CN102174756A - Method for preparing chemical fiber pulp - Google Patents
Method for preparing chemical fiber pulp Download PDFInfo
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- CN102174756A CN102174756A CN 201010609338 CN201010609338A CN102174756A CN 102174756 A CN102174756 A CN 102174756A CN 201010609338 CN201010609338 CN 201010609338 CN 201010609338 A CN201010609338 A CN 201010609338A CN 102174756 A CN102174756 A CN 102174756A
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Abstract
The invention relates to a method for preparing chemical fiber pulp, belonging to the field of chemical fiber pulp manufacturing in the spinning industry. The invention aims at solving the problems that a cooking additive cannot be used for cooking chemical fiber pulp in the traditional cooking technology and the traditional cooking technology is not environment-friendly and the like, and provides a method for preparing chemical fiber pulp by using an environment-friendly compound cooking additive. The method comprises the processes of opening cotton, preparing the additive, cooking and the like; the method can be used for emulsifying and removing wax, protein and fat in the cooking process of the chemical fiber pulp and has the advantages of improving the osmosis and dispersion of medicine liquid during cooking, controlling the decomposition speed of the cellulose, improving the alpha cellulose content, selectively removing a chromophoric group, improving half-stuff whiteness and bleachability, reducing LCC (Lignin-Carbohydrate Complex) and others, improving the chemical reaction performance and effectively lowering the raw material consumption and reducing the COD (Chemical Oxygen Demand), chroma and other indexes of the spent liquid during cooking.
Description
Technical field
The present invention relates to a kind of method for preparing purified pulp, the purified pulp that belongs in the textile industry is made the field.
Background technology
In the production of pulp for chemical fabrics, no matter use wood, bamboo, cotton which kind of raw material, its cooking process is extremely important, and the quality of cooking quality directly has influence on the processing performance of pulp in preparation of chemical fibre viscose glue and spinning process.Fall requirement poly-, that purify, improve reactivity worth for reaching, in existing various technological processes, all embodied and heavily steamed the characteristics of gently floating, thereby can find out the important function of cooking process in pulp for chemical fabrics is produced.
In existing boiling technology, digesting assistant is more single, has plenty of accelerated reaction, has plenty of the controlling fiber degraded, have plenty of the infiltration of promotion, disperse, and substantially all be to be used for the paper-making pulping process, for the boiling link in the purified pulp preparation, do not have the application of digesting assistant, more do not have the application of the composite digesting assistant of environment-friendly type.
As the production of purified pulp, require the degree of polymerization that reaches moderate, the higher fine content of first, higher whiteness, lower grey iron content, good chemical reaction performance.Utilize conventional auxiliary agent and pulping process, be difficult to reach above target.
Application number is 03114289.3, and the patent of invention that name is called " digesting assistant in use for papermaking " discloses a kind of digesting assistant in use for papermaking on April 27th, 2004, aims to provide a kind of digesting assistant in use for papermaking that improves pulp yield, shortening digestion time, improves pulp brightness.Digesting assistant in use for papermaking of the present invention is made up of polyoxyethylene alkyl ether, sodium alkyl sulfonate, urea, anthraquinone, anhydrous sodium sulfate, sulfuric acid and water, and this auxiliary agent replaces akali sulphide, anthraquinone and derivative thereof in the slurry digestion process.
Above-mentioned digesting assistant is mainly used in paper industry, and papermaking reduces fiber degradation as far as possible for the intensity of assurance fiber and the performance of paper when boiling, keeps half fibre as far as possible.Thereby digesting assistant in use for papermaking also designs for this reason, and it is used for purified pulp when producing, and can't satisfy the quality requirement of the moderate degree of polymerization of chemical fibre slurry, the fine content of higher first, low grey iron content, good chemical reactivity worth.
Summary of the invention
The present invention is intended to solve in the above-mentioned existing boiling technology, and digesting assistant can not be used for the purified pulp boiling, and problem such as not enough environmental protection, and a kind of method for preparing purified pulp that adopts the environmental protection compound digesting assistant is provided.
In order to realize the foregoing invention purpose, concrete technical scheme of the present invention is as follows:
A kind of method for preparing purified pulp is characterized in that: comprise following processing step:
A, opener: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 3-20%, magnesium sulfate 1-10%, tetrahydro-anthraquinone 30-60%, neopelex 5-30%, ligninase 1-10%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 0.3-5% joins in the auxiliary agent dissolving tank that compound auxiliary weight 4-7 water doubly is housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 100-150g/l dilute, obtain the alkali lye that concentration is 40-100g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 60-100 ℃, be incubated 30-60min; When boiling is warmed up to 140-170 ℃, insulation 80-150min, obtaining viscosity is the boiling half stuff of 9.5-12.8mpa.s;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
The useful technique effect that the present invention brings:
The composite digesting assistant of environment-friendly type of the present invention is a kind of based on inorganic digesting assistant, organic digesting assistant and biology enzyme system auxiliary agent, the complex of composite a certain amount of anion surfactant, its main component is by inorganic digesting assistant sodium sulfite and magnesium sulfate, organic digesting assistant tetrahydro-anthraquinone, biological enzyme formulation ligninase, anionic surfactant sodium dodecylbenzene sulfonate.This auxiliary agent agent can solve in the purified pulp boiling the emulsification of wax, protein and fat, remove, improve infiltration, the dispersion of cooking liquor, the degradation speed of controlling fiber element improves the fine content of first, optionally remove chromophoric group and improve half stuff whiteness and bleachability, reduce existence raising chemical reaction performances such as LCC, the effective amount of cutting down the consumption of raw materials reduces indexs such as the COD of cooking waste liquor and colourity.
One, the beneficial effect of each component of digesting assistant:
1, sodium sulfite can improve yield and product first fibre in the caustic soda boiling.Its key reaction mechanism is to form alkali stable metasaccharinic acid terminal groups at the terminal aldehyde radical of cellulose, thereby stops cellulosic peeling reaction, makes the fine raising of yield and first;
2, magnesium sulfate can form stable complex to the cellulose oxidation thing, thereby avoids β-alcoxyl to eliminate reaction and do not carry out alkaline oxygenated degraded, can effectively protect the first fibre;
3, anthraquinone can be oxidized to carboxyl to the recessive aldehyde radical on the carbohydrate molecule and avoid peeling reaction in boiling, improves yield, and anthraquinone is reduced to anthrahydroquinone; The anthrahydroquinone ion can react with the methylene quinone structure of lignin macromolecule simultaneously, provides electronics to impel with beta-aromatic ehter bond in the lignin molecule and ruptures rapidly, quicken the lignin stripping, and anthrahydroquinone is oxidized to anthraquinone;
4, ligninase helps decomposition and the stripping of lignin and LCC, improves half stuff whiteness and bleachability;
5, neopelex is a kind of anion surfactant, has functions such as infiltration, emulsification, dispersion, foaming, washing decontamination, can effectively improve fully contacting of each chemical agent of boiling and fiber, improves reaction uniformity.
Two, practical application:
1, the present invention has reduced the raw materials consumption resource, has reduced pollutant emission.Saved the environment of resource, protection effectively;
2, the present invention is owing to provide a kind of environment-friendly type compound auxiliary that is used for the purified pulp preparation, create the production new technology of a kind of efficient, low consumption, environmental protection, realize to reduce cotton linter consumption, reduce Zheng Zhu ?liquid COD and colourity, the purified pulp product of using environment-friendly type compound auxiliary provided by the invention production is subjected to affirming of user, opened up purified pulp production and economized on resources, reduced the innovative technology of pollutant emission, thereby reduced cost, environmental;
3, the use environment-friendly type compound auxiliary of the present invention's proposition prepares the boiling method of purified pulp, effectively realize low cost, the environmental protection production that purified pulp is produced, promote the cellulosic profit to rise when having set up the perfect adaptation made fiber pulp boiling of a cover, improve alkali lye rapidly to cellulosic infiltration, the brand-new production technology of accelerating delignification, realization makes the rapid stripping of non-cellulosic impurities such as lignin, pectin, wax, simultaneously the reducibility radical oxidation of fibrous carbon hydrate can be become the fructose terminal groups, suppress peeling reaction, minimizing improves yield to cellulosic degraded;
4, use the present invention, saved production cost in process of production, significantly reduce the discharging of pollutant, improved quality, particularly reactive percent of pass improves greatly;
5, the present invention except that realize industrialized production, reduce cost, the direct economic benefit such as economical environment-protective expense; the discharging that reduces pollutant will improve source quality; the direct economy that the influence that protection brings to social environment exceeds its production far away is worth; to promoting the industry industry technology upgrade, lifting industry profit and to improve the environmental protection situation of far-reaching significance.
The specific embodiment
Embodiment 1
A, opener: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 3%, magnesium sulfate 10%, tetrahydro-anthraquinone 50%, neopelex 30%, ligninase 7%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 0.3% joins in the auxiliary agent dissolving tank of the water that 4 times of compound auxiliary weight are housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 100g/l dilute, obtain the alkali lye that concentration is 40g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 60 ℃, be incubated 30min; When boiling is warmed up to 140 ℃, insulation 80min, obtaining viscosity is the boiling half stuff of 9.5mpa.s;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
Embodiment 2
A, opener: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 20%, magnesium sulfate 1%, tetrahydro-anthraquinone 60%, neopelex 15%, ligninase 4%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 5% joins in the auxiliary agent dissolving tank of the water that 7 times of compound auxiliary weight are housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 150g/l dilute, obtain the alkali lye that concentration is 100g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 100 ℃, be incubated 60min; When boiling is warmed up to 170 ℃, insulation 150min, obtaining viscosity is the boiling half stuff of 12.8mpa.s;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
Embodiment 3
A, opener: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 20%, magnesium sulfate 10%, tetrahydro-anthraquinone 55%, neopelex 5%, ligninase 10%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 2.7% joins in the auxiliary agent dissolving tank of the water that 5 times of compound auxiliary weight are housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 125g/l dilute, obtain the alkali lye that concentration is 70g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 80 ℃, be incubated 45min; When boiling is warmed up to 155 ℃, insulation 125min, obtaining viscosity is the boiling half stuff of 11.2mpa.s;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
Embodiment 4
A, opener: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 20%, magnesium sulfate 10%, tetrahydro-anthraquinone 30%, neopelex 30%, ligninase 10%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 5% joins in the auxiliary agent dissolving tank of the water that 4 times of compound auxiliary weight are housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 140g/l dilute, obtain the alkali lye that concentration is 55g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 70 ℃, be incubated 55min; When boiling is warmed up to 160 ℃, insulation 110min, obtaining viscosity is the boiling half stuff of 10.5mpa.s;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
Embodiment 5
In the cooking process of the preparation of purified pulp, add auxiliary agent and the not contrast of adding assistant.
Testing equipment: digester, jacket steam digester, rotary spherical digester, join alkali bucket, feeding system, beater, handshcet former, pattern flash dryer etc.
Under the identical situation of other technology, add auxiliary agent and the comparing result of adding assistant (mean value) not.
Result of the test shows, under the identical situation of other technology, adds auxiliary agent than the semi-finished product first that does not add auxiliary agent is fine and improves 0.6%, and ash reduces by 0.07%, and irony reduces 8ppm, and the COD of black liquor, colourity reduce by 20.8%, 7.3% respectively; Finished product first fibre improves 0.5% after making used additives, whiteness improves 3%, and ash reduces by 0.03%, and irony reduces 4ppm, and the reactivity worth percent of pass improves 15%, and short flannel consumption on average reduces by 2.17%, has very obvious effects after making used additives.
Embodiment 6
The composite digesting assistant of environment-friendly type is to the influence of cotton linter consumption.
Make the influence of used additives with statistics contrast in producing to unit product cotton linter consumption.
Unit product cotton linter consumption situation (unit: ton/ton pulp)
As can be seen from the above table, make used additives after, unit product cotton linter unit product consumption on average reduces by 0.03 ton, the reduction amplitude is 2.17%.
Claims (3)
1. method for preparing purified pulp is characterized in that: comprise following processing step:
A, opener: cotton linter is carried out opener;
B, configuration environmental protection boiling compound auxiliary: sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, neopelex, ligninase are taken by weighing according to following percentage by weight respectively: sodium sulfite 3-20%, magnesium sulfate 1-10%, tetrahydro-anthraquinone 30-60%, neopelex 5-30%, ligninase 1-10%; Sodium sulfite, magnesium sulfate, tetrahydro-anthraquinone, the neopelex of solid phase are evenly mixed, be mixed with compound auxiliary;
C, configuration environmental protection boiling compound auxiliary liquid: with weight is that the compound auxiliary of cotton linter weight 0.3-5% joins in the auxiliary agent dissolving tank that compound auxiliary weight 4-7 water doubly is housed, add the ligninase that takes by weighing among the step B again, stirring and dissolving is even, and it is stand-by to form environmental protection boiling compound auxiliary liquid;
The mixed liquor of D, preparation alkali lye and environmental protection compound digesting assistant liquid: the environmental protection boiling compound auxiliary liquid that obtains among the step C joined in the sodium hydroxide solution that concentration is 100-150g/l dilute, obtain the alkali lye that concentration is 40-100g/l and the mixed liquor of environmental protection compound digesting assistant liquid, stand-by;
E, boiling: the alkali lye of the cotton linter behind the opener in the steps A and step D preparation is carried out boiling with the mixed liquor of environmental protection boiling compound auxiliary liquid, when boiling is warmed up to 60-100 ℃, be incubated 30-60min; When boiling was warmed up to 140-170 ℃, insulation 80-150min obtained the boiling half stuff;
F, according to routine techniques to the boiling half stuff bleach, washing and finished product manufacture paper with pulp the purified pulp that obtains conforming to quality requirements.
2. a kind of method for preparing purified pulp according to claim 1 is characterized in that: be specially at the opener described in the steps A: cotton linter is added in the opener, after big or small licker-in is discerped, be fed into cyclone separator with wind.
3. a kind of method for preparing purified pulp according to claim 1 is characterized in that: the viscosity at the boiling half stuff described in the step e is 9.5-12.8mpa.s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010609338 CN102174756B (en) | 2010-12-28 | 2010-12-28 | Method for preparing chemical fiber pulp |
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| CN 201010609338 CN102174756B (en) | 2010-12-28 | 2010-12-28 | Method for preparing chemical fiber pulp |
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| CN102174756A true CN102174756A (en) | 2011-09-07 |
| CN102174756B CN102174756B (en) | 2012-11-21 |
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| CN 201010609338 Expired - Fee Related CN102174756B (en) | 2010-12-28 | 2010-12-28 | Method for preparing chemical fiber pulp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887539A (en) * | 2016-04-21 | 2016-08-24 | 邯郸市祥源特种纤维有限公司 | Method and system for producing pure cotton pulp in dry cutting method |
| CN115637603A (en) * | 2022-11-14 | 2023-01-24 | 山东银鹰股份有限公司 | Method for preparing pulp from waste pure cotton fabric, product obtained by method and application of product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49108301A (en) * | 1973-02-20 | 1974-10-15 | ||
| CN1880575A (en) * | 2006-05-08 | 2006-12-20 | 宜宾丝丽雅股份有限公司 | Composite cellulose viscose filament yarn with composite cellulose pulp as raw materials made of cotton, wood and bamboo mixture and preparation method thereof |
| CN101413146A (en) * | 2008-11-27 | 2009-04-22 | 宜宾长毅浆粕有限责任公司 | Boiling method for preparing cotton linter dissolving pulp by using composite additive |
| CN101638810A (en) * | 2009-08-20 | 2010-02-03 | 襄樊源力生物科技有限公司 | Method for high effective environmental pollution energy conservation purified cotton production |
-
2010
- 2010-12-28 CN CN 201010609338 patent/CN102174756B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49108301A (en) * | 1973-02-20 | 1974-10-15 | ||
| CN1880575A (en) * | 2006-05-08 | 2006-12-20 | 宜宾丝丽雅股份有限公司 | Composite cellulose viscose filament yarn with composite cellulose pulp as raw materials made of cotton, wood and bamboo mixture and preparation method thereof |
| CN101413146A (en) * | 2008-11-27 | 2009-04-22 | 宜宾长毅浆粕有限责任公司 | Boiling method for preparing cotton linter dissolving pulp by using composite additive |
| CN101638810A (en) * | 2009-08-20 | 2010-02-03 | 襄樊源力生物科技有限公司 | Method for high effective environmental pollution energy conservation purified cotton production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887539A (en) * | 2016-04-21 | 2016-08-24 | 邯郸市祥源特种纤维有限公司 | Method and system for producing pure cotton pulp in dry cutting method |
| CN115637603A (en) * | 2022-11-14 | 2023-01-24 | 山东银鹰股份有限公司 | Method for preparing pulp from waste pure cotton fabric, product obtained by method and application of product |
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| CN102174756B (en) | 2012-11-21 |
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