CN1055975A - Produce the new method of cotton pulp with waste cotton - Google Patents
Produce the new method of cotton pulp with waste cotton Download PDFInfo
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- CN1055975A CN1055975A CN 90102482 CN90102482A CN1055975A CN 1055975 A CN1055975 A CN 1055975A CN 90102482 CN90102482 CN 90102482 CN 90102482 A CN90102482 A CN 90102482A CN 1055975 A CN1055975 A CN 1055975A
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Abstract
A kind of manufacture method of cotton fiber paper pulp, it is to be raw material with the waste cotton, in pulping process flow, without rotary spherical digester, without boiling, without caustic soda, raw material is directly pulled an oar, carry out single hop or two sections or multistage bleaching behind the pulp washing, become pulp brightness reach 75% and more than.This new method has alleviated the pollutant emission load of slurrying factory greatly, has saved caustic soda or other chemical industry medicine, has saved the energy, reduced cost, slurrying yield rate height, the cotton pulp intensity height of Sheng Chaning in this way, good water absorption becomes the paper softness, is applicable to the multiple paper of manufacturing paper with pulp.
Description
The invention relates to a kind of production method of fibre pulp, particularly is the new method of raw material production fibre pulp with the waste cotton.
The present invention comprises this said waste cotton: so cotton (quilts in the old cotton-wadded quilt of old cotton cloth).Oil cotton (textile mills' leftover bits and pieces, sweepings, underfly).Sterile unginned cotton, new cotton cloth waste and cloth.Old cotton rags, clothing factory's leftover bits and pieces, cotton bar, cotton block and quilt industry, civilian other discarded cotton fibre material.
The pulping and paper-making industry is to consume the industries that industrial chemicals is many, pollution is heavy, power consumption is big, water consumption is many, and slurrying enterprise is serious especially.At present, it is no exception to be with various waste cottons that raw material is made the factory of cotton fiber paper pulp.These factories are when slurrying, and the technological process of taking usually is: boiling, pulp washing, play half stuff, bleaching.The shortcoming of this traditional handicraft is: caustic soda or other chemicals that need add 3-10% during boiling; In digestion process, need to consume a large amount of steam and be in certain airtight, in the pressure vessel, need consume a large amount of water during pulp washing, because whiteness descends behind the material cooking, it is dark red that slurry becomes, unbleached pulp is low, and the chemicals that consumes when causing bleaching increases for no reason, and forms certain bleaching difficulty for many years, researchers are being devoted to inquire into the new method of cotton fiber slurrying aspect always, in the hope of advancing industrial development.Find according to inventor's retrieval: THE TECHNICS IN PULPMAKING OF COTTON LINTER, CN87107484 cotton linter pulp treatment process and equipment that CN86102407 can contaminated solution." adopt atmospheric cooking multistage bleaching process system cotton linter paper pulp " (seeing " paper technology communication " 1979 the 4th phase 88-89 pages or leaves), the 20th page of CN86105428 low pallution method for preparation of cotton pulp under normal pressure, " paper and papermaking " the 4th phase in 1989 delivered " new development of pulp-making of cotton linter " literary composition, JP-6012991 introduced in article, the new technology of two velveteen slurrying of JP-6106388 aspect.The related new technology of above-mentioned document is being that raw material is made and made useful concentration and contribution aspect the cotton pulp with the cotton linter all.But, various waste cottons since before going out of use, be subjected to various pollutions (for example: greasy dirt, with the grease of contact skin and body fluid etc.), cause its various chemical property and cotton linter that bigger, special difficulty is arranged.In addition, the growth on cotton kind hair of its cotton fiber separately of cotton linter and various waste cottons, formation and position of living in are different, and it is bigger that its chemical constituent also differs.Cotton linter is the intensive staple fibre (seeing " paper and papermaking " the 4th phase in 1989 the 20th page of " new development of pulp-making of cotton linter " literary composition) that is grown in the cottonseed surface securely, its maturity is lower, the fibre length major part all (is being seen " pulping and paper-making handbook the third volume of a work below 3 millimeters, the 273rd page, light industry publishing house).And oil is cotton, the fibre maturity of cotton these waste cottons of event is higher, fiber is also long, major part all (is being seen " paper and papermaking " the 2nd phase in 1988 the 2nd page of " my opinion about the waste cotton boiling " literary composition and " Hebei papermaking " the 1st phase in 1989 the 9th page of " using calcium hypochlorite, the ancient cotton pulp of hydrogen peroxide bleaching " literary composition) more than 12 millimeters.In a word, various waste cottons are indiscriminately imitated above-mentioned prior art and are used for suitability for industrialized production very big difficulty is arranged.That is to say that above-mentioned prior art repetition on the pulping production line that with the waste cotton is raw material is unlikely.
The inventor is such for the retrieval of waste cotton slurrying prior art: " paper and papermaking " the 2nd phase in 1988 the 2nd page of " my opinion about the waste cotton boiling " literary composition of delivering." estimating cotton pulp " literary composition that " Hebei papermaking " the 1st phase in 1989 delivers with the calcium hypochlorite hydrogen peroxide bleaching.They all are on the traditional handicraft basis, have carried out good try on the bleaching process after digesting technoloy or boiling respectively.But, still do not break away from problems such as the consumption chemicals that cooking process itself causes in the traditional handicraft is many, seriously polluted, power consumption is big, water consumption is many.
The objective of the invention is to: providing a kind of is the new method of raw material production cotton pulp with the waste cotton, breaks away from the cooking process in the traditional handicraft, to eradicate the problems referred to above that traditional handicraft exists.
Solution of the present invention is: waste cotton is dropped in the trough-style pulp beater, and processing is then bleached in the making beating of pulp washing limit, limit again.Because not boiling has improved the whiteness of not floating natural color pulp.Waste cotton beats in the side washing of trough-style pulp beater inner edge, all contaminations of being infected with on the waste cotton fiber can be removed major part; Making beating make the fiber appearance cured fat layer cracking, come off, for soaking of bleaching medicament attacked, acted on good conditions is provided.Therefore, realize the situation that solution of the present invention also will fall, ftracture according to washing, removing degree and the cured fat pull-up of the pollutant of fiber appearance, impurity.The fact is in the industrialized production, to be difficult to observe the disposition of making beating to the fiber appearance at any time with high-power microscope; Again because, that the disposition of fiber appearance and making beating beating degree, fiber wet weight have is close, relation one to one.In other words, be to understand the treatment situation of fiber outer surface indirectly with the conventional method that detects half stuff beating degree, these two indexs of fiber wet weight.This point is not done with explanation when handling cotton linter in " CN86105428 ".Just because of this, the present invention has done more detailed research to this.The result shows: when lower, the fiber wet weight of making beating beating degree is big, because the pollutant of fiber appearance or cured fat layer etc. are keeping not processed state substantially, thereby be disadvantageous to making bleached pulp.Dropped to for 30～5 whens gram when the making beating beating degree rises to 10～35 ° of SR, fiber wet weights, can add the bleaching medicament and float slurry, and can obtain useful effect industrial.
Requirement according to the different purposes and the different whiteness of waste cotton paper pulp, the present invention also comprises in the solution of this proposition: to the bleaching of paper pulp, can adopt a certain single stage bleaching that carries out in these methods of hypochlorite or hydrogen peroxide or hydrochloric acid or sulfuric acid or thiourea dioxide, also can be to form two sections or multistage bleaching respectively with them.For example: do one section bleaching with hypochlorite 1., earlier, again with hydrochloric acid or sulfuric acid treatment; Or, do second section processing with hypochlorite more earlier with hydrochloric acid or sulfuric acid treatment.With hypochlorite do one section bleaching, do second stage bleaching with hydrogen peroxide again, then carry out acid treatment with hydrochloric acid or sulfuric acid 2., earlier.With hypochlorite do one section bleaching, do second stage bleaching with thiourea dioxide more 3., earlier.
In order to bleach effectively, the present invention also comprises in the solution of this proposition: bleaching temperature is 10～100 ℃, and bleaching time is 30 minutes～15 hours, and bleaching concentration (that is: the concentration of paper pulp during bleaching) is 2%～15%.For example: 1, when carrying out hypochlorite bleaching, bleaching temperature can be 10～40 ℃, and bleaching concentration can be 2%～15%, and bleaching time can be 30 minutes～2 hours.2, when carrying out the bleaching of hydrogen peroxide bleaching or thiourea dioxide, bleaching temperature can be 50～100 ℃, and bleaching concentration can be 2%～15%, and bleaching time can be 30 minutes～2 hours.3, when carrying out hydrochloric acid or sulfuric acid treatment, bleaching temperature can be 10～40 ℃, and bleaching concentration can be 2%～6%, and bleaching time can be 20～60 minutes.
It is as follows to finish most preferred embodiment of the present invention:
Embodiment 1:
With so cotton is a raw material, after soaking, will die cotton water or detergent solution reduce its floating force, and take out the back and drop into 5m
3Trough-style pulp beater, fall the pulp washing of washing drum while discongesting, and making beating limit, back pulp washing, clean and make the making beating beating degree to reach 10～35 ° of SR paper pulp, when fiber wet weight drops to 30～5 grams, bleachability (effective chlorine is to bone dry fiber paper pulp weight) by 0.5%～7% adds the calcium hypochlorite bleaching liquor, bleaching concentration is 2%～15%, bleaching time is 30 minutes～2 hours, bleaching temperature is a normal temperature, carry out pulp washing after floating, it becomes pulp brightness can reach 75%～80%(by GB1542-79 blue streak method, SBD whiteness instrument, later on roughly the same).
Embodiment 2:
One section bleached pulp producing according to the method for embodiment 1 with 0.5%～2%(to bone dry fiber paper pulp) hydrochloric acid did acid treatment 30 minutes, pulp brightness can be improved 0.5～3.
Embodiment 3:
One section or second stage bleaching paper pulp producing according to the method for embodiment 1 or embodiment 2, with 0.1%～2.5%(to absolute dried paper pulp) hydrogen peroxide and 0.5%～3%(to absolute dried paper pulp) NaOH and 1%～8%(to absolute dried paper pulp) sodium metasilicate (claiming waterglass, bubble flower alkali again) carry out second section or tri-stage bleaching, bleaching time is 1～3 hour, bleaching concentration is 2%～15%, and bleaching temperature is 20～100 ℃.The salt acid treatment use earlier in bleaching back, carries out pulp washing again, become pulp brightness can reach 83% reach more than.
Embodiment 4:
With oily cotton is raw material, and its water or detergent solution are soaked into, and reduces its floating force, drops into 5m
3The side washing of trough-style pulp beater inner edge is beaten, when clean, when the making beating beating degree reaches 10～35 ° of SR, fiber wet weights and drops to 30～5 grams, bleachability (effective chlorine is to absolute dried paper pulp) by 0.2%～4% adds the calcium hypochlorite bleaching liquor, bleaching concentration is 1%～6%, bleaching time is 30 minutes～90 minutes, and bleaching temperature is that 10～40 ℃ of bleachings finish the back pulp washings, its become pulp brightness reach 80% and more than, as carrying out the second stage bleaching of said method again, become pulp brightness can reach 85% and more than.
In the above-described embodiment, when raw material soaks into when dropping into beater again and handling with detergent solution earlier, better whiteness and effect have been obtained.
1., unbleached pulp improves 8～28 according to the cotton pulp that above-mentioned waste cotton pulping process is produced, the cotton pulp of producing than traditional handicraft has the following advantages:, wash well, float well. 2., become pulp brightness good and stablize, reach the requirement of relative national standards. 3., the paper intensity high-hydroscopicity that is ferreted out is good. 4., it is good to be ferreted out the paper pliability. 5., the strong adaptability of paper pulp, after screening, purified cotton, carboxymethyl cellulose also can suit to make.
1., without steam above-mentioned waste cotton pulping process has the following advantages than traditional handicraft:, save the energy, slurry per ton approximately can be saved 1.5～2 tons of steam. 2., without rotary spherical digester or other digesting apparatus, having saved found the factory investment and the ordinary maintenance of equipment. 3., slurrying factory blowdown load descends 50%～80%, sewage discharge concentration reaches or has approached state specified standards, suitably in addition other waste water control measure just can reach the pollution emission standard of national regulation. 4., because not boiling, without caustic soda or other chemical agent high-temperature process, cellulose degradation alleviates greatly, fibre strength improves, and becomes the pulp yield height, conservation, slurry consumption raw material per ton is 1.3～1.8 tons. 5., saved the required a large amount of industrial chemicals of boiling, press caustic soda and calculate, use one ton of waste cotton can save 30～100 kilograms.
Claims (8)
1, a kind of manufacture method of cotton fiber paper pulp, it is with event cotton (quilts in cotton-wadded quilt, the cotton cloth), oil cotton (textile mills' leftover bits and pieces, underfly, sweepings), the new cloth waste of cotton, cotton old rags, or other waste cotton is a raw material, it is characterized in that: raw material does not pass through boiling, but directly beat in the side washing of trough-style pulp beater limit, then bleach.
2, method according to claim 1, its feature are also that raw material drops into before the beater also can water or soak with the solution of washing agent.
3, according to claim 1 and 2 described methods, its feature also is: bleaching is to be 10～35 ° of SR in the paper pulp beating degree, and fiber wet weight is to carry out after 30～5 grams.
4, according to the described method of claim 1～3, its feature also is: bleaching can be to use the hypochlorite bleaching liquor, and bleachability is 0.5%～7%.
5, according to the described method of claim 1～4, its feature also is: can do first section bleaching with hypochlorite earlier during bleaching, add acid (hydrochloric acid or sulfuric acid) or hydrogen peroxide again and do second section bleaching processing.
6, according to the described method of claim 1～4, its feature also is: also can do first section bleaching with hypochlorite earlier during bleaching, do second section bleaching with hydrogen peroxide, then use acid (hydrochloric acid or sulfuric acid) to handle.
7, according to the described method of claim 1～4, its feature also is: pulp density is 2.0%～15% during bleaching; 10～100 ℃ of bleaching temperatures, bleaching time are 30 minutes～15 hours.
8, a kind of cotton fiber paper pulp product is characterized in that: be that raw material does not pass through boiling with the waste cotton, discongest, wash, pull an oar at beater, enter bleaching process again and bleach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102482 CN1055975A (en) | 1990-04-27 | 1990-04-27 | Produce the new method of cotton pulp with waste cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102482 CN1055975A (en) | 1990-04-27 | 1990-04-27 | Produce the new method of cotton pulp with waste cotton |
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| Publication Number | Publication Date |
|---|---|
| CN1055975A true CN1055975A (en) | 1991-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90102482 Pending CN1055975A (en) | 1990-04-27 | 1990-04-27 | Produce the new method of cotton pulp with waste cotton |
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| CN (1) | CN1055975A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077633C (en) * | 1998-08-01 | 2002-01-09 | 周湘洪 | Method of paper-making of cold pulping and bleaching using plant preparation |
| CN1085755C (en) * | 1996-09-12 | 2002-05-29 | 李学敏 | Paper-making pulping process without black liquid |
| CN101538814B (en) * | 2009-04-24 | 2011-08-17 | 厦门市特纤机械设备有限公司 | Solid waste paper pulp and manufacturing method thereof |
| CN109695095A (en) * | 2019-02-15 | 2019-04-30 | 安徽寿县银丰棉业有限责任公司 | A kind of hot melt cotton-wadded quilt production technology |
-
1990
- 1990-04-27 CN CN 90102482 patent/CN1055975A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085755C (en) * | 1996-09-12 | 2002-05-29 | 李学敏 | Paper-making pulping process without black liquid |
| CN1077633C (en) * | 1998-08-01 | 2002-01-09 | 周湘洪 | Method of paper-making of cold pulping and bleaching using plant preparation |
| CN101538814B (en) * | 2009-04-24 | 2011-08-17 | 厦门市特纤机械设备有限公司 | Solid waste paper pulp and manufacturing method thereof |
| CN109695095A (en) * | 2019-02-15 | 2019-04-30 | 安徽寿县银丰棉业有限责任公司 | A kind of hot melt cotton-wadded quilt production technology |
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