CN113882182A - Method for producing reed pulp for viscose fiber by using reed pulp board - Google Patents
Method for producing reed pulp for viscose fiber by using reed pulp board Download PDFInfo
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- CN113882182A CN113882182A CN202111227984.3A CN202111227984A CN113882182A CN 113882182 A CN113882182 A CN 113882182A CN 202111227984 A CN202111227984 A CN 202111227984A CN 113882182 A CN113882182 A CN 113882182A
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- Prior art keywords
- pulp
- reed
- reed pulp
- acid
- content
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 235000014676 Phragmites communis Nutrition 0.000 title claims abstract description 61
- 239000000835 fiber Substances 0.000 title claims abstract description 50
- 229920000297 Rayon Polymers 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003513 alkali Substances 0.000 claims abstract description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 19
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000010306 acid treatment Methods 0.000 claims abstract description 17
- 238000005470 impregnation Methods 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 14
- 239000008234 soft water Substances 0.000 claims abstract description 12
- 238000004061 bleaching Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000009898 sodium hypochlorite bleaching Methods 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims description 20
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 9
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 230000020477 pH reduction Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 13
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 11
- 238000007380 fibre production Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000875 Dissolving pulp Polymers 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
Abstract
The invention relates to the technical field of viscose fiber production, in particular to a method for producing reed pulp for viscose fiber by using a reed pulp board, which is carried out according to the following steps: sequentially and respectively carrying out alkali impregnation on reed pulp boards for papermaking by using liquid alkali, sequentially washing pulp with high-purity alpha fiber content by using soft water, carrying out pre-acid treatment by using hydrochloric acid, removing impurities by using a sand remover, separating, bleaching for 110-150 minutes by using a traditional sodium hypochlorite bleaching process, adding oxalic acid and sodium hexametaphosphate for acid treatment, removing impurities by using the sand remover for the second time, and washing by using the soft water for the second time to obtain the reed pulp for viscose fibers. The invention has simple process, low raw material cost and little pollution generated in production, the obtained reed pulp for viscose fiber has low ash content and iron content, and the pulp has high whiteness, meets the standard of the viscose fiber paper-modified wood pulp first-class products, and is more suitable for the market needs in the future.
Description
Technical Field
The invention relates to the technical field of viscose fiber production, in particular to a method for producing reed pulp for viscose fiber by using a reed pulp board.
Background
The Bos Teng lake reed is mostly used for producing paper making pulp, and no company uses pulp as raw material to produce reed pulp for viscose fiber in China yet. The reed pulp for viscose is produced by using a reed pulp board for papermaking produced by Taylon reed in pulp workshop of the Zhongtai textile group Kuerle fiber company as a raw material, and the comparison of various performance indexes of the reed pulp with the quality standard of the viscose paper-modified wood pulp is verified through tests to see whether the standard of the pulp for viscose can be met or not. As a raw material for producing viscose, the viscose fiber can widen the raw material supply chain, respond to market changes, reduce cost and improve efficiency and improve product competitiveness.
The main problems of the production at present are as follows:
1. due to the growth environment influence of reed paper pulp raw materials and the paper pulp process limitation, the indexes of ash content and iron content of the produced reed paper pulp are high, the indexes of ash content and iron content are high when the pulp is used as a raw material for modifying and producing reed paper pulp, and the index requirements of ash content and iron content of dissolving pulp or paper pulp can not be met;
2. the content of the alpha fiber of the reed pulp is lower, and is between 83.0 and 85.0 percent;
3. the whiteness is 73 to 76 percent after the acid treatment, hydrogen peroxide is firstly used for bleaching, and then sodium hypochlorite is used for bleaching, but the whiteness index can not reach the whiteness of the modified wood pulp;
4. in the stage of alkali impregnation, short fibers are dissolved in alkali liquor more, and the small fibers are lost more in the later stage, so that the yield is low.
Disclosure of Invention
The invention provides a method for producing reed pulp for viscose fiber by using reed pulp, which overcomes the defects of the prior art and can effectively solve the problems of high ash content and iron content and low alpha fiber content in reed pulp raw materials in the prior art for producing viscose fiber.
The technical scheme of the invention is realized by the following measures: a method for producing reed pulp for viscose fiber by using reed pulp board is carried out according to the following steps: first step, alkali impregnation: carrying out alkali impregnation on a reed pulp board for papermaking by using liquid alkali with the concentration of 80g/L to 100g/L to obtain pulp with high-purity alpha-cellulose content; step two, washing materials: sequentially washing the slurry with high-purity alpha fiber content by using soft water at the temperature of 58-60 ℃ for the first time to obtain washed slurry; step three, acid preparation: pre-acid treating the washed slurry with hydrochloric acid for 40-60 min to obtain pre-acid slurry; fourthly, pre-desanding: removing and separating impurities in the slurry subjected to the pre-acidification for the first time through a sand remover to obtain purified slurry; step five, bleaching with sodium hypochlorite: bleaching the purified pulp for 110 to 150 minutes by a traditional sodium hypochlorite bleaching process to obtain bleached pulp; sixthly, acid treatment: adding oxalic acid and sodium hexametaphosphate acid into the bleached pulp at the temperature of between 58 and 60 ℃ to perform acid treatment for 45 to 60 minutes to obtain acid-treated pulp; seventhly, removing sand: and (3) removing and separating impurities in the pulp subjected to acid treatment for the second time by using a sand remover, and washing the pulp for the second time by using soft water to obtain the reed pulp for the viscose fibers.
The following is further optimization or/and improvement of the technical scheme of the invention:
in the first step, the ash content of the reed pulp board for papermaking is 2.02 percent, and the iron content is 92 mg/Kg.
In the first step, the content of alpha fibers in the slurry with high-purity alpha fiber content obtained after alkali impregnation is 96.0-97.3%.
In the third step, the addition amount of the hydrochloric acid is 0.5 to 0.6g of hydrochloric acid per liter of the washed slurry.
In the fifth step, the content of the available chlorine in the sodium hypochlorite is 0.4g/L to 0.6 g/L.
In the second step, the concentration of the slurry after washing is 5% to 8%.
The invention has simple process, low raw material cost and little pollution generated in production, the obtained reed pulp for viscose fiber has low ash content and iron content, and the pulp has high whiteness, meets the standard of the viscose fiber paper-modified wood pulp first-class products, and is more suitable for the market needs in the future.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: the method for producing the reed pulp for the viscose fiber by using the reed pulp plate is carried out according to the following steps: first step, alkali impregnation: carrying out alkali impregnation on a reed pulp board for papermaking by using liquid alkali with the concentration of 80g/L to 100g/L to obtain pulp with high-purity alpha-cellulose content; step two, washing materials: sequentially washing the slurry with high-purity alpha fiber content by using soft water at the temperature of 58-60 ℃ for the first time to obtain washed slurry; step three, acid preparation: pre-acid treating the washed slurry with hydrochloric acid for 40-60 min to obtain pre-acid slurry; fourthly, pre-desanding: removing and separating impurities in the slurry subjected to the pre-acidification for the first time through a sand remover to obtain purified slurry; step five, bleaching with sodium hypochlorite: bleaching the purified pulp for 110 to 150 minutes by a traditional sodium hypochlorite bleaching process to obtain bleached pulp; sixthly, acid treatment: adding oxalic acid and sodium hexametaphosphate acid into the bleached pulp at the temperature of between 58 and 60 ℃ to perform acid treatment for 45 to 60 minutes to obtain acid-treated pulp; seventhly, removing sand: and (3) removing and separating impurities in the pulp subjected to acid treatment for the second time by using a sand remover, and washing the pulp for the second time by using soft water to obtain the reed pulp for the viscose fibers.
According to the invention, through a self-designed reed pulp modification method, acid treatment is added before rinsing in the production process, and soft water is used for washing, so that the ash content and the iron content are effectively reduced, and the alpha fiber content in the obtained reed pulp product is higher than 94.0%.
Compared with the prior art that pulp plates produced by Tacheng reeds are used as raw materials to produce reed pulp for viscose fibers, the method increases supply chain channels, reduces the cost of raw materials and improves the capability of resisting market change risks compared with the method that imported pulp is used as raw materials by Kuerler fiber companies of the Tachen textile group at the present stage.
Compared with the production of cotton pulp, the invention basically has no black liquor, reduces the water consumption and simultaneously lightens the pressure of wastewater treatment in downstream workshops.
Example 2: the method for producing the reed pulp for the viscose fiber by using the reed pulp plate is carried out according to the following steps: first step, alkali impregnation: carrying out alkali impregnation on a reed pulp board for papermaking by using liquid alkali with the concentration of 80g/L or 100g/L to obtain pulp with high-purity alpha-cellulose content; step two, washing materials: sequentially washing the slurry with high-purity alpha fiber content by using soft water at 58 ℃ or 60 ℃ for the first time to obtain washed slurry; step three, acid preparation: pre-acid treating the washed slurry with hydrochloric acid for 40 minutes or 60 minutes to obtain pre-acid slurry; fourthly, pre-desanding: removing and separating impurities in the slurry subjected to the pre-acidification for the first time through a sand remover to obtain purified slurry; step five, bleaching with sodium hypochlorite: bleaching the purified pulp for 110 minutes or 150 minutes by a traditional sodium hypochlorite bleaching process to obtain bleached pulp; sixthly, acid treatment: adding oxalic acid and sodium hexametaphosphate into the bleached pulp at the temperature of 58 ℃ or 60 ℃ to carry out acid treatment for 450 minutes or 60 minutes to obtain acid-treated pulp; seventhly, removing sand: and (3) removing and separating impurities in the pulp subjected to acid treatment for the second time by using a sand remover, and washing the pulp for the second time by using soft water to obtain the reed pulp for the viscose fibers.
Example 3: as optimization of the above example, in the first step, ash content of the reed pulp sheet for papermaking was 2.02%, and iron content was 92 mg/Kg.
In the production process, soft water is used for washing, and chemical materials such as oxalic acid, sodium hexametaphosphate and the like are added in the acid treatment stage, so that the ash content detected in the final product is 0.22-0.25% at least, and the iron content is 20-25 mg/Kg at least.
Example 4: as an optimization of the above embodiment, in the first step, the content of the alpha fibers in the slurry with high-purity alpha fiber content obtained after the alkali impregnation is 96.0% to 97.3%.
The purification of alpha-cellulose with different alkali concentrations in the specific alkali impregnation is shown in Table 1. As can be seen from Table 1, the present invention can significantly improve the content of alpha fibers.
Example 5: as an optimization of the above example, in the third step, the amount of hydrochloric acid added is 0.5 g to 0.6g of hydrochloric acid per liter of the slurry after washing.
Example 6: as the optimization of the embodiment, in the fifth step, the content of the available chlorine of the sodium hypochlorite is 0.4g/L to 0.6 g/L.
Example 7: as an optimization of the above embodiment, in the second step, the slurry concentration of the slurry after washing is 5% to 8%.
The whiteness of the pulp board is 49 percent, after the pulp board is treated by acid in the process of the invention, the pulp board is bleached by sodium hypochlorite, the ash and iron content of the pulp is reduced, the whiteness is improved to 78 to 80 percent, meanwhile, when the reaction performance of 11 milliliters passes, the DP (polymerization degree, an important quality index of pulp) can not be controlled to be over high 620, the DP range can be controlled to be 570 to 610, because the reaction performance index can meet the requirement when the DP value is reduced to the interval value, the methyl fiber is not damaged too much, if the DP value is reduced again, the reaction performance can be better, but the methyl fiber can be low, other consumptions can be increased, and the time can be prolonged.
A batch (8 groups of data) of reed pulp for viscose fiber obtained by the invention is randomly extracted for performance test, and the result is shown in Table 2. As can be seen from Table 2, the DP, alpha cellulose content and iron content of the reed pulp obtained by the method all reach the standard of first-class products of the paper-modified wood pulp for viscose fibers, and the ash content and whiteness indexes are close to the standard of qualified products.
In conclusion, the process is simple, the raw material cost is low, the pollution generated in the production is small, the ash content and the iron content of the obtained reed pulp for the viscose fiber are low, the whiteness of the pulp is high, the standard of the first-class product of the paper-modified wood pulp for the viscose fiber is met, and the future market needs are met.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (6)
1. A method for producing reed pulp for viscose fiber by using reed pulp is characterized by comprising the following steps: first step, alkali impregnation: carrying out alkali impregnation on a reed pulp board for papermaking by using liquid alkali with the concentration of 80g/L to 100g/L to obtain pulp with high-purity alpha-cellulose content; step two, washing materials: sequentially washing the slurry with high-purity alpha fiber content by using soft water at the temperature of 58-60 ℃ for the first time to obtain washed slurry; step three, acid preparation: pre-acid treating the washed slurry with hydrochloric acid for 40-60 min to obtain pre-acid slurry; fourthly, pre-desanding: removing and separating impurities in the slurry subjected to the pre-acidification for the first time through a sand remover to obtain purified slurry; step five, bleaching with sodium hypochlorite: bleaching the purified pulp for 110 to 150 minutes by a traditional sodium hypochlorite bleaching process to obtain bleached pulp; sixthly, acid treatment: adding oxalic acid and sodium hexametaphosphate acid into the bleached pulp at the temperature of between 58 and 60 ℃ to perform acid treatment for 45 to 60 minutes to obtain acid-treated pulp; seventhly, removing sand: and (3) removing and separating impurities in the pulp subjected to acid treatment for the second time by using a sand remover, and washing the pulp for the second time by using soft water to obtain the reed pulp for the viscose fibers.
2. The method of claim 1, wherein the reed pulp for viscose rayon fiber is prepared from reed pulp, the ash content of reed pulp for paper making is 2.02%, and the iron content is 92 mg/Kg.
3. The method of producing a reed pulp for viscose fiber using a reed pulp sheet as claimed in claim 1 or 2, wherein the first step is a step in which the high-purity pulp having alpha-cellulose content obtained after alkali impregnation has an alpha-cellulose content of 96.0% to 97.3%.
4. The method of producing a reed pulp for viscose fiber using a reed pulp sheet as claimed in claim 1, 2 or 3, wherein the hydrochloric acid is added in an amount of 0.5 g to 0.6g per liter of the washed pulp in the third step.
5. The method of producing reed pulp for viscose fiber using reed pulp sheet as in claim 1 or 2 or 3 or 4, wherein in the fifth step, the content of sodium hypochlorite available chlorine is 0.4g/L to 0.6 g/L.
6. The process for producing reed pulp for viscose fiber using reed pulp sheet as claimed in claim 1, 2, 3, 4 or 5, wherein in the second step, the pulp concentration of the washed pulp is 5% to 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227984.3A CN113882182A (en) | 2021-10-21 | 2021-10-21 | Method for producing reed pulp for viscose fiber by using reed pulp board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227984.3A CN113882182A (en) | 2021-10-21 | 2021-10-21 | Method for producing reed pulp for viscose fiber by using reed pulp board |
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| Publication Number | Publication Date |
|---|---|
| CN113882182A true CN113882182A (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111227984.3A Pending CN113882182A (en) | 2021-10-21 | 2021-10-21 | Method for producing reed pulp for viscose fiber by using reed pulp board |
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| CN (1) | CN113882182A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148832A (en) * | 2007-11-12 | 2008-03-26 | 宜宾长毅浆粕有限责任公司 | Paper-making-stage high viscosity wood pulp plate denaturalization producing technique |
| CN102182090A (en) * | 2011-03-02 | 2011-09-14 | 山东海龙股份有限公司 | Composite pulp of paper pulp and cotton linter and preparation method thereof |
| CN102926256A (en) * | 2012-11-27 | 2013-02-13 | 保定天鹅股份有限公司 | Denatured production process of bamboo pulp for producing viscose fiber |
| CN102943403A (en) * | 2012-11-27 | 2013-02-27 | 保定天鹅股份有限公司 | Wood pulp denaturalization production process for producing viscose fibers |
| CN103061180A (en) * | 2012-12-21 | 2013-04-24 | 新疆博湖苇业股份有限公司 | Preparation method of Reed pulp used for viscose staple fiber |
| CN110886123A (en) * | 2019-11-14 | 2020-03-17 | 新疆中泰纺织集团有限公司 | Method for producing viscose fiber by modifying reed natural color paper pulp |
| CN112726248A (en) * | 2020-12-29 | 2021-04-30 | 新疆中泰纺织集团有限公司 | Apocynum pulp for viscose fiber and its preparing process |
-
2021
- 2021-10-21 CN CN202111227984.3A patent/CN113882182A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148832A (en) * | 2007-11-12 | 2008-03-26 | 宜宾长毅浆粕有限责任公司 | Paper-making-stage high viscosity wood pulp plate denaturalization producing technique |
| CN102182090A (en) * | 2011-03-02 | 2011-09-14 | 山东海龙股份有限公司 | Composite pulp of paper pulp and cotton linter and preparation method thereof |
| CN102926256A (en) * | 2012-11-27 | 2013-02-13 | 保定天鹅股份有限公司 | Denatured production process of bamboo pulp for producing viscose fiber |
| CN102943403A (en) * | 2012-11-27 | 2013-02-27 | 保定天鹅股份有限公司 | Wood pulp denaturalization production process for producing viscose fibers |
| CN103061180A (en) * | 2012-12-21 | 2013-04-24 | 新疆博湖苇业股份有限公司 | Preparation method of Reed pulp used for viscose staple fiber |
| CN110886123A (en) * | 2019-11-14 | 2020-03-17 | 新疆中泰纺织集团有限公司 | Method for producing viscose fiber by modifying reed natural color paper pulp |
| CN112726248A (en) * | 2020-12-29 | 2021-04-30 | 新疆中泰纺织集团有限公司 | Apocynum pulp for viscose fiber and its preparing process |
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Application publication date: 20220104 |