CN103613784A - Method for recovering chemical fibers from waste textiles - Google Patents
Method for recovering chemical fibers from waste textiles Download PDFInfo
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- CN103613784A CN103613784A CN201310607344.4A CN201310607344A CN103613784A CN 103613784 A CN103613784 A CN 103613784A CN 201310607344 A CN201310607344 A CN 201310607344A CN 103613784 A CN103613784 A CN 103613784A
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- Prior art keywords
- waste textile
- man
- chemical fibre
- described step
- reclaims
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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
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a method for recovering chemical fibers from waste textiles. The method comprises the steps of crushing waste textiles into fragments serving as raw materials, and adding the raw materials into a reaction kettle; adding alkali liquor into the reaction kettle, uniformly mixing the alkali liquor with the raw materials, and reacting under a heating condition, wherein the chemical fibers including polyester and the like are dissolved in reaction liquid; filtering out insoluble cotton fiber components to obtain filtrate containing chemical fiber components; adding acid for neutralization to obtain a deposit of the chemical fibers, and filtering and drying to obtain a solid mixture of the chemical fibers. According to the method disclosed by the invention, the low-concentration alkali liquor is adopted, the chemical fiber components including polyester can be completely dissolved under the condition with a relatively low temperature, the cotton fibers are not dissolved, the insoluble cotton fibers are filtered out, and the recovered chemical fibers do not contain such components as cotton fibers and can be processed directly to save the cost of energy sources and the like; the used reagent is the low-concentration alkali liquor, the temperature condition is relatively low, the energy consumption is relatively low, organic wastewater which is difficult to degrade can not be generated, and pollution is not caused to the environment basically.
Description
Technical field
The present invention relates to a kind of method that reclaims man-made fiber from waste textile, belong to renewable resource field.
Background technology
Since entering 21 century, fast development along with economy, industry and population, the consumption of textiles is increasing, and the amount of the waste textile that caused is thus also more and more, the environmental pollution causing because disposition of solid waste is improper is also on the rise, the scarcity of resource and contaminated, this is the problem of current global facing.And textile industry and people's life is closely related, world today's textile industry is also faced with two large problems: the one, along with world economy and scientific and technological development, the Application Areas of textiles expands gradually, but its life cycle shortens on the contrary, in addition the growth at full speed of world population, the consumption of textiles has increase, causes textile raw material to occur in short supply, and price significantly raises up.The 2nd, a large amount of used friperies are mostly taken as garbage bury or burning, and this had both caused the wasting of resources, had polluted again environment.Completing of clothes comprised a complicated industrial chain and a large amount of energy consumptions, more and more nervous therefore at the energy and resource, extremely urgent to the recycling of the recycling of solid waste total composition or high added value.
The fiber of the annual processing of China surpasses 4,000 ten thousand tons, and wherein terylene, cotton and both BLENDED FABRIC thereof account for the over half of fiber consumption." 12 " planning points out that textile industry is from now on by the recycling technology of Man-made Fibre and natural fiber waste textile.But due to technology and cost reason, the discarded trueran BLENDED FABRIC of the overwhelming majority is still passed through landfill, burning electricity generation, and even simple burning is processed.The shortcoming of landfill method is that occupation of land is more, easily causes secondary pollution.And burning method not only cost of investment is high, resource utilization is low, and can cause serious topsoil.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method that reclaims man-made fiber from waste textile is provided, the method technique is simple, environmental friendliness, product added value are higher.
For achieving the above object, the technical solution adopted in the present invention is: a kind of method that reclaims man-made fiber from waste textile, and its step comprises: waste textile is ground into fragment as raw material, joins in reactor; In reactor, add alkali lye, mix with raw material, under heating condition, react, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, and obtain the filtrate of containing chemical fibre component; Acid neutralization, obtains the throw out of chemical fibre, and filtering drying obtains the solid mixture of chemical fibre.
Further, in described step, waste textile is pulverized to the fragment into about 2～5 cm.
Further, the alkali lye using in described step for NaOH solution or KOH solution, the mass concentration of alkaline solution be 1%～10%, its consumption is that to make the solid-to-liquid ratio of reaction system be 1:10～1:30.
Further, in described step, under heating condition, reaction refers to, 110～130 ℃ of temperature, reaction times 3～6h.
Further, in described step, filter and select 30 eye mesh screens to filter.
Further, the acid adding in described step refers to a kind of of hydrochloric acid, sulfuric acid, nitric acid or phosphoric acid.
Beneficial effect of the present invention is: the present invention adopts the alkali lye of lower concentration, under lower temperature conditions, can dissolve the chemical fibre components such as terylene completely, and do not dissolve cotton fine, the fine filtration of insoluble cotton removed, chemical fibre after recovery does not contain the cotton fine component that waits, capable of direct processing, save the costs such as the energy; The alkali lye that the reagent using is lower concentration, and temperature condition is lower, and energy consumption is lower, can not produce the organic waste water of difficult degradation, substantially pollution-free to environment.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated.
embodiment 1
From waste textile, reclaim a method for man-made fiber, its step comprises: waste textile is ground into fragment as raw material, joins in reactor; In reactor, add alkali lye, mix with raw material, under heating condition, react, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, and obtain the filtrate of containing chemical fibre component; Acid neutralization, obtains the throw out of chemical fibre, and filtering drying obtains the solid mixture of chemical fibre.
Further, in described step, waste textile is pulverized to the fragment into about 2～5 cm.
Further, the alkali lye using in described step for NaOH solution or KOH solution, the mass concentration of alkaline solution be 1%～10%, its consumption is that to make the solid-to-liquid ratio of reaction system be 1:10～1:30.
Further, in described step, under heating condition, reaction refers to, 110～130 ℃ of temperature, reaction times 3～6h.
Further, in described step, filter and select 30 eye mesh screens to filter.
Further, the acid adding in described step refers to a kind of of hydrochloric acid, sulfuric acid, nitric acid or phosphoric acid.
embodiment 2
10 g waste textiles are ground into fragment as raw material, join in reactor; To adding mass concentration in reactor, be 3% NaOH solution 200 mL, mix with raw material, at 120 ℃, react 3h, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, obtain the filtrate of containing chemical fibre component, acid neutralization, obtains the throw out of chemical fibre, filters, dries the solid mixture that obtains chemical fibre, and chemical fibre component purity reaches 95%.
embodiment 3
50g waste textile is ground into fragment as raw material, joins in reactor; To adding mass concentration in reactor, be 4% NaOH solution 600 mL, mix with raw material, at 110 ℃, react 2h, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, obtain the filtrate of containing chemical fibre component, acid neutralization, obtains the throw out of chemical fibre, filters, dries the solid mixture that obtains chemical fibre, and chemical fibre component purity reaches 96%.
embodiment 4
100g waste textile is ground into fragment as raw material, joins in reactor; To adding mass concentration in reactor, be 3% NaOH solution 1000 mL, mix with raw material, at 120 ℃, react 3h, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, obtain the filtrate of containing chemical fibre component, acid neutralization, obtains the throw out of chemical fibre, and filtering drying obtains the solid mixture of chemical fibre, and chemical fibre component purity reaches 98%.
From above-described embodiment, can find out, the present invention adopts the alkali lye of lower concentration, under lower temperature conditions, can dissolve the chemical fibre components such as terylene completely, and do not dissolve cotton fine, the fine filtration of insoluble cotton removed, chemical fibre after recovery does not contain the cotton fine component that waits, capable of direct processing, saves the costs such as the energy; The alkali lye that the reagent using is lower concentration, and temperature condition is lower, and energy consumption is lower, can not produce the organic waste water of difficult degradation, substantially pollution-free to environment.
The above, be only the specific embodiment of the present invention, is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses, and can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. from waste textile, reclaim a method for man-made fiber, it is characterized in that, step comprises: waste textile is ground into fragment as raw material, joins in reactor; In reactor, add alkali lye, mix with raw material, under heating condition, react, wherein the chemical fibre such as terylene is dissolved in reaction solution; Filter, the fine component of insoluble cotton is leached, and obtain the filtrate of containing chemical fibre component; Acid neutralization, obtains the throw out of chemical fibre, and filtering drying obtains the solid mixture of chemical fibre.
2. the method that reclaims man-made fiber from waste textile according to claim 1, is characterized in that: in described step, waste textile is pulverized to the fragment into about 2～5 cm.
3. the method that reclaims man-made fiber from waste textile according to claim 1, it is characterized in that: the alkali lye using in described step is NaOH solution or KOH solution, the mass concentration of alkaline solution is 1%～10%, and its consumption is that to make the solid-to-liquid ratio of reaction system be 1:10～1:30.
4. the method that reclaims man-made fiber from waste textile according to claim 1, is characterized in that: in described step, under heating condition, reaction refers to, 110～130 ℃ of temperature, reaction times 3～6h.
5. the method that reclaims man-made fiber from waste textile according to claim 1, is characterized in that: in described step, filter and select 30 eye mesh screens to filter.
6. the method that reclaims man-made fiber from waste textile according to claim 1, is characterized in that: the acid adding in described step refers to a kind of of hydrochloric acid, sulfuric acid, nitric acid or phosphoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607344.4A CN103613784A (en) | 2013-11-27 | 2013-11-27 | Method for recovering chemical fibers from waste textiles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310607344.4A CN103613784A (en) | 2013-11-27 | 2013-11-27 | Method for recovering chemical fibers from waste textiles |
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| CN103613784A true CN103613784A (en) | 2014-03-05 |
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| CN201310607344.4A Pending CN103613784A (en) | 2013-11-27 | 2013-11-27 | Method for recovering chemical fibers from waste textiles |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060473A (en) * | 2014-07-04 | 2014-09-24 | 临沂市清宇环境资源综合利用研究院 | Enzyme solution and technology for processing waste polyester/cotton fabric |
| CN104894696A (en) * | 2015-06-29 | 2015-09-09 | 重庆再升科技股份有限公司 | Method for recovering fibers from diaphragmless filter paper edgings |
| CN105887275A (en) * | 2016-04-29 | 2016-08-24 | 华南再生棉纱（梧州）有限公司 | Method for utilizing waste textiles to produce quick-drying hair towel |
| US20160311997A1 (en) * | 2013-12-31 | 2016-10-27 | Reliance Industries Limited | A process for recovering polyester |
| CN106398134A (en) * | 2016-08-31 | 2017-02-15 | 浙江世博新材料股份有限公司 | Method for preparing regenerated PET (polyethylene terephthalate) plastic particle by waste clothes and regenerated PET plastic particle |
| CN106674588A (en) * | 2017-01-05 | 2017-05-17 | 太原理工大学 | Method for separating and recovering waste cotton-polyester blended fabric under subcritical water condition |
| WO2018197756A1 (en) * | 2017-04-27 | 2018-11-01 | Infinited Fiber Company Oy | Treatment process for textile-based materials |
| WO2020126171A1 (en) | 2018-12-21 | 2020-06-25 | Lenzing Aktiengesellschaft | Cellulose raw material and method for recycling a cellulose raw material from blended textile waste |
| EP3820936A4 (en) * | 2018-07-13 | 2022-05-25 | Södra Skogsägarna Ekonomiska Förening | A process for separation of the cellulosic part from a polyester and cellulose composition |
| US11958944B2 (en) | 2023-06-23 | 2024-04-16 | Hybridworks Chemical, Llc | Polyester-cotton blend textile recycling process and system with rotating hydrolysis reactor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102675089A (en) * | 2012-04-15 | 2012-09-19 | 广东巨洋环保科技有限公司 | Recycling method of waste polyester-cotton blended fabric |
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2013
- 2013-11-27 CN CN201310607344.4A patent/CN103613784A/en active Pending
Patent Citations (1)
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| CN102675089A (en) * | 2012-04-15 | 2012-09-19 | 广东巨洋环保科技有限公司 | Recycling method of waste polyester-cotton blended fabric |
Non-Patent Citations (1)
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| 陈葵阳: "《纺织纤维与面料分析》", 31 August 2012, 东华大学出版社 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160311997A1 (en) * | 2013-12-31 | 2016-10-27 | Reliance Industries Limited | A process for recovering polyester |
| CN104060473B (en) * | 2014-07-04 | 2016-04-13 | 临沂清宇环境资源工程设备有限公司 | A kind of enzyme solutions and technique processing waste and old polyester-cotton fabric |
| CN104060473A (en) * | 2014-07-04 | 2014-09-24 | 临沂市清宇环境资源综合利用研究院 | Enzyme solution and technology for processing waste polyester/cotton fabric |
| CN104894696A (en) * | 2015-06-29 | 2015-09-09 | 重庆再升科技股份有限公司 | Method for recovering fibers from diaphragmless filter paper edgings |
| CN105887275A (en) * | 2016-04-29 | 2016-08-24 | 华南再生棉纱（梧州）有限公司 | Method for utilizing waste textiles to produce quick-drying hair towel |
| CN106398134B (en) * | 2016-08-31 | 2018-02-23 | 浙江世博新材料股份有限公司 | A kind of method and regenerative PET plastic pellet that regenerative PET plastic pellet is prepared using scrap fabric |
| CN106398134A (en) * | 2016-08-31 | 2017-02-15 | 浙江世博新材料股份有限公司 | Method for preparing regenerated PET (polyethylene terephthalate) plastic particle by waste clothes and regenerated PET plastic particle |
| CN106674588A (en) * | 2017-01-05 | 2017-05-17 | 太原理工大学 | Method for separating and recovering waste cotton-polyester blended fabric under subcritical water condition |
| CN106674588B (en) * | 2017-01-05 | 2019-05-28 | 太原理工大学 | The method of waste and old polyester cotton is separated and recovered under a kind of sub-critical water extraction |
| WO2018197756A1 (en) * | 2017-04-27 | 2018-11-01 | Infinited Fiber Company Oy | Treatment process for textile-based materials |
| CN110785436A (en) * | 2017-04-27 | 2020-02-11 | 无限纤维有限公司 | Method for treating textile-based materials |
| EP3820936A4 (en) * | 2018-07-13 | 2022-05-25 | Södra Skogsägarna Ekonomiska Förening | A process for separation of the cellulosic part from a polyester and cellulose composition |
| WO2020126171A1 (en) | 2018-12-21 | 2020-06-25 | Lenzing Aktiengesellschaft | Cellulose raw material and method for recycling a cellulose raw material from blended textile waste |
| CN113226579A (en) * | 2018-12-21 | 2021-08-06 | 连津格股份公司 | Cellulosic raw material and method for recovering cellulosic raw material from mixed textile waste |
| US11958944B2 (en) | 2023-06-23 | 2024-04-16 | Hybridworks Chemical, Llc | Polyester-cotton blend textile recycling process and system with rotating hydrolysis reactor |
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Application publication date: 20140305 |
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