CN101215776A - Method for bleaching black feather and cotton fabric - Google Patents
Method for bleaching black feather and cotton fabric Download PDFInfo
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- CN101215776A CN101215776A CNA2008100194711A CN200810019471A CN101215776A CN 101215776 A CN101215776 A CN 101215776A CN A2008100194711 A CNA2008100194711 A CN A2008100194711A CN 200810019471 A CN200810019471 A CN 200810019471A CN 101215776 A CN101215776 A CN 101215776A
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- bleaching
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- feather
- photocatalyst
- photochemical catalyst
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Abstract
The invention relates to a process for bleaching black feathers and cotton fiber cloth, the process comprises preprocessing ferrous iron ion solution which is dissolved with penetrating agent, utilizing photocatalyst to do photocatalysis oxidation bleaching, finally, utilizing sodium acid sulfite or low sodium sulfite solution to do reduction bleaching. The photocatalyst chooses semiconductor oxide, or heteropoly acid, or salt of heteropoly acid, or oxalate, or hydroxyl group salt, or fenton reagent and the like. The process can not only remove natural coloring matter in black feathers, but also has high white content and small damage. Meanwhile, the process has an excellent bleaching effect to cotton fiber cloth, which is green and environmental protection and has no pollution. In addition, photocatalyst can be recycled to use, which is economically feasible, and is beneficial for achieving large scale industrial production.
Description
One, technical field
The present invention relates to a kind of method for bleaching, particularly the method for bleaching of azelon and cotton fiber exactly is the method for bleaching of a kind of black feather and cotton fabric.
Two, background technology
At present, China mainly uses alkaline process to decolour to coloured feather and down, but this class method for bleaching causes the feather damage big, and whiteness is not high, and workprint has the cavity.Printing and dyeing industry generally uses clorox as oxidative bleaching agent, but studies confirm that, clorox can form organic chloride-AOX with organic matter such as auxiliary agent.AOX is poisonous and not biodegradable, and toxicity can heredity.At the discharging that contains AOX waste water, many countries have formulated strict emission control standards.The chlorine bleaching process causes very big pollution to environment.
" technical study of grey eider down decolouring bleaching " literary composition of volume the 4th phase " wool spinning science and technology " publication in August the 20th in 2003 discloses the hydrogen peroxide with 5.0～7.0mol/L; bath raio 1: 40; in the medium of pH=9; in the method for 25 ℃ of reactions of temperature decolouring in 5 hours; experiment shows; this method must be the eider down of washing; eider down is had certain injury; decolouring does not still reach desirable whiteness; be prone to jaundice; if with this method length, sheet black feather are decoloured, can only decolour to faint yellow, melanin can't be taken off.
CN1811027A discloses the method that a kind of coloured feather and down decolours and brightens fast, earlier the feather eider down is soaked in 0.05～0.1% FeSO
4Solution in, embathe with 5～6% watery hydrochloric acid then.
CN100999865A discloses a kind of method for bleaching of whole black feather, with ferrous ion fenther fabric is carried out preliminary treatment earlier, carries out selective oxidation then in hydrogen peroxide solution, carries out reducing bleach at last in the hydrosulfurous acid sodium solution.
Existing bleaching process has used a large amount of chemical reagent, and the cost height is big to fenther fabric damage, bleaches not thoroughly, and environment is had pollution.
Photocatalysis oxidation technique (Photocatalytic Oxidation) be a kind of high-level oxidation technology (advancedoxidation p rocess, AOP).The general mechanism of photochemical catalytic oxidation is:
M+hv→M(e
-+h
+) (1)
M(h
+)+H
2O
ad→M+·OH
ad+H
+ (2)
M represents photochemical catalytic oxidation agent, H in the formula
2O
AdThe hydrone that representative is active, OH
AdThe representation hydroxy free radical, e
-And h
+Represent the electronics and the hole of plane of crystal respectively.Photochemical catalyst can produce the free radical of strong oxidizing property under the condition of illumination, this free radical nearly all organic matter of thoroughly degrading, and finally generate H
2O, CO
2Deng inorganic molecules, add that light-catalyzed reaction also has the reaction condition gentleness, consersion unit is simple, secondary pollution is little, and operation is easy to control, and catalysis material is easy to get, operating cost is low, and being expected with sunshine is advantages such as reaction light source, thereby is subjected to extensive concern in recent years.
Three, summary of the invention
The present invention is intended to bleach black feather and cotton fabric, and technical problem to be solved is to reduce the use of chemical reagent under the prerequisite that guarantees bleaching effect as far as possible.
This method comprises preliminary treatment, oxidation bleaching and reducing bleach and the washing and the drying of ferrous salt solution, promptly with the ferrous ions soln that is dissolved with bleeding agent black feather or cotton fabric are carried out preliminary treatment earlier, use oxidation bleaching then, in sodium hydrogensulfite or Hydros solution, carry out reducing bleach at last.Difference with the prior art is that described oxidation bleaching is to use the photochemical catalytic oxidation bleaching of photochemical catalyst under illumination condition.Described illumination condition is meant with ultraviolet light or sunshine illumination.
Specifically so-called photocatalysis bleaching is exactly that black feather or cotton fabric are immersed in illumination 15～60min in the solution that the pH value is 2～5, photochemical catalyst concentration is 0.1～0.5g/L.Preferred 0.15～the 0.35g/L of photochemical catalyst concentration.
Experiment shows, adds hydrogen peroxide and help improving bleaching effect, hydrogen peroxide addition 40～80ml/L in above-mentioned photocatalyst solution.
Described photochemical catalyst is selected from conductor oxidate, as TiO
2, SnO
2, WO
3, Cu
2O, CdS etc.; Perhaps heteropoly acid or heteropolyacid salt are as phosphotungstic acid, silico-tungstic acid, phosphomolybdic acid, silicotungstic sodium, phosphotungstic acid potassium etc.; Perhaps oxalates is as ferric oxalate, cupric oxalate etc.; Perhaps hydroxy salt is as iron carbonyl, copper hydroxy etc.; Perhaps Fenton reagent etc.
Concrete bleaching process is as follows:
(1) preliminary treatment: exactly black feather or cotton fabric are immersed in the FeSO by 5～10g/L
4, 15～20g/L bleeding agent ST, to be made into the pH value be in 3～6 the mixed solution, bath raio 1: 20～30, normal temperature soaked 8～16 hours down, then warm water washing.
(2) photocatalysis bleaching: be exactly with pretreated black feather or cotton fabric be immersed in 0.1～0.3g/L photochemical catalyst M, hydrogen peroxide concentration is 40～80ml/L, in the solution of pH value 2～5; bath raio 1: 20～30, with daylight or UV-irradiation 15～60 minutes, use warm water washing then again.
(3) reducing bleach: be exactly black feather that photochemical catalytic oxidation was bleached or cotton fabric and be placed on 7.0～10.0g/L Hydros, 20.0～25.0g/L bleeding agent ST, 8.0～10.0g/L oxalic acid and be made into the pH value and be about 2～4 solution, temperature transfers to 30～40 ℃; bath raio 1: 20～30; soaked 1～2 hour, and used warm water washing again.
(4) drying
To drain through the feather or the cotton fabric of reducing bleach, in baking oven, dry or dry naturally.
Technology of the present invention and the difference of traditional bleaching process are to utilize sunlight catalytic degraded coloring matter, energy savings, environmentally safe, whole process flow is simple, and is easy to operate, and temperature is low, normal temperature just can carry out down, bleaching back feather whiteness height, good stability, the feather fine structure is all intact harmless.Facts have proved that reach 85% through the feather whiteness after the present invention's bleaching, injury tolerance, loss of strength are below 3%.Simultaneously cotton fabric also there is good bleaching effect.And the photochemical catalyst medicine can recycle, and economically feasible helps realizing large-scale industrial production.
Four. the specific embodiment
Embodiment 1
(1) preliminary treatment:
Use 5g/L FeSO
4, 15g/L bleeding agent ST, to be made into the pH value be 3 solution, will place wherein through the feather of washing and soak, normal temperature soaked 8 hours down, used warm water washing then 30 minutes.
(2) photocatalysis bleaching
0.2g/L photochemical catalyst TiO
2Or/and CdS, 50mlH
2O
2, with acid the pH value is transferred to 2, with the feather submergence wherein, day illumination 20 minutes was used warm water washing 10 minutes then.
(3) reducing bleach
Be made into the pH value and be about 4 solution with 7.0g/L Hydros, 18.0g/L bleeding agent ST, 8.0g/L oxalic acid, temperature transfers to 35 ℃, feather is placed in one soaked 1 hour, uses warm water washing again 20 minutes.
(4) drying
To drain through the feather of bleaching, in baking oven, dry or dry naturally.
Embodiment 2
(1) preliminary treatment
With 6g/L FeSO
4, 18g/L bleeding agent ST, to be made into the pH value be 5 solution, will place wherein through the feather of washing and soak, 40 ℃ were soaked 10 hours, then cold water flush.
(2) photocatalysis bleaching
0.25g/L the photochemical catalyst phosphotungstic acid/and silicotungstic sodium, 60mlH
2O
2, with acid the pH value is transferred to 5, with the feather submergence wherein, ultraviolet lighting 15 minutes was used warm water washing 10 minutes then.
(3) reducing bleach
8.0g/L it is 3 solution that Hydros, 20.0g/L bleeding agent ST, 10.0g/L oxalic acid are made into the pH value, under the normal temperature feather is placed in one and soaks 1 hour, uses warm water washing again 20 minutes.
(4) drying
To drain through the feather of bleaching, in baking oven, dry or dry naturally.
Embodiment 3
(1) preliminary treatment
Use 10g/L FeSO
4, 15g/L bleeding agent ST, to be made into the pH value be 3 solution, and 250 gram cotton yarns are soaked wherein, 50 ℃ were soaked 14 hours
(2) photocatalysis bleaching
0.3g/L the photochemical catalyst ferric oxalate, 70mlH
2O
2, with acid the pH value is transferred to 5, with the cotton yarn submergence wherein, ultraviolet lighting 40 minutes was used warm water washing 10 minutes then.
(3) reducing bleach
8.0g/L it is 3 solution that Hydros, 20.0g/L bleeding agent ST, 10.0g/L oxalic acid are made into the pH value, under the normal temperature cotton yarn is placed in one and soaks 2 hours, uses warm water washing again.
(4) drying
To wring out through the cotton yarn of bleaching, and in baking oven, dry or dry naturally.
Embodiment 4
(1) preliminary treatment
Use 10g/L FeSO
4, 15g/L bleeding agent ST, to be made into the pH value be 2 solution, and 250 gram cotton yarns are soaked wherein, 60 ℃ were soaked 16 hours
(2) photocatalysis bleaching
0.4g/L photochemical catalyst copper hydroxy or Fenton reagent, 80mlH
2O
2, with acid the pH value is transferred to 5, add wherein the cotton yarn submergence, day illumination 60 minutes was used warm water washing 10 minutes then.
(3) reducing bleach
8.0g/L it is 3 solution that Hydros, 20.0g/L bleeding agent ST, 10.0g/L oxalic acid are made into the pH value, under the normal temperature cotton yarn is placed in one and soaks 2 hours, uses warm water washing again.
(4) drying
To wring out through the cotton yarn of bleaching, and in baking oven, dry or dry naturally.
Claims (5)
1. the method for bleaching of black feather and cotton fabric, comprise preliminary treatment, oxidation bleaching and reducing bleach and the washing and the drying of ferrous salt solution, it is characterized in that: described oxidation bleaching is to use the photochemical catalytic oxidation bleaching of photochemical catalyst under the illumination condition of ultraviolet light or sunshine.
2. method for bleaching according to claim 1 is characterized in that: described photochemical catalytic oxidation bleaching be 2～5 in the pH of solution value, photochemical catalyst concentration is 0.1～0.5g/L, light application time 15～60min.
3. method for bleaching according to claim 1 and 2 is characterized in that: the concentration 0.15～0.35g/L of photochemical catalyst.
4. method for bleaching according to claim 3 is characterized in that: it is the hydrogen peroxide of 40～80ml/L that concentration is arranged in the photocatalyst solution.
5. according to claim 1 or 4 described method for bleaching, it is characterized in that: described photochemical catalyst is selected from conductor oxidate or heteropoly acid or heteropolyacid salt or oxalates or hydroxy salt or Fenton reagent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194711A CN101215776A (en) | 2008-01-18 | 2008-01-18 | Method for bleaching black feather and cotton fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194711A CN101215776A (en) | 2008-01-18 | 2008-01-18 | Method for bleaching black feather and cotton fabric |
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| Publication Number | Publication Date |
|---|---|
| CN101215776A true CN101215776A (en) | 2008-07-09 |
Family
ID=39622281
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100194711A Pending CN101215776A (en) | 2008-01-18 | 2008-01-18 | Method for bleaching black feather and cotton fabric |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858033A (en) * | 2010-06-04 | 2010-10-13 | 上海里奥纤维企业发展有限公司 | Fiber bleaching method |
| CN102154838A (en) * | 2011-01-13 | 2011-08-17 | 东华大学 | Method for pre-treating cotton woven fabric by adopting catalysis of phosphotungstic acid heteropolyacid |
| CN102720052A (en) * | 2012-07-02 | 2012-10-10 | 北京泛博化学股份有限公司 | Method for bleaching black feathers and adopted bleaching agent, bleaching auxiliary and bleacher |
| CN102817227A (en) * | 2012-08-14 | 2012-12-12 | 安徽舒城县翰文运动用品有限责任公司 | Feather decolorization treatment process |
| CN103243543A (en) * | 2013-05-27 | 2013-08-14 | 宁夏荣昌绒业集团有限公司 | Decoloration method of colored cashmere loose fiber |
| CN106460343A (en) * | 2014-05-20 | 2017-02-22 | 佐治亚-太平洋消费产品有限合伙公司 | Bleaching and shive reduction process for non-wood fibers |
| CN108350292A (en) * | 2015-08-21 | 2018-07-31 | 北卡罗来纳州立大学 | Method for oxidation for making textile material decolourize |
| US10640914B2 (en) | 2015-09-24 | 2020-05-05 | North Carolina State University | Method for decolorizing textile materials |
| US10711399B2 (en) | 2014-05-20 | 2020-07-14 | Gpcp Ip Holdings Llc | Bleaching and shive reduction process for non-wood fibers |
| US10844538B2 (en) | 2014-05-20 | 2020-11-24 | Gpcp Ip Holdings Llc | Bleaching and shive reduction process for non-wood fibers |
-
2008
- 2008-01-18 CN CNA2008100194711A patent/CN101215776A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858033A (en) * | 2010-06-04 | 2010-10-13 | 上海里奥纤维企业发展有限公司 | Fiber bleaching method |
| CN101858033B (en) * | 2010-06-04 | 2012-08-22 | 上海里奥纤维企业发展有限公司 | Fiber bleaching method |
| CN102154838A (en) * | 2011-01-13 | 2011-08-17 | 东华大学 | Method for pre-treating cotton woven fabric by adopting catalysis of phosphotungstic acid heteropolyacid |
| CN102154838B (en) * | 2011-01-13 | 2012-11-07 | 东华大学 | Method for pre-treating cotton woven fabric by adopting catalysis of phosphotungstic acid heteropolyacid |
| CN102720052A (en) * | 2012-07-02 | 2012-10-10 | 北京泛博化学股份有限公司 | Method for bleaching black feathers and adopted bleaching agent, bleaching auxiliary and bleacher |
| CN102720052B (en) * | 2012-07-02 | 2014-07-02 | 北京泛博化学股份有限公司 | Method for bleaching black feathers and adopted bleaching agent, bleaching auxiliary and bleacher |
| CN102817227A (en) * | 2012-08-14 | 2012-12-12 | 安徽舒城县翰文运动用品有限责任公司 | Feather decolorization treatment process |
| CN103243543A (en) * | 2013-05-27 | 2013-08-14 | 宁夏荣昌绒业集团有限公司 | Decoloration method of colored cashmere loose fiber |
| CN106460343A (en) * | 2014-05-20 | 2017-02-22 | 佐治亚-太平洋消费产品有限合伙公司 | Bleaching and shive reduction process for non-wood fibers |
| US10640899B2 (en) | 2014-05-20 | 2020-05-05 | Gpcp Ip Holdings Llc | Bleaching and shive reduction process for non-wood fibers |
| US10711399B2 (en) | 2014-05-20 | 2020-07-14 | Gpcp Ip Holdings Llc | Bleaching and shive reduction process for non-wood fibers |
| US10844538B2 (en) | 2014-05-20 | 2020-11-24 | Gpcp Ip Holdings Llc | Bleaching and shive reduction process for non-wood fibers |
| CN108350292A (en) * | 2015-08-21 | 2018-07-31 | 北卡罗来纳州立大学 | Method for oxidation for making textile material decolourize |
| US11001961B2 (en) | 2015-08-21 | 2021-05-11 | North Carolina State University | Oxidative method for decolorizing textile materials |
| CN108350292B (en) * | 2015-08-21 | 2021-08-10 | 北卡罗来纳州立大学 | Oxidation process for decolorizing textile materials |
| US10640914B2 (en) | 2015-09-24 | 2020-05-05 | North Carolina State University | Method for decolorizing textile materials |
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Open date: 20080709 |