CN104109978A - Method for preparing cotton linter dissolving pulp - Google Patents
Method for preparing cotton linter dissolving pulp Download PDFInfo
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- CN104109978A CN104109978A CN201410284978.5A CN201410284978A CN104109978A CN 104109978 A CN104109978 A CN 104109978A CN 201410284978 A CN201410284978 A CN 201410284978A CN 104109978 A CN104109978 A CN 104109978A
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Abstract
The invention relates to a method for producing dissolving pulp, and especially relates to a cleaning production method for preparing a qualified dissolving pulp by using a cotton linter. The method is characterized in that cotton linter raw material after material preparation is subjected to urea pretreatment, then a boiling bottom liquid and hydrogen peroxide under certain pressure and temperature for steaming and bleaching, and then qualified dissolving pulp is finally obtained through the acid treatment. Compared with traditional high temperature, high pressure, forced steaming, heavy bleaching technology, technology flow is shortened, production energy consumption is reduced, product yield is increased, production cost is reduced, waste water pollution load during the production process is less, the waste water has the characteristics of nontoxicity and innocuousness, and can be directly used for crops irrigation or organic fertilizer production after simple being processed.
Description
Technical field
The present invention relates to pulping technique field, be specifically related to a kind of method of preparing cotton linter dissolving pulp.
Background technology
Cotton linter claims again cotton linters, after being the effect by cotton gin, at the short and intensive fiber of a part for cottonseed surface attachment and fine hair.China abounds with cotton, and cotton linter resource is very abundant, and the cottonseed of cotton ginning is all shelled after suede, and the short flannel quantity obtaining is approximately equivalent to 15% of gined cotton total output, is a fibre resources can not be ignored.With regard to its chemical composition, the content of cellulose of cotton linter is up to 90%(mass fraction, lower same), contain in addition the materials such as a small amount of pectin (approximately 1%), wax (approximately 2%), lignin (2% ~ 3%), ash content (approximately 1%), wherein under most of conditions of cooking relaxing, just can remove, but owing to having sneaked into cotton seed hull, boll hull (its main component is lignin) in cotton linter in ginning process, thereby cause pulp-making of cotton linter difficulty to increase.
Cotton linter is prepared dissolving pulp, is mainly lignin, wax and a hemicellulose of removing wherein, and is accompanied by the process that the gossypin degree of polymerization reduces.Traditional pulp-making of cotton linter method is the technique that first boiling after bleaching " is heavily steamed and gently floated ", boiling is carried out conventionally in rotary spherical digester, by high temperature, high pressure, high alkaline boiling, dissolved lignin, hemicellulose, reduce the cellulosic degree of polymerization, and remove the impurity such as boll hull, cotton seed hull.Traditional preparation flow is as follows:
(1) get the raw materials ready: cotton linter-opener-dry slag disposal device-blower fan-cyclone separator;
(2) slurrying: pressafiner-rotary spherical digester-spraying pot-HC Cleaner-jordan refiner-vaccum pulp absorbing unit-intermediate pool-desander-wash engine-reserve pit-blender-static mixer-chlorination tower-wash engine-double roller mixer-alkalization tower-double roller mixer-bleaching tower-wash engine-dechlorinator;
(3) post processing: wash engine-reserve pit-reserve pit-gravity disc thickener-pulp machine.
THE TECHNICS IN PULPMAKING OF COTTON LINTER adopts the method to produce dissolving pulp, exists following problem: 1) cooking liquor and cotton linter mix, permeate inhomogeneous, cooking effect is poor.2) in order to reduce the degree of polymerization and to improve reactivity worth, fiber primary cell wall is fully destroyed, adopting process condition is fiercer, and basic hydrolysis and peeling reaction are strong, cause cotton linter consumption higher, and yield is lower.3) in waste liquid, be dissolved with the organic matters such as lignin, hemicellulose, wax, its COD higher (30000-40000mg/l), liquid waste processing difficulty, cost is higher.4) adopt chlorine or chloride bleaching, in waste water, contain chlorine, increased the difficulty of liquid waste processing.5) complex manufacturing, equipment is more, and production cost drops into larger.
In order to reduce pollution, alkali-hydrogen peroxide process starts to be applied.Document (Tang Jifu, Li Fengzhu. pulp-making of cotton linter new technology [J]. paper and papermaking 2005 (1): 42-43), describe this method in detail.It is bleaching agent that this method replaces the chlorine such as chlorine, chlorine dioxide with hydrogen peroxide, can reduce the pollutant in waste liquid, and become pulp yield and whiteness higher.Can only bleached fiber top layer but this method also exists hydrogen peroxide, be difficult for infiltration, can not effectively remove grease and wax, the easy decomposition of hydrogen peroxide, steam the problems such as effect haves much room for improvement of floating.
Summary of the invention
The problem existing for prior art, the present invention proposes a kind of preparation method little, that waste liquid is easy to be recycled, product yield is high, the cotton linter dissolving pulp effective, production cost is low is floated in steaming that pollutes.
For achieving the above object, the present invention adopts following technical scheme: taking the cotton linter after getting the raw materials ready as raw material, successively add urea and enzyme to process it, then joined in the pressure vessel that fills liquid at the bottom of boiling, and add hydrogen peroxide to steam to float, finally gained slurry is carried out to acid treatment, then after post-processing step, obtain qualified dissolving pulp.
Its concrete steps are:
1) to liquor ratio, (weight ratio of over dry cotton linter and liquid, fluid density is pressed 1g/cm in urea preliminary treatment
3) add urea in the system of get the raw materials ready cotton linter and water of 1:7 ~ 15, under 90 DEG C ~ 170 DEG C conditions, 30 ~ 180 min are processed in prehydrolysis;
2) enzyme processing regulates above-mentioned system pH to 7 ~ 8 with sulfuric acid, in system, add enzyme, described enzyme is for being feruloyl esterase or cellulase or lipase, the amount that adds enzyme is 20 ~ 200U/g oven dry stock, under 40 DEG C ~ 80 DEG C conditions, process 2 ~ 48h, then discharge treatment fluid, obtain slurry I, its moisture is at 70wt% ~ 80wt%;
3) steam to float to process to steaming and float and in container, add successively liquid at the bottom of slurry I and boiling, its mass ratio is 1:0.4 ~ 0.6, be warming up to 85 DEG C ~ 100 DEG C, add 27.5wt% hydrogen peroxide, the mass percent of the relative over dry cotton linter of its addition is 5% ~ 20%, and add water regulation system liquor ratio, make its liquor ratio in the scope of 1:8 ~ 9, continue to be warming up to 120 DEG C ~ 170 DEG C, steam to float and process 1 ~ 3h, pressure release, whole process is carried out under stirring condition;
4) acid treatment is, under the condition of 50 DEG C ~ 90 DEG C, to add acid in temperature, and regulation system pH to 3 ~ 5, process 0.5 ~ 3h.
Get the raw materials ready as step is prior art, object is many foreign material such as sand and dust in cotton linter, boll hull, cottonseed of removing as far as possible.After getting the raw materials ready, be first to add urea to carry out prehydrolysis in the cotton linter system of getting the raw materials ready.The basic character of urea plays infiltration and the profit effect of rising, and can remove the wax fat on cotton linter surface; Select the reason of urea to be also, on the one hand, urea action temperature and, little to the cutting action of fiber, reduced the loss of cotton linter raw material, be conducive to improve yield; On the other hand, urea is as a kind of conventional fertilizer, and the waste liquid that contains urea does not only form pollution to environment, produces waste liquid and can also use by as fertilizer sources after treatment.Cotton linter can increased fiber after Urea treatment and the contact area of enzyme and other chemical reagent, improve accessibility, thereby fast reaction speed reduces the consumption of enzyme below.The mass percent of the relative over dry cotton linter of optimum amount of urea is 6% ~ 12%, at 90 ~ 170 DEG C, and preliminary treatment 30 ~ 180 min.
In system, add enzyme again.Enzyme is processed and is not only polluted little but also have a very strong selective and specific aim, the present invention relates to three kinds of enzymes that slurrying field is common: the ester bond in feruloyl esterase energy Polysaccharides ferulic acid ester, forulic acid is dissociated out, it can cut off crosslinked between polysaccharide-polysaccharide in cell membrane, polysaccharide-lignin, is conducive to the release of cellulosic degraded and lignin in cell wall substance; Lipase and cellulase can cut staple element glycosidic bond, effectively reduce the cellulosic degree of polymerization.For an adapt circumstance is provided to enzyme, with sulfuric acid regulation system pH to 7 ~ 8, control temperature between 40 ~ 80 DEG C, then select 1 ~ 3 kind in these three kinds of enzymes, the amount ranges of enzyme is 20 ~ 200U/g oven dry stock, falls the poly-2 ~ 48h of processing.Fall after poly-processing by enzyme, can greatly reduce the degree of polymerization of cotton linter, ensured the effect that next step steaming is floated.After enzyme is processed, discharge treatment fluid, make slurry moisture 70% ~ 80%.
Float and in container, add successively liquid at the bottom of slurry I and boiling to steaming, its mass ratio is 1:0.4 ~ 0.6.At the bottom of boiling, the component of liquid is: cellulose bleeding agent: 0.5% ~ 1%, potassium hydroxide 10% ~ 25%, surfactant 0.1% ~ 1%, magnesium sulfate 0.2% ~ 0.5%, EDTA 0.5% ~ 3%, described surfactant is the built agent of neopelex, polyethylene glycol.
At the bottom of boiling described in the present invention, in the component of liquid, cellulose bleeding agent can make other chemical reagent contact with cotton linter fiber better, improves its functioning efficiency.Potassium hydroxide replaces traditional NaOH, contains potassium ion like this in waste liquid, is conducive to the application of waste liquid as fertilizer sources.The effect of surfactant mainly contains and accelerates boiling infiltration, improves bleaching effect etc.Adding and the effect of EDTA chelating heavy metal of magnesium sulfate, reduce the decomposition that adds hydrogen peroxide after hydrogen peroxide, thereby improved hydrogen peroxide bleaching effect.
By the heating of above-mentioned mixed system, when temperature rises to 85 DEG C ~ 100 DEG C, add hydrogen peroxide, hydrogen peroxide add the most of organic matter in can oxidation Decomposition waste liquid, strengthening cooking effect, increases pulp brightness.Find in practice to add hydrogen peroxide can obtain optimum efficiency at this temperature, because can make like this it discharge fast hydroxyl radical free radical, reduce decomposition.The mass percent of the relative over dry cotton linter of addition is 5% ~ 20%, and adds in right amount water regulator solution ratio, makes it in the scope of 1:8 ~ 9, ensures that it can normally stir, and has best steaming to float effect.Continue to be warming up to 120 DEG C ~ 170 DEG C, steam to float and process 1 ~ 3h, pressure release discharge, whole process is carried out under stirring condition.
Finally, add acid to process, object is to improve the whiteness of pulp, reduce ash content, improve the reactivity worth of pulp, finally make pulp reach the QUALITY STANDARD (FZ/T 51001-2009) of short rayon fiber Wesy Cotton Pulp Grade A, add any in hydrochloric acid, sulfuric acid, acetic acid, regulation system pH to 3 ~ 5, process 0.5 ~ 3h.
Use technique of the present invention to prepare dissolving pulp, product yield and whiteness all increase than traditional handicraft.The waste liquid producing can discharge after simple slagging-off, sedimentation, tune pH, can also be used for field irrigation and organic fertilizer, and in waste liquid, COD is from be reduced to≤14000mg/L of the 40000mg/L of prior art.
Beneficial effect of the present invention is: shortened the technological process of traditional alkali lye boiling, reduced energy consumption, product yield and quality are all significantly improved, and production cost is significantly reduced.In addition, the pollutant load of producing in waste liquid reduces, and waste liquid can be used for field irrigation or make organic fertilizer through simple process.
Detailed description of the invention
Embodiment 1
In embodiment, cotton linter used is the three class one-level suedes of having bought on market.
Idiographic flow is as follows:
Get the raw materials ready: cotton linter-opener-dry slag disposal device-blower fan-cyclone separator;
Slurrying: processing-acid treatment is floated in the processing-steaming of urea preliminary treatment-enzyme;
Post processing: slagging-off-wash engine-reserve pit-reserve pit-gravity disc thickener-pulp machine.
Getting the raw materials ready in embodiment is traditional handicraft with last handling process, no longer repeats to introduce in following examples.
Pulping process is as follows:
The first step: urea preliminary treatment
In stainless steel stirred tank vessel, add 1Kg(oven-dry weight) the cotton linter of getting the raw materials ready, regulator solution be 1:7 than (ratio of over dry solid and total liquid, lower with), adds urea 80g, is warming up to 90 DEG C, is incubated 180min;
Second step: enzyme processing
Use 9 molL
-1sulfuric acid solution, adjust system pH to 7, temperature is reduced to 40 DEG C, adding feruloyl esterase and cellulase mass ratio is 1:1, consumption is 200U/g oven dry stock, 48h is processed in insulation, then discharges treatment fluid, makes slurry moisture at 70wt%;
The 3rd step: steam and float processing
Steaming is floated to process in the stainless steel pressure reactor with stirring and is carried out, and reactor has chuck can pass into Steam Heating outward.1:0.4 is to adding liquid at the bottom of preliminary treatment slurry and boiling in reactor, then at the logical steam of interlayer, while making slurry be warming up to 85 DEG C in mass ratio, add hydrogen peroxide 50g, add 50 DEG C of warm water, regulator solution ratio is to then closed reactor of 1:8, continue heating, make temperature rise to 120 DEG C, insulation 3h blowing;
It is fiber pervasion agent, potassium hydroxide, surfactant that liquid at the bottom of the boiling relating in processing procedure is floated in steaming, the mixed liquor of magnesium sulfate, EDTA, and consumption is as follows: bleeding agent: 5g, potassium hydroxide 100g, surfactant 1g, magnesium sulfate 2g, EDTA 5g;
Whole steaming is floated in process one and is headed straight for stirring, speed of agitator 200r/min;
The 4th step: acid treatment
In feed liquid, add sulfuric acid, adjust pH to 3, be incubated 3h at 50 DEG C;
After acid treatment, carry out post processing, be prior art and repeat no more.
The final cotton linter dissolving pulp obtaining, yield can reach 86.5%, and product quality has been carried out detecting (product quality data see attached list one), all reaches short rayon fiber Wesy Cotton Pulp Grade A QUALITY STANDARD (FZ/T 51001-2009).Yield and Related product mass parameter are all measured according to national standard.
Embodiment 2
In embodiment, cotton linter used is the three class suede one-level suedes of having bought on market.
Cotton linter used is through getting the raw materials ready.
Pulping process is as follows:
The first step: urea preliminary treatment
In stainless steel stirred tank vessel, add 1Kg(oven-dry weight) the cotton linter of getting the raw materials ready, regulator solution, than for 1:10, adds urea 150g, is warming up to 170 DEG C, insulation 180min;
Second step: enzyme processing
Use 9 molL
-1sulfuric acid solution, adjust system pH to 8, temperature is reduced to 80 DEG C, adds feruloyl esterase, consumption is 100U/g oven dry stock, 48h is processed in insulation, then discharges treatment fluid, makes slurry moisture at 75wt%;
The 3rd step: steam and float processing
Steaming is floated to process in the stainless steel pressure reactor with stirring and is carried out, and reactor has chuck can pass into Steam Heating outward.1:0.5 is to adding after processing liquid at the bottom of feed liquid and boiling in reactor, then at the logical steam of interlayer, while making slurry be warming up to 85 DEG C in mass ratio, add hydrogen peroxide 20%, add 100 DEG C of hot water, regulator solution ratio is to then closed reactor of 1:10, continue heating, make temperature rise to 120 DEG C, insulation 3h blowing;
It is bleeding agent, potassium hydroxide, surfactant that liquid at the bottom of the boiling relating in processing procedure is floated in steaming, the mixed liquor of magnesium sulfate, EDTA, and addition is as follows: bleeding agent: 10g, potassium hydroxide 250g, surfactant 10g, magnesium sulfate 5g, EDTA 30g;
Whole steaming is floated in process one and is headed straight for stirring, speed of agitator 200r/min;
The 4th step: acid treatment
Acid used is hydrochloric acid, and acid-treated temperature is 95 DEG C, adjusts pH to 5, and the acid treatment time is 0.5h.
After acid treatment, carry out post processing, be prior art and repeat no more.
The final cotton linter dissolving pulp obtaining, yield can reach 85.1%, and product quality has been carried out detecting (product quality data see attached list one), all reaches short rayon fiber Wesy Cotton Pulp Grade A QUALITY STANDARD (FZ/T 51001-2009).Yield and Related product mass parameter are all measured according to national standard.
Embodiment 3
In embodiment, cotton linter used is the three class suede one-levels of having bought on market.
Cotton linter used is through getting the raw materials ready.
Pulping process is as follows:
The first step: urea preliminary treatment
In stainless steel stirred tank vessel, add 1Kg(oven-dry weight) the cotton linter of getting the raw materials ready, regulator solution, than 1:15, adds urea 100g, is warming up to 130 DEG C, insulation 120min;
Second step: enzyme processing
Use 9 molL
-1sulfuric acid solution, adjust system pH to 7.5, temperature is reduced to 60 DEG C, adding feruloyl esterase, cellulase, lipase mass ratio is 1:1:1, consumption is 20U/g oven dry stock, 12h is processed in insulation, then discharges treatment fluid, makes slurry moisture 70% ~ 80%.PH value is to regulate with running water and potassium hydroxide solution;
The 3rd step: steam and float processing
Steaming is floated to process in the stainless steel pressure reactor with stirring and is carried out, and reactor has chuck can pass into Steam Heating outward.1:0.6 is to adding after processing liquid at the bottom of feed liquid and boiling in reactor, then at the logical steam of interlayer, while making slurry be warming up to 95 DEG C in mass ratio, add hydrogen peroxide 150g, add 80 DEG C of warm water, regulator solution ratio is to then closed reactor of 1:9, continue heating, make temperature rise to 150 DEG C, insulation 2h blowing;
It is bleeding agent, potassium hydroxide, surfactant that liquid at the bottom of the boiling relating in processing procedure is floated in steaming, the mixed liquor of magnesium sulfate, EDTA, and addition is as follows: bleeding agent: 8g, potassium hydroxide 200g, surfactant 5g, magnesium sulfate 3g, EDTA 20g;
Whole steaming is floated in process one and is headed straight for stirring, speed of agitator 200r/min;
The 4th step: acid treatment
Acid used is acetic acid, and acid-treated temperature is 70 DEG C, pH to 4, and the acid treatment time is 2.5h;
After acid treatment, carry out post processing, be prior art and repeat no more.
The final cotton linter dissolving pulp obtaining, yield can reach 86.9%, and product quality has been carried out detecting (product quality data see attached list one), all reaches short rayon fiber Wesy Cotton Pulp Grade A QUALITY STANDARD (FZ/T 51001-2009).Yield and Related product mass parameter are all measured according to national standard.
Embodiment 4
In embodiment, cotton linter used is the three class suede one-levels of having bought on market.
Cotton linter used is through getting the raw materials ready.
Pulping process is as follows:
The first step: urea preliminary treatment
In stainless steel stirred tank vessel, add 1Kg(oven-dry weight) the cotton linter of getting the raw materials ready, regulator solution, than 1:10, adds urea 120g, is warming up to 140 DEG C, insulation 120min;
Second step: enzyme processing
Use 9 molL
-1sulfuric acid solution, adjust system pH to 7.5, temperature is reduced to 60 DEG C, adding cellulase, lipase mass ratio is 1:1, consumption is 150U/g oven dry stock, 12h is processed in insulation, then discharges treatment fluid, makes slurry moisture 70% ~ 80%;
The 3rd step: steam and float processing
Steaming is floated to process in the stainless steel pressure reactor with stirring and is carried out, and reactor has chuck can pass into Steam Heating outward.1:0.5 is to adding after processing liquid at the bottom of feed liquid and boiling in reactor, then at the logical steam of interlayer, while making slurry be warming up to 100 DEG C in mass ratio, add hydrogen peroxide 150g, add 80 DEG C of warm water, regulator solution ratio is to then closed reactor of 1:9, continue heating, make temperature rise to 150 DEG C, insulation 2h blowing;
It is bleeding agent, potassium hydroxide, surfactant that liquid at the bottom of the boiling relating in processing procedure is floated in steaming, the mixed liquor of magnesium sulfate, EDTA, and addition is as follows: bleeding agent: 8g, potassium hydroxide 200g, surfactant 5g, magnesium sulfate 3g, EDTA 20g;
Whole steaming is floated in process one and is headed straight for stirring, speed of agitator 200r/min;
The 4th step: acid treatment
Acid used is acetic acid, and acid-treated temperature is 70 DEG C, pH to 4, and the acid treatment time is 2.5h.
After acid treatment, carry out post processing, be prior art and repeat no more.
The final cotton linter dissolving pulp obtaining, yield can reach 85.9%, and product quality has been carried out detecting (product quality data see attached list one), all reaches short rayon fiber Wesy Cotton Pulp Grade A QUALITY STANDARD (FZ/T 51001-2009).Yield and Related product mass parameter are all measured according to national standard.
The product index of subordinate list one embodiment
Subordinate list two short rayon fiber Wesy Cotton Pulp Grade A QUALITY STANDARD (FZ/T 51001-2009)
Claims (6)
1. prepare the method for cotton linter dissolving pulp for one kind, it is characterized in that: taking the cotton linter after getting the raw materials ready as raw material, successively add urea and enzyme to process it, then joined in the pressure vessel that fills liquid at the bottom of boiling, add hydrogen peroxide to steam and float processing, finally gained slurry is carried out to acid treatment, then after post-processing step, obtain qualified dissolving pulp.
2. a kind of method of preparing cotton linter dissolving pulp according to claim 1, is characterized in that: its concrete steps are:
1) urea preliminary treatment adds urea in the mixed system of get the raw materials ready cotton linter and the water of liquor ratio 1:7 ~ 15, and under 90 DEG C ~ 170 DEG C conditions, 30 ~ 180 min are processed in prehydrolysis;
2) enzyme processing regulates above-mentioned system pH to 7 ~ 8 with sulfuric acid, in system, add enzyme, described enzyme is for being feruloyl esterase or cellulase or lipase, the amount that adds enzyme is 20 ~ 200U/g oven dry stock, under 40 DEG C ~ 80 DEG C conditions, process 2 ~ 48h, then discharge treatment fluid, obtain slurry I, its moisture is at 70wt% ~ 80wt%;
3) steam to float to process to steaming and float and in container, add successively liquid at the bottom of slurry I and boiling, its mass ratio is 1:0.4 ~ 0.6, be warming up to 85 DEG C ~ 100 DEG C, add 27.5wt% hydrogen peroxide, the mass percent of the relative over dry cotton linter of its addition is 5% ~ 20%, and add water regulation system liquor ratio, make its liquor ratio in the scope of 1:8 ~ 9, continue to be warming up to 120 DEG C ~ 170 DEG C, steam to float and process 1 ~ 3h, pressure release, whole process is carried out under stirring condition;
4) acid treatment is, under the condition of 50 DEG C ~ 90 DEG C, to add acid in temperature, and regulation system pH to 3 ~ 5, process 0.5 ~ 3h, and reaction completes, and enters post-processing step.
3. a kind of method of preparing cotton linter dissolving pulp according to claim 2, is characterized in that: in step 1), adding the mass percent of the relative over dry cotton linter of amount of urea is 8% ~ 15%.
4. a kind of method of preparing cotton linter dissolving pulp according to claim 2, is characterized in that: in step 3), at the bottom of boiling, the component of liquid comprises cellulose bleeding agent, potassium hydroxide, surfactant magnesium sulfate, EDTA; The mass percent of the relative over dry cotton linter of its addition is as follows: cellulose bleeding agent 0.5% ~ 1%, potassium hydroxide 10% ~ 25%, surfactant 0.1% ~ 1%, magnesium sulfate 0.2% ~ 0.5%, EDTA 0.5% ~ 3%.
5. a kind of method of preparing cotton linter dissolving pulp according to claim 2, is characterized in that: the acid adding in step 4) is any one in hydrochloric acid, acetic acid, sulfuric acid.
6. a kind of method of preparing cotton linter dissolving pulp according to claim 2, is characterized in that: described surfactant is the built agent of neopelex, poly-diethanol, and its compound proportion is 1:1 ~ 10.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256629A (en) * | 2015-09-17 | 2016-01-20 | 河北吉藁化纤有限责任公司 | Preparation method for pulp |
| CN105484084A (en) * | 2015-11-24 | 2016-04-13 | 黄河三角洲京博化工研究院有限公司 | Method for preparing dissolving pulp by using cotton linters |
| CN106988136A (en) * | 2017-04-24 | 2017-07-28 | 保定钞票纸业有限公司 | One kind is dry to cut cotton fiber biology enzyme pulping process |
| CN108914660A (en) * | 2018-07-03 | 2018-11-30 | 保定钞票纸业有限公司 | A kind of bank-note paper cuts cotton fiber pulp and its production technology with dry |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154870A (en) * | 2010-12-28 | 2011-08-17 | 宜宾长毅浆粕有限责任公司 | Method for preparing high-polymer pulp |
| CN103061181A (en) * | 2012-12-31 | 2013-04-24 | 黄河三角洲京博化工研究院有限公司 | Complex enzyme preparation and technique for preparing dissolving pulp by using same |
-
2014
- 2014-06-24 CN CN201410284978.5A patent/CN104109978B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154870A (en) * | 2010-12-28 | 2011-08-17 | 宜宾长毅浆粕有限责任公司 | Method for preparing high-polymer pulp |
| CN103061181A (en) * | 2012-12-31 | 2013-04-24 | 黄河三角洲京博化工研究院有限公司 | Complex enzyme preparation and technique for preparing dissolving pulp by using same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256629A (en) * | 2015-09-17 | 2016-01-20 | 河北吉藁化纤有限责任公司 | Preparation method for pulp |
| CN105256629B (en) * | 2015-09-17 | 2017-10-17 | 河北吉藁化纤有限责任公司 | A kind of method for preparing pulp |
| CN105484084A (en) * | 2015-11-24 | 2016-04-13 | 黄河三角洲京博化工研究院有限公司 | Method for preparing dissolving pulp by using cotton linters |
| CN106988136A (en) * | 2017-04-24 | 2017-07-28 | 保定钞票纸业有限公司 | One kind is dry to cut cotton fiber biology enzyme pulping process |
| 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 |
| CN108914660A (en) * | 2018-07-03 | 2018-11-30 | 保定钞票纸业有限公司 | A kind of bank-note paper cuts cotton fiber pulp and its production technology with dry |
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| CN104109978B (en) | 2016-06-22 |
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