CN102926253A - Method for pulping through needlebush pre-conditioning refiner chemical alkaline peroxide mechanical pulp (P-RC APMP) - Google Patents
Method for pulping through needlebush pre-conditioning refiner chemical alkaline peroxide mechanical pulp (P-RC APMP) Download PDFInfo
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Abstract
The invention relates to the technical field of pulping and papermaking, in particular to a method for pulping through needlebush pre-conditioning refiner chemical alkaline peroxide mechanical pulp (P-RC APMP), wherein the first period of extrusion processing of needlebush pieces after being steamed is subjected, the first period of chemical processing is subjected after chemical liquid A is added, the chemical liquid A contains sodium dodecyl benzene sulfonate and octyl phenol polyoxyethylene ether (10), the second period of extrusion processing is subjected, the second period of chemical processing is subjected by adding chemical liquid B after the second period of extrusion, the chemical liquid B contains the sodium dodecyl benzene sulfonate and the octyl phenol polyoxyethylene ether (10), the first period of defibrination is subjected after processing and stops, and then the second period of defibrination and eliminate hidden processing are subjected to obtain needlebush P-RC APMP paper pulp. The method for pulping through needlebush P-RC APMP strengthens chemical action of impregnation liquid and dissolution of reactants, softens fiber materials, reduces subsequent pulping energy consumption, improves fiber quality, increases pulp whiteness, reduces pulp resin content, and reduces resin obstacle.
Description
Technical field
The present invention relates to the pulp and paper technology field, particularly the method for a kind of needlebush P-RC APMP slurrying.
Background technology
P-RC APMP is mill Chemical Pretreatment alkaline hydrogen peroxide machine slurry (Preconditioning Refiner Chemical APMP), is the improvement of conventional APMP pulping technique.P represents the front preliminary treatment of defibrination, and RC represents mill and promotes the chemical reaction of slurry and wood chip reacts between through the preimpregnation after bleaching reasonable distribution.For reaching best bleaching efficiency, most bleaching action is finished in the preliminary treatment that the P-RC arts demand relatively relaxes under the defibrination chemical pretreatment condition.The time of staying of slurry in disc mill is shorter, needs to have high dense stop course of reaction behind the defibrination.The great advantage of utilizing the P-RC system is to utilize high temperature in the mill blow-off pipe, high condition dense, high pressure to realize distributing slurry and fully mixing with even of liquid, and finishes discoloration in the dense tower of height.Slurry directly spurts to reaction tower from one section mill, proceeds the high density bleaching reaction, has overcome short problem of APMP reaction time.Most of bleaching action is dense at height, finish under the hot conditions, rather than the bleaching wood chip.Traditional APMP does not have high dense dwell phase behind the first paragraph defibrination, but carries out intersegmental dilution, washing, and washing procedure can stop many potential bleaching actions, thereby causes the decline of bleaching efficiency.
P-RC APMP basic procedure comprises: wood chip decatize → one section → one section chemical impregnation → two of extruding section → two sections chemical impregnation → one section defibrination → high dense stop → squeezing → two section defibrinations of extruding → disappear latent.With respect to conventional APMP, P-RC APMP technique has two key characters: (1) wood chip only passes through gentle chemical treatment when dipping, and temperature lower (40-50 ℃) has reduced the wood chip bleaching action in early stage; (2) main bleaching action carries out in one section mill and reaction tower, and the slurry bleaching has replaced the wood chip bleaching, and high dense reserving tower can provide enough time of staying for bleaching, has effectively utilized the residue chemistry product, can delay again whiteness simultaneously and reduce.But P-RC APMP is unfavorable to the pulp strength development, and each physical strength index has reduction in various degree.
P-RC APMP technique is flexible, utilize chemical method and Mechanical Method to improve pulp properties, can produce the character of similar Stone Ground Wood, but intensity is higher, light scattering coefficient is lower, and this is similar chemical pulp again, but has higher bulk than chemical pulp, thereby the capable part substituted chemistry slurry of P-RC APMP slurry, be conducive to reduce cost.
Present domestic P-RC APMP slurry mainly is to be used in to produce newsprint, write the paper kinds such as printing paper, featherweight coated paper, supercalendered paper, cardboard, paper for daily use, but Partial Replacement bleach chemical pulp and secondary stock.For needlebush P-RC APMP slurrying, because needlebush raw material lignin and resin content are high, caused that chemical impregnation efficient is low in process of production, refining energy consumption is high, and loss of strength is larger.In addition, the resin in the remaining slurry deposits in container and pipeline, forms the resin point at fiber, increases the dust of paper, is gathered in roll banding paste net on the pulping and papermaking equipments, causes that the broken end of paper web and production operation are undesired.
Summary of the invention
Low in order to solve in the above needlebush P-RC APMP pulping process chemical impregnation efficient, refining energy consumption is high, loss of strength is large, roll banding is stuck with paste the problem of net, the invention provides a kind of fiber quality that improves, improve pulp brightness, reduce pulp resin content, alleviate the method for the needlebush P-RC APMP slurrying of pitch trouble.
The present invention is achieved by the following measures:
The method of a kind of needlebush P-RC APMP slurrying, needlebush wood chip after the decatize carries out the first paragraph extrusion process, the extruding wood chip adds chemical liquid A and carries out the first paragraph chemical treatment, contain the neopelex that accounts for ovendriedwood quality 0.1-0.2% and octyl phenol polyoxyethylene (10) ether of 0.1-0.2% among the chemical liquid A, carry out the second segment extrusion process after the first paragraph chemical treatment, add chemical liquid B after the second segment extruding and carry out the second segment chemical treatment, contain the neopelex that accounts for oven dry stock quality 0.2-0.3% and octyl phenol polyoxyethylene (10) ether of 0.2-0.3% among the chemical liquid B, processing is carried out the first paragraph defibrination after finishing, stop behind the first paragraph defibrination, carry out afterwards the second segment defibrination and disappear to dive processing, obtain needlebush P-RC APMP paper pulp.
Described method also contains the NaOH that accounts for ovendriedwood quality 1.8-3.7%, the hydrogen peroxide of 1.6-3.5%, 2% sodium metasilicate, 0.05% magnesium sulfate, 0.2% ethylenediamine tetra-acetic acid among the chemical liquid A.
Described method, first paragraph chemical treatment conditions are temperature 65-75 ℃, liquor ratio 1:4, processing time 45-65 min.
Described method, treatment process condition is: also contain the NaOH that accounts for oven dry stock quality 3.0-4.5%, the hydrogen peroxide of 2.8-4.3%, 3% sodium metasilicate, 0.05% magnesium sulfate, 0.3% ethylenediamine tetra-acetic acid among the chemical liquid B.
Described method, second segment chemical treatment conditions are temperature 50-60 ℃, and time 40-60min starches dense 20-25%.
Beneficial effect of the present invention: the inventive method is on the basis of conventional P-RC APMP pulping technique, in the maceration extract of chemical treatment section, add neopelex and octyl phenol polyoxyethylene (10) ether, strengthen the chemical action of maceration extract and the stripping of reactant, the softening fibre material, and then reduce follow-up refining energy consumption, and improve fiber quality, improve pulp brightness, reduce pulp resin content, alleviate pitch trouble.
The specific embodiment
Below by specific embodiment the present invention is further set forth, following explanation is exemplary, does not limit the invention.If no special instructions, following content is the quality percentage composition.
Embodiment 1
Conventional pinus khasys P-RC APMP pulping chemistry pretreatment condition is: one section chemical treatment sodium hydroxide concentration 2.5%, hydrogen peroxide consumption 2.3%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 3.5%, hydrogen peroxide consumption 3.3%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 65 ℃ of temperature, liquor ratio 1:4, times 23 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 50 C, and times 55 min starches dense 22%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain pinus khasys P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 53.1
OSR, refining energy consumption are 1763 kWh/t slurries, whiteness 54.9%ISO, bulk 2.16 cm
3G
-1, burst index 2.53 KPam
2G
-1, tensile index 37.5 Nm/g, tear index 2.63 mNm
2G
-1, resin content 0.96%.
Adopt the technology of the present invention to carry out pinus khasys P-RC APMP production.One section chemical treatment conditions: sodium hydroxide concentration 2.5%, hydrogen peroxide consumption 2.3%, neopelex consumption 0.2%, octyl phenol polyoxyethylene (10) ether consumption 0.1%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 3.5%, hydrogen peroxide consumption 3.3%, neopelex consumption 0.23%, octyl phenol polyoxyethylene (10) ether consumption 0.30%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 65 ℃ of temperature, liquor ratio 1:4, times 23 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 50 C, and times 55 min starches dense 22%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain pinus khasys P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 53.0
OSR, refining energy consumption are 1562 kWh/t slurries, whiteness 56.8%ISO, bulk 2.15 cm
3G
-1, burst index 3.04 KPam
2G
-1, tensile index 43.3 Nm/g, tear index 2.92 mNm
2G
-1, resin content 0.52%.Compare with routine techniques, refining energy consumption has reduced by 11.4%, and whiteness has improved 1.9%ISO, and pulp physical strength improves, and resin content has reduced by 46.0%.
Embodiment 2
Conventional torch pine P-RC APMP pulping chemistry pretreatment condition is: one section chemical treatment conditions is sodium hydroxide concentration 2.5%, hydrogen peroxide consumption 2.7%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 50 C, liquor ratio 1:4, times 55 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 2.0%, hydrogen peroxide consumption 2.2%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 55 ℃ of temperature, liquor ratio 1:4, times 75 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 50 C, and times 55 min starches dense 22%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain torch pine P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 53.1
OSR, refining energy consumption are 1763 kWh/t slurries, whiteness 54.9%ISO, bulk 2.16 cm
3G
-1, burst index 2.53 KPam
2G
-1, tensile index 37.5 Nm/g, tear index 2.63 mNm
2G
-1, resin content 0.96%.
Adopt the technology of the present invention to carry out torch pine P-RC APMP production.One section chemical treatment conditions: sodium hydroxide concentration 2.5%, hydrogen peroxide consumption 2.3%, neopelex consumption 0.2%, octyl phenol polyoxyethylene (10) ether consumption 0.1%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 3.5%, hydrogen peroxide consumption 3.3%, neopelex consumption 0.23%, octyl phenol polyoxyethylene (10) ether consumption 0.30%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 65 ℃ of temperature, liquor ratio 1:4, times 23 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 50 C, and times 55 min starches dense 22%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain torch pine P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 53.0
OSR, refining energy consumption are 1550 kWh/t slurries, whiteness 56.9%ISO, bulk 2.15 cm
3G
-1, burst index 3.06 KPam
2G
-1, tensile index 43.7 Nm/g, tear index 2.97 mNm
2G
-1, resin content 0.52%.Compare with routine techniques, refining energy consumption has reduced by 12.1%, and whiteness has improved 2.0%ISO, and pulp physical strength improves, and resin content has reduced by 45.7%.
Embodiment 3
Conventional fir P-RC APMP pulping chemistry pretreatment condition is: one section chemical treatment conditions is sodium hydroxide concentration 3.0%, hydrogen peroxide consumption 2.8%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, 75 ℃ of temperature, liquor ratio 1:4, times 45 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 4.0%, hydrogen peroxide consumption 3.8%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, temperature 70 C, liquor ratio 1:4, times 30 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 60 C, and times 50 min starches dense 23%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain fir P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 50.6
OSR, refining energy consumption are 1542 kWh/t slurries, whiteness 57.4%ISO, bulk 2.13 cm
3G
-1, burst index 2.62 KPam
2G
-1, tensile index 38.3 Nm/g, tear index 2.71 mNm
2G
-1, resin content 0.93%.
Adopt the technology of the present invention to carry out fir P-RC APMP production.One section chemical treatment conditions: sodium hydroxide concentration 3.0%, hydrogen peroxide consumption 2.8%, neopelex consumption 0.1%, octyl phenol polyoxyethylene (10) ether consumption 0.12%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, 75 ℃ of temperature, liquor ratio 1:4, times 45 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 4.0%, hydrogen peroxide consumption 3.8%, neopelex consumption 0.3%, octyl phenol polyoxyethylene (10) ether consumption 0.23%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, temperature 70 C, liquor ratio 1:4, times 30 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 60 C, and times 50 min starches dense 23%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain fir P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 50.4
OSR, refining energy consumption are 1374 kWh/t slurries, whiteness 59.1%ISO, bulk 2.12 cm
3G
-1, burst index 3.11 KPam
2G
-1, tensile index 44.6 Nm/g, tear index 3.05 mNm
2G
-1, resin content 0.58%.Compare with routine techniques, refining energy consumption has reduced by 10.9%, and whiteness has improved 1.7%ISO, and pulp physical strength improves, and resin content has reduced by 37.5%.
Embodiment 4
Conventional masson pine P-RC APMP pulping chemistry pretreatment condition is: one section chemical treatment sodium hydroxide concentration 3.7%, hydrogen peroxide consumption 3.5%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 4.5%, hydrogen peroxide consumption 4.3%, sodium metasilicate consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 75 ℃ of temperature, liquor ratio 1:4, times 26 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 60 C, and times 54 min starches dense 25%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain masson pine P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 47.3
OSR, refining energy consumption are 1513 kWh/t slurries, whiteness 58.6%ISO, bulk 2.19 cm
3G
-1, burst index 2.47 KPam
2G
-1, tensile index 38.2 Nm/g, tear index 2.57 mNm
2G
-1, resin content 0.91%.
Adopt the technology of the present invention to carry out masson pine P-RC APMP production.One section chemical treatment conditions: sodium hydroxide concentration 3.7%, hydrogen peroxide consumption 3.5%, neopelex consumption 0.12%, octyl phenol polyoxyethylene (10) ether consumption 0.2%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, and treatment process condition is: sodium hydroxide concentration 4.5%, hydrogen peroxide consumption 4.3%, neopelex consumption 0.26%, octyl phenol polyoxyethylene (10) ether consumption 0.26%, sour sodium consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 75 ℃ of temperature, liquor ratio 1:4, times 26 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 60 C, and times 54 min starches dense 25%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain masson pine P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 47.4
OSR, refining energy consumption are 1336 kWh/t slurries, whiteness 61.1%ISO, bulk 2.17 cm
3G
-1, burst index 2.89 KPam
2G
-1, tensile index 43.5 Nm/g, tear index 2.91 mNm
2G
-1, resin content 0.47%.Compare with routine techniques, refining energy consumption has reduced by 11.7%, and whiteness has improved 2.5%ISO, and pulp physical strength improves, and resin content has reduced by 48.0%.
Adopt other surface-activity auxiliary agent to carry out masson pine P-RC APMP production.One section chemical treatment conditions: sodium hydroxide concentration 3.7%, hydrogen peroxide consumption 3.5%, Tween-80 consumption 0.32%, sodium metasilicate consumption 2%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.2%, temperature 70 C, liquor ratio 1:4, times 50 min.Carry out two sections extruding after the processing, the second segment chemical treatment is carried out in two sections extruding, treatment process condition is: sodium hydroxide concentration 4.5%, hydrogen peroxide consumption 4.3%, Tween-80 consumption 0.45%, acid sodium consumption 3%, magnesium sulfate consumption 0.05%, ethylenediamine tetra-acetic acid consumption 0.3%, 75 ℃ of temperature, liquor ratio 1:4, times 26 min.Processing is carried out one section defibrination after finishing, and carries out high dense stop behind one section defibrination and processes, and treatment process condition is temperature 60 C, and times 54 min starches dense 25%.Carry out afterwards two sections defibrinations and disappear to dive processing, obtain masson pine P-RC APMP paper pulp.Obtaining the pulp beating degree under this treatment process condition is 47.4
OSR, refining energy consumption are 1547 kWh/t slurries, whiteness 58.2%ISO, bulk 2.18 cm
3G
-1, burst index 2.41 KPam
2G
-1, tensile index 37.1 Nm/g, tear index 2.42 mNm
2G
-1, resin content 0.90%.Adopt this auxiliary agent to cause pulp brightness and physical strength that reduction is slightly arranged, refining energy consumption increases, and resin content changes very little.
The chemicals usage of using in the one section chemical treatment that lists among above-described embodiment 1-4 and the two sections chemical treatments, a part of just enumerating for technical scheme of the present invention is described, technical scheme of the present invention is not restricted to above-mentioned chemicals usage and treatment process, because when P-RC APMP slurrying, the selection of chemicals usage is diversified, no matter the combination of which kind of consumption, add therein neopelex and octyl phenol polyoxyethylene (10) ether, can both reach and increase substantially slurrying intensity, whiteness, reduce the purpose of energy consumption and resin content, this is that those skilled in the art can infer according to above-mentioned record, because can't be exhaustive, have just seldom given an example at this.
Claims (5)
1. the method for needlebush P-RC APMP slurrying, it is characterized in that the needlebush wood chip after the decatize carries out the first paragraph extrusion process, the extruding wood chip adds chemical liquid A and carries out the first paragraph chemical treatment, contain the neopelex that accounts for ovendriedwood quality 0.1-0.2% and octyl phenol polyoxyethylene (10) ether of 0.1-0.2% among the chemical liquid A, carry out the second segment extrusion process after the first paragraph chemical treatment, add chemical liquid B after the second segment extruding and carry out the second segment chemical treatment, contain the neopelex that accounts for oven dry stock quality 0.2-0.3% and octyl phenol polyoxyethylene (10) ether of 0.2-0.3% among the chemical liquid B, processing is carried out the first paragraph defibrination after finishing, stop behind the first paragraph defibrination, carry out afterwards the second segment defibrination and disappear to dive processing, obtain needlebush P-RC APMP paper pulp.
2. method according to claim 1 is characterized in that also containing among the chemical liquid A NaOH that accounts for ovendriedwood quality 1.8-3.7%, the hydrogen peroxide of 1.6-3.5%, 2% sodium metasilicate, 0.05% magnesium sulfate, 0.2% ethylenediamine tetra-acetic acid.
3. method according to claim 1 and 2 is characterized in that the first paragraph chemical treatment conditions is temperature 65-75 ℃, liquor ratio 1:4, processing time 45-65 min.
4. method according to claim 1 is characterized in that treatment process condition is: also contain the NaOH that accounts for oven dry stock quality 3.0-4.5%, the hydrogen peroxide of 2.8-4.3%, 3% sodium metasilicate, 0.05% magnesium sulfate, 0.3% ethylenediamine tetra-acetic acid among the chemical liquid B.
5. according to claim 1 or 4 described methods, it is characterized in that the second segment chemical treatment conditions is temperature 50-60 ℃, time 40-60min starches dense 20-25%.
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Cited By (6)
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| CN103088683A (en) * | 2013-02-28 | 2013-05-08 | 刘长如 | Clean pulping process with waste needle-leaved wood material |
| CN103410036A (en) * | 2013-08-15 | 2013-11-27 | 齐鲁工业大学 | Production method for high-yield hardwood pulp |
| CN103422380A (en) * | 2013-08-15 | 2013-12-04 | 齐鲁工业大学 | Needlebush high-yield slurrying method |
| CN110468611A (en) * | 2019-08-14 | 2019-11-19 | 岳阳林纸股份有限公司 | A kind of PRC-APMP pulping process of Eucalyptus urophylla |
| CN111139681A (en) * | 2019-12-26 | 2020-05-12 | 广西金桂浆纸业有限公司 | Chemi-mechanical pulp and manufacturing method thereof |
| CN112709088A (en) * | 2020-11-18 | 2021-04-27 | 浙江新亚伦纸业有限公司 | Production process of high-yield pulp release paper |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103088683A (en) * | 2013-02-28 | 2013-05-08 | 刘长如 | Clean pulping process with waste needle-leaved wood material |
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| CN110468611A (en) * | 2019-08-14 | 2019-11-19 | 岳阳林纸股份有限公司 | A kind of PRC-APMP pulping process of Eucalyptus urophylla |
| CN111139681A (en) * | 2019-12-26 | 2020-05-12 | 广西金桂浆纸业有限公司 | Chemi-mechanical pulp and manufacturing method thereof |
| CN112709088A (en) * | 2020-11-18 | 2021-04-27 | 浙江新亚伦纸业有限公司 | Production process of high-yield pulp release paper |
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Application publication date: 20130213 |