SE2151623A1 - Process to manufacture acid hydrolysed celluloses - Google Patents
Process to manufacture acid hydrolysed cellulosesInfo
- Publication number
- SE2151623A1 SE2151623A1 SE2151623A SE2151623A SE2151623A1 SE 2151623 A1 SE2151623 A1 SE 2151623A1 SE 2151623 A SE2151623 A SE 2151623A SE 2151623 A SE2151623 A SE 2151623A SE 2151623 A1 SE2151623 A1 SE 2151623A1
- Authority
- SE
- Sweden
- Prior art keywords
- acid
- cellulose
- process according
- hydrolysed
- sheets
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims abstract description 126
- 239000002253 acid Substances 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 110
- 235000010980 cellulose Nutrition 0.000 title 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 237
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 174
- 239000001913 cellulose Substances 0.000 claims abstract description 124
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 77
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 58
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims abstract description 58
- 239000011976 maleic acid Substances 0.000 claims abstract description 58
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 47
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000010924 continuous production Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 239000012530 fluid Substances 0.000 claims description 55
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 48
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 39
- 229920001046 Nanocellulose Polymers 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 150000003891 oxalate salts Chemical class 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 238000005243 fluidization Methods 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 238000000527 sonication Methods 0.000 claims description 8
- 238000010009 beating Methods 0.000 claims description 7
- 239000006184 cosolvent Substances 0.000 claims description 7
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 210000001724 microfibril Anatomy 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000004438 BET method Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004627 regenerated cellulose Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 108700005457 microfibrillar Proteins 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/08—Fractionation of cellulose, e.g. separation of cellulose crystallites
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/12—Preparation of cellulose esters of organic acids of polybasic organic acids
-
- 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
- D21C9/001—Modification of pulp properties
-
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
-
- 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
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- 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
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Claims (23)
1. En kontinuerlig eller semi-kontinuerlig process för tillverkning av syrahydrolyserad cellulosa, innefattande följande steg: a) tillhandahållande av ark eller en bana av cellulosafibrer; b) applicering av oxalsyra eller citronsyra eller maleinsyra på arken eller banan; c) reaktion av oxalsyra eller citronsyra eller maleinsyra som applicerats i steg b) vid en temperatur inom intervallet 70-135 °C med cellulosa från arken eller banan för att bilda syrahydrolyserad cellulosa; och d) kylning av den syrahydrolyserade cellulosan.
2. Processen enligt krav 1, som vidare innefattar steget: e) upparbetning av den syrahydrolyserade cellulosan.
3. Processen enligt krav 1 eller 2, där cellulosafibrerna som tillhandahålls i steg a) innehåller mindre än 30 vikt-% vatten, såsom mindre än 20 vikt-% vatten baserat på den totala vikten av cellulosa fibrerna.
4. Processen enligt något av de föregående kraven, där densiteten mätt enligt ISO 534:2011 för arken eller banan som tillhandahålls i steg a) är 400-750 kg/ m3, såsom 450-650 kg/mß, såsom 500-600 kg/mß.
5. Processen enligt något av de föregående kraven, där processen vidare innefattar steget: c1) separering av överskott av oxalsyra eller citronsyra eller maleinsyra från de reagerade arken, där steg c1) utförs efter reaktionssteget c) och före och/ eller under kylningsteget d).
6. Processen enligt något av de föregående kraven, där de reagerade arken eller banan kyls ned till en temperatur under 70 °C, såsom under 60 °C, i steg d).
7. Processen enligt något av de föregående kraven, där de reagerade arken eller banan tvättas med ett lösningsmedel under och/ eller efter kylningen i steg d).
8. Processen enligt något av de föregående kraven, där ark eller en bana av cellulosafibrer transporteras kontinuerligt genom processen med hjälp av en transportanordning, såsom ett transportband.
9. Processen enligt något av de föregående kraven, där reaktionen av oxalsyra eller citronsyra eller maleinsyra i steg c) utförs vid en temperatur inom intervallet 102- 125 °C, såsom inom intervallet 104-120 °C.
10. Processen enligt något av de föregående kraven, där oxalsyra appliceras i steg b) och den syrahydrolyserade cellulosan är cellulosaoxalater.
11. Processen enligt krav 10, där oxalsyran är oxalsyra-dihydrat.
12. En process för tillverkning av syrahydrolyserad nanocellulosa, innefattande följande steg: a) tillhandahållande av ark eller en bana av cellulosafibrer; b) applicering av oxalsyra eller citronsyra eller maleinsyra på arken eller banan; c) reaktion av oxalsyra eller citronsyra eller maleinsyra som applicerats i steg b) vid en temperatur inom intervallet 70-135 °C med cellulosa från arken eller bana för att bilda syrahydrolyserad cellulosa; d) kylning av den syrahydrolyserade cellulosan; - tillsättning av vatten eller en vätska med lägre polaritet än vatten till den syrahydrolyserade cellulosan; och - suspendering av den syrahydrolyserade cellulosan i vattnet eller vätskan med lägre polaritet än vatten med åtminstone en teknik vald från gruppen bestående av sonikering, mikrofluidisering, homogenisering, uppslagning och malning för att erhålla syrahydrolyserad nanocellulosa, där processen i stegen a) - d) är en kontinuerlig eller semi-kontinuerlig process.
13. Processen enligt krav 12, där den syrahydrolyserade cellulosan suspenderas i vatten och pH justeras till att vara inom intervallet 9-10 innan den syrahydrolyserade cellulosan suspenderas för att erhålla syrahydrolyserad nanocellulosa.
14. En process för tillverkning av syrahydrolyserad nanocellulosa, innefattande följande steg: a) tillhandahållande av ark eller en bana av cellulosafibrer; b) applicering av oxalsyra eller citronsyra eller maleinsyra på arken eller banan;c) reaktion av oxalsyra eller citronsyra eller maleinsyra som applicerats i steg b) vid en temperatur inom intervallet 70-135 °C med cellulosa från arken eller banan för att bilda syrahydrolyserad cellulosa; d) kylning av den syrahydrolyserade cellulosan; - tillsättning av olja eller hartser till den syrahydrolyserade cellulosan; och - suspendering av den syrahydrolyserade cellulosan i oljan eller hartset med åtminstone en teknik vald från gruppen bestående av extrusion, sonikering, mikrofluidisering, uppslagning och malning för att erhålla syrahydrolyserad nanocellulosa, där processen i stegen a) - d) år en kontinuerlig eller semi-kontinuerlig process.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2151623A SE545910C2 (en) | 2021-12-27 | 2021-12-27 | Process to manufacture acid hydrolysed celluloses |
| PCT/SE2022/051194 WO2023128851A1 (en) | 2021-12-27 | 2022-12-16 | Process to manufacture acid hydrolysed celluloses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2151623A SE545910C2 (en) | 2021-12-27 | 2021-12-27 | Process to manufacture acid hydrolysed celluloses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE2151623A1 true SE2151623A1 (en) | 2023-06-28 |
| SE545910C2 SE545910C2 (en) | 2024-03-12 |
Family
ID=87000028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2151623A SE545910C2 (en) | 2021-12-27 | 2021-12-27 | Process to manufacture acid hydrolysed celluloses |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE545910C2 (sv) |
| WO (1) | WO2023128851A1 (sv) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017105337A1 (en) * | 2015-12-16 | 2017-06-22 | Finecell Sweden Ab | Manufacture of nanocellulose and intermediates thereof using oxalic acid dihydrate |
| US20170226692A1 (en) * | 2016-02-05 | 2017-08-10 | The United States Of America As Represented By The Secretary Of Agriculture | Integrating the production of carboxylated cellulose nanofibrils and cellulose nanocrystals using recyclable organic acids |
| CN108457112A (zh) * | 2018-01-31 | 2018-08-28 | 华南理工大学 | 一种利用草酸酸解制备纳米纤维素晶须和纤丝的方法 |
| CN109705226A (zh) * | 2018-12-14 | 2019-05-03 | 华南理工大学 | 一种利用柠檬酸水解并结合超声辅助制备羧基化纳米纤维素的方法 |
-
2021
- 2021-12-27 SE SE2151623A patent/SE545910C2/en unknown
-
2022
- 2022-12-16 WO PCT/SE2022/051194 patent/WO2023128851A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017105337A1 (en) * | 2015-12-16 | 2017-06-22 | Finecell Sweden Ab | Manufacture of nanocellulose and intermediates thereof using oxalic acid dihydrate |
| US20170226692A1 (en) * | 2016-02-05 | 2017-08-10 | The United States Of America As Represented By The Secretary Of Agriculture | Integrating the production of carboxylated cellulose nanofibrils and cellulose nanocrystals using recyclable organic acids |
| CN108457112A (zh) * | 2018-01-31 | 2018-08-28 | 华南理工大学 | 一种利用草酸酸解制备纳米纤维素晶须和纤丝的方法 |
| CN109705226A (zh) * | 2018-12-14 | 2019-05-03 | 华南理工大学 | 一种利用柠檬酸水解并结合超声辅助制备羧基化纳米纤维素的方法 |
Non-Patent Citations (2)
| Title |
|---|
| Daza Serna, L. V. et al. 'Supercritical fluids as a green technology for the pretreatment of lignocellulosic biomass'. In: Biores Technol 2016, Vol 199, pp. 113-120 * |
| Henschen, J. et al. 'Preparation of cellulose nanomaterials via cellulose oxalates'. In: Carbohyd Polym 2019, Vol 213, pp. 208-216 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023128851A1 (en) | 2023-07-06 |
| SE545910C2 (en) | 2024-03-12 |
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