CN102337688B - Mixed pulp used for producing viscose fiber and its production process - Google Patents
Mixed pulp used for producing viscose fiber and its production process Download PDFInfo
- Publication number
- CN102337688B CN102337688B CN 201110071537 CN201110071537A CN102337688B CN 102337688 B CN102337688 B CN 102337688B CN 201110071537 CN201110071537 CN 201110071537 CN 201110071537 A CN201110071537 A CN 201110071537A CN 102337688 B CN102337688 B CN 102337688B
- Authority
- CN
- China
- Prior art keywords
- pulp
- minutes
- alkali
- boiling
- mpa
- Prior art date
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000000835 fiber Substances 0.000 title claims abstract description 18
- 229920000297 Rayon Polymers 0.000 title claims abstract description 11
- 238000009835 boiling Methods 0.000 claims abstract description 44
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 38
- 229920000742 Cotton Polymers 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004061 bleaching Methods 0.000 claims abstract description 16
- 238000010306 acid treatment Methods 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 12
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims description 31
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 23
- 229920002472 Starch Polymers 0.000 claims description 22
- 239000008107 starch Substances 0.000 claims description 22
- 235000019698 starch Nutrition 0.000 claims description 22
- 238000009874 alkali refining Methods 0.000 claims description 15
- 230000009257 reactivity Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 230000000740 bleeding effect Effects 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000009898 sodium hypochlorite bleaching Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000007380 fibre production Methods 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000002386 leaching Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002972 pentoses Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
The invention discloses mixed pulp used for producing viscose fiber and its production process, which is characterized in that the mixed pulp is composed of bleached wood pulp and bleached cotton pulp according to weight ratio of 70: 90: 10-30, the process comprises the following steps: preparing materials, boiling, bleaching, performing acid-treatment, papermaking to obtain the mixed pulp. The polymerization degree of the mixed pulp is 500 DP-600 DP, alpha cellulose is greater than or equal to 94.5%, the ash content is less than or equal to 0.1%, iron is less than or equal to 18ppm, the reaction performance is less than or equal to 100s, the whiteness is 80%-85%, small dust is less than or equal to 140mg/cm<2>. The process of the invention is simple, the production has no pollution, so that practical problem of raw material shortage can be solved, the chemical fiber production cost is substantially reduced, and the product quality is enhanced.
Description
Technical field
The present invention relates to a kind of textile industry raw material pulp, specifically a kind of mixing pulp and production technology for the production of viscose, particularly relate to a kind of utilize that bleached wood pulp and bleached cotton starch produce mix pulp and production technology.
Background technology
At present, the raw material pulp as textile industry generally has Cotton Pulp, bamboo pulp, wood pulps etc., and its key technical indexes exists one to be first fibre low (88 ﹪～92 ﹪); The 2nd, ash high (〉=0.2 ﹪); The 3rd, the iron content weight (〉=30ppm); The 4th, unstable and time long (more than the 200s) of reactivity worth, and also difficult control on cost.This four large difficult point of pulp has been brought a series of technique obstacles such as dyeing difficulty, production time elongation to chemical fibre manufacturer.
Summary of the invention
The purpose of this invention is to provide a kind of mixing pulp and production technology for the production of viscose, this mixing pulp utilizes bleached wood pulp and bleached cotton starch production, its leading indicator of mixing pulp is that the degree of polymerization is 500DP-600DP, first fibre 〉=94.5 ﹪, ash≤0.1 ﹪, iron≤18ppm, reactivity worth≤100s, whiteness 80 ﹪-85 ﹪, little dust≤140 ㎎/㎝
2
The present invention adopts following technical scheme to realize its goal of the invention, a kind of mixing pulp for the production of viscose, by weight, it is by bleached wood pulp: bleached cotton starch=70～90:10～30 are prepared from through boiling, bleaching, acid treatment, after manufacturing paper with pulp, and the degree of polymerization of described mixing pulp is 500DP～600DP, first fibre 〉=94.5 ﹪, ash≤0.1 ﹪, iron≤18ppm, reactivity worth≤100s, whiteness 80 ﹪～85 ﹪, little dust≤140 ㎎/㎝
2
The present invention by weight, the ratio of greater inequality of bleached wood pulp and bleached cotton starch is 90:10.
A kind of production method of above-mentioned mixing pulp, it comprises the following steps:
⑴ get the raw materials ready: by proportioning that bleached wood pulp is even through the shredding of paging pulverizer, through cyclone separator with spray alkali lye and mix and fall into conveying worm and send into rotary spherical digester; By proportioning that bleached cotton starch is even through the opener shredding, through cyclone separator with spray alkali lye and mix and fall into conveying worm and send into rotary spherical digester;
⑵ boiling: bleached wood pulp adopts the two step boilings of prehydrolysis soda processes, for the first time boiling is boiled process, by weight, the liquor ratio of bleached wood pulp and water is 1:3.5 to 1:4.0, heated up 40 minutes for the first time, pressure is from 0.00Mpa～0.50Mpa, 30 ℃～140 ℃ of temperature, pressure carries out little steam bleeding during to 0.50Mpa, deflation time 20 minutes, steam bleeding pressure carries out heating up 30 minutes time to 0.20Mpa the second time, intensification pressure is from 0.20Mpa～0.60Mpa, 140 ℃～160 ℃ of temperature are incubated 120 minutes, and the pressure during insulation is 0.60Mpa, holding temperature is 160 ℃, carries out soda boiling technique behind the poach; Bleached cotton starch adopts soda processes soda boiling technique;
⑶ bleaching: to bleached wood pulp, carry out first alkali refining, alkali refining alkalinity 0.7g/l～0.8g/l, 90 ℃ of alkali refining temperature, 90 minutes alkali refining time, then the residual alkali of washing adopt sodium hypochlorite bleaching technique behind the alkali refining to 0.05g/l; Bleached cotton starch is adopted sodium hypochlorite bleaching technique;
⑷ acid treatment: adopt hydrochloric acid to carry out acid treatment to bleached wood pulp, bleached cotton starch;
⑸ manufacture paper with pulp: the wood pulps after the acid treatment, Cotton Pulp are mixed in the pond of manufacturing paper with pulp by proportioning, send into the pulp machine finished product of manufacturing paper with pulp out after propeller stirs 15 minutes-20 minutes.
The present invention is in step ⑵, the soda boiling technique of described bleached wood pulp is for by weight, alkali charge is 4 ﹪～6 ﹪ of bleached wood pulp, digesting assistant 0.3 ﹪, the soda boiling liquor ratio is 1:3.2 to 1:4.0, dense 15.1 g/l of goal alkali～16.1g/l, 80 ℃～90 ℃ of alkali temperature, heat preservation pressure 0.60 Mpa～0.65Mpa, temperature retention time 115 minutes～125 minutes, viscosity 9.5mpa.s～10.5mpa.s after the boiling.
The present invention is in step ⑵, the soda boiling technique of described bleached cotton starch is for by weight, alkali charge is 16.5 ﹪～18.5 ﹪ of cotton linter, digesting assistant 0.3 ﹪, soda boiling liquor ratio 1:3.2 to 1:4.2, dense 50 g/l of goal alkali～52g/l, 90 ℃～100 ℃ of alkali temperature, heat preservation pressure 0.65 Mpa～0.74Mpa, temperature retention time 130 minutes～140 minutes, viscosity 8.8mpa.s～9.5mpa.s after the boiling.
The present invention is in step ⑵, and the bottom steam admission mode is adopted in the admission of rotary spherical digester during boiling.
Because adopt technique scheme, the present invention has realized goal of the invention preferably, its technique is simple, produces pollution-freely, has solved the practical difficulty of raw material anxieties, greatly reduce the chemical fibre production cost, has improved the quality of product.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1:
A kind of mixing pulp for the production of viscose, by weight, it is by bleached wood pulp: bleached cotton starch=70～90:10～30(present embodiment is 70:30) be prepared from through boiling, bleaching, acid treatment, after manufacturing paper with pulp, the degree of polymerization of described mixing pulp is 500DP～600DP, first fibre 〉=94.5 ﹪, ash≤0.1 ﹪, iron≤18ppm, reactivity worth≤100s, whiteness 80 ﹪～85 ﹪, little dust≤140 ㎎/㎝
2
Described bleached wood pulp is bleaching needle-point leaf pulp, and its degree of polymerization is 950DP～1050DP, first fibre 〉=87.5 ﹪, ash≤0.1 ﹪, iron≤20ppm, viscosity 25 mpa.s～30 mpa.s, whiteness 88 ﹪～90 ﹪, little dust≤100 ㎎/㎝
2Present embodiment is that the degree of polymerization is 950DP, first fibre=88.5 ﹪, ash=0.1 ﹪, iron=20ppm, viscosity 25 mpa.s, whiteness 88 ﹪, little dust=100 ㎎/㎝
2
Described bleached cotton starch is the bleached cotton starch by the cotton linter preparation, its cotton linter short flannel maturity 〉=30%, sulfuric acid insoluble matter≤14%, ash≤2.2%, moisture≤10%.Bleached cotton starch first fibre 〉=95.0 ﹪ of preparation, ash≤0.1 ﹪, iron≤20ppm, viscosity 9.5 mpa.s～10.5 mpa.s, whiteness 81 ﹪, little dust≤140 ㎎/㎝
2
A kind of production method of mixing as mentioned above pulp, it comprises the following steps:
⑴ get the raw materials ready: by proportioning that bleached wood pulp is even through the shredding of paging pulverizer, through cyclone separator with spray alkali lye and mix and fall into conveying worm and send into rotary spherical digester; By proportioning that bleached cotton starch is even through the opener shredding, through cyclone separator with spray alkali lye and mix and fall into conveying worm and send into rotary spherical digester;
⑵ boiling: be the non-cellulosic impurity content (such as hemicellulose, lignin, pentosan etc.) in removal or the reduction bleached wood pulp, improve the purity of pulp; Weaken simultaneously connection between alkali resistant pentosan and cellulose, the structure of loose cell membrane is destroyed fibrocellular primary wall, makes to be rich in cellulosic secondary wall and to come out, for the reactivity worth that improves pulp creates conditions.Bleached wood pulp adopts the two step boilings of prehydrolysis soda processes, for the first time boiling is boiled process, by weight, the liquor ratio of bleached wood pulp and water is that 1:3.5 to 1:4.0(present embodiment is 1:3.8), heated up 40 minutes for the first time, pressure is 0.50Mpa from 0.00Mpa～0.50Mpa(present embodiment), 30 ℃～140 ℃ of temperature (present embodiment is 140 ℃), pressure carries out little steam bleeding during to 0.50Mpa, deflation time 20 minutes, steam bleeding pressure carries out heating up to 0.20Mpa the second time, and 30 minutes time, intensification pressure is 0.60Mpa from 0.20Mpa～0.60Mpa(present embodiment), 140 ℃～160 ℃ of temperature (present embodiment is 160 ℃), be incubated 120 minutes, the pressure during insulation is 0.60Mpa, and holding temperature is 160 ℃.
Carry out soda processes soda boiling technique behind the poach: its soda boiling technique is for by weight, alkali charge is 4 ﹪～6 ﹪ (present embodiment is 5 ﹪) of bleached wood pulp, digesting assistant 0.3 ﹪, the soda boiling liquor ratio is that 1:3.2 to 1:4.0(present embodiment is 1:3.5), dense 15.1 g/l of goal alkali～16.1g/l(present embodiment is 15.5g/l), 80 ℃～90 ℃ of alkali temperature (present embodiment is 90 ℃), heat preservation pressure 0.60 Mpa～0.65Mpa(present embodiment is 0.64Mpa), temperature retention time 115 minutes～125 minutes (present embodiment is 120 minutes), viscosity 9.5mpa.s～10.5mpa.s(present embodiment is 9.8mpa.s after the boiling).
Bleached cotton starch also adopts soda processes soda boiling technique: its soda boiling technique is for by weight, alkali charge is 16.5 ﹪～18.5 ﹪ (present embodiment is 17.5 ﹪) of cotton linter, digesting assistant 0.3 ﹪, soda boiling liquor ratio 1:3.2 to 1:4.2(present embodiment is 1:3.4), dense 50 g/l of goal alkali～52g/l(present embodiment is 51g/l), 90 ℃～100 ℃ of alkali temperature (present embodiment is 100 ℃), heat preservation pressure 0.65 Mpa～0.74Mpa(present embodiment is 0.72Mpa), temperature retention time 130 minutes～140 minutes (present embodiment is 130 minutes), viscosity 8.8mpa.s～9.5mpa.s(present embodiment is 9.3mpa.s after the boiling).
Described digesting assistant is the patent No. 200810233199.7, December 3 2008 applying date, disclosed a kind of cotton pulp steam boiling additive.
During boiling, existing steam admission mode is " one " word pipe middle part of rotary spherical digester (namely) admission, this admission drawback is: when boiling behind certain hour, raw material in the rotary spherical digester shrink, the rotary spherical digester internal upper part divides namely 1/3 to be empty, at this moment raw material can not evenly be subjected to vapour and all be subjected to vapour, cause the first fibre not high long with digestion time.
The present invention is in step ⑵, and the bottom steam admission mode is all adopted in the admission of rotary spherical digester during boiling, and its steam is come in the bottom of rotary spherical digester all the time, is penetrated into from the bottom to top in the raw material, and admission is even, can effectively keep the shortening of content and the digestion time of first fibre.
⑶ bleaching: for further removing lignin and the pentose in the boiling disposed slurry, improve purity and the respond of pulp, bleached wood pulp is carried out first alkali refining, alkali refining alkalinity 0.7g/l, 90 ℃ of alkali refining temperature, 90 minutes alkali refining time, the residual alkali of washing is to 0.05g/l behind the alkali refining; Then adopt conventional sodium hypochlorite bleaching technique, bleaching temperature: 45 ℃, bleach chloride 0.30g/l, bleaching contains alkali: 0.09g/l, and bleaching time 60 minutes is below the chloride 0.05g/l of bleaching terminal point.
Bleached cotton starch is adopted conventional sodium hypochlorite bleaching, advance to starch chloride: 0.10 g/l, advance slurry and contain alkali 0.05 g/l, 45 ℃ of bleaching temperatures are bleached chloride 0.35 g/l, and bleaching contains alkali 0.10g/l, and bleaching time 80 minutes is below the chloride 0.10g/l of bleaching terminal point.
⑷ acid treatment: the acid treatment process of bleached cotton starch and bleached wood pulp is identical, is specially: vexed sour acid content 1.0g/l, vexed 40 minutes time of acid, vexed sour temperature 45 C.
⑸ manufacture paper with pulp: the wood pulps after the acid treatment, Cotton Pulp are mixed in the pond of manufacturing paper with pulp by proportioning, stir through propeller and sent into the pulp machine finished product of manufacturing paper with pulp out in 15 minutes-20 minutes after (present embodiment is 20 minutes).Its degree of polymerization of mixing pulp is 550DP, first fibre=95.5 ﹪, ash=0.1 ﹪, iron=15ppm, reactivity worth=95s, whiteness 81 ﹪, little dust=130 ㎎/㎝
2
Embodiment 2:
In step ⑴, bleached wood pulp: bleached cotton starch=90:10, the degree of polymerization of the mixing pulp of preparation is 520DP, first fibre=94.5 ﹪, ash=0.1 ﹪, iron=15ppm, reactivity worth=80s, whiteness 82 ﹪, little dust=120 ㎎/㎝
2Remaining with embodiment 1.
Embodiment 3:
Bleached wood pulp: bleached cotton starch=80:20, the degree of polymerization of the mixing pulp of preparation is 560DP, first fibre=94.5 ﹪, ash=0.10 ﹪, iron=18ppm, reactivity worth=95 s, whiteness 81 ﹪, little dust=140 ㎎/㎝
2Remaining with embodiment 1.
Embodiment 4:
Bleached wood pulp: bleached cotton starch=95:5, the degree of polymerization of the mixing pulp of preparation is 500DP, first fibre=93.0 ﹪, ash=0.10 ﹪, iron=20ppm, reactivity worth＞100 s, whiteness 81 ﹪, little dust=140 ㎎/㎝
2Remaining with embodiment 1.
We can find out by above 4 embodiment, mix pulp along with the increase of wood pulp proportioning and the variation of process conditions, quality index is also changing, the wood pulp proportioning surpasses 90%, the mixing pulp reactivity worth of producing can not by and the first fibre on the low side, and proportioning indices 80% time all can reach quality standards but production cost can rise, so best proportioning is 9:1, the mixing pulp of producing can reach quality requirement makes again production cost be controlled at zone of reasonableness.
Claims (4)
1. production method for the production of the mixing pulp of viscose, it is characterized in that described mixing pulp is prepared from through boiling, bleaching, acid treatment, after manufacturing paper with pulp by wood pulp, cotton pulp, the degree of polymerization of described mixing pulp is 500DP～600DP, first fibre 〉=94.5 ﹪, ash≤0.1 ﹪, iron≤18ppm, reactivity worth≤100s, whiteness 80 ﹪～85 ﹪, little dust≤140 ㎎/㎝
2, it comprises the following steps:
⑴ get the raw materials ready: wood pulp is even through the shredding of paging pulverizer, mix to fall into conveying worm and send into rotary spherical digester with spray alkali lye through cyclone separator; Cotton pulp is even through the opener shredding, mix to fall into conveying worm and send into rotary spherical digester with spray alkali lye through cyclone separator;
⑵ boiling: wood pulp adopts the two step boilings of prehydrolysis soda processes, for the first time boiling is boiled process, by weight, the liquor ratio of wood pulp and water is 1:3.5 to 1:4.0, heated up 40 minutes for the first time, pressure is from 0.00 MPa to 0.50 MPa, 30 ℃ to 140 ℃ of temperature, carry out little steam bleeding during pressure to 0.50 MPa, 20 minutes steam bleeding time, steam bleeding pressure to 0.20 MPa carries out heating up 30 minutes time the second time, intensification pressure is from 0.20 MPa to 0.60 MPa, 140 ℃ to 160 ℃ of temperature are incubated 120 minutes, and the pressure during insulation is 0.60 MPa, holding temperature is 160 ℃, carries out soda boiling technique behind the poach; Cotton pulp adopts soda processes soda boiling technique;
⑶ bleaching: to wood pulp, carry out first alkali refining, alkali refining alkalinity 0.7 g/L～0.8 g/L, 90 ℃ of alkali refining temperature, below residual alkali to 0.05 g/L of washing, then adopt sodium hypochlorite bleaching technique behind the alkali refining at 90 minutes alkali refining time; Cotton pulp is adopted sodium hypochlorite bleaching technique;
⑷ acid treatment: adopt hydrochloric acid to carry out acid treatment to bleached wood pulp, bleached cotton starch;
⑸ manufacture paper with pulp: the wood pulps after the acid treatment, Cotton Pulp are mixed in the pond of manufacturing paper with pulp by the proportioning of 70～90:10～30, send into the pulp machine finished product of manufacturing paper with pulp out after propeller stirs 15 minutes-20 minutes.
2. the production method of described mixing pulp for the production of viscose according to claim 1, it is characterized in that in step ⑵, the soda boiling technique of described wood pulp is for by weight, and alkali charge is 4 ﹪～6 ﹪ of wood pulp, digesting assistant 0.3 ﹪, the soda boiling liquor ratio is 1:3.2 to 1:4.0, dense 15.1 g/L of goal alkali～16.1 g/L, 80 ℃～90 ℃ of alkali temperature, heat preservation pressure 0.60 MPa～0.65 MPa, temperature retention time 115 minutes～125 minutes, viscosity 9.5 mPas～10.5 mPas after the boiling.
3. the production method of described mixing pulp for the production of viscose according to claim 1, it is characterized in that in step ⑵, the soda boiling technique of described cotton pulp is for by weight, and alkali charge is 16.5 ﹪～18.5 ﹪ of cotton linter, digesting assistant 0.3 ﹪, soda boiling liquor ratio 1:3.2 to 1:4.2, dense 50 g/L of goal alkali～52 g/L, 90 ℃～100 ℃ of alkali temperature, heat preservation pressure 0.65 MPa～0.74 MPa, temperature retention time 130 minutes～140 minutes, viscosity 8.8 mPas～9.5 mPas after the boiling.
4. the production method of described mixing pulp for the production of viscose according to claim 1 is characterized in that in step ⑵ the bottom steam admission mode is adopted in the admission of rotary spherical digester during boiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110071537 CN102337688B (en) | 2011-03-24 | 2011-03-24 | Mixed pulp used for producing viscose fiber and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110071537 CN102337688B (en) | 2011-03-24 | 2011-03-24 | Mixed pulp used for producing viscose fiber and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102337688A CN102337688A (en) | 2012-02-01 |
| CN102337688B true CN102337688B (en) | 2013-03-20 |
Family
ID=45513618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110071537 Active CN102337688B (en) | 2011-03-24 | 2011-03-24 | Mixed pulp used for producing viscose fiber and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102337688B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338774A (en) * | 2018-09-18 | 2019-02-15 | 巴州泰昌浆粕有限公司 | Cellulose mixture pulp and preparation method thereof |
| CN109778580B (en) * | 2019-01-31 | 2022-01-21 | 山东银鹰股份有限公司 | Preparation method of cotton pulp for high-strength filter paper |
| CN116289284B (en) * | 2023-04-11 | 2024-04-30 | 安徽雪龙新材料(集团)有限公司 | Preparation method of biodegradable nanocellulose cotton pulp |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003901396A0 (en) * | 2003-03-25 | 2003-04-10 | Commonwealth Scientific And Industrial Research Organisation | Methods for bleaching of cellulosic materials |
| CN100335690C (en) * | 2005-12-31 | 2007-09-05 | 山东海龙股份有限公司 | Process for producing viscose fiber filament yarn by low polymerization degree pulp |
| CN100449039C (en) * | 2006-05-08 | 2009-01-07 | 宜宾丝丽雅股份有限公司 | Cotton and wood composite cellulose pulp and method for producing same |
| CN101104959A (en) * | 2007-06-14 | 2008-01-16 | 山东海龙股份有限公司 | Method for preparing viscose fiber |
-
2011
- 2011-03-24 CN CN 201110071537 patent/CN102337688B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102337688A (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101148836B (en) | Paper-making-stage bamboo wood pulp plate denaturalization producing technique | |
| CN100395403C (en) | Oxygen delignify treating method for grass group unbleached chemical pulp | |
| CN101565863A (en) | Preparation method of hemp dissolving pulp | |
| CN111618961B (en) | Preparation method of viscose-grade bamboo wood dissolving pulp | |
| CN101058953A (en) | Method of preparing bleaching dissolved pulp from corn stem | |
| CN100402745C (en) | Prepared bleach chemical pulp using grass kind plant as raw material and preparation method thereof | |
| CN102337688B (en) | Mixed pulp used for producing viscose fiber and its production process | |
| CN102677505B (en) | Steaming process for modifying bleaching bamboo paper pulp and bleaching wood paper pulp into dissolving pulp in compound way | |
| CN102677504B (en) | Manufacturing process of antibacterial bamboo pulp used for high-wet-modulus fibre | |
| CN102174752A (en) | Preparation method of wood pulp for fibranne | |
| CN101148834B (en) | Paper-making-stage broad-leaved wood pulp plate denaturalization producing technique | |
| CN102312386B (en) | Boiling method for preparing dissolving pulp by use of bleached chemical paper pulp | |
| CN102644212B (en) | Preparation method of industrial hemp full stalk pulp | |
| CN101158124A (en) | Paper-making grade pulp bleaching plate modifying production technique | |
| CN101435164B (en) | Modified production process of paper making level sulphate wood pulp plate | |
| CN1318688C (en) | Impregnation pretreatment technology of raw material used in soda process pulp making | |
| CN101381895A (en) | Pulping method without pollution and dissolving pulp produced | |
| CN101148832B (en) | Paper-making-stage high viscosity wood pulp plate denaturalization producing technique | |
| CN101967765B (en) | High-beating-degree cotton pulp product used for banknote paper and production method thereof | |
| CN101148835A (en) | Paper-making-stage wood pulp plate denaturalization producing technique | |
| CN102277762A (en) | Process for producing dissolving pulp by utilizing bleaching wood pulp board | |
| CN101148837B (en) | Paper-making-stage primary color wood pulp plate denaturalization producing technique | |
| CN100406646C (en) | Prepared high hardness pulp using grass kind plant as raw material and preparation method thereof | |
| CN101158125A (en) | Paper-making grade softwood pulp plate modifying production technique | |
| CN101148833B (en) | Paper-making-stage reclaiming wood pulp plate denaturalization producing technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 413200 Yinhe Road, Maocaojie Town, Nanxian County, Yiyang City, Hunan Province Patentee after: Hunan Jixiang Biotechnology Co.,Ltd. Address before: 413200 Maocaojie Town, Nanxian County, Yiyang City, Hunan Province Patentee before: Hunan Top Bamboo Hemp Industry Development Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 501-1, Enterprise Office Service Building, Nanxian Economic Development Zone, Nanzhou Town, Nanxian County, Yiyang City, Hunan Province, 413000 Patentee after: Hunan Jixiang New Materials Co.,Ltd. Country or region after: China Address before: 413200 Yinhe Road, Maocaojie Town, Nanxian County, Yiyang City, Hunan Province Patentee before: Hunan Jixiang Biotechnology Co.,Ltd. Country or region before: China |