CN107587362A - It is a kind of to realize that containing for solvent circulation washs waste textile decoloration process - Google Patents
It is a kind of to realize that containing for solvent circulation washs waste textile decoloration process Download PDFInfo
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- CN107587362A CN107587362A CN201610563267.0A CN201610563267A CN107587362A CN 107587362 A CN107587362 A CN 107587362A CN 201610563267 A CN201610563267 A CN 201610563267A CN 107587362 A CN107587362 A CN 107587362A
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- solvent
- decolouring
- waste textile
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- decoloration process
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Abstract
Realize that containing for solvent circulation washs waste textile decoloration process the present invention relates to a kind of, belong to solvent or regeneration technical field.Pending give up is arranged in reactor, while adds solvent alcohol, the cloth that given up after decolouring decolourizes to recycle, and the solvent in reactor is backed into reactor through alcohol continues to complete washing decolouring, and the mass ratio of described useless cloth and solvent is 1:（1‑50）, decolouring carries out at twice, and decolorization temperature is 100 250 DEG C, a length of during decolouring（5‑90）min+（0‑60）min.The recycling for being applied to wash product will be invented, have the advantages that energy consumption is low, the cycle is short, pollution is few.
Description
Technical field
Realize that containing for solvent circulation washs waste textile decoloration process the present invention relates to a kind of, belong to waste textile regeneration
Technical field.
Background technology
Useless cloth or waste and old fibre product decolourize to be the big technical barrier faced in waste textile recovery.For thermoplasticity
For polyester PET, dye molecule is scattered in PET molecule gaps, on the premise of not saboteur's structure, decolouring generally use
Highly polar solvent, such as dimethyl sulfoxide, DMF, THF are extracted, and such solvent decolorizing effect is preferable, but polarity is big and easily waves
Hair, has certain bio-toxicity, easily environment is polluted.Based on this, the application is made.
The content of the invention
In order to overcome the drawbacks described above in the presence of existing useless cloth decolorization, the application provides a kind of achievable solvent and returned
Receive and recycle, realized using environmentally friendly solvent and circulate decoloration process containing the solvent for washing waste textile decolouring.
To achieve the above object, the technical scheme that the application takes is as follows：
It is a kind of to realize that containing for solvent circulation washs waste textile decoloration process, pending give up is arranged in reactor, together
When add solvent alcohol, it is described containing the quality for washing waste textile and solvent containing washing recycling after waste textile decolourizes
Than for 1:(1-50), decolouring are carried out at twice, and decolorization temperature is 100-250 DEG C, a length of (5-90) min+ (0- during decolouring
60)min。。
Further, as preferred：
Described solvent is rear road reaction dissolvent recovery gained, and it reclaims path and technological parameter is specially：By at this
Obtained after (the fluctuating 30 DEG C) distillation nearby of the boiling point of alcohols solvent.
Described bleaching temperature is 150-180 DEG C, a length of (15-60) min+ (5-60) min during decolouring.
Described is that, it is furthermore preferred that in described useless cloth, terylene content is 70%- containing useless cloth is washed containing waste textile is washed
100%；Selectable useless cloth type is the pure product, flexible or nonelastic containing washing product, have lines or villous containing washing washed
Product or tweed, which contain, washs product.
The application is applied to coloured containing washing or the pure post processing and recycling for washing product, its operation principle and had
Beneficial effect is mainly as follows：
(1) the problem of first have to solve is bleaching principle.Road dyeing after terylene product uses disperse dye, in height
Dyed under warm condition of high voltage, disperse dyes are practically insoluble in water, are dispersed in water with molecule, under the high temperature conditions to
PET fiber surface spreads.Original liquid coloring type polyester fiber is also that dye molecule is scattered in PET molecular structures, and the two is with molecule
Intermolecular forces rather than it is chemically bound together.Therefore, in the case where not destroying the precursor of PET molecular structures, decolourize more using high pole
Property solvent, penetrate into inside PET, dye molecule is lost or is weakened and the combination effect of polyester, and spread or be dissolved into
In decolorising agent, so as to reach the purpose of decolouring.The principle decolourized using alcohols is similar with polar solvent, and alkanol molecule is one
Determine to be swelled polyester fiber at temperature, the dye molecule in fiber is diffused into solvent.
(2) next to that to solve how to realize optimal decolorizing effect, and the problem of do not cause PET alcoholysis.The application is carried
In the decolorization of confession, the principal element for influenceing decolorizing effect is divided into useless cloth solvent ratio, bleaching temperature, bleaching time and decolouring
Processing mode.
1. useless cloth solvent quality ratio：The usage amount of solvent is related to time and the processing cost of processing, on the one hand, is effective
Control cost, the cloth quantity of solvent ratio that gives up in principle are the bigger the better, on the other hand, it is to be ensured that useless cloth fully contacts with solvent.Based on
From the aspect of upper two, cloth quantity of solvent of giving up use range is 1：(1~50), while quantity of solvent is enough to flood useless cloth, also ensure useless
Cloth fully contacts with solvent, effectively improves decolorizing efficiency, meanwhile, quantity of solvent will not be excessive, causes the waste of solvent.
2. bleaching temperature：By to carrying out decolourizing to compare under this temperature range of normal temperature~198 DEG C as can be seen that temperature of decolourizing
When degree is no more than 100 DEG C, because the process of solvent into molecular structure is slower, cloth decolouring unobvious of giving up；At 150 DEG C~180 DEG C
In the range of, solvent activity is higher, and solvent with the dyestuff on useless cloth fully efficiently contact, and by these dyestuffs from useless cloth
The speed of upper " carrying " is also very fast, and diffusion velocity is fast, and useless be furnished with obviously is decolourized；But when bleaching temperature is higher than 180 DEG C,
The temperature easily causes solvent volatilization, and cause the possibility of PET alcoholysis to increase close to the boiling point of organic solvent.
3. mode of decolourizing：The optional disposable removing of decolouring mode, it also may be selected repeatedly to remove twice or more than twice,
When using once removing, there is colour purity to wash for light color, containing product is washed for, be dissolved in dye content in de-inking solution compared with
It is few, do not have too much influence；But for it is dark, redye product for, when completion is once decolourized, contained in de-inking solution
A considerable amount of dyestuffs, when continuing to be decolourized in the de-inking solution, pigment concentration is too high in solution system, and give up cloth portion
Divide after decolourizing, be difficult to ensure that have some dyes above contaminates onto product again, however it is unfavorable for the holding of decolorizing effect；When decolouring number
When excessive, then on the one hand processing wheel number is excessive, feeds the material returned time by increasing, extends process cycle, on the other hand will also result in
The waste of water resource and energy consumption, comprehensive each factor are considered, when decolouring mode select for 2-4 times when preferably.
4. bleaching time：After decolouring mode is selected, the time decolourized twice can be distributed respectively according to the effect of decolouring, with
The extension of bleaching time, the cloth that gives up is complete not exclusively to decolourizing from decolourizing, but when bleaching time is long, and useless cloth is containing there is pigment
Organic solution in contaminate in some dyes small molecule that is decomposed, therefore, the time is unsuitable long.
5. different type has colour purity to wash, containing washing product：Common processing it is coloured containing wash, pure product of washing is mainly pure to wash, contain
Wash and it is flexible, have lines, villous, tweed two ways classification, different type product is to handling duration, treatment temperature
Slightly different for meeting, should treat with a certain discrimination.
Brief description of the drawings
Fig. 1 is the device schematic flow sheet of the application.
Embodiment
Embodiment 1
Using coloured containing useless cloth is washed as process object, decoloration process is washed to alcohol provided herein and is specifically addressed；Its
In nonelastic black is pure washs as 1# samples；It is flexible, have lines black containing to wash 95% product be 2# samples, it is flexible, have suede
Hair black is 3# samples containing 90% product is washed；For cool colour series tweed containing washing 85%, product is 4# samples；Light tone series tweed
It is 5# samples containing 80% product is washed；Nonelastic light color is pure to be washed as 6# samples；Flexible light color, which contains, washs 75% product as 7# samples
Product.
1. mode of decolourizing：
Respectively with elastic black it is pure wash, the pure decolouring washed two samples and carry out different modes of nonelastic light color, give up cloth solvent
Mass ratio 1:40,180 DEG C of bleaching temperature, referring specifically to table 1.
Influence of the different decolouring modes of table 1 to decolorizing effect
Disposable removing may be selected in decolouring mode, also may be selected twice or repeatedly removing more than twice, can be with by table 1
Find out, when using once removing, there is colour purity to wash for light color, containing product is washed for, the dyestuff being dissolved in de-inking solution contains
Measure less, do not have too much influence；But for it is dark, redye product for, when completion is once decolourized, in de-inking solution
A considerable amount of dyestuffs are contained, when continuing to be decolourized in the de-inking solution, pigment concentration is too high in solution system, gives up
After cloth partial decolorization, it is difficult to ensure that have some dyes above contaminates onto product again, however it is unfavorable for the holding of decolorizing effect；Work as decolouring
When number is excessive, then on the one hand processing wheel number is excessive, and the material returned time is fed by increasing, and extends process cycle, on the other hand also can
Cause the waste of energy consumption, comprehensive each factor is considered, when decolouring mode select for 2-3 times when it is preferable.
2. useless cloth solvent ratio：
The usage amount of solvent is related to time and the processing cost of processing, on the one hand, is effective control cost, gives up in principle
Cloth quantity of solvent ratio is the bigger the better, on the other hand, it is to be ensured that useless cloth fully contacts with solvent.
Containing 90% black is washed containing product is washed or black is pure washs nonelastic product as process object, to carry out the cloth solvent that gives up
Than the experiment of preferred scheme, 180 DEG C of bleaching temperature, decolouring mode two-wheeled, bleaching time 15min+5min is (when i.e. the first round decolourizes
A length of 15min, a length of 5min when the second wheel decolourizes, the bleaching temperature of two-wheeled is 180 DEG C), referring specifically to table 2.
The different useless cloth solvents of table 2 compare the influence of decolorizing effect
| Sequence number | Useless cloth solvent ratio | State during decolouring | Decolorizing effect |
| 1 | 1:5 | Fail to soak useless cloth | Can only locally it decolourize |
| 2 | 1:10 | The useless non-complete wetting of cloth | It is local to decolourize |
| 3 | 1:15 | There is contamination solvent on useless cloth, but it is insufficient | After decolouring, product gray |
| 4 | 1:20 | Useless cloth complete wetting solvent | Decolourize complete |
| 5 | 1:30 | Useless cloth complete wetting solvent | Decolourize complete |
| 6 | 1:40 | Useless cloth complete wetting solvent | Decolourize complete |
| 7 | 1:50 | Useless cloth floating is in a solvent | Decolourize complete, solvent has residue |
It is can be seen that by the contrast of table 2 when useless cloth solvent quality ratio reaches 1：When 20, useless cloth can complete wetting it is molten
Agent, 1 is continued to increase to quantity of solvent:During 35, decolorizing efficiency can be higher, but when useless cloth solvent quality ratio increases to
1:40 and 1:When 50, the growth is no longer obvious, i.e., alcohol elution color reaches maximum efficiency value, and excessive solvent no longer causes to decolouring
Actual effect, unnecessary solvent also add cost recovery, and therefore, summary contrast experiment effect and cost are imitated with decolourizing
Consider of both rate, the cloth solvent that gives up is 1 than use range：When (20~40), both ensured that quantity of solvent was enough to flood useless cloth, protected again
The useless cloth of card fully contacts with solvent, effectively improves decolorizing efficiency, meanwhile, quantity of solvent will not be excessive, causes the waste of solvent.
3. bleaching temperature：
Using containing washing 90% black containing washing product or black is pure washs nonelastic product as process object, progress bleaching temperature
The experiment of preferred scheme, cloth solvent quality of giving up is than 1:40, decolouring mode two-wheeled, (i.e. the first round takes off bleaching time 60min+60min
A length of 60min during color, a length of 60min when the second wheel decolourizes), referring specifically to table 3.
Influence of the 3 different bleaching temperatures of table to decolorizing effect
| Sequence number | Bleaching temperature | Decolorizing effect |
| 1 | 25℃ | Only have a small amount of fade in dicyandiamide solution |
| 2 | 55℃ | Only have a small amount of fade in dicyandiamide solution |
| 3 | 80℃ | Only partly faded in dicyandiamide solution |
| 4 | 100℃ | There are decolouring, but unobvious, slowly |
| 5 | 120℃ | There is decolouring, but it is slow to decolourize |
| 6 | 150℃ | There is obvious decolouring |
| 7 | 165 | There is obvious decolouring, and it is rapid to decolourize |
| 8 | 180℃ | Decolourize obvious, decolourize rapid |
| 9 | 190℃ | Decolorizing effect is deteriorated |
It is active relatively low due to solvent when can be seen that bleaching temperature no more than 100 DEG C by the contrast of table 3, spread compared with
Slowly, useless cloth decolouring unobvious, or even the only conventional phenomenon that fades；In the range of 150 DEG C~180 DEG C, solvent activity is higher, molten
Agent with the dyestuff on useless cloth fully efficiently contact, and the speed of " carrying " is also very fast from useless cloth by these dyestuffs,
Diffusion velocity is fast, and useless be furnished with obviously is decolourized；But when bleaching temperature is higher than 180 DEG C, the temperature is close to organic solvent
Boiling point, solvent volatilization is easily caused, reduce the quantity of solvent that participation is decolourized, substantially reduce the utilization rate of solvent materials, add de-
Color difficulty.On the other hand, at 180 DEG C, 190 DEG C, the possibility increase of alcoholysis occurs for PET molecules, has white wax in experimentation
Shape material is generated (for ethylene glycol terephthalate BHET molecules).
4. bleaching time：
Using containing the black of washing 85% it is flexible, have lines containing washing product or black is flexible, villous product is as handling
Object, the experiment of bleaching time preferred scheme is carried out, cloth solvent quality of giving up is than 1:40, decolouring mode is two-wheeled, bleaching temperature 180
DEG C, matrix ginseng is shown in Table 4.
Influence of the 4 different bleaching times of table to decolorizing effect
According to the effect of decolouring, the time decolourized twice is distributed respectively.From table 4, it can be seen that prolonging with bleaching time
Long, the cloth that gives up is complete not exclusively to decolourizing from decolourizing, but when bleaching time is long, give up cloth quilt in containing the organic solution for having pigment
Contaminated in some dyes small molecule of decomposition, therefore, the time is unsuitable long, and long not only small molecule dyes upper dye can arrive decolouring again
On partial useless cloth, but also the decolouring cycle is elongated.
5. different type has colour purity to wash, containing washing product：
To probe into the general applicability of process above condition and processing method, following several classes are commonly used to contain and washed at useless cloth
Reason, 180 DEG C, cloth solvent quality of giving up is than 1：40, two-wheeled decolourizes (first round 15min, the second wheel 5min), referring to table 5.
The different type of table 5 washs the decolorizing effect of product
| Sequence number | Sample | State during decolouring | Decolorizing effect |
| 1 | 1# | Nonelastic, black is pure to wash | Decolourize complete, slightly yellow |
| 2 | 2# | It is flexible, there is a lines, black, 95% | Decolourize complete |
| 3 | 3# | It is flexible, villous, black, 90% | Decolourize complete |
| 4 | 4# | Cool colour series, tweed, 85% | Decolourize complete |
| 5 | 5# | Light tone series, tweed, 80% | Decolourize complete |
| 6 | 6# | Light series, it is pure to wash | Decolourize complete |
| 7 | 7# | Light series, containing washing 75% | Decolourize complete |
Common processing it is coloured containing wash, it is pure wash product be mainly it is pure wash, containing wash and it is flexible, have lines, villous, hair
Flannelette two ways is classified, and different type product is to handling duration, treatment temperature can slightly different, should treat with a certain discrimination.Pass through table 5
Contrast can be seen that under the conditions of given same treatment, each sample reaches good decolorizing effect.
6. multi-factor comprehensive influences
The major influence factors of the decolorizing effect of same sample are decolouring mode, bleaching temperature and bleaching time.
The treatment effect table of comparisons of the 1# samples of table 6
The treatment effect table of comparisons of the 2# samples of table 7
| Decolouring mode | 2 wheels | |||
| Bleaching temperature | 150℃ | 160℃ | 170℃ | 180℃ |
| Bleaching time | 1h+30min | 1h+30min | 30min+30min | 15min+5min |
| Useless cloth solvent ratio | 1:40 | 1:40 | 1:40 | 1:40 |
| Decolorizing effect | Do not fade completely | Do not fade completely | Fade | Fade |
The treatment effect table of comparisons of the 3# samples of table 8
| Decolouring mode | 2 wheels |
| Bleaching temperature | 180℃ |
| Bleaching time | 15min+5min |
| Useless cloth solvent quality ratio | 1:40 |
| Decolorizing effect | Fade |
Above-mentioned table 6-8 also demonstrate decolouring scheme provided herein to it is different types of wash product have it is essentially identical
Decolorizing effect, the processing mode has good general applicability.
When the application is rinsed using alcohol as solvent, the solvent added is after alcohol elution color is participated in, master out
There is difference, decolourize useless cloth and decolouring waste liquid, decolourizes to put into application between useless cloth, decolouring waste liquid then passes through recycling, can
Directly back into reactor, utilized as solvent, in whole process, circulated in solvent realization, promote to decolourize, but discharging useless face
In material and do not contain, therefore, reaction dissolvent has effectively been subjected to recycling, improve solvent utilization rate, solvent utilizes
Rate can reach more than 95%, and compared with conventional decolouring mode, the application, which consumes energy, is reduced to the 43-45% of usual manner, processing
Cycle reduction is to 30-60min.
Above content be with reference to the invention preferred embodiment provided technical scheme is made it is further detailed
Describe in detail bright, it is impossible to assert that the invention specific implementation is confined to these above-mentioned explanations, for the affiliated technology of the invention
For the those of ordinary skill in field, without departing from the concept of the premise of the invention, some simple deductions can also be made
Or replace, it should all be considered as belonging to the protection domain of the invention.
Claims (6)
1. a kind of realize that containing for solvent circulation washs waste textile decoloration process, it is characterised in that：By pending containing washing waste and old spinning
Fabric is placed in reactor, while adds solvent alcohol, and the cloth that given up after decolouring decolourizes to recycle, and the solvent in reactor reclaims through alcohol
Back into reactor and continue to complete washing decolouring, the mass ratio of described useless cloth and solvent is 1:（1-50）, decolourize to enter at twice
OK, decolorization temperature is 100-250 DEG C, a length of during decolouring（5-90）min+（0-60）min.
2. a kind of as claimed in claim 1 realize that containing for solvent circulation washs waste textile decoloration process, it is characterised in that：Institute
The solvent stated be by the road solution that finishes of reaction is filtered after metered after reactor after, fluctuated 30 DEG C of temperature models in solvent boiling point
Interior distillation is enclosed to obtain.
3. a kind of as claimed in claim 1 realize that containing for solvent circulation washs waste textile decoloration process, it is characterised in that：Institute
The bleaching temperature stated is 150-180 DEG C, a length of during decolouring（15-60）min+（5-60）min.
4. a kind of as described in claim any one of 1-3 realize solvent circulation containing waste textile decoloration process is washed, it is special
Sign is：Described useless cloth is washed or containing washing waste textile to be pure.
5. a kind of as claimed in claim 4 realize that containing for solvent circulation washs waste textile decoloration process, it is characterised in that：Institute
Containing for stating is washed in useless cloth, and terylene content is 70%-100%.
6. a kind of as claimed in claim 4 realize that containing for solvent circulation washs waste textile decoloration process, it is characterised in that：Institute
State containing wash waste textile type for coloured polyester fiber, containing wash waste textile block, coloured polyester give up cloth or leftover pieces, have
Color, which contains, washs waste textile.
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| CN201610563267.0A CN107587362A (en) | 2016-07-15 | 2016-07-15 | It is a kind of to realize that containing for solvent circulation washs waste textile decoloration process |
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| CN201610563267.0A CN107587362A (en) | 2016-07-15 | 2016-07-15 | It is a kind of to realize that containing for solvent circulation washs waste textile decoloration process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951233A (en) * | 2018-05-29 | 2018-12-07 | 武汉纺织大学 | A kind of discoloration method of colored terylene fabric |
| WO2022178704A1 (en) * | 2021-02-24 | 2022-09-01 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Method for decolorizing textiles |
| CN116289167A (en) * | 2023-05-17 | 2023-06-23 | 广东绿王新材料有限公司 | Textile decoloring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644007A (en) * | 2009-06-30 | 2010-02-10 | 优顿(天津)精细化工有限公司 | Process and device for decoloring waste and old terylene fabric |
| CN103374144A (en) * | 2012-04-13 | 2013-10-30 | 傅吾录 | Method for extracting polyester material from waste textiles or similar wastes containing polyester |
| CN104420191A (en) * | 2013-09-04 | 2015-03-18 | 远东新世纪股份有限公司 | Method for decolorizing dye-colored polyester fibers |
-
2016
- 2016-07-15 CN CN201610563267.0A patent/CN107587362A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644007A (en) * | 2009-06-30 | 2010-02-10 | 优顿(天津)精细化工有限公司 | Process and device for decoloring waste and old terylene fabric |
| CN103374144A (en) * | 2012-04-13 | 2013-10-30 | 傅吾录 | Method for extracting polyester material from waste textiles or similar wastes containing polyester |
| CN104420191A (en) * | 2013-09-04 | 2015-03-18 | 远东新世纪股份有限公司 | Method for decolorizing dye-colored polyester fibers |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951233A (en) * | 2018-05-29 | 2018-12-07 | 武汉纺织大学 | A kind of discoloration method of colored terylene fabric |
| WO2022178704A1 (en) * | 2021-02-24 | 2022-09-01 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Method for decolorizing textiles |
| CN116289167A (en) * | 2023-05-17 | 2023-06-23 | 广东绿王新材料有限公司 | Textile decoloring method |
| CN116289167B (en) * | 2023-05-17 | 2023-08-18 | 广东绿王新材料有限公司 | Textile decoloring method |
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Address after: 312000 No.6, Wanghai Road, Yuecheng District, Shaoxing City, Zhejiang Province Applicant after: ZHEJIANG LYUYU ENVIRONMENTAL PROTECTION Co.,Ltd. Address before: 312000 No. 6 hope road, Shaoxing, Shaoxing, Zhejiang Applicant before: ZHEJIANG GRERIAL ENVIRONMENTAL PROTECTION CO.,LTD. |
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Application publication date: 20180116 |