SE2350922A1 - Metal removal in recycling of cellulosic textiles - Google Patents
Metal removal in recycling of cellulosic textilesInfo
- Publication number
- SE2350922A1 SE2350922A1 SE2350922A SE2350922A SE2350922A1 SE 2350922 A1 SE2350922 A1 SE 2350922A1 SE 2350922 A SE2350922 A SE 2350922A SE 2350922 A SE2350922 A SE 2350922A SE 2350922 A1 SE2350922 A1 SE 2350922A1
- Authority
- SE
- Sweden
- Prior art keywords
- during
- cellulose
- carried out
- recycling
- textile material
- Prior art date
Links
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
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
- D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
-
- 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
- D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping processes
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- 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
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Sustainable Development (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Processing Of Solid Wastes (AREA)
- Paper (AREA)
Abstract
A method for removal of metal ions during recycling of textiles comprising cellulose, said method comprising the sequential steps of providing at least one textile material comprising cellulose, treating the material to swell the cellulose, under alkaline and reducing conditions, wherein at least one reducing agent is present at least during a part of the swelling, and treating the material according to at least one of the following steps: i) decreasing the pH to 5.5 or below, and ii) adding a chelating agent. The metal ion content of the material is thereby reduced. The process gives a more efficient metal removal during textile recycling.
Claims (20)
1. A method for removal of metal ions during recycling of textiles comprising cellulose, said method comprising the sequential steps of: a.providing at least one textile material comprising cellulose, b.treating the material to swell the cellulose, under alkaline and reducing conditions, wherein at least one reducing agent is present at least during a part of the swelling, and c.treating the material according to at least one of the following steps: i. decreasing the pH to 5.5 or below, and ii. adding a chelating agent.
2. The method according to claim 1, wherein the at least one textile material comprises at least one selected from the group consisting of cotton, and viscose. lyocell, rayon,
3. The method according to claim 1, wherein the at least one textile material comprises cotton.
4. The method according to any one of claims 1-3, wherein the at least one textile material is mechanically disintegrated before step b).
5. The method according to any one of claims 1-4, wherein the pH during step b) is above 7.
6. The method according to any one of claims 1-5, wherein the pH during step b) is in the range of 9-13.
7. The method according to any one of claims 1-6, wherein NaOH is present during step b) in a concentration from 0.01 to 0.5 mol/l.
8. The method according to any one of claims 1-7, wherein the temperature during step b) is in the range 50-°C.
9. The method according to any one of claims 1-8, wherein the at least one reducing agent comprises sodium dithionite, Na2SflM.
10. The method according to any one of claims 1-9, wherein step c i) is performed and the pH is decreased in step c i) to below
11. The method according to any one of claims 1-10, wherein step c i) is performed and the pH is decreased by addition of at least one of CO2 and HQCO
12. The method according to any one of claims 1-11, wherein step c i) is carried out at a temperature in the interval 60-120 °C.
13. The method according to any one of claims 1-12, wherein step c i) is carried out during 20 minutes-24 hours.
14. The method according to any one of claims 1-13, wherein step c ii) is performed and the chelating agent is EDTA.
15. The method according to any one of claims 1-14, wherein step c ii) is carried out at a temperature in the interval 40-100 °C.
16. The method according to any one of claims 1-15, wherein step c ii)
17. The method according to any one of claims 1-16, wherein a wash is carried out before step c).
18. The method according to any one of claims 1-17, wherein the material is dewatered to a water content of less than 66 wt% before step c).
19. Recycled cellulose material obtained by the method according to any one of claims 1-
20. Use of recycled cellulosic material according to claim 19 in a process for production of viscose. is carried out during 20 minutes-24 hours.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2350922A SE2350922A1 (en) | 2023-07-25 | 2023-07-25 | Metal removal in recycling of cellulosic textiles |
| PCT/EP2024/069560 WO2025021524A1 (en) | 2023-07-25 | 2024-07-10 | Metal removal in recycling of cellulosic textiles |
| EP24743729.6A EP4522800A1 (en) | 2023-07-25 | 2024-07-10 | Metal removal in recycling of cellulosic textiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2350922A SE2350922A1 (en) | 2023-07-25 | 2023-07-25 | Metal removal in recycling of cellulosic textiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE2350922A1 true SE2350922A1 (en) | 2025-01-26 |
Family
ID=91958965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2350922A SE2350922A1 (en) | 2023-07-25 | 2023-07-25 | Metal removal in recycling of cellulosic textiles |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4522800A1 (en) |
| SE (1) | SE2350922A1 (en) |
| WO (1) | WO2025021524A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077807A1 (en) * | 2013-11-26 | 2015-06-04 | Lenzing Ag | Process for pretreating reclaimed cotton fibres to be used in the production of moulded bodies from regenerated cellulose |
| WO2018073177A1 (en) * | 2016-10-19 | 2018-04-26 | Re:Newcell Ab | Recycling of cellulosic textiles |
| WO2018104330A1 (en) * | 2016-12-06 | 2018-06-14 | Re:Newcell Ab | Cellulose fibers |
| WO2021185704A1 (en) * | 2020-03-16 | 2021-09-23 | Re:Newcell Ab | One stage method for acid metal rewoval and bleach |
| WO2022139651A1 (en) * | 2020-12-21 | 2022-06-30 | Valmet Ab | Method for bleaching pulp from recycled textile material |
| CN115536754A (en) * | 2022-09-20 | 2022-12-30 | 赛得利(江苏)纤维有限公司 | Production process of wet pulp for producing viscose by recycling cotton textiles |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030019596A1 (en) * | 2001-04-17 | 2003-01-30 | Ragauskas Arthur J. | Metal substituted xerogels for improved peroxide bleaching of kraft pulps |
| PT2817448T (en) | 2012-02-20 | 2017-02-21 | Re:Newcell Ab | Regeneration of cellulose |
-
2023
- 2023-07-25 SE SE2350922A patent/SE2350922A1/en not_active Application Discontinuation
-
2024
- 2024-07-10 EP EP24743729.6A patent/EP4522800A1/en active Pending
- 2024-07-10 WO PCT/EP2024/069560 patent/WO2025021524A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077807A1 (en) * | 2013-11-26 | 2015-06-04 | Lenzing Ag | Process for pretreating reclaimed cotton fibres to be used in the production of moulded bodies from regenerated cellulose |
| WO2018073177A1 (en) * | 2016-10-19 | 2018-04-26 | Re:Newcell Ab | Recycling of cellulosic textiles |
| WO2018104330A1 (en) * | 2016-12-06 | 2018-06-14 | Re:Newcell Ab | Cellulose fibers |
| WO2021185704A1 (en) * | 2020-03-16 | 2021-09-23 | Re:Newcell Ab | One stage method for acid metal rewoval and bleach |
| WO2022139651A1 (en) * | 2020-12-21 | 2022-06-30 | Valmet Ab | Method for bleaching pulp from recycled textile material |
| CN115536754A (en) * | 2022-09-20 | 2022-12-30 | 赛得利(江苏)纤维有限公司 | Production process of wet pulp for producing viscose by recycling cotton textiles |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025021524A1 (en) | 2025-01-30 |
| EP4522800A1 (en) | 2025-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |