CN102174755B - Boiling assistant for preparing high polymerised pulp - Google Patents
Boiling assistant for preparing high polymerised pulp Download PDFInfo
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- CN102174755B CN102174755B CN2010106093302A CN201010609330A CN102174755B CN 102174755 B CN102174755 B CN 102174755B CN 2010106093302 A CN2010106093302 A CN 2010106093302A CN 201010609330 A CN201010609330 A CN 201010609330A CN 102174755 B CN102174755 B CN 102174755B
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Abstract
The invention relates to a boiling assistant for preparing high polymerised pulp. The assistant comprises 30-50% of sodium sulfite, 5-10% of alpha-methylanthraquinone (alpha-MAQ), 5-15% of lipase, 1-10% of hemicellulase, 1-10% of ligninase, 10-20% of diethylene triaminepentaacetic acid (DTPA) and 20-40% of sodium dodecyl benzene sulfonate. The assistant can promote the swelling of celluloses, quickly improve the permeation of alkaline liquor on celluloses, accelerate the breakage of primary walls, quickly dissolve out lignin, pectin, wax and other non-fiber impurities, improve the boiling reaction speed, oxidize the reducing groups (aldehyde terminal groups) of the cotton linter carbohydrate into various alkali-stable sugar acid terminal groups, inhibit the peeling reaction, reduce the degradation of celluloses and improve the yield.
Description
Technical field
The invention belongs to purified pulp and make the field, specifically, the present invention relates to a kind of digesting assistant for preparing high polymerised pulp.
Background technology
In the production of high polymerised pulps such as existing coinage slurry, raw material adopt three grades of cottons and I class suede more.Three grades of cotton costs of material are too high; Low but its lignin of I class suede cost, sulfuric acid insoluble matter impurity such as (cotton seed hulls, cotton boll skins) are too high.In the production of high polymerised pulps such as existing coinage slurry, boiling technology is main with conventional alkaline process of the low alkali of low temperature or oxonium base method.For three grades of cotton raw materials, above-mentioned two kinds of boiling methods all are prone to satisfy the quality requirement of coinage slurry; But for I class suede raw material, two kinds of boiling methods all are difficult to sulfuric acid insoluble matter (cotton seed hulls etc.) is removed, and cause the dust of pulp higher; Simultaneously, it is darker that the conventional alkaline process of the low alkali of low temperature boils the color and luster of back half stuff, and it is very big that pulp will reach its bleaching difficulty of ultrahigh brightness of present market demands.Though oxonium base method whiteness meets the demands easily; But its degree of polymerization is difficult to guarantee and need auxiliary agents such as adding magnesium salts and sodium metasilicate; Cause ash content too high; And that high polymerised pulp requires fibre strength is high, and the acid treatment meeting causes fibre strength to descend, so when high polymerised pulp is produced, can't take acid treatment in the conventional pulping technique except that the technology of ash content, irony.
In sum, the digesting assistant of prior art when producing high polymerised pulp is difficult to satisfy the ultrahigh brightness of present high polymerised pulp, the quality requirement of low ash, iron and higher fiber intensity.
Summary of the invention
The present invention is intended to solve the problem that digesting assistant among the high polymerised pulp preparation technology such as above-mentioned existing coinage slurry can not satisfy the requirement of ultrahigh brightness and low ash, iron and higher fiber intensity; Solve in the preparation high polymerised pulp floatingization, remove, removing of lignin, pectic substance to wax, protein, fat; The cooking liquor uniformly penetrating; The removal of sulfuric acid insoluble matter; It is darker to steam later half pulp fibres colourity, and the slurry ash content, and irony is than problems such as height.Reduce cellulosic falling as far as possible and gather, accomplish the preliminary washing of fiber, improve half stuff whiteness and bleachability, a kind of digesting assistant that satisfies high polymerised pulp technological requirement such as coinage slurry is provided.
In order to realize the foregoing invention purpose, concrete technical scheme of the present invention is following:
In order to realize the foregoing invention purpose, concrete technical scheme of the present invention is following:
A kind of digesting assistant for preparing high polymerised pulp is characterized in that: comprise following component by weight percentage:
Sodium sulfite 30-50%, Alpha-Methyl anthraquinone (α-MAQ) 5-10%, lipase 5-15%, hemicellulase 1-10%, lignin degradation enzyme 1-10%, DTPA (diethylene triamine pentaacetic acid) 10-20%, neopelex 20-40%.
A kind of digesting assistant for preparing high polymerised pulp is characterized in that: preferred, comprise following component by weight percentage:
Sodium sulfite 35-42%; Alpha-Methyl anthraquinone (the 8-10% of α-MAQ); Lipase 8-12%; Hemicellulase 7-9%; Lignin degradation enzyme 6-8%; DTPA (diethylene triamine pentaacetic acid) 15-18%; Neopelex 22-28%.
A kind of digesting assistant for preparing high polymerised pulp is characterized in that: preferred, comprise following component by weight percentage:
Sodium sulfite 37-40%; Alpha-Methyl anthraquinone (the 9-10% of α-MAQ); Lipase 9-10%; Hemicellulase 8-9%; Lignin degradation enzyme 7-8%; DTPA (diethylene triamine pentaacetic acid) 16-17%; Neopelex 25-27%.
A kind of method for preparing high polymerised pulp that adopts above-mentioned digesting assistant is characterized in that: comprise following processing step:
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: with cyclone separator and the fiber removal of impurities separator of cotton linter through series connection, when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: take by weighing sodium sulfite, Alpha-Methyl anthraquinone (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex, it is for use evenly to be hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 0.5-2% joins and auxiliary agent weight 5-8 is housed doubly, and in the auxiliary agent dissolving tank of temperature 40-50 ℃ water, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 40-60g/l dilute; Obtain the alkali lye that concentration is 20-35g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 40-50 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 25-60 ℃, be incubated 60-90min; When boiling was warmed up to 120-160 ℃, insulation 30-60min obtained the degree of polymerization and is at least 2500 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
The useful technique effect that the present invention brings:
Biology enzyme complex preparation according to the invention be a kind of be main with inorganic digesting assistant, organic digesting assistant and biology enzyme system auxiliary agent; The complex of composite a certain amount of anion surfactant, chelating agent, its main component is by inorganic digesting assistant sodium sulfite, organic digesting assistant Alpha-Methyl anthraquinone, biological enzyme formulation (lipase, hemicellulase, lignin degradation enzyme), anionic surfactant sodium dodecylbenzene sulfonate and chelating agent DTPA.This auxiliary agent can promote that cellulosic profit rises, and improves alkali lye rapidly to cellulosic infiltration, and primary wall accelerates the failure; Make the rapid strippings of non-fiber impurity such as lignin, pectin, wax; Improve cooking reaction speed, can the reducibility group (aldehyde terminal groups) of this carbohydrate of cotton linter be oxidized to the stable saccharic acid terminal groups of various alkali simultaneously, suppress peeling reaction; Minimizing improves yield to cellulosic degraded.
One, the useful technique effect of each component of digesting assistant:
1, sodium sulfite is in the caustic soda boiling, and it is fine to improve yield and product first.Its key reaction mechanism is that the aldehyde terminal groups of ability oxycellulose and hemicellulose is thereby that carboxyl stops cellulosic peeling reaction, makes the fine raising of yield and first; The effect of sulfonated lignin is also arranged, make boiling half stuff lighter color, be prone to float;
2, the Alpha-Methyl anthraquinone (α-MAQ): the protection carbohydrate, promote delignification, can improve fracture length, bursting strength, the folding strength of paper;
3, lipase works the effect of removing to the fat on short velvet fiber top layer, cured matter;
4, hemicellulase, lignin degradation enzyme play cooperative effect; Hemicellulose to the short velvet fiber surface carries out enzyme reaction in advance, opens partial L CC (condensation product of lignin and carbohydrate), increases the permeability of fiber surface; Make fiber surface loose; Present cellular, more lignins are come out, reduce restriction and shielding enzyme molecule and other soup molecules.Help decomposition and the stripping of lignin and LCC, improve half stuff whiteness and bleachability;
5, DTPA (diethylene triamine pentaacetic acid): chelating agent, chelated metal ions reduces ash, iron content in the half stuff;
6, the DBSA ammonium 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 improved the product degree of polymerization, whiteness, has reduced dirt count, has effectively improved product quality;
2, the present invention is owing to provide a kind of method for preparing high polymerised pulp with the biology enzyme complex preparation; Changed the mode of the production high polymerised pulp of traditional cotton short flannel boiling; Create the production new technology of a kind of efficient, low consumption, environmental protection, broken through harsh requirement raw material;
3, the use biology enzyme complex preparation of the present invention's proposition prepares the boiling method of high polymerised pulp; Effectively realize low cost, environmental protection production that the coinage slurry is produced, promote cellulosic profit to rise when having set up the perfect adaptation I class short flannel boiling of a cover, improve alkali lye rapidly cellulosic infiltration; Realization makes the rapid stripping of non-cellulosic impurities such as pectin, wax; Can the cotton fiber carbohydrate effectively be protected simultaneously, suppress peeling reaction, reduce cellulosic degraded; Improve the yield and the product degree of polymerization, effectively improved fibre strength;
4, the present invention is except that realizing industrialized production, reduce cost, the direct economic benefit such as economical environment-protective expense, break the raw material limitation to promoting the industry industry technology upgrade that it is of far-reaching significance to promote the profitability of industry.
The specific embodiment
Embodiment 1
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: cyclone separator is connected with fiber removal of impurities separator, and when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex are respectively according to weight percent meter: sodium sulfite 30% with sodium sulfite, Alpha-Methyl anthraquinone; Alpha-Methyl anthraquinone 10%; Lipase 5%; Hemicellulase 10%; Lignin degradation enzyme 10%; DTPA10%; It is for use that neopelex 25% evenly is hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 0.5% joins 5 times of auxiliary agent weight are housed, and in the auxiliary agent dissolving tank of the water that temperature is 40 ℃, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 40g/l dilute; Obtain the alkali lye that concentration is 20g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 40 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 25 ℃, be incubated 60min; When boiling was warmed up to 120 ℃, insulation 30min obtained the degree of polymerization and is 2500 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
Embodiment 2
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: cyclone separator is connected with fiber removal of impurities separator, and when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex are respectively according to weight percent meter: sodium sulfite 38% with sodium sulfite, Alpha-Methyl anthraquinone; Alpha-Methyl anthraquinone 5%; Lipase 15%; Hemicellulase 1%; Lignin degradation enzyme 1%; DTPA10%; It is for use that neopelex 30% evenly is hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 2% joins 8 times of auxiliary agent weight are housed, and in the auxiliary agent dissolving tank of the water that temperature is 50 ℃, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 60g/l dilute; Obtain the alkali lye that concentration is 35g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 50 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 60 ℃, be incubated 90min; When boiling was warmed up to 160 ℃, insulation 60min obtained the degree of polymerization and is 3000 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
Embodiment 3
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: cyclone separator is connected with fiber removal of impurities separator, and when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex are respectively according to weight percent meter: sodium sulfite 50% with sodium sulfite, Alpha-Methyl anthraquinone; Alpha-Methyl anthraquinone 5%; Lipase 5%; Hemicellulase 5%; Lignin degradation enzyme 5%; DTPA10%; It is for use that neopelex 20% evenly is hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 1.7% joins 6 times of auxiliary agent weight are housed, and in the auxiliary agent dissolving tank of the water that temperature is 45 ℃, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 50g/l dilute; Obtain the alkali lye that concentration is 28g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 45 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 43 ℃, be incubated 75min; When boiling was warmed up to 140 ℃, insulation 45min obtained the degree of polymerization and is 3000 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
Embodiment 4
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: cyclone separator is connected with fiber removal of impurities separator, and when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex are respectively according to weight percent meter: sodium sulfite 30% with sodium sulfite, Alpha-Methyl anthraquinone; Alpha-Methyl anthraquinone 7%; Lipase 8%; Hemicellulase 3%; Lignin degradation enzyme 2%; DTPA10%; It is for use that neopelex 40% evenly is hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 2% joins 5 times of auxiliary agent weight are housed, and in the auxiliary agent dissolving tank of the water that temperature is 50 ℃, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 40g/l dilute; Obtain the alkali lye that concentration is 35g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 50 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 60 ℃, be incubated 90min; When boiling was warmed up to 160 ℃, insulation 30min obtained the degree of polymerization and is 2500 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
Embodiment 5
A, opener: after cotton linter opened bag, send into opener, after big or small licker-in is discerped, be fed into cyclone separator with wind by conveyer belt;
B, dry method removal of impurities: cyclone separator is connected with fiber removal of impurities separator, and when wind sent, under the gravity effect, foreign material such as cotton seed hulls and cotton linter fiber were separated;
C, configuration biology enzyme complex preparation: (α-MAQ), lipase, hemicellulase, lignin degradation enzyme, DTPA (diethylene triamine pentaacetic acid), neopelex are respectively according to weight percent meter: sodium sulfite 40% with sodium sulfite, Alpha-Methyl anthraquinone; Alpha-Methyl anthraquinone 5%; Lipase 5%; Hemicellulase 4%; Lignin degradation enzyme 6%; DTPA20%; It is for use that neopelex 20% evenly is hybridly prepared into complex preparation;
The configuration of D, biology enzyme complex preparation liquid: with weight is that the complex preparation of cotton linter weight 0.6% joins 7 times of auxiliary agent weight are housed, and in the auxiliary agent dissolving tank of the water that temperature is 48 ℃, stirring and dissolving is even, and it is for use to form biology enzyme complex preparation liquid;
The mixed liquor of E, preparation alkali lye and biology enzyme complex preparation liquid: the biology enzyme complex preparation liquid that obtains among the step D joined in the sodium hydroxide solution that concentration is 55g/l dilute; Obtain the alkali lye that concentration is 20g/l and the mixed liquor of biology enzyme complex preparation liquid; Mixed liquor is warming up to 40 ℃, for use;
F, the alkali lye of the cotton linter behind the opener and step e preparation is carried out boiling with the mixed liquor of biology enzyme complex preparation liquid, when boiling is warmed up to 30 ℃, be incubated 85min; When boiling was warmed up to 160 ℃, insulation 30min obtained the degree of polymerization and is 2500 boiling half stuff;
G, according to routine techniques to the boiling half stuff is bleached, washing and finished product are manufactured paper with pulp and obtained conforming to quality requirements coinage slurry or high polymerised pulp product.
Embodiment 6
Explain in order to contrast test in the face of the work of biology enzyme complex preparation in the preparation high polymerised pulp down.
In the preparation of high polymerised pulp, add the biology enzyme complex preparation and do not add the contrast of biology enzyme complex preparation.
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 the biology enzyme complex preparation and do not add the comparing result (mean value) of biology enzyme complex preparation.
Result of the test shows, under the identical situation of other technology, adds auxiliary agent than the semi-finished product degree of polymerization that does not add auxiliary agent and improves about 120DP, and whiteness improves 5%, and ash reduces by 0.07%, and irony reduces 11ppm, and the COD of black liquor, colourity reduce by 16%, 20.6% respectively; The finished product degree of polymerization improves 220DP after making used additives, whiteness improves 5%, and dirt count reduces 30mm
2/ kg, gray iron change obviously, and short flannel consumption on average reduces by 1.6%, have very obvious effects after making used additives.
Embodiment 7
In the preparation of high polymerised pulp, add of the influence of biology enzyme complex preparation to the degree of polymerization.
Make the influence of used additives with statistics contrast in producing to the finished product degree of polymerization.
Finished product degree of polymerization situation (unit: DP)
Can find out from last table, make used additives after, the average degree of polymerization 220DP that risen, ascensional range is 10%.
Claims (1)
1. digesting assistant for preparing high polymerised pulp is characterized in that: be made up of following component by weight percentage:
Sodium sulfite 30-50%, Alpha-Methyl anthraquinone 5-10%, lipase 5-15%, hemicellulase 1-10%, lignin degradation enzyme 1-10%, DTPA10-20%, neopelex 20-40%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106093302A CN102174755B (en) | 2010-12-28 | 2010-12-28 | Boiling assistant for preparing high polymerised pulp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106093302A CN102174755B (en) | 2010-12-28 | 2010-12-28 | Boiling assistant for preparing high polymerised pulp |
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| CN102174755A CN102174755A (en) | 2011-09-07 |
| CN102174755B true CN102174755B (en) | 2012-11-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107044062B (en) * | 2017-04-24 | 2019-03-22 | 保定钞票纸业有限公司 | A kind of the dry raw material preparation system and technique of slurrying cotton fiber |
| CN106988136B (en) * | 2017-04-24 | 2019-03-22 | 保定钞票纸业有限公司 | One kind is dry to cut cotton fiber biological enzyme pulping process |
| CN110512452B (en) * | 2019-08-22 | 2021-09-21 | 华南理工大学 | High-polymerization-degree wood pulp and preparation method thereof |
| CN111893787B (en) * | 2020-07-13 | 2022-12-09 | 山东银鹰股份有限公司 | Production process of cotton pulp for plastic-grade cellulose diacetate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142255A (en) * | 1994-12-16 | 1997-02-05 | 里格诺金姆有限公司 | Multicomponent system for modifying decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| CN1616758A (en) * | 2003-11-13 | 2005-05-18 | 中国印钞造币总公司 | Process for biologically pulping |
| CN101130886A (en) * | 2006-08-26 | 2008-02-27 | 山东海龙股份有限公司 | High polymerization degree cotton pulp and method for making the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08218290A (en) * | 1995-02-09 | 1996-08-27 | Mitsubishi Paper Mills Ltd | Production of non-chlorine-bleaching pulp |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142255A (en) * | 1994-12-16 | 1997-02-05 | 里格诺金姆有限公司 | Multicomponent system for modifying decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system |
| CN1616758A (en) * | 2003-11-13 | 2005-05-18 | 中国印钞造币总公司 | Process for biologically pulping |
| CN101130886A (en) * | 2006-08-26 | 2008-02-27 | 山东海龙股份有限公司 | High polymerization degree cotton pulp and method for making the same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平8-218290A 1996.08.27 |
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