SE545759C2 - Method for bleaching pulp from recycled textile material - Google Patents
Method for bleaching pulp from recycled textile materialInfo
- Publication number
- SE545759C2 SE545759C2 SE2250748A SE2250748A SE545759C2 SE 545759 C2 SE545759 C2 SE 545759C2 SE 2250748 A SE2250748 A SE 2250748A SE 2250748 A SE2250748 A SE 2250748A SE 545759 C2 SE545759 C2 SE 545759C2
- Authority
- SE
- Sweden
- Prior art keywords
- bleaching
- pulp
- stage
- ozone
- bleaching stage
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title claims abstract description 153
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000000463 material Substances 0.000 title claims abstract description 23
- 239000004753 textile Substances 0.000 title claims abstract description 18
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000005406 washing Methods 0.000 claims abstract description 26
- 229920002678 cellulose Polymers 0.000 claims abstract description 21
- 239000001913 cellulose Substances 0.000 claims abstract description 21
- 238000009897 hydrogen peroxide bleaching Methods 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims description 19
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 8
- 238000004537 pulping Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 239000002738 chelating agent Substances 0.000 claims description 5
- 239000002516 radical scavenger Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 16
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 9
- 239000004155 Chlorine dioxide Substances 0.000 description 8
- 235000019398 chlorine dioxide Nutrition 0.000 description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 6
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 235000019341 magnesium sulphate Nutrition 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 235000006408 oxalic acid Nutrition 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229960003330 pentetic acid Drugs 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B16/00—Regeneration of cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1073—Bleaching ; Apparatus therefor with O3
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Claims (1)
- Ett förfarande för blekning av massa framställd från återvunnet textilmaterial som innefattar cellulosa, vilket nämnt förfarande innefattar att: - utsätta massan för ett första bleksteg (4; 14); - tvätta (5; 15) massan från det första bleksteget, och - utsätta massan från tvättningen för ett andra bleksteg (8; 18), varvid det första bleksteget innefattar väteperoxidblekning, och varvid nämnda andra bleksteg innefattar ozonblekning. Förfarande enligt patentkrav 1, varvid, i nämnda andra bleksteg (8; 18), nämnda ozonblekning följs direkt av väteperoxidblekning. Förfarande enligt något av föregående patentkrav, varvid ozonsatsningen vid ozonblekningen i det andra bleksteget är mindre än 8 kg/odt, företrädesvis mindre än 6 kg/odt. Förfarande enligt patentkrav 1, varvid en total väteperoxidsatsning i det första bleksteget (4; 14) är mindre än 40 kg/odt. Förfarande enligt något av föregående patentkrav, varvid, om det andra bleksteget (8) innefattar väteperoxidblekning, en total väteperoxidsatning i det första och i det andra bleksteget (4, 8; 14) är mindre än 40 kg/odt. Förfarande enligt något av föregående patentkrav, varvid massan förs till det första bleksteget (4; 14) med en konsistens på minst 30 %, företrädesvis inom ett intervall från 35-42 %. Förfarande enligt något av patentkraven 1-5, varvid massan förs till det första bleksteget (4; 14) med en konsistens på 8-16 %, företrädesvis 10-12 %. Förfarande enligt något av föregående patentkrav, varvidd massan förs till det andra bleksteget (8; 18) med en konsistens på minst 30 %, företrädesvis inom ett intervall från 35-42 %. Förfarande enligt något av patentkraven 1-7, varvid massan förs till det andra bleksteget (8; 18) med en konsistens på 8-16 %, företrädesvis 10-12 %. Förfarande enligt patentkrav 8, varvid färsk ozongas förs till, och motströms satsas till, ozonblekningen i det andra bleksteget (8; 18). Förfarande enligt något av föregående patentkrav, vidare innefattande förbehandling av massan mellan tvättningen och det andra bleksteget, varvid nämnda förbehandling innefattartillsättande av minst en syra för att reducera massans pH och/ellertillsättande av ett eller fler tillsatsmedel, vilka nämnda ett eller flera tillsatsmedel innefattar minst ett kelatmedel och/eller ett radikalfångande medel. Ett förfarande för produktion av blekt cellulosamassa från återvunnet textilmaterial som innnefattar cellulosa, vilket nämnt förfarande innefattar: - massakokning av det återvunna textilmaterialet för att erhålla cellulosamassa, och - blekning av cellulosamassan med användande av förfarandet enligt något av föregående patentkrav.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250748A SE545759C2 (en) | 2022-06-20 | 2022-06-20 | Method for bleaching pulp from recycled textile material |
| PCT/SE2023/050397 WO2023249528A1 (en) | 2022-06-20 | 2023-04-27 | Method and system for bleaching pulp from recycled textile material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2250748A SE545759C2 (en) | 2022-06-20 | 2022-06-20 | Method for bleaching pulp from recycled textile material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE2250748A1 SE2250748A1 (en) | 2023-12-21 |
| SE545759C2 true SE545759C2 (en) | 2024-01-02 |
Family
ID=86328269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2250748A SE545759C2 (en) | 2022-06-20 | 2022-06-20 | Method for bleaching pulp from recycled textile material |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE545759C2 (sv) |
| WO (1) | WO2023249528A1 (sv) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994020673A1 (en) * | 1993-03-03 | 1994-09-15 | A. Ahlstrom Corporation | Method of bleaching pulp with chlorine-free chemicals |
| US5509999A (en) * | 1993-03-24 | 1996-04-23 | Kamyr, Inc. | Treatment of bleach plant effluents |
| US20020088567A1 (en) * | 2000-05-16 | 2002-07-11 | Kaj Henricson | Method and apparatus for treating pulp |
| US20210054567A1 (en) * | 2013-04-17 | 2021-02-25 | Evrnu, Spc | Methods and systems for forming composite fibers |
| SE2051513A1 (en) * | 2020-12-21 | 2022-03-08 | Valmet Oy | Method for bleaching pulp from recycled textile material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE541675C2 (en) | 2016-10-19 | 2019-11-26 | Re Newcell Ab | Recycling of cellulosic textiles |
| WO2021006798A1 (en) * | 2019-07-05 | 2021-01-14 | Kiram Ab | Method for dissolving pulp from recycled textile material |
-
2022
- 2022-06-20 SE SE2250748A patent/SE545759C2/en unknown
-
2023
- 2023-04-27 WO PCT/SE2023/050397 patent/WO2023249528A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994020673A1 (en) * | 1993-03-03 | 1994-09-15 | A. Ahlstrom Corporation | Method of bleaching pulp with chlorine-free chemicals |
| US5509999A (en) * | 1993-03-24 | 1996-04-23 | Kamyr, Inc. | Treatment of bleach plant effluents |
| US20020088567A1 (en) * | 2000-05-16 | 2002-07-11 | Kaj Henricson | Method and apparatus for treating pulp |
| US20210054567A1 (en) * | 2013-04-17 | 2021-02-25 | Evrnu, Spc | Methods and systems for forming composite fibers |
| SE2051513A1 (en) * | 2020-12-21 | 2022-03-08 | Valmet Oy | Method for bleaching pulp from recycled textile material |
Non-Patent Citations (1)
| Title |
|---|
| Etienne Montet. Investigation of the consequences of the use of ozone in the bleaching of cellulosic fibres. Chemical and Process Engineering. Université Grenoble Alpes 2021. Thesis published 2022-01-23. * |
Also Published As
| Publication number | Publication date |
|---|---|
| SE2250748A1 (en) | 2023-12-21 |
| WO2023249528A1 (en) | 2023-12-28 |
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