CN102888766B - Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system - Google Patents
Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system Download PDFInfo
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- CN102888766B CN102888766B CN201210424757.4A CN201210424757A CN102888766B CN 102888766 B CN102888766 B CN 102888766B CN 201210424757 A CN201210424757 A CN 201210424757A CN 102888766 B CN102888766 B CN 102888766B
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Abstract
The invention relates to a processing method for removing hydrolyzed reactive dyes on a cotton knitted fabric by using a solvent water system. The processing method comprises the steps that: (1) residual dye liquid is removed after the cotton knitted fabric is dyed, then washing and soaping are carried out; (2) a solvent and water are mixed according to the volume ratio of 1:1-1:3 under the condition of room temperature, and the pH value of the mixture is adjusted to form a solvent water system; and (3) the pretreated dyed cotton knitted fabric is processed for two times by using the solvent water system. According to the method, the dyed cotton knitted fabric is processed by the low-temperature solvent water system for two times rather than one-time high-temperature washing and two-time room-temperature washing in the conventional washing process, the after treatment time is shortened, the production efficiency is improved, and the production cost is reduced; the recovery and recycling of sources is achieved through a solvent recovery system, the production cost is saved, and the environment pollution is reduced; and the after treatment water consumption is greatly saved due to the recovery and repeated use of the solvent, the waste water discharge is reduced, the energy consumption is reduced, and remarkable economic benefit and social benefit are achieved.
Description
Technical field
The invention belongs to the removal method field of hydrolised dye in COTTON FABRIC, particularly a kind of aqueous solvent system is removed the processing method of hydrolysed reactive dye in COTTON FABRIC.
Background technology
REACTIVE DYES is due to first-selected dyestuff bright in colour, chromatogram is complete, dyeing is ripe, COLOR FASTNESS is higher, cost performance advantages of higher becomes dyeing and printing of cellulosic class textiles.But REACTIVE DYES has the REACTIVE DYES up to 20～40% to be hydrolyzed above dying, in set in dyeing course, and can not with the cellulose formation covalent bonds that reacts.Hydrolised dye, be in original REACTIVE DYES unsettled atom or group by hydroxyl, replaced, its diffusion and absorption property and original REACTIVE DYES are closely similar, therefore easily diffuse into fibrous inside, and adsorb its surface and form " loose colour "; While dying dark color in addition, the dye molecule that is adsorbed in fabric face easily forms polymolecular laminar associated matter, produces " steric hindrance " phenomenon, causes again producing loose colour.The existence of set dyestuff can not reduce the COLOR FASTNESS of DYED FABRICS, this problem cannot effectively solve in dyeing course, therefore textiles generally need to pass through multiple tracks washing, soap boiling or reduction cleaning after stamp or dyeing, the dirts such as the dyestuff of not set, auxiliary agent are washed from fiber surface, to improve colour brightness, COLOR FASTNESS and the cleanliness factor of printed fabrics.
It is reported, REACTIVE DYES is dyed half that energy consumption in rear washing process accounts for whole dyeing, water consumption accounts for most of ratio, and the COD that produces of whole dyeing processing has 1/3 with to dye rear washing relevant, and washing processing cost and cost of sewage disposal summation account on half of whole dyeing cost.Pressure for production cost and environmental pollution, dye manufacturers and auxiliary agent supply factory constantly combine release new dye and ecological, environmental protective soaping agent, as the REACTIVE DYES of the Remazol Ultra RGB high colour-fast rate of Dystar release, while dying dark brown, dyestuff similar with other compared, consumption can reduce, and the washing post processing after dyeing also can reduce; The XC-W of BASF exploitation can be used in high salt situation, reduces by one washing, but the new product of releasing is that dyestuff or auxiliary agent all have identical characteristic, and their prices own can be than common exceed several times, and integrated cost does not have minimizing yet.
Since REACTIVE DYES is applied, countless patent, business report, research paper about REACTIVE DYES and supporting soaping agent aspect have been produced.Yet form with it sharp contrast, the publication that relates to REACTIVE DYES washing is few.Although have research dyeing Hou Yong tri-road high temperature washings to replace five road standard wash, to COD and BOD
5reduce and have certain help, still when water consumption reduces, increase the use of the energy, overall cost is obviously decline not.Therefore, in order to save water, auxiliary agent, wash time and the thermal energy consumption in washing process, reducing discharge of wastewater and pollution, improve economic benefit and the ecological benefits of printing and dyeing enterprise, is in textile printing and dyeing processing technology, to be badly in need of the key technology of solution.
Summary of the invention
Technical problem to be solved by this invention is to provide the processing method that a kind of aqueous solvent system is removed hydrolysed reactive dye in COTTON FABRIC, fabric color fastness after processing by the method can reach the requirement of conventional high temperature multiple tracks washing, not only a large amount of using water wisely, energy consumption and wash time, and reducing sewage discharge and the pollution to environment, integrated cost is significantly declined.
A kind of aqueous solvent system of the present invention is removed the processing method of hydrolysed reactive dye in COTTON FABRIC, comprising:
(1), after cotton fabric dyeing process finishes, the dyeing residual liquid of draining, then washes, soaps;
(2) under normal temperature condition, by solvent, in water, be, after 1:1 ~ 1:3 mixes, to regulate pH value by volume, form aqueous solvent system;
(3) with above-mentioned aqueous solvent system to the dyeing through pretreated after COTTON FABRIC carry out twice processing, wherein first be disposed after by residual liquid discharge to solvent recovery unit, then add aqueous solvent system to carry out again second processing, solvent recovery.
In described step (1), be twice washing, technological parameter is: bath raio is 1:5 ~ 1:20, and the time is 5 ~ 10min.
The technological parameter of soaping in described step (1) is: bath raio is 1:5 ~ 1:20,95 ~ 100 ℃ of temperature, time 20 ~ 30min.
In described step (2), solvent is acetone or absolute ethyl alcohol.
In described step (2), pH value is 6 ~ 8.
In described step (3), aqueous solvent system treatment process parameter is: bath raio is 1:5 ~ 1:20, time 20 ~ 40min, 40 ~ 50 ℃ of temperature.
Solvent recovery: adopt solvent recovery unit, different according to solvent boiling point, heat, distillation, cooling, the organic solvent in raffinate after washing is processed into clean as new solvent, can repeatedly recycle.Can save like this cost of buying novel solvent, also alleviate the pollution to environment simultaneously.
Removal process: (1) adds the solution raffinate that contains of needs recycling to arrive a bucket groove; (2) oil of the hot coal in heating rod heating recovery bucket interlayer; Hot coal oil transfers heat to the raffinate in recycling bin, and solution is heated up, and after organic solvent is heated, by liquid state, is converted into steam state; (3) steam state solvent is through cooling system liquefaction outflow; The cleaning solvent of separating flows into and reclaims vessel; Temperature and room temperature when solvent is cooled to liquid outflow are suitable; (4) cleaning residue.
beneficial effect
(1) after the present invention processes dyeing with twice low temperature containing aqueous solvent system, COTTON FABRIC replaces the one high temperature washing twice normal temperature washing in conventional washing process, shortened finishing time, improved production efficiency, reduced production cost, for dark heavy colour, need to soap through twice, technique of the present invention has more advantage;
(2) the present invention is by solvent recovering system, and the solvent after aqueous solvent system is processed in raffinate carries out recycling use, has realized resource recycling, has not only saved production cost, and has alleviated environmental pollution;
(3) the present invention processes because twice aqueous solvent system replaces one high temperature twice normal temperature, and by solvent recovery Reusability repeatedly, greatly saved post processing water, reduced sewage discharge, and saved energy consumption, there is significant economic benefit and social benefit.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
1, DYED FABRICS preliminary treatment: by after cotton fabric dyeing process, the dyeing residual liquid of draining, under normal temperature after twice washings (water washing bath is than 1:10, time 10min), soap together in (Shanghai good and soaping agent AST consumption be that 1g/l, temperature are 95 ℃, time 20min, bath raio 1:10); 2, preparation acetone aqueous systems: under normal temperature condition, by acetone and water by volume 1:1 add in the encapsulation process equipment that fabric is housed, bath raio is controlled as 1:10, with soda ash adjusting pH 8 ± 0.1; 3, acetone aqueous systems is processed COTTON FABRIC: acetone aqueous systems is warmed up to 40 ℃, COTTON FABRIC is processed after 20min, residual liquid discharge, to solvent reclaimer, is then added to acetone aqueous systems by same procedure, process 20min for 40 ℃, residual liquid discharge is in reclaimer; 4, recover acetone.
Steam consumption and sewage discharge contrast following (the one ton of COTTON FABRIC of take is example) in technique of the present invention and common process processing procedure after grey cotton fabric dyeing process:
Embodiment 2
1, DYED FABRICS is soaped: by the fabric after dyeing, the dyeing residual liquid of draining, under normal temperature after twice washings (water washing bath is than 1:15, time 10min), soap (the good and AST soaping agent consumption in Shanghai is that 2g/l, temperature are 95 ℃, 20 minutes time, bath raio 1:15); 2, preparation aqueous solvent system: under normal temperature condition, add in the encapsulation process equipment that fabric is housed in the ratio 1:1.5 of absolute ethyl alcohol and water, bath raio is controlled as 1:15, regulates pH 6 ± 0.1 with glacial acetic acid; 3, absolute ethyl alcohol aqueous systems processing COTTON FABRIC: absolute ethyl alcohol aqueous systems is warmed up to 50 ℃, COTTON FABRIC is processed 30 minutes, residual liquid discharge is to solvent reclaimer, then by identical method, add again absolute ethyl alcohol aqueous systems, process 30 minutes for 50 ℃, residual liquid discharge is in reclaimer; 4, absolute ethyl alcohol reclaims.
Steam consumption and sewage discharge contrast following (the one ton of COTTON FABRIC of take is example) in technique of the present invention and common process processing procedure after black cotton fabric dyeing process:
Claims (4)
1. aqueous solvent system is removed a processing method for hydrolysed reactive dye in COTTON FABRIC, comprising:
(1), after cotton fabric dyeing process finishes, the dyeing residual liquid of draining, then washes, soaps;
(2) under normal temperature condition, by solvent and water, be, after 1:1～1:3 mixes, to regulate pH value by volume, form aqueous solvent system; Wherein solvent is acetone or absolute ethyl alcohol; PH value is 6～8;
(3) with above-mentioned aqueous solvent system to the dyeing through pretreated after COTTON FABRIC carry out twice processing, wherein first be disposed after by residual liquid discharge to solvent recovery unit, then add aqueous solvent system to carry out again second processing, solvent recovery.
2. a kind of aqueous solvent system according to claim 1 is removed the processing method of hydrolysed reactive dye in COTTON FABRIC, it is characterized in that: in described step (1), be twice washing, technological parameter is: bath raio is 1:5～1:20, and the time is 5～10min.
3. a kind of aqueous solvent system according to claim 1 is removed the processing method of hydrolysed reactive dye in COTTON FABRIC, it is characterized in that: the technological parameter of soaping in described step (1) is: bath raio is 1:5～1:20,95～100 ℃ of temperature, time 20～30min.
4. a kind of aqueous solvent system according to claim 1 is removed the processing method of hydrolysed reactive dye in COTTON FABRIC, it is characterized in that: in described step (3), aqueous solvent system treatment process parameter is: bath raio is 1:5～1:20, time 20～40min, 40～50 ℃ of temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210424757.4A CN102888766B (en) | 2012-10-30 | 2012-10-30 | Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system |
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| CN201210424757.4A CN102888766B (en) | 2012-10-30 | 2012-10-30 | Processing method for removing hydrolyzed reactive dyes on cotton knitted fabric by using solvent water system |
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| CN102888766A CN102888766A (en) | 2013-01-23 |
| CN102888766B true CN102888766B (en) | 2014-02-26 |
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| CN103469638B (en) * | 2013-09-25 | 2015-08-05 | 武汉纺织大学 | A kind of washing methods improving textile color stability |
| CN109881503A (en) * | 2019-03-06 | 2019-06-14 | 江阴职业技术学院 | A kind of nylon fabric reactive dyeing processing method |
| CN115369643B (en) * | 2022-10-21 | 2024-03-12 | 绍兴市上虞丰达染整有限公司 | Reactive dye staining-prevention low-temperature washing method |
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| JPS4841082A (en) * | 1971-09-27 | 1973-06-16 | ||
| CH1355373A4 (en) * | 1973-09-20 | 1975-08-29 | ||
| DE69528405T2 (en) * | 1994-03-30 | 2003-06-18 | Rhodia | Phosphorylation reagent, method and use |
| CN102351268A (en) * | 2011-06-28 | 2012-02-15 | 东华大学 | Method of recycling inorganic salt in dyeing wastewater |
| CN102677491B (en) * | 2012-05-03 | 2013-11-06 | 西安工程大学 | Method for preparing clean type post-processing additive for reactive dyeing cotton fabric |
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