CN86103060A - The bleaching agent of forming by permanganate and reducing substances - Google Patents
The bleaching agent of forming by permanganate and reducing substances Download PDFInfo
- Publication number
- CN86103060A CN86103060A CN198686103060A CN86103060A CN86103060A CN 86103060 A CN86103060 A CN 86103060A CN 198686103060 A CN198686103060 A CN 198686103060A CN 86103060 A CN86103060 A CN 86103060A CN 86103060 A CN86103060 A CN 86103060A
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- bleaching
- reducing substances
- potassium permanganate
- permanganate
- bleaching agent
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Abstract
The invention provides the bleaching agent that papermaking, chemical fibre, weaving etc. are used.This agent is by potassium permanganate and reducing substances, oxalic acid, and sodium oxalate, hydroquinones (and catalyst sulfuric acid manganese) or vitamin C etc. are formed.Method for bleaching is: will be put by drift and soak in 30～40 ℃ the potassium permanganate solution after dark brown, and be dipped into the complete obiteration of potassium permanganate color with the aqueous solution of reducing substances.Repeated multiple times like this is until desired whiteness.This bleaching process is to carry out under nontoxic, pollution-free and the simple situation of equipment.
Description
The invention belongs to the field of chemical industry bleaching.This bleaching agent is applicable to that all celluloses such as papermaking, chemical fibre, weaving and cellulose are the bleaching of finished product or other materials of raw material.
The bleaching agent that was used for papermaking, chemical fibre modern age, great majority are to adopt clorox.The chlorination bleaching produces poisonous chlorination phenols, causes denaturing compounds (as chloracetone) and carcinogenic substance (chloroform) etc.; Seriously endanger workers'health and contaminated environment.The chlorination bleaching is also very serious to the corrosion of equipment.Thereby people wish to have additive method replacement chlorination to bleach way back.Point out that in the association with pulp bleaching international conference that U.S. PortLand holds great majority are engaged in the researcher of chlorine-free bleaching May 24～26 nineteen eighty-two, and its method all is to adopt oxygen, bromine oxygen or hydrogen peroxide to make bleaching agent, and problem is the cost height.So whole bleaching field is still being ruled in the chlorination bleaching.
In order to make paper-making industry and chemical fibre already break away from the chlorination bleaching, in order under the simple condition of equipment, to carry out nontoxic, pollution-free, free from corrosion bleaching process; In order to make new bleaching more economically, efficiently than old bleaching, purpose of the present invention just.
Summary of the invention is such, the consisting of of bleaching agent: permanganate potassium permanganate is strong oxidizer.Reducing substances oxalic acid, sodium oxalate, hydroquinones or vitamin C etc.All can promptly reduce the compound of potassium permanganate or mixture and can use as the reducing substances of this bleaching agent.Select the sort of reducing substances, depend on its cost.The principle of this invention is: carried out OR chemical reaction in the thing and the material decolouring is bleached by bleaching.When using as reducing substances with oxalic acid, sodium oxalate, hydroquinones, also essential adding manganese sulfate, photographic process powder (compositions such as hydroquinones, sodium sulfite, sodium carbonate, potassium bromide) or other materials are as catalyst.
Invention is achieved in that soaks in 0.2～2% the potassium permanganate solution that will be put by albic material (pulp) under the temperature of 30～40 degree Celsius after dark brown, squeeze remove surplus liquid after, put 1～3% oxalic acid and 0.2～0.5% manganese sulfate solution into; Or 1～3% sodium oxalate and 0.2～0.3% manganese sulfate solution; Or 1～3% photographic process powder liquid, or the manganese sulfate solution of 1～3% hydroquinones, oxalic acid and 0.2～0.3% is dipped to the complete obiteration of potassium permanganate color, squeezes and removes surplus liquid, soaks with potassium permanganate solution again.Carry out repeatedly so repeatedly, up to being reached required whiteness by the bleaching thing.
Embodiment provides: the rice straw pulp after the bleaching alkalization clean dry needs potassium permanganate 1.4 grams for 1 jin, oxalic acid 4.7 grams and manganese sulfate 0.9 gram, and 24 jin in shared water acts on 6 times repeatedly, time-consuming 439 minutes.Its whiteness is the same with new absorbent cotton.Get 53.1% fiber product after floating.
Embodiment provides: bleach old cotton 1 jin, with potassium permanganate 0.5 gram, oxalic acid 0.6 gram, hydroquinones 0.8 gram, manganese sulfate 0.12 gram, shared water is 8.7 jin, and 2 times repeatedly, time-consuming 104 minutes, its whiteness was the same with new absorbent cotton.Get 92.3% product after floating.
The present invention uses, and equipment is simple, processing ease. The little industry of big factory all can be used. Nontoxic, pollution-free, nothing corrosion, water consumption is few, and cellulose loss is few; Also be convenient to the recovery to old metal such as manganese. Connect regenerant and calculate, cost is lower than Chlorinated Bleaching.
The world today, paper mill, chemical fibre factory spread all over earth various places. The present invention will be the important breakthrough of bleaching technology, and its economic benefit also is beyond measure.
Claims (4)
1, the bleaching agent of being made up of permanganate and reducing substances is characterized in that: permanganate is a potassium permanganate; Reducing substances can be: oxalic acid, deep sour sodium, all strong reductants such as hydroquinones or vitamin C, the also strong reductant that can be made up of other compounds or mixture.
2, bleaching agent according to claim 1 is characterized in that: using the concentration of potassium permanganate during bleaching is 0.2～2%, oxalic acid, and sodium oxalate, hydroquinones or ascorbic concentration can be 1～3%.Also can be according to the concentration of using preparation to be fit to.
3, according to claim 1 and 2 described bleaching agents, it is characterized in that: in the aqueous solution of reducing substances, a certain amount of manganese sulfate of also essential adding, photographic process powder (compositions such as hydroquinones, sodium sulfite, sodium carbonate, potassium bromide) or other materials are as catalyst.
4, bleaching agent according to claim 1, it is characterized in that: using method is, with the aqueous solution of potassium permanganate by drift (pulp) soak into under the temperature of 30～40 degree Celsius dark brown after, be dipped into the color complete obiteration of potassium permanganate again with the aqueous solution of the reducing substances that contains catalyst.Repeated multiple times like this is up to reached desired whiteness by drift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198686103060A CN86103060A (en) | 1986-04-27 | 1986-04-27 | The bleaching agent of forming by permanganate and reducing substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198686103060A CN86103060A (en) | 1986-04-27 | 1986-04-27 | The bleaching agent of forming by permanganate and reducing substances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86103060A true CN86103060A (en) | 1987-04-22 |
Family
ID=4801931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686103060A Pending CN86103060A (en) | 1986-04-27 | 1986-04-27 | The bleaching agent of forming by permanganate and reducing substances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86103060A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628071A (en) * | 2012-01-16 | 2012-08-08 | 兰州理工大学 | Preparation method of decolorized squid skin collagen |
| CN102131908B (en) * | 2008-08-30 | 2013-02-20 | 科莱恩金融(Bvi)有限公司 | Bleach catalyst mixtures consisting of manganese salts and oxalic acid or the salts thereof |
| CN105256529A (en) * | 2014-06-30 | 2016-01-20 | 耿云花 | Dyeing method of vat dye for pure cotton fabric |
| CN105507058A (en) * | 2015-12-19 | 2016-04-20 | 北海光利彩色印刷有限公司 | Production technology for kraft liner board |
| CN105568736A (en) * | 2015-12-19 | 2016-05-11 | 北海光利彩色印刷有限公司 | Manufacture process of brown paper |
| 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 |
| WO2019081290A1 (en) * | 2017-10-25 | 2019-05-02 | CHT Germany GmbH | Method for removing manganese oxide deposits from textile surfaces |
| 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 |
-
1986
- 1986-04-27 CN CN198686103060A patent/CN86103060A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131908B (en) * | 2008-08-30 | 2013-02-20 | 科莱恩金融(Bvi)有限公司 | Bleach catalyst mixtures consisting of manganese salts and oxalic acid or the salts thereof |
| CN102628071A (en) * | 2012-01-16 | 2012-08-08 | 兰州理工大学 | Preparation method of decolorized squid skin collagen |
| CN102628071B (en) * | 2012-01-16 | 2013-10-30 | 兰州理工大学 | Preparation method of decolorized squid skin collagen |
| CN110284364A (en) * | 2014-05-20 | 2019-09-27 | Gpcp知识产权控股有限责任公司 | The bleaching and smoits reduction method of non-wood-fibred |
| 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 |
| CN105256529A (en) * | 2014-06-30 | 2016-01-20 | 耿云花 | Dyeing method of vat dye for pure cotton fabric |
| CN105507058A (en) * | 2015-12-19 | 2016-04-20 | 北海光利彩色印刷有限公司 | Production technology for kraft liner board |
| CN105568736A (en) * | 2015-12-19 | 2016-05-11 | 北海光利彩色印刷有限公司 | Manufacture process of brown paper |
| CN105507058B (en) * | 2015-12-19 | 2017-08-04 | 宁波远志立方能源科技有限公司 | The production technology of ox-hide card |
| WO2019081290A1 (en) * | 2017-10-25 | 2019-05-02 | CHT Germany GmbH | Method for removing manganese oxide deposits from textile surfaces |
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