CN102373639A - Recycling method of waste aramid paper - Google Patents
Recycling method of waste aramid paper Download PDFInfo
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- CN102373639A CN102373639A CN2010102485418A CN201010248541A CN102373639A CN 102373639 A CN102373639 A CN 102373639A CN 2010102485418 A CN2010102485418 A CN 2010102485418A CN 201010248541 A CN201010248541 A CN 201010248541A CN 102373639 A CN102373639 A CN 102373639A
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- paper
- precipitating
- aramid fiber
- stoste
- waste
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- 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
- Y02W30/64—Paper recycling
Abstract
The invention discloses a recycling method of waste aramid paper. The method comprises the steps of: deflaking waste aramid paper into aramid paper scraps; subjecting the aramid paper scraps and an organic solvent to normal pressure immersion, then immersing them under a pressure of 0.1-1.0Mpa, thus obtaining paper pulp; disintegrating the paper pulp so as to obtain slurry; mixing the slurry and an auxiliary agent for reaction at a temperature of 60-120DEG C, thus obtaining a stock solution; leaving the stock solution to deaeration and standing so as to obtain a transparent precipitate stock solution; mixing the precipitate stock solution with a precipitation solvent, thus obtaining fibrid. The recycling method of waste aramid paper in the invention can make waste aramid paper into fibrid and solves the environmental pollution problem caused by waste aramid paper. And the produced fibrid can be used for aramid paper production, thus improving the input-output rate of aramid fiber.
Description
Technical field
The present invention relates to the recoverying and utilizing method of waste and old aramid fiber paper.
Background technology
Meta-position aramid fiber paper; Fragrant amide paper between also claiming to gather; Be a kind of speciality paper of processing with pure meta-aramid (poly) fiber; Having high strength, low distortion, high temperature resistant, resistance to chemical attack, fire-retardant and excellent electric insulation performance, be widely used in fields such as Aero-Space, communications and transportation, national defense industry and electric insulation, is a kind of high-tech new material that concerns national security.
It is the important step of utilization of resources that the dissolving of aramid fiber paper is reclaimed, and can effectively solve waste and pollution problem that cutting and the useless fibrid etc. of the waste paper that produces in the production process, paper cause, improves resource utilization.But still there are not relevant therewith research and report at present.
Summary of the invention
The object of the present invention is to provide a kind ofly can solve the environmental pollution that aramid fiber waste paper causes, and can improve the recoverying and utilizing method of waste and old aramid fiber paper of the input and output rate of aramid fiber.
The recoverying and utilizing method of waste and old aramid fiber paper provided by the present invention comprises the steps:
Waste and old aramid fiber paper size degradation is processed the aramid fiber shredded paper;
With said aramid fiber shredded paper and organic solvent normal pressure immersion together, soak at 0.1～1.0Mpa then, obtain paper pulp;
Said paper pulp is discongested processing, obtain slurries;
Said slurries are mixed with auxiliary agent,, obtain stoste 60～120 ℃ of reactions down;
With said stoste deaeration, leave standstill, obtain transparent precipitating stoste;
With said precipitating stoste and precipitating solvent, obtain fibrid.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: the mass ratio of said aramid fiber shredded paper and said organic solvent is (1～10): 1.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: the mass ratio of said slurries and said auxiliary agent is (10～100): 1.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: the mass ratio of said precipitating solvent and precipitating stoste is (1～20): 1.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: said organic solvent is dimethyl formamide, dimethylacetylamide, pyridine or N-Methyl pyrrolidone.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: said auxiliary agent is calcium chloride, lithium chloride or magnesium chloride.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: said precipitating solvent is dimethylacetylamide and water or butanediol or ethylene glycol according to mass ratio 1: (1-10) mix the mixed liquor that obtains.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention, wherein: said normal pressure soaked 1～6 hour; Said 0.1～1.0Mpa soaked 30～60 minutes.
The recoverying and utilizing method of waste and old aramid fiber paper of the present invention can be processed fibrid with aramid fiber waste paper; Solved the problem of environmental pollution that aramid fiber waste paper causes; The fibrid of producing is one of important viscose fibre of aramid fiber wet papermaking, thereby has improved the input and output rate of aramid fiber.
Description of drawings
Fig. 1 is the process chart of the recoverying and utilizing method of waste and old aramid fiber paper provided by the present invention.
The specific embodiment
Embodiment 1,
Adopt shearing technique,, obtain the aramid fiber shredded paper the aramid fiber repulping of waste paper; Aramid fiber shredded paper behind the size degradation and dimethyl formamide (DMF) are pressed in mass ratio adding in 1: the 10 preimpregnation device, soaked 4 hours; At preimpregnation device internal pressure 1.0Mpa, kept 30 minutes, then release pressure; Obtain paper pulp; Paper pulp is squeezed into fluffer discongest that (the equipment running speed is 20～500rpm), obtains slurries; Slurries are squeezed in the reactor, added calcium chloride, the mass ratio of calcium chloride and slurries is 1: 60, reacts 6 hours down at 60 ℃, obtains stoste; Stoste through deaeration, leave standstill and be cooled to room temperature and obtain transparent precipitating stoste; Precipitating stoste and precipitating solvent are transported to precipitating equipment with certain speed respectively, and the mass ratio of precipitating solvent and precipitating stoste is 1: 1, and the equipment running speed is 1200rpm, obtains the fibrid of preliminarily forming through precipitating, can be used for making aramid fiber paper through typing; The precipitating solvent is that dimethylacetylamide and water mix the mixed liquor that obtains according to mass ratio at 1: 1.
Embodiment 2,
Adopt shearing technique,, obtain the aramid fiber shredded paper the aramid fiber repulping of waste paper; Aramid fiber shredded paper behind the size degradation and dimethyl formamide (DMF) are pressed in mass ratio adding in 1: the 5 preimpregnation device, soaked 1 hour; At preimpregnation device internal pressure 1.0Mpa, kept 30 minutes, then release pressure; Obtain paper pulp; Paper pulp is squeezed into fluffer discongest, obtain slurries; Slurries are squeezed in the reactor, added calcium chloride, the mass ratio of calcium chloride and slurries is 1: 50, reacts 10 hours down at 80 ℃, obtains stoste; Stoste through deaeration, leave standstill and be cooled to room temperature and obtain transparent precipitating stoste; Precipitating stoste and precipitating solvent are transported to precipitating equipment with certain speed respectively, and the mass ratio of precipitating solvent and precipitating stoste is 20: 1, and the equipment running speed is 750rpm, obtains the fibrid of preliminarily forming through precipitating, can be used for making aramid fiber paper through typing; The precipitating solvent is that dimethylacetylamide and ethylene glycol mix the mixed liquor that obtains according to mass ratio at 1: 10.
Embodiment 3,
Adopt shearing technique,, obtain the aramid fiber shredded paper the aramid fiber repulping of waste paper; Aramid fiber shredded paper behind the size degradation and dimethylacetylamide (DMAC) are pressed in mass ratio adding in 1: the 10 preimpregnation device, soaked 6 hours; At preimpregnation device internal pressure 0.1Mpa, kept 50 minutes, then release pressure; Obtain paper pulp; Paper pulp is squeezed into fluffer discongest, obtain slurries; Slurries are squeezed in the reactor, added lithium chloride, the mass ratio of lithium chloride and slurries is 1: 20, reacts 8 hours down at 100 ℃, obtains stoste; Stoste through deaeration, leave standstill and be cooled to room temperature and obtain transparent precipitating stoste; Precipitating stoste and precipitating solvent delivery are obtained fibrid to precipitating equipment, and the mass ratio of precipitating solvent and precipitating stoste is 10: 1, and the equipment running speed is 1000rpm, obtains the fibrid of preliminarily forming through precipitating, can be used for making aramid fiber paper through typing; The precipitating solvent is that dimethylacetylamide and butanediol mix the mixed liquor that obtains according to mass ratio at 1: 5.
Embodiment 4,
Adopt shearing technique,, obtain the aramid fiber shredded paper the aramid fiber repulping of waste paper; Aramid fiber shredded paper behind the size degradation and dimethylacetylamide (DMAC) are pressed in mass ratio adding in 1: the 5 preimpregnation device, soaked 6 hours; At preimpregnation device internal pressure 1.0Mpa, kept 30 minutes, then release pressure; Obtain paper pulp; Paper pulp is squeezed into fluffer discongest, obtain slurries; Slurries are squeezed in the reactor, added magnesium chloride, the mass ratio of magnesium chloride and slurries is 1: 100, reacts 8 hours down at 90 ℃, obtains stoste; Stoste through deaeration, leave standstill and be cooled to room temperature and obtain transparent precipitating stoste; Precipitating stoste and precipitating solvent delivery are obtained fibrid to precipitating equipment, and the mass ratio of precipitating solvent and precipitating stoste is 15: 1, and the equipment running speed is 1500rpm, obtains the fibrid of preliminarily forming through precipitating, can be used for making aramid fiber paper through typing; The precipitating solvent is that dimethylacetylamide and water mix the mixed liquor that obtains according to mass ratio at 1: 7.
Embodiment 5,
Adopt shearing technique,, obtain the aramid fiber shredded paper the aramid fiber repulping of waste paper; Aramid fiber shredded paper behind the size degradation and N-Methyl pyrrolidone (NMP) are pressed in mass ratio adding in 1: the 1 preimpregnation device, soaked 6 hours; At preimpregnation device internal pressure 0.5Mpa, kept 60 minutes, then release pressure; Obtain paper pulp; Paper pulp is squeezed into fluffer discongest, obtain slurries; Slurries are squeezed in the reactor, added magnesium chloride, the mass ratio of magnesium chloride and slurries is 1: 10, reacts 10 hours down at 120 ℃, obtains stoste; Stoste through deaeration, leave standstill and be cooled to room temperature and obtain transparent precipitating stoste; Precipitating stoste and precipitating solvent delivery are obtained fibrid to precipitating equipment, and the mass ratio of precipitating solvent and precipitating stoste is 5: 1, and the equipment running speed is 500rpm, obtains the fibrid of preliminarily forming through precipitating, can be used for making aramid fiber paper through typing; Analysing solvent is that dimethylacetylamide and ethylene glycol mix the mixed liquor that obtains according to mass ratio at 1: 6.
Above embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (8)
1. the recoverying and utilizing method of waste and old aramid fiber paper comprises the steps:
Waste and old aramid fiber paper size degradation is processed the aramid fiber shredded paper;
With said aramid fiber shredded paper and organic solvent normal pressure immersion together, soak at 0.1～1.0Mpa then, obtain paper pulp;
Said paper pulp is discongested processing, obtain slurries;
Said slurries are mixed with auxiliary agent,, obtain stoste 60～120 ℃ of reactions down;
With said stoste deaeration, leave standstill, obtain transparent precipitating stoste;
With said precipitating stoste and precipitating solvent, obtain fibrid.
2. method according to claim 1 is characterized in that: the mass ratio of said aramid fiber shredded paper and said organic solvent is 1: (1～10).
3. method according to claim 1 and 2 is characterized in that: the mass ratio of said slurries and said auxiliary agent is (10～100): 1.
4. method according to claim 3 is characterized in that: the mass ratio of said precipitating solvent and precipitating stoste is (1～20): 1.
5. method according to claim 4 is characterized in that: said organic solvent is dimethyl formamide, dimethylacetylamide, pyridine or N-Methyl pyrrolidone.
6. method according to claim 5 is characterized in that: said auxiliary agent is calcium chloride, lithium chloride or magnesium chloride.
7. method according to claim 6 is characterized in that: said precipitating solvent is dimethylacetylamide and water or butanediol or ethylene glycol according to mass ratio 1: (1-10) mix the mixed liquor that obtains.
8. method according to claim 7 is characterized in that: said normal pressure soaked 1～6 hour; Said 0.1～1.0Mpa soaked 30～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102485418A CN102373639A (en) | 2010-08-09 | 2010-08-09 | Recycling method of waste aramid paper |
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| CN2010102485418A CN102373639A (en) | 2010-08-09 | 2010-08-09 | Recycling method of waste aramid paper |
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| CN102373639A true CN102373639A (en) | 2012-03-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928804A (en) * | 2015-07-07 | 2015-09-23 | 哈尔滨工业大学 | Polymer nanofiber preparation method |
| CN106436440A (en) * | 2016-10-11 | 2017-02-22 | 四川辉腾科技股份有限公司 | Fiber forming control production method for poly-m-phenyleneisophthalamide precipitation fiber |
| CN108316038A (en) * | 2018-02-11 | 2018-07-24 | 陕西科技大学 | A method of preparing aramid nano-fiber water-dispersed using reuse p-aramid paper |
| CN113802217A (en) * | 2021-09-18 | 2021-12-17 | 株洲时代华先材料科技有限公司 | Meta-aramid fiber waste recovery method and recovery material |
| CN114837013A (en) * | 2022-05-18 | 2022-08-02 | 超美斯新材料股份有限公司 | Aramid paper re-copying method and system |
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| JPH07243189A (en) * | 1994-03-01 | 1995-09-19 | Teijin Ltd | Production of porous formed material of aramid |
| CN1952226A (en) * | 2006-09-30 | 2007-04-25 | 烟台氨纶股份有限公司 | Meta-aramid fibre fibrid and its making method |
| CN101058903A (en) * | 2007-05-11 | 2007-10-24 | 陕西科技大学 | Method of dissolving aramid fiber |
| CN101440589A (en) * | 2008-12-17 | 2009-05-27 | 中国石化仪征化纤股份有限公司 | Method for preparing contraposition aramid fiber dissolving pulp from contraposition aramid fiber waste silk chopped fiber |
-
2010
- 2010-08-09 CN CN2010102485418A patent/CN102373639A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07243189A (en) * | 1994-03-01 | 1995-09-19 | Teijin Ltd | Production of porous formed material of aramid |
| CN1952226A (en) * | 2006-09-30 | 2007-04-25 | 烟台氨纶股份有限公司 | Meta-aramid fibre fibrid and its making method |
| CN101058903A (en) * | 2007-05-11 | 2007-10-24 | 陕西科技大学 | Method of dissolving aramid fiber |
| CN101440589A (en) * | 2008-12-17 | 2009-05-27 | 中国石化仪征化纤股份有限公司 | Method for preparing contraposition aramid fiber dissolving pulp from contraposition aramid fiber waste silk chopped fiber |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928804A (en) * | 2015-07-07 | 2015-09-23 | 哈尔滨工业大学 | Polymer nanofiber preparation method |
| CN106436440A (en) * | 2016-10-11 | 2017-02-22 | 四川辉腾科技股份有限公司 | Fiber forming control production method for poly-m-phenyleneisophthalamide precipitation fiber |
| CN106436440B (en) * | 2016-10-11 | 2018-12-07 | 四川辉腾科技股份有限公司 | The fiberizing of meta-aramid fibre fibrid controls production method |
| CN108316038A (en) * | 2018-02-11 | 2018-07-24 | 陕西科技大学 | A method of preparing aramid nano-fiber water-dispersed using reuse p-aramid paper |
| CN113802217A (en) * | 2021-09-18 | 2021-12-17 | 株洲时代华先材料科技有限公司 | Meta-aramid fiber waste recovery method and recovery material |
| CN113802217B (en) * | 2021-09-18 | 2023-08-15 | 株洲时代华先材料科技有限公司 | Method for recycling meta-aramid fiber waste and reclaimed materials |
| CN114837013A (en) * | 2022-05-18 | 2022-08-02 | 超美斯新材料股份有限公司 | Aramid paper re-copying method and system |
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| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: YANTAI METASTAR SPECIAL PAPER CO., LTD. Effective date: 20120229 Owner name: YANTAI MINSHIDA SPECIAL PAPER CO., LTD. Free format text: FORMER OWNER: YANTAI SPANDEX GROUP CO., LTD. Effective date: 20120229 |
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Effective date of registration: 20120229 Address after: Emei 264006 Shandong city of Yantai Province Economic and Technological Development Zone No. 1 Road No. 2 Applicant after: Yantai MetaStar Special Paper Co., Ltd. Address before: 264006 No. 9, Heilongjiang Road, Yantai economic and Technological Development Zone, Yantai, Shandong Applicant before: Yantai Spandex Group Co., Ltd. Co-applicant before: Yantai MetaStar Special Paper Co., Ltd. |
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Application publication date: 20120314 |
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