CN106120432A - Utilize the method that corn leafage one kettle way manufactures paper pulp - Google Patents
Utilize the method that corn leafage one kettle way manufactures paper pulp Download PDFInfo
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- CN106120432A CN106120432A CN201610495117.0A CN201610495117A CN106120432A CN 106120432 A CN106120432 A CN 106120432A CN 201610495117 A CN201610495117 A CN 201610495117A CN 106120432 A CN106120432 A CN 106120432A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- 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
- D21C3/00—Pulping cellulose-containing materials
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- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
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Abstract
The invention discloses a kind of method utilizing corn leafage one kettle way to manufacture paper pulp, it is characterised in that by broken for the fresh corn bud corium farinosum thread fine fibre for length less than 1cm；Corn leafage after pulverizing is placed in reactor by the biological laccase solution just submergence that concentration is 10 20g/L, and 50 60 DEG C keep 20 24 hours；Adding volume is the H of material cumulative volume 10 20% in reactor2O2, quality be the MgSO of material gross mass 0.3 0.5% in reactor4And the Na of 3.0 5.0%2SiO3, regulate pH to 9 10, keep system pH constant at 90 100 DEG C boiling and bleaching to corn leafage white floss pulpous state；Cooled and filtered is rinsed, and drying is to corn leafage white paper pulp.The present invention uses " one kettle way " steaming and decocting to be carried out with bleaching simultaneously, and technique is simple simultaneously without middle pollution products, and initial stage melting process is only pulverized, and without waste water generation, whole process costs is low and environmental friendliness.
Description
Technical field
The present invention relates to pulp technology for making paper, in particular to a kind of method utilizing corn leafage one kettle way to manufacture paper pulp.
Background technology
Agriculture and forestry organic waste material corn leafage, also referred to as bracteal leaf of corn, be to be coated part outside corn ear, its content of cellulose
High, organizational structure tight, fibrous fraction is high and waxiness thickness, is difficult to macerate rotten, also affect crops root system development behind field, and affect
Cultivating, so being not suitable for cropland application, therefore major part corn leafage is simply discarded or on-site incineration, and this not only causes money
The serious waste in source, also result in a certain degree of environmental pollution.
With expanding economy, China's increasing environmental pollution in recent years, particularly take place frequently air " haze ", has had a strong impact on people
Life and health, so country forbids the agro-ecology garbages such as crop straw burning, therefore seek comprehensive close friend and utilize these
Garbage has become the task of top priority.
Research shows that corn leafage fibre morphology is similar with wheat straw, and its length, intensity are preferable, but fragility and contractility are relatively
Height, if paper pulp papermaking can be used successfully to, then can be greatly increased the added value of itself, also can alleviate China to a certain extent
The problem of paper-making fibre shortage of resources.Traditional paper-making process when utilizing wood fibre will through getting the raw materials ready, steaming and decocting, condensation, pulp washing,
The complicated procedures of forming such as bleaching, wherein produce a large amount of high-concentration waste water, and therefore papermaking is a high pollution industry, if one can be developed
Corn leafage manufactures the environment protection method of paper pulp, then will create good economy, environment, economy of resources.
Summary of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, it is provided that a kind of technique is simple, pollute little, cost
Method that corn leafage one kettle way manufactures paper pulp that what low, pulp brightness was high utilize.
The technical scheme is that a kind of method utilizing corn leafage one kettle way to manufacture paper pulp, it is characterised in that will
The broken thread fine fibre for length less than 1cm of fresh corn bud corium farinosum；Corn leafage after pulverizing is placed in reactor dense
Degree is the biological laccase solution just submergence of 10-20g/L, and 50-60 DEG C keeps 20-24 hour；Adding volume is thing in reactor
The H of material cumulative volume 10-20%2O2, quality be the MgSO of material gross mass 0.3-0.5% in reactor4And 3.0-5.0%
Na2SiO3, regulate pH to 9-10, keep system pH constant at 90-100 DEG C boiling and bleaching to corn leafage white floss pulpous state；
Cooled and filtered is rinsed, and drying is to corn leafage white paper pulp.
Preferably, step is:
A. fresh corn bud skin is cut into segment, put into pulverizer pulverize 10-20S obtain length less than 1cm thread carefully
Fiber；
B. the corn leafage after pulverizing is laid in reactor, and adding concentration is that 10-20g/L biology laccase solution is to beautiful
Rice bud skin is just completely submerged, and keeps 20-24 hour at 50-60 DEG C；
C. adding volume in reactor is the H of material cumulative volume 10-20% in reactor2O2It is anti-as bleach, quality
Answer the MgSO of material gross mass 0.3-0.5% in device4And quality is the Na of material gross mass 3.0-5.0% in reactor2SiO3
As stabilizer, regulate pH to 9-10 with sodium hydroxide, keep that system pH is constant carries out boiling and bleaching 2-3h at 90-100 DEG C,
Until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
Further, with interval addition sodium hydroxide holding during boiling and bleaching after sodium hydroxide regulation pH to 9.5
System pH is constant.
Further, H is added2O2Volume is material cumulative volume 15-20%, MgSO in reactor4Quality is thing in reactor
Material gross mass 0.4-0.5% and Na2SiO3Quality is material gross mass 4.0-5.0% in reactor.
Preferably, the filtrate that cooled and filtered obtains, manufacture the bleaching liquid in pulping process for next time.
Further, when filtrate is as the bleaching liquid manufactured next time in paper pulp, it is less than 1cm silk by the most size-reduced for length
The fresh corn bud skin of shape fine fibre is placed in reactor and is bleached liquid just submergence, and 50-60 DEG C keeps 20-24 hour；Regulation
PH to 9-10, keep system pH constant at 90-100 DEG C boiling and bleaching 3-4h to corn leafage white floss pulpous state；After cooling
Filtration and washing, drying is to corn leafage white paper pulp.
The invention have the benefit that
1. in paper pulp fabrication process, total chlorine free bleaching has become as the inexorable trend of bleaching development.H2O2Bleaching is because having drift
The advantages such as white low cost, pollution are less, bleached pulp cleanliness factor is high, retention of whiteness is good, decrease the discharge of waste water.At pulping and paper-making
The biological laccase of middle application high selective feature in terms of oxidative degradation lignin carries out pretreatment, it is possible to contribute to follow-up drift
In vain.
In the most existing paper technology, steaming and decocting is separate operation with bleaching, and steaming and decocting is to be converted into by plant fiber material
Paper pulp, bleaching is that oxidative bleaches is destroyed lignin and the structure of coloring matter thus improves and be worth purity and whiteness, the two
All can produce high-concentration waste water, and the present invention uses " one kettle way " steaming and decocting and bleaching to be carried out simultaneously, the simple nothing simultaneously of technique
Middle pollution products, bleach filtrate can also recycle, and initial stage melting process is only pulverized, and produces without waste water,
Whole process costs is low and environmental friendliness.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 10S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 20g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 24 hours at 60 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 10%2O2It is the MgSO of material gross mass 0.3% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 3.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=9.5), now corn leafage is yellow, carries out boiling and bleaching 2h, during boiling and bleaching reaction discontinuously at 100 DEG C
Adding NaOH in reactor, making reaction environment be maintained at pH is 9.5, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 73.4% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 2
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 15S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 10g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 20 hours at 50 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 12%2O2It is the MgSO of material gross mass 0.4% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 4.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=9), now corn leafage is yellow, carries out boiling and bleaching 2.5h at 95 DEG C, during boiling and bleaching reaction discontinuously to
Adding NaOH in reactor, making reaction environment be maintained at pH is 9, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 70.1% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 3
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 20S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 12g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 21 hours at 55 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 15%2O2It is the MgSO of material gross mass 0.5% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 5.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=10), now corn leafage is yellow, carries out boiling and bleaching 3h at 90 DEG C, during boiling and bleaching reaction discontinuously to
Adding NaOH in reactor, making reaction environment be maintained at pH is 10, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 69.3% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 4
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 10S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 16g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 22 hours at 52 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 20%2O2It is the MgSO of material gross mass 0.35% in reactor as bleach, quality4And quality is
The Na of material gross mass 3.5% in reactor2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (this enforcement
The preferred pH=9.8 of example), now corn leafage is yellow, carries out boiling and bleaching 2h, be interrupted during boiling and bleaching reaction at 100 DEG C
Ground adds NaOH in reactor, and making reaction environment be maintained at pH is 9.8, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 74.5% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 5
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 16S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 15g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 20 hours at 58 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 10%2O2It is the MgSO of material gross mass 0.45% in reactor as bleach, quality4And quality is
The Na of material gross mass 4.5% in reactor2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (this enforcement
The preferred pH=9 of example), now corn leafage is yellow, carries out boiling and bleaching 2.5h, during boiling and bleaching reaction discontinuously at 92 DEG C
Adding NaOH in reactor, making reaction environment be maintained at pH is 9, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 68.4% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 6
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 20S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 20g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 24 hours at 60 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 18%2O2It is the MgSO of material gross mass 0.3% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 5.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=10), now corn leafage is yellow, carries out boiling and bleaching 3h at 90 DEG C, during boiling and bleaching reaction discontinuously to
Adding NaOH in reactor, making reaction environment be maintained at pH is 10, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 75.3% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 7
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 12S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 10g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 23 hours at 55 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 20%2O2It is the MgSO of material gross mass 0.4% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 3.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=9.2), now corn leafage is yellow, carries out boiling and bleaching 2h at 94 DEG C, during boiling and bleaching reaction discontinuously to
Adding NaOH in reactor, making reaction environment be maintained at pH is 9.2, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 88.1% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 8
As it is shown in figure 1, the present invention utilizes the method that corn leafage one kettle way manufactures paper pulp, step is:
A. the fresh green corn bud skin not air-dried is cut into length 3-5cm segment, puts into pulverizer and pulverize 18S, obtain
The length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor that (reactor that the present invention uses is all types of flat adds
The container of heat), adding concentration in reactor is that 15g/L biology laccase aqueous solution is just completely submerged to corn leafage,
System keeps 22 hours at 50 DEG C；
C. adding volume in reactor is (i.e. biological laccase aqueous solution and the Semen Maydis bud being immersed of material in reactor
Skin) H of cumulative volume 15%2O2It is the MgSO of material gross mass 0.5% in reactor as bleach, quality4And quality is anti-
Answer the Na of material gross mass 4.0% in device2SiO3As stabilizer, add solid NaOH regulation system pH to 9-10 (the present embodiment
Preferably pH=9.5), now corn leafage is yellow, carries out boiling and bleaching 3h, during boiling and bleaching reaction discontinuously at 100 DEG C
Adding NaOH in reactor, making reaction environment be maintained at pH is 9.5, until corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is white to corn leafage
Coloured paper is starched.
It is 77.4% that detection obtains the pulp brightness of corn leafage white paper pulp.
When the filtrate that cooled and filtered in step d obtains manufactures the bleaching liquid of paper pulp as next time:
Embodiment 9
Using the filtrate of step d in embodiment 1 as the present embodiment bleaching liquid
It is laid in the most size-reduced in reactor less than the fresh corn bud skin of the thread fine fibre of 1cm for length, is bleached
Liquid just submergence, 50 DEG C keep 20 hours, add sodium hydroxide regulation pH to 9, at 90 DEG C boiling and bleaching 3h to corn leafage in
White floss pulpous state, during boiling and bleaching, interval adds sodium hydroxide and keeps system pH=9；Filter through 100 mesh after cooling and be sieved through
Filter, rinses 3-5 time with clear water；At 105 DEG C, drying is to corn leafage white paper pulp.
It is 61.6% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 10
Using the filtrate of step d in embodiment 3 as the present embodiment bleaching liquid
It is laid in the most size-reduced in reactor less than the fresh corn bud skin of the thread fine fibre of 1cm for length, is bleached
Liquid just submergence, 60 DEG C keep 24 hours, add sodium hydroxide regulation pH to 10, and at 100 DEG C, boiling and bleaching 3.5h is to Semen Maydis bud
Skin white floss pulpous state, during boiling and bleaching, interval adds sodium hydroxide and keeps system pH=10；Filter through 100 mesh after cooling
It is sieved through filter, rinses 3-5 time with clear water；At 105 DEG C, drying is to corn leafage white paper pulp.
It is 58.3% that detection obtains the pulp brightness of corn leafage white paper pulp.
Embodiment 11
Using the filtrate of step d in embodiment 5 as the present embodiment bleaching liquid
It is laid in the most size-reduced in reactor less than the fresh corn bud skin of the thread fine fibre of 1cm for length, is bleached
Liquid just submergence, 55 DEG C keep 22 hours, add sodium hydroxide regulation pH to 9.5, and at 95 DEG C, boiling and bleaching 4h is to corn leafage
White floss pulpous state, during boiling and bleaching, interval adds sodium hydroxide and keeps system pH=9.5；Filter through 100 mesh after cooling
It is sieved through filter, rinses 3-5 time with clear water；At 105 DEG C, drying is to corn leafage white paper pulp.
It is 60.1% that detection obtains the pulp brightness of corn leafage white paper pulp.
Claims (6)
1. one kind utilizes the method that corn leafage one kettle way manufactures paper pulp, it is characterised in that by broken for fresh corn bud corium farinosum for long
The degree thread fine fibre less than 1cm；It is that the biological of 10-20g/L paints that corn leafage after pulverizing is placed in reactor by concentration
Enzymatic solution just submergence, 50-60 DEG C keeps 20-24 hour；Adding volume is the H of material cumulative volume 10-20% in reactor2O2、
Quality is the MgSO of material gross mass 0.3-0.5% in reactor4And the Na of 3.0-5.0%2SiO3, regulate pH to 9-10, protect
System pH of holding constant at 90-100 DEG C boiling and bleaching to corn leafage white floss pulpous state；Cooled and filtered is rinsed, and dries i.e.
Obtain corn leafage white paper pulp.
2. the method for claim 1, it is characterised in that step is:
A. fresh corn bud skin is cut into segment, puts into pulverizer pulverizing 10-20S and obtain the length thread fine fibre less than 1cm；
B. the corn leafage after pulverizing is laid in reactor, and adding concentration is that 10-20g/L biology laccase solution is to Semen Maydis bud
Skin is just completely submerged, and keeps 20-24 hour at 50-60 DEG C；
C. adding volume in reactor is the H of material cumulative volume 10-20% in reactor2O2It is reactor as bleach, quality
The MgSO of middle material gross mass 0.3-0.5%4And quality is the Na of material gross mass 3.0-5.0% in reactor2SiO3As
Stabilizer, regulates pH to 9-10 with sodium hydroxide, keeps that system pH is constant carries out boiling and bleaching 2-3h at 90-100 DEG C, until
Corn leafage white floss pulpous state；
D. filtering through 100 mesh sieves after cooling, rinse 3-5 time with clear water, at 105 DEG C, drying is to corn leafage white paper
Slurry.
3. method as claimed in claim 1 or 2, it is characterised in that with after sodium hydroxide regulation pH to 9.5 in boiling and bleaching mistake
In journey, interval addition sodium hydroxide keeps system pH constant.
4. method as claimed in claim 1 or 2, it is characterised in that add H2O2Volume is material cumulative volume 15-in reactor
20%, MgSO4Quality is material gross mass 0.4-0.5% and Na in reactor2SiO3Quality is material gross mass in reactor
4.0-5.0%.
5. method as claimed in claim 1 or 2, it is characterised in that the filtrate that cooled and filtered obtains, manufactures paper for next time
Bleaching liquid during slurry.
6. method as claimed in claim 5, it is characterised in that when filtrate is as the bleaching liquid manufactured next time in paper pulp, will
The most size-reduced being placed in reactor less than the fresh corn bud skin of the thread fine fibre of 1cm for length is bleached liquid just submergence, 50-
60 DEG C keep 20-24 hour；Regulation pH to 9-10, keep system pH constant at 90-100 DEG C boiling and bleaching 3-4h to Semen Maydis bud
Skin white floss pulpous state；Cooled and filtered is rinsed, and drying is to corn leafage white paper pulp.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106667351A (en) * | 2016-12-30 | 2017-05-17 | 重庆锄商贸有限公司 | Environment-friendly toilet paper and method for processing same |
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