CN103709038A - Method for recovering polyester fiber in waste fabric - Google Patents
Method for recovering polyester fiber in waste fabric Download PDFInfo
- Publication number
- CN103709038A CN103709038A CN201310694019.6A CN201310694019A CN103709038A CN 103709038 A CN103709038 A CN 103709038A CN 201310694019 A CN201310694019 A CN 201310694019A CN 103709038 A CN103709038 A CN 103709038A
- Authority
- CN
- China
- Prior art keywords
- polyster fibre
- liquid
- alcoholysis
- leftover
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 239000004744 fabric Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 title claims abstract description 16
- 229920000728 polyester Polymers 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000006136 alcoholysis reaction Methods 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 13
- 238000000967 suction filtration Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000000178 monomer Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 29
- 239000004753 textile Substances 0.000 claims description 23
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 239000012153 distilled water Substances 0.000 claims description 14
- 230000002000 scavenging effect Effects 0.000 claims description 10
- 238000002425 crystallisation Methods 0.000 claims description 8
- 230000008025 crystallization Effects 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 229920004933 Terylene® Polymers 0.000 claims description 6
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 239000004246 zinc acetate Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 abstract description 16
- 231100000252 nontoxic Toxicity 0.000 abstract description 5
- 230000003000 nontoxic effect Effects 0.000 abstract description 5
- 230000035484 reaction time Effects 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- 239000012670 alkaline solution Substances 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 description 5
- 238000004064 recycling Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920004934 Dacron® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a method for recovering polyester fiber in a waste fabric. The method comprises the steps of adding an alkaline solution into a recovered polyester fabric, heating in a water both of 20-60 DEG C, removing dirt and scales on the fabric, drying and shearing; adding an alcoholysis solution and a depolymerization catalyst into an alcoholysis reaction kettle for presoaking and stirring, enabling the presoaked solid and liquid mixture to react at the temperature of 170-210 DEG C and normal pressure for a period of time, condensing and reflowing in the reaction process, and slowly stirring; carrying out suction filtration when the obtained polyester fiber slurry is at the temperature of 80-100 DEG C; collecting filtrate and a cleaning solution, adding activated carbon, heating in a water bath of 70-100 DEG C for 0.5-3h, decoloring and filtering to remove insoluble substances while the solution is hot; carrying out an ice bath at 0-15 DEG C, staying overnight, crystallizing and drying after filtering a polyester fiber monomer crystal. The method has the advantages of mild condition in the reaction process, nontoxic and harmless solvent, short reaction time, high efficiency, simplicity and convenience in crystal recovering method and good product quality.
Description
Technical field
The present invention relates to a kind of method that reclaims polyster fibre in waste textiles, belong to resource recovery technical field.
Background technology
Economize on resources, protection of the environment, this is the difficult problem that current global common need solves, particularly particularly outstanding to the chemical fibre industry large, that have a large capacity and a wide range of petroleum resources degree of dependence.According to pertinent data, global prospective oil also can only maintain exploitation more than 40 years, and the chemical fiber industry that this certainty greatly limit petrochemical industry chain end development from now on, causes fibers material in short supply.But the raising along with people's personal consumption level, the life cycle of textiles shortens greatly, textile fibres demand increases rapidly, the contradictions such as the textile raw material supply and demand deriving thus have directly caused the rise year after year of textile raw material price, this will have influence on the survival and development of textile enterprise, and hinders the further raising of people's living standard.Meanwhile, the annual various discarded textiless in the whole world constantly increase.And waste textile seldom can recycling, mostly directly buries or burns.Because synthesising fibre textiles is as difficult degradeds such as terylene, bury rear very harmfully to edatope, in addition, the textiles that contains synthon can produce a large amount of toxic gases in combustion processes, causes topsoil.
Therefore, the recycling of waste textile, particularly the recycling of polyster fibre not only can be alleviated the present situation of chemical fibre industry shortage of resources, and can reduce chemical fibre fabric as pollution on the environments such as terylene, there is very large economic benefit and social benefit, benefit the nation and the people, be the environmental protection industry of an aboundresources, less investment, remarkable benefit, for this reason, need a kind of reaction process mild condition, solvent is nontoxic, reaction times is short, and efficiency is high, reclaims crystal method easy, the recovery method of good product quality, but in prior art, have no report.
Summary of the invention
The object of the invention is to solve the problems of the prior art, a kind of reaction process mild condition is provided, solvent is nontoxic, and the reaction times is short, and efficiency is high, reclaims crystal method easy, the method for polyster fibre in the recovery waste textiles of good product quality.
For achieving the above object, the technical solution adopted in the present invention is:
Reclaim a method for polyster fibre in waste textiles, its step is as follows:
One, pre-treatment: add alkali lye in the polyester piece good reclaiming, then heat 1～2 h in 20～60 ℃ of water-baths, dirty stain and the dirt on fabric removed in washing, dries; The textile cutting cleaning up is become to the leftover of bolt of cloth, stand-by;
Two, alcoholysis: the leftover of bolt of cloth of having sheared is joined in alcoholysis reaction still, the alcoholysis liquid that adds ethylene glycol and distilled water to mix, wherein distilled water content 0～50%, add afterwards depolymerization catalyzer, 0.2～0.8 h is stirred in preimpregnation, by good solidliquid mixture synthesis under normal pressure 0.4～3 h under 170～210 ℃ of conditions of above-mentioned preimpregnation, condensing reflux in reaction process, and slowly stir;
Three, suction filtration: after reaction finishes, obtain polyster fibre liquid slurry, suction filtration when temperature is reduced to 80～100 ℃, the polyster fibre slurry after depolymerization is separated with insolubles suction filtration, with distilled water, clean insolubles, collect filtered liquid and scavenging solution, stand-by;
Four, decolouring crystallization: add gac in the filtered liquid of collecting in step 3 and scavenging solution, heat 0.5～3 h in 70～100 ℃ of water-baths, decolour, the rear filtered while hot of having decoloured, removes insolubles; Liquid after filtering is placed in 0～15 ℃ of ice bath and spent the night, and crystallization goes out the polyster fibre monomer of single component, and after filtering, crystal is dry in 30～60 ℃ of baking ovens.
Further, in described step 1, polyester piece good refers to terylene or polyester blended fabric.
Further, in described step 1, the alkali lye adding is 2～6% NaOH solution, polyester piece good and the solid-to-liquid ratio 1:2～1:20 that adds alkali lye.
Further, in described step 1, the leftover of bolt of cloth is of a size of 5～15 cm.
Further, in described step 2, the solid-to-liquid ratio of the leftover of bolt of cloth and alcoholysis liquid is 1:1～1:15, and the add-on of depolymerization catalyzer is 0.03%～0.5% of leftover of bolt of cloth weight, and depolymerization catalyzer is selected zinc acetate.
Beneficial effect of the present invention is: the present invention utilizes chemical process to make the polyster fibre macromolecule polymer material depolymerization in waste textiles, makes it be converted into less molecule or monomer, and then utilizes these monomers to synthesize new man-made fiber; Whole reaction process mild condition, solvent is nontoxic, and the reaction times is short, and efficiency is high, reclaims crystal method easy, good product quality.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, to help understanding content of the present invention.
embodiment 1
Reclaim a method for polyster fibre in waste textiles, its concrete steps are as follows:
One, pre-treatment: add 2%～6% NaOH solution in the terylene reclaiming or polyester blended fabric, polyester piece good and the solid-to-liquid ratio 1:5～1:20 that adds alkali lye, then in 20～60 ℃ of water-baths, heat 1～2 h, dirty stain and the dirt on fabric removed in washing, dries; The textile cutting cleaning up is become to the leftover of bolt of cloth of 5～15 cm sizes, stand-by;
Two, alcoholysis: the leftover of bolt of cloth of having sheared is joined in alcoholysis reaction still, the alcoholysis liquid that adds ethylene glycol and distilled water to mix, wherein distilled water content 0～50%, the solid-to-liquid ratio of the leftover of bolt of cloth and alcoholysis liquid is 1:1～1:15, add afterwards zinc acetate as depolymerization catalyzer, adding depolymerization catalyzer is 0.03%～0.5% of leftover of bolt of cloth weight, 0.2～0.8 h is stirred in preimpregnation, by good solidliquid mixture synthesis under normal pressure 0.4～3 h under 170～210 ℃ of conditions of above-mentioned preimpregnation, condensing reflux in reaction process, and slowly stir;
Three, suction filtration: after reaction finishes, obtain polyster fibre liquid slurry, suction filtration when temperature is reduced to 80～100 ℃, the polyster fibre slurry after depolymerization is separated with insolubles suction filtration, with distilled water, clean insolubles, collect scavenging solution and filtered liquid, stand-by;
Four, decolouring crystallization: add gac in the filter liquide of collecting in step 3 and scavenging solution, heat 0.5～3 h in 70～100 ℃ of water-baths, decolour, the rear filtered while hot of having decoloured, removes the insolubless such as gac; Liquid after filtering is placed in 0～15 ℃ of ice bath and spent the night, and crystallization goes out the polyster fibre monomer of single component, and after filtering, crystal is dry in 30～60 ℃ of baking ovens.
embodiment 2
The blue Sportswear of the waste and old terylene reclaiming from rubbish is soaked to 2 h with 60 ℃ of water-baths of NaOH solution of 2%, and solid-to-liquid ratio is 1:5, by the dirty stain on clothing, after Fouling Cleaning one time, use again clear water rinsing clean, by cleaning complete Sportswear, anhydrate, dry, Sportswear is cut into the 10 cm size leftover of bolt of cloth.
Taking the leftover of bolt of cloth that 35 g shear joins in the alcoholysis reaction still that whipping appts and condensation reflux unit are housed, by solid-to-liquid ratio, be the mixed solution that 1:2 adds ethylene glycol and distilled water, distilled water accounts for 5% of mixed solution, then adds 0.04 g zinc acetate, preimpregnation 0.5 h then reacts 2 h at 195 ℃.
Hot suction filtration when temperature drops to 90 ℃, by the polyster fibre slurry after depolymerization, suction filtration is separated immediately with insolubles; With distilled water, clean insolubles, collect scavenging solution and filter liquide, stand-by.
In the filter liquide of collecting and scavenging solution, add gac, in 70 ℃ of heating 2 h, decolour; Liquid after decolouring, places in 5 ℃ of ice baths and spends the night, and crystallization goes out the polyster fibre monomer of single component.Crystal color is micro-yellow, filters, and crystal is dry in 60 ℃ of drying bakers.
embodiment 3
50 ℃ of water-baths of NaOH solution of the use 3% such as the dacron shirt of finding from rubbish, skirt are soaked to 2 h, and solid-to-liquid ratio is 1:10.By the dirty stain on clothing, after Fouling Cleaning one time, then use clear water rinsing clean.By cleaning complete clothing, anhydrate, dry, cut into the 10 cm size leftover of bolt of cloth.
Taking the leftover of bolt of cloth that 250 g shear joins in the alcoholysis reaction still that whipping appts and condensation reflux unit are housed, by solid-to-liquid ratio, it is the mixed solution that 1:5 adds ethylene glycol and distilled water, distilled water accounts for 10% of mixed solution, add again 0.1 g zinc acetate, preimpregnation 0.5 h reacts 2 h when temperature is 170 ℃.
Hot suction filtration when temperature drops to 80 ℃, reacted polyster fibre liquid slurry is separated with insolubles, and insolubles cleans twice, and scavenging solution and filtered liquid are collected stand-by.
The filter liquide of collecting and scavenging solution are added to gac, in 90 ℃ of heating in water bath 1 h, decolour; Liquid after decolouring, places in 4 ℃ of ice baths and spends the night, and crystallization goes out the polyster fibre monomer of single component.Crystal color is micro-yellow, filters, and crystal is dry in 60 ℃ of drying bakers.
The present invention utilizes the mixed solution of ethylene glycol and effective catalyst combination, polyster fibre is dissolved, and obtain the monomer of polyster fibre, and then utilize these monomers can synthesize new man-made fiber; Whole reaction process mild condition, solvent is nontoxic, and the reaction times is short, and efficiency is high, reclaims crystal method easy, good product quality.
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 (5)
1. a method that reclaims polyster fibre in waste textiles, is characterized in that, step is as follows:
One, pre-treatment: add alkali lye in the polyester piece good reclaiming, then heat 1～2 h in 20～60 ℃ of water-baths, dirty stain and the dirt on fabric removed in washing, dries; The textile cutting cleaning up is become to the leftover of bolt of cloth, stand-by;
Two, alcoholysis: the leftover of bolt of cloth of having sheared is joined in alcoholysis reaction still, the alcoholysis liquid that adds ethylene glycol and distilled water to mix, wherein distilled water content 0～50%, add afterwards depolymerization catalyzer, 0.2～0.8 h is stirred in preimpregnation, by good solidliquid mixture synthesis under normal pressure 0.4～3 h under 170～210 ℃ of conditions of above-mentioned preimpregnation, condensing reflux in reaction process, and slowly stir;
Three, suction filtration: after reaction finishes, obtain polyster fibre liquid slurry, suction filtration when temperature is reduced to 80～100 ℃, the polyster fibre slurry after depolymerization is separated with insolubles suction filtration, with distilled water, clean insolubles, merge filtered liquid and scavenging solution, stand-by;
Four, decolouring crystallization: add gac in the filtered liquid of collecting in step 3 and scavenging solution, heat 0.5～3 h in 70～100 ℃ of water-baths, decolour, the rear filtered while hot of having decoloured, removes insolubles; Liquid after filtering is placed in 0～15 ℃ of ice bath and spent the night, and crystallization goes out the polyster fibre monomer of single component, and after filtering, crystal is dry in 30～60 ℃ of baking ovens.
2. the method for polyster fibre in recovery waste textiles according to claim 1, is characterized in that: in described step 1, polyester piece good refers to terylene or polyester blended fabric.
3. the method for polyster fibre in recovery waste textiles according to claim 1, is characterized in that: in described step 1, the alkali lye adding is 2～6% NaOH solution, and the solid-to-liquid ratio of polyester piece good and alkali lye is 1:2～1:20.
4. the method for polyster fibre in recovery waste textiles according to claim 1, is characterized in that: in described step 1, the leftover of bolt of cloth is of a size of 5～15 cm.
5. the method for polyster fibre in recovery waste textiles according to claim 1, it is characterized in that: in described step 2, the solid-to-liquid ratio of the leftover of bolt of cloth and alcoholysis liquid is 1:1～1:15, and the add-on of depolymerization catalyzer is 0.03%～0.5% of leftover of bolt of cloth weight, and depolymerization catalyzer is selected zinc acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694019.6A CN103709038B (en) | 2013-12-18 | 2013-12-18 | A kind of method reclaiming polyster fibre in waste textiles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310694019.6A CN103709038B (en) | 2013-12-18 | 2013-12-18 | A kind of method reclaiming polyster fibre in waste textiles |
Publications (2)
| Publication Number | Publication Date |
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| CN103709038A true CN103709038A (en) | 2014-04-09 |
| CN103709038B CN103709038B (en) | 2016-01-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452310A (en) * | 2014-11-19 | 2015-03-25 | 安徽聚顺塑业科技有限公司 | New technology for preparing high-performance polyester fiber based on waste clothes |
| CN105384621A (en) * | 2015-10-26 | 2016-03-09 | 太仓市毅飞化纤织造有限公司 | Method for recycling polyester waste |
| CN108085854A (en) * | 2017-12-29 | 2018-05-29 | 杭州联成华卓实业有限公司 | Recycle the production technology of terylene and cotton blended fabric |
| CN110204781A (en) * | 2019-06-17 | 2019-09-06 | 中塑联新材料科技湖北有限公司 | A kind of method of terylene waste spinning depolymerization filtering decoloration |
| CN111533949A (en) * | 2020-05-28 | 2020-08-14 | 安徽省天助纺织科技集团股份有限公司 | Recycling treatment process for waste polyester textile fabrics |
| WO2020168677A1 (en) * | 2019-02-22 | 2020-08-27 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Methods and systems for decolorizing textile materials |
| CN115415290A (en) * | 2022-07-05 | 2022-12-02 | 江苏聚盛节能科技有限公司 | Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452310A (en) * | 2014-11-19 | 2015-03-25 | 安徽聚顺塑业科技有限公司 | New technology for preparing high-performance polyester fiber based on waste clothes |
| CN104452310B (en) * | 2014-11-19 | 2016-05-04 | 安徽园创新材料有限公司 | Prepare high performance PET fibre technology based on waste and old clothing |
| CN105384621A (en) * | 2015-10-26 | 2016-03-09 | 太仓市毅飞化纤织造有限公司 | Method for recycling polyester waste |
| CN108085854A (en) * | 2017-12-29 | 2018-05-29 | 杭州联成华卓实业有限公司 | Recycle the production technology of terylene and cotton blended fabric |
| WO2020168677A1 (en) * | 2019-02-22 | 2020-08-27 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Methods and systems for decolorizing textile materials |
| CN111607920A (en) * | 2019-02-22 | 2020-09-01 | 香港纺织及成衣研发中心有限公司 | Method and device for decolouring textile materials |
| US11085148B2 (en) | 2019-02-22 | 2021-08-10 | Nano And Advanced Materials Institute Limited | Methods and systems for decolorizing textile materials |
| CN110204781A (en) * | 2019-06-17 | 2019-09-06 | 中塑联新材料科技湖北有限公司 | A kind of method of terylene waste spinning depolymerization filtering decoloration |
| CN111533949A (en) * | 2020-05-28 | 2020-08-14 | 安徽省天助纺织科技集团股份有限公司 | Recycling treatment process for waste polyester textile fabrics |
| CN115415290A (en) * | 2022-07-05 | 2022-12-02 | 江苏聚盛节能科技有限公司 | Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product |
| CN115415290B (en) * | 2022-07-05 | 2024-05-03 | 江苏聚盛节能科技有限公司 | Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product of treatment process |
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| CN103709038B (en) | 2016-01-27 |
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