight distribution in fibers was determined by size exclusion chromatography (SEC).
- SEC size exclusion chromatography
- the samples were dissolved in DMAc-LiCl (dimethylacetamide / lithium chloride).
- a MALLS detector multi-angle laser light scattering
- Further details were published by Schelosky N, Röder T, Baldinger T (1999), Molecular Distribution of Cellulosic Products by Size-exclusion chromatography in DMAc / LiCl, Paper 53, 12: 728-738.
- the high molecular weight xylan was taken up to an unexpectedly high level by the fiber.
- the uptake into the viscose fiber was 63% to 79% of the xylan offered in the Léelauge. From the filter value and the particle number it becomes clear that the
- the water retention capacity WRV could also be significantly increased by the incorporation of xylan into the viscose fiber (see Table 2 and FIG. 4). That The uptake of water and the ability to adsorb water could not only be increased, but also selectively adjusted via the xylan content of the fiber. This is z. B. for use in absorbent products a whole new way to make product features.
- the abscissa (xylan content) in Figure 4 again refers to the total content of xylan in the fiber.
- FIG. 4 also shows the water retention capacity of the fiber produced according to Example 6 (high molecular weight xylan content: 10.0%). This was 106.0%.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201330615A SI2929071T1 (sl) | 2012-12-06 | 2013-12-04 | Postopek za izdelavo celuloznega oblikovanca |
PL13801568T PL2929071T3 (pl) | 2012-12-06 | 2013-12-04 | Sposób wytwarzania celulozowego elementu kształtowego |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50564/2012A AT514001B1 (de) | 2012-12-06 | 2012-12-06 | Verfahren zur Herstellung eines cellulosischen Formkörpers |
PCT/EP2013/075575 WO2014086883A1 (de) | 2012-12-06 | 2013-12-04 | Verfahren zur herstellung eines cellulosischen formkörpers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2929071A1 true EP2929071A1 (de) | 2015-10-14 |
EP2929071B1 EP2929071B1 (de) | 2017-02-01 |
Family
ID=49724587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13801568.0A Active EP2929071B1 (de) | 2012-12-06 | 2013-12-04 | Verfahren zur herstellung eines cellulosischen formkörpers |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2929071B1 (de) |
CN (1) | CN104919097B (de) |
AT (1) | AT514001B1 (de) |
ES (1) | ES2622567T3 (de) |
PL (1) | PL2929071T3 (de) |
SI (1) | SI2929071T1 (de) |
WO (1) | WO2014086883A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3536852A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Zellstoff und lyocell faser mit einstellbarem weissgrad |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3536831A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Lyocellfaser mit neuartigem querschnitt |
EP3536832A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Lyocellfaser mit verbesserten zerfallseigenschaften |
EP3536850A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Zellstoff und lyocellformkörper mit reduziertem cellulosegehalt |
EP3536833A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Lyocell-fasern ohne mannan |
CN109913967A (zh) * | 2019-03-19 | 2019-06-21 | 阿拉尔市富丽达纤维有限公司 | 一种利用低聚合度浆粕制备粘胶纤维的工艺 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1932751A (en) * | 1931-09-11 | 1933-10-31 | Brown Co | Preparation of cellulose xanthate from sheeted cellulose fiber |
US2364392A (en) * | 1942-10-17 | 1944-12-05 | Du Pont | Production of alkali metal cellulose xanthate |
IT1121810B (it) * | 1979-06-15 | 1986-04-23 | Snia Viscosa | Procedimento migliorate per la preparazione di viscosa e procedimento di filatura della viscosa cosi'ottenuta |
DE3000306A1 (de) * | 1980-01-05 | 1981-07-09 | Hoechst Ag, 6230 Frankfurt | Verfahren zur herstellung von viskose |
US6686039B2 (en) * | 1999-02-24 | 2004-02-03 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell pulps |
US6685856B2 (en) * | 1999-02-24 | 2004-02-03 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell products method |
AT503610B1 (de) * | 2006-05-10 | 2012-03-15 | Chemiefaser Lenzing Ag | Verfahren zur herstellung eines zellstoffes |
AT503611B1 (de) * | 2006-05-10 | 2009-05-15 | Chemiefaser Lenzing Ag | Verfahren zur herstellung eines zellstoffes |
US20080001325A1 (en) * | 2006-06-30 | 2008-01-03 | Mengkui Luo | Method for Processing High Hemicellulose Pulp in Viscose Manufacture |
-
2012
- 2012-12-06 AT ATA50564/2012A patent/AT514001B1/de not_active IP Right Cessation
-
2013
- 2013-12-04 WO PCT/EP2013/075575 patent/WO2014086883A1/de active Application Filing
- 2013-12-04 ES ES13801568.0T patent/ES2622567T3/es active Active
- 2013-12-04 PL PL13801568T patent/PL2929071T3/pl unknown
- 2013-12-04 SI SI201330615A patent/SI2929071T1/sl unknown
- 2013-12-04 CN CN201380063944.7A patent/CN104919097B/zh active Active
- 2013-12-04 EP EP13801568.0A patent/EP2929071B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014086883A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3536852A1 (de) | 2018-03-06 | 2019-09-11 | Lenzing Aktiengesellschaft | Zellstoff und lyocell faser mit einstellbarem weissgrad |
WO2019170754A1 (de) | 2018-03-06 | 2019-09-12 | Lenzing Aktiengesellschaft | ZELLSTOFF UND LYOCELL FASER MIT EINSTELLBAREM WEIßGRAD |
Also Published As
Publication number | Publication date |
---|---|
SI2929071T1 (sl) | 2017-06-30 |
PL2929071T3 (pl) | 2017-08-31 |
CN104919097B (zh) | 2017-11-03 |
ES2622567T3 (es) | 2017-07-06 |
CN104919097A (zh) | 2015-09-16 |
AT514001B1 (de) | 2016-03-15 |
WO2014086883A1 (de) | 2014-06-12 |
AT514001A1 (de) | 2014-09-15 |
EP2929071B1 (de) | 2017-02-01 |
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