CN101372762B - Boiling composite additive for preparing cotton linter dissolving pulp and use thereof - Google Patents
Boiling composite additive for preparing cotton linter dissolving pulp and use thereof Download PDFInfo
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- CN101372762B CN101372762B CN2008100463366A CN200810046336A CN101372762B CN 101372762 B CN101372762 B CN 101372762B CN 2008100463366 A CN2008100463366 A CN 2008100463366A CN 200810046336 A CN200810046336 A CN 200810046336A CN 101372762 B CN101372762 B CN 101372762B
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- cotton linter
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Abstract
The invention belongs to the manufacture field of chemical fibre pulp-dreg in the textile industry, in particular relates to a compound steaming addition agent used for preparing cotton linter pulp-dreg as well as the applications of the addition agent for preparing the cotton linter pulp-dreg. The components of the addition agent comprise sodium peroxocarbonate, sodium polysulfide, bitter salt, sodium hydrosulfite and an anion surface activator; the weight percentages thereof are as follows: 20 to 30 percent of sodium peroxocarbonate, 20 to 30 percent of sodium polysulfide, 10 to 15 percent of bitter salt, 25 to 35 percent of sodium hydrosulfite as well as 5 to 10 percent of anion surface activator. The anion surface activator is 12 ammonium alkylbenzene sulfonate or 12 sodium alkylbenzene sulfonate. The applications of the compound steaming addition agent for preparing the cotton linter pulp-dreg include the three steps of preparing the liquid of the compound addition agent, preparing the mixed liquid of alkaline liquid and the liquid of the compound addition agent and feeding. The invention can effectively achieve the goals of reducing the cost, improving the quality, saving the resources, reducing the discharge of contaminations and improving the benefits.
Description
Technical field
The purified pulp that the invention belongs in the textile industry is made field, definite a kind of boiling composite additive that is used to prepare cotton linter dissolving pulp of saying so, and the application of this auxiliary agent in the preparation of cotton linter dissolving pulp.This auxiliary agent comprises models such as MA-1 type, CY-1 type, CY-2 type.
Background technology
Cotton linter is a textile industry raw material commonly used, at first velveteen is made pulp, makes viscose glue then, on spinning machine viscose glue is spun into tow at last.Wherein the preparation technology of pulp has adopted following steps mostly: get the raw materials ready, boiling, wash material, making beating, removal of impurities, chlorination, bleaching, acid treatment, removal of impurities washing, manufacture paper with pulp.Traditional cotton short flannel boiling production technology adopts simple soda cooking, mixing, permeating of cooking liquor and velveteen is inhomogeneous, and in order to reduce the degree of polymerization and to improve reactivity worth, the fiber primary cell wall is carried out fully broken ring, the adopting process condition is fierce, basic hydrolysis and peeling reaction are strong, cause cotton linter consume higher, yield is lower, alkali charge is higher, cooking reaction is inhomogeneous, COD and colourity are higher in, the black liquor big to the damage of alpha cellulose, these are the difficult problems that perplex the cotton linter dissolving pulp development and application for a long time.
Summary of the invention
That the cotton linter that the present invention is intended to exist at above-mentioned prior art consumes is higher, yield is lower, alkali charge is higher, cooking reaction is inhomogeneous, in, the black liquor big to the damage of alpha cellulose COD and colourity than problems such as height, a kind of boiling composite additive that is used to prepare cotton linter dissolving pulp is provided, and the method for concrete application in digesting technoloy.The present invention can effectively reach the purpose that reduces cost, improves the quality, economizes on resources, reduces pollutant emission, increases the benefit.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of boiling composite additive that is used to prepare cotton linter dissolving pulp is characterized in that: contain sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2S
x, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4And anion surfactant, its percentage by weight is respectively: sodium carbonate peroxide 20-30%, sodium polysulfide 20-30%, magnesium sulfate 10-15%, dithionous acid sodium 25-35%, anion surfactant 5-10%.
Described anion surfactant is 12 alkyl benzene sulphonate ammoniums or 12 sodium alkyl benzene sulfonates.
Preferably, by weight percentage, the sodium carbonate peroxide consumption is that the consumption of 25-30%, sodium polysulfide is that the consumption of 20-25%, magnesium sulfate is that 12-14%, dithionous acid sodium consumption are that the consumption of 30-32%, 12 alkyl benzene sulphonate ammoniums is 6.5-8%.
The application of described boiling composite additive in the cotton linter dissolving pulp boiling: specifically comprise the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 10-50kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 200-600g/l, obtain the sig water of 30-80g/l after the dilution, sig water is warming up to 〉=75 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 140-180 ℃, obtaining viscosity is the boiling half stuff of 10-80mpa.s.
Temperature retention time is 60-180min in described C, the step.
Auxiliary agent of the present invention is a kind of based on inorganic and organic digesting assistant, the complex of composite a certain amount of anion surfactant, and its Main Ingredients and Appearance is by inorganic digesting assistant sodium carbonate peroxide (2Na
2CO
33H
2O
2), sodium polysulfide (Na
2Sx), magnesium sulfate (MgSO
4), dithionous acid sodium (Na
2S
2O
4) and organic digesting assistant 12 alkyl benzene sulphonate ammoniums or 12 sodium alkyl benzene sulfonates.This auxiliary agent can promote that cellulosic profit rises, improve the infiltration of alkali lye rapidly to fine Vienna element, primary wall accelerates the failure, make the rapid strippings of non-fiber impurity such as lignin, pectin, wax, improve cooking reaction speed, the reducibility radical oxidation of this carbohydrate of cotton linter can be become the fructose terminal groups simultaneously, suppress peeling reaction, minimizing improves yield to cellulosic degraded.
1, the mechanism of sodium polysulfide effect
Sodium polysulfide can improve yield and product first fibre in the caustic soda boiling.Thereby its key reaction mechanism is can form alkali stable metasaccharinic acid terminal groups at the terminal aldehyde radical of cellulose to stop cellulosic peeling reaction, makes the fine raising of yield and first; Its reaction equation is as follows:
R fibre-CHO+S
2 2-+ 3OH----R-COO-+2S
2-+ 2H
2O
2, the magnesium sulfate mechanism of action
As everyone knows; in soda cooking liquid, contain the transition metal thing; as iron ion etc.; for preventing that it is to cellulosic degraded catalytic action; add an amount of magnesium sulfate; magnesium salts 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 alpha cellulose.
3, the mechanism of action of dithionous acid sodium
Dithionous acid sodium (Na
2S
2O
4) be a very strong reductant, it can make reducibility group such as carbonyl reduction is hydroxyl, thereby makes cellulose avoid peeling reaction and degrade:
The R fibre-+CHO+Na
2S
2O
4+ 1/2O
2+ 2H
2O---R fibre-CH
2OH+NaHSO
3+ NaHSO
4
We know that cotton linter contains lignin about 3%, Na
2S
2O
4Can also go back the carbonyl in the protolignin, the result reduces chromophoric group, the speed of also having promoted delignification simultaneously.
4, the mechanism of action of alkyl benzene sulphonate ammonium
12 alkyl benzene sulphonate ammoniums are a kind of anion surfactants, have functions such as infiltration, emulsification, dispersion, foaming, washing decontamination, can effectively improve fully contacting of each chemical agent of boiling and fiber, improve reaction uniformity.
Work to auxiliary agent in the preparation cotton linter dissolving pulp is illustrated in order to contrast test below:
A, test objective: in the preparation of cotton linter dissolving pulp, add auxiliary agent and the not contrast of adding assistant.
B, testing equipment: digester, jacket steam digester, rotary spherical digester, join alkali bucket, feeding system, beater.C, test situation
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 and improves approximately 1% than the semi-finished product first of adding assistant not is fine, and ash reduces by 0.43%, and irony reduces 7ppm, and the COD of black liquor, colourity reduce by 18.7%, 6.9% respectively; Finished product first fibre improves 0.5% after making used additives, whiteness improves 2%, and reactivity worth has improvement, and ash changes not obvious, and cotton linter consumption on average reduces by 4.1%, and alkali charge reduces by 2.2%, has very obvious effects after making used additives.
Practical application:
A, by contrast test, proved that composite assistant of the present invention improves the first fibre, reduces the suede consumption, reduces black liquor COD in preparation cotton linter dissolving pulp process, the effect of reduce colourity, reduce alkali charge, improving reactivity worth is obvious.Then begin in the workshop practice.
B, application conclusion
Unit product cotton linter consumption on average reduces about 0.037 ton of/ton pulp, and the reduction amplitude is 2.8%; The unit product quantity of alkali consumption reduces by 0.016 ton of/ton pulp, amounts to approximately and economizes on alkali number 2%; Black digestion liquid COD reduces by 20.7%, and colourity reduces by 8.07%; Pulp end product quality index is stable, conforms to quality requirements; After the stoste of Subscriber Unit, spinning process are used and are added with the cotton pulp dregs of rice of composite assistant, stable production process, the quality situation is stable, the lousiness rate, change a rate, do strong, driedly stretch, all no abnormal variation of whiteness.
Beneficial effect of the present invention shows:
The present invention has reduced the raw materials consumption resource, has reduced pollutant emission.Save resource effectively, protected environment.
| The present invention | Existing advanced technology | |
| The auxiliary agent Main Ingredients and Appearance | Sodium carbonate peroxide and dithionous acid sodium, sodium polysulfide, magnesium sulfate etc. | Disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate etc. |
| The application of auxiliary agent | In producing, use the cotton pulp dregs of rice | In producing, do not use the cotton pulp dregs of rice |
| The cotton linter consumption | The cotton linter consumption has reduced by 2.8%. | 1.3 tons/ton of cotton linter consumption average out to are more than the slurry |
| Pollutant | Black digestion liquid COD reduces by 20.7%, and colourity reduces by 8.07%. | Black digestion liquid COD, colourity are higher. |
| Alkali charge | 15% | More than 17% |
| Economic benefit | Reduce by 258 yuan of/ton slurries of unit product manufacturing cost | There is not this benefit |
| The market competitiveness | Has the low-cost competition advantage | There is not this advantage |
The present invention is owing to provide a kind of cotton linter boiling composite additive that is used for, changed the mode of production of traditional cotton short flannel boiling, create a kind of efficient, low consumption, the new technology of the production cotton pulp dregs of rice of environmental protection, broken the traditional handicraft of cotton linter boiling, and find out the production technology of using this composite assistant, realize reducing cotton linter consumption, alkali consumes, reduce black digestion liquid COD and colourity, the cotton pulp dregs of rice product of using boiling composite additive production provided by the invention is subjected to affirming of user, having opened up pulp production economizes on resources, reduce the innovative technology of pollutant emission, thereby reduce cost, environmental.
The application of the boiling composite additive that the present invention proposes, realize low cost, environmental protection production that the cotton pulp dregs of rice are produced, promote the cellulosic profit to rise when having set up the perfect adaptation cotton linter boiling of a cover, improve alkali lye rapidly to cellulosic infiltration, the brand-new production technology of primary wall accelerates the failure, realization makes the rapid stripping of non-cellulosic impurities such as lignin, pectin, wax, simultaneously the reducibility radical oxidation of this carbohydrate of cotton linter can be become the fructose terminal groups, suppress peeling reaction, minimizing improves yield to cellulosic degraded.
Use the present invention, saved production cost in process of production, significantly reduce the discharging of pollutant, promoted quality, increased benefit, protected environment.
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 also will improve source quality; the direct economy that the influence that protection brings to social environment exceeds its generation 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 kind of boiling composite additive that is used to prepare cotton linter dissolving pulp contains sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4With anion surfactant 12 alkyl benzene sulphonate ammoniums, its percentage by weight is: sodium carbonate peroxide 30%, sodium polysulfide 20%, magnesium sulfate 15%, dithionous acid sodium 25%, 12 alkyl benzene sulphonate ammoniums 10%.The application characteristic of present embodiment is: the sodium carbonate peroxide consumption is very high, can effectively improve pulping yield, and delignification speed is fast, and dosage of surfactant is big, and the cooking liquor infiltration is even, the boiling good uniformity.
Embodiment 2
A kind of boiling composite additive that is used to prepare cotton linter dissolving pulp contains sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4With anion surfactant 12 sodium alkyl benzene sulfonates, its percentage by weight is respectively: sodium carbonate peroxide 20%, sodium polysulfide 20%, magnesium sulfate 15%, dithionous acid sodium 35%, 12 sodium alkyl benzene sulfonates 10%.The application characteristic of present embodiment is: can effectively improve pulping yield, the cooking liquor osmotic evenness has certain improvement, and boiling half stuff first fibre is higher, and black digestion liquid COD and colourity are lower.
Embodiment 3
A kind of boiling composite additive that is used to prepare cotton linter dissolving pulp contains sodium carbonate peroxide 2Na in the component
2CO
33H
2O
230%, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4With anion surfactant 12 alkyl benzene sulphonate ammoniums, its percentage by weight is respectively: sodium carbonate peroxide 25%, sodium polysulfide 20%, magnesium sulfate 13%, dithionous acid sodium 34%, 12 alkyl benzene sulphonate ammoniums 8%.The application characteristic of embodiment is: can effectively improve pulping yield, delignification speed is very fast, and dosage of surfactant is moderate, and the cooking liquor infiltration is evenly better, and the cooking liquor infiltration is better even, and boiling half stuff first fibre is higher, and black digestion liquid COD and colourity are lower.
Embodiment 4
A kind of boiling composite additive that is used to prepare cotton linter dissolving pulp contains sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4With anion surfactant 12 alkyl benzene sulphonate ammoniums, its percentage by weight is respectively: sodium carbonate peroxide 24%, sodium polysulfide 22%, magnesium sulfate 15%, dithionous acid sodium 31%, 12 alkyl benzene sulphonate ammoniums 8%.The application characteristic of present embodiment is: can effectively improve pulping yield, delignification speed is very fast, and dosage of surfactant is moderate, and the cooking liquor infiltration is evenly better, and the cooking liquor infiltration is better even, and boiling half stuff first fibre is higher, and black digestion liquid COD and colourity are lower.
Embodiment 5
A kind of boiling composite additive that is used to prepare cotton linter dissolving pulp contains sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, dithionous acid receives Na
2S
2O
4And anion surfactant, its percentage by weight is respectively: sodium carbonate peroxide 25%, sodium polysulfide 23%, magnesium sulfate 14%, dithionous acid sodium 29%, 12 sodium alkyl benzene sulfonates 9%.The application characteristic of present embodiment is: can effectively improve pulping yield, delignification speed is very fast, and the cooking liquor infiltration is evenly better, and boiling half stuff first fibre is higher, and black digestion liquid COD is lower.
Embodiment 6
The application of boiling composite additive in the cotton linter dissolving pulp boiling specifically comprises the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 10kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 200g/l, obtain the sig water of 30g/l after the dilution, sig water is warming up to 75 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 140 ℃, obtaining viscosity is the boiling half stuff of 80mpa.s.Wherein, temperature retention time is 60 minutes.
Embodiment 7
The application of boiling composite additive in the cotton linter dissolving pulp boiling specifically comprises the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 50kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 600g/l, obtain the sig water of 80g/l after the dilution, sig water is warming up to 90 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 180 ℃, obtaining viscosity is the boiling half stuff of 10mpa.s.Wherein, temperature retention time is 180 minutes.
Embodiment 8
The application of boiling composite additive in the cotton linter dissolving pulp boiling specifically comprises the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 20kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 300g/l, obtain the sig water of 50g/l after the dilution, sig water is warming up to 80 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 160 ℃, obtaining viscosity is the boiling half stuff of 20mpa.s.Wherein, temperature retention time is 120 minutes.
Embodiment 9
The application of boiling composite additive in the cotton linter dissolving pulp boiling specifically comprises the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 40kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 500g/l, obtain the sig water of 45g/l after the dilution, sig water is warming up to 85 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 150 ℃, obtaining viscosity is the boiling half stuff of 30mpa.s.Wherein, temperature retention time is 90 minutes.
Embodiment 10
The application of boiling composite additive in the cotton linter dissolving pulp boiling specifically comprises the steps:
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 30kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 400g/l, obtain the sig water of 55g/l after the dilution, sig water is warming up to 88 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 145 ℃, obtaining viscosity is the boiling half stuff of 60mpa.s.Wherein, temperature retention time is 80 minutes.
The invention is not restricted to above-mentioned embodiment, described cotton linter boiling composite additive is applicable to that any use cotton linter carries out the production of boiling, comprises the production of products such as the long filament cotton pulp dregs of rice, short silk flosssilk wadding pulp.
Claims (5)
1. a boiling composite additive that is used to prepare cotton linter dissolving pulp is characterized in that: contain sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, sodium dithionite Na
2S
2O
4And anion surfactant, its percentage by weight is: sodium carbonate peroxide 20-30%, sodium polysulfide 20-30%, magnesium sulfate 10-15%, sodium dithionite 25-35%, anion surfactant 5-10%; Described anion surfactant is 12 alkyl benzene sulphonate ammoniums or 12 sodium alkyl benzene sulfonates.
2. the boiling composite additive that is used to prepare cotton linter dissolving pulp according to claim 1 is characterized in that: preferred, by weight percentage, sodium carbonate peroxide 25-30%, sodium polysulfide 20-25%; Magnesium sulfate 12-14%; Sodium dithionite 30-32%; 12 alkyl benzene sulphonate ammonium 6.5-8%.
3. the boiling composite additive that is used to prepare cotton linter dissolving pulp according to claim 1 is characterized in that: contain sodium carbonate peroxide 2Na in the component
2CO
33H
2O
2, sodium polysulfide Na
2Sx, magnesium sulfate MgSO
4, sodium dithionite Na
2S
2O
4And anion surfactant, its percentage by weight is: sodium carbonate peroxide 30%, sodium polysulfide 20%, magnesium sulfate 15%, sodium dithionite 25%, 12 alkyl benzene sulphonate ammoniums 10%.
4. according to claim 1ly be used for preparing the application process of the boiling composite additive of cotton linter dissolving pulp, it is characterized in that: specifically comprise the steps: in the cotton linter dissolving pulp boiling
The configuration of A, composite assistant liquid: according to 6t cotton linter meter, the 10-50kg composite assistant is joined in the auxiliary agent dissolving tank that suitable quantity of water is housed, stirring and dissolving is even, and it is stand-by to form composite assistant liquid;
B, produce the mixed liquor of alkali lye and composite assistant liquid: the composite assistant liquid that makes among the A is joined in the high alkali liquid that concentration is 200-600g/l, obtain the sig water of 30-80g/l after the dilution, sig water is warming up to 〉=75 ℃, place that to join the alkali bucket stand-by;
C, feed intake: place rotary spherical digester to carry out boiling the mixed liquor that obtains among 6t cotton linter and the B, insulation after boiling is warming up to 140-180 ℃, obtaining viscosity is the boiling half stuff of 10-80mpa.s.
5. the application process of boiling composite additive according to claim 4 in the cotton linter dissolving pulp boiling is characterized in that: temperature retention time is 60-180min in described C, the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100463366A CN101372762B (en) | 2008-10-21 | 2008-10-21 | Boiling composite additive for preparing cotton linter dissolving pulp and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100463366A CN101372762B (en) | 2008-10-21 | 2008-10-21 | Boiling composite additive for preparing cotton linter dissolving pulp and use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101372762A CN101372762A (en) | 2009-02-25 |
| CN101372762B true CN101372762B (en) | 2011-04-06 |
Family
ID=40447131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100463366A Expired - Fee Related CN101372762B (en) | 2008-10-21 | 2008-10-21 | Boiling composite additive for preparing cotton linter dissolving pulp and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101372762B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154869B (en) * | 2010-12-28 | 2013-04-10 | 宜宾长毅浆粕有限责任公司 | Cooking aid for preparing chemical fiber pulp |
| CN112900130B (en) * | 2021-02-02 | 2022-08-12 | 大连工业大学 | Method for reducing whiteness reduction of cooked plant fibers |
| CN113802403B (en) * | 2021-08-13 | 2022-07-26 | 湖北金汉江精制棉有限公司 | Production process of high-polymerization-degree refined cotton |
| CN113818270B (en) * | 2021-08-13 | 2022-11-04 | 湖北金汉江精制棉有限公司 | Production method for controlling depolymerization during cooking of refined cotton |
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| CN101372762A (en) | 2009-02-25 |
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