CN101660282A - Method for preparing all cotton stalk cellulose by adopting mechanical-active oxygen method - Google Patents
Method for preparing all cotton stalk cellulose by adopting mechanical-active oxygen method Download PDFInfo
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- CN101660282A CN101660282A CN200910018269A CN200910018269A CN101660282A CN 101660282 A CN101660282 A CN 101660282A CN 200910018269 A CN200910018269 A CN 200910018269A CN 200910018269 A CN200910018269 A CN 200910018269A CN 101660282 A CN101660282 A CN 101660282A
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000001301 oxygen Substances 0.000 title claims abstract description 60
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229920002678 cellulose Polymers 0.000 title claims abstract description 9
- 239000001913 cellulose Substances 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 26
- 238000004061 bleaching Methods 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 46
- 239000002002 slurry Substances 0.000 claims description 29
- 238000002803 maceration Methods 0.000 claims description 16
- 239000007844 bleaching agent Substances 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 102000016938 Catalase Human genes 0.000 claims description 12
- 108010053835 Catalase Proteins 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- -1 tert-butyl group alcohol peroxide Chemical group 0.000 claims description 8
- 239000012141 concentrate Substances 0.000 claims description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- 238000010009 beating Methods 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 5
- 239000004137 magnesium phosphate Substances 0.000 claims description 5
- 229960002261 magnesium phosphate Drugs 0.000 claims description 5
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 5
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 5
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 101710171243 Peroxidase 10 Proteins 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000002932 luster Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 238000004898 kneading Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 2
- 238000004821 distillation Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- 238000004537 pulping Methods 0.000 abstract 1
- 230000003213 activating effect Effects 0.000 description 9
- 229920001131 Pulp (paper) Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 239000013043 chemical agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003623 enhancer Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Chemical compound ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241001504664 Crossocheilus latius Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 241000610628 Trichoptilium incisum Species 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- BUIMWOLDCCGZKZ-UHFFFAOYSA-N n-hydroxynitramide Chemical compound ON[N+]([O-])=O BUIMWOLDCCGZKZ-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229940089401 xylon Drugs 0.000 description 1
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Abstract
The invention relates to a method for preparing all cotton stalk cellulose for construction, paper making and other applications by taking cotton stalks as raw materials and adopting a mechanical-active oxygen method. The method comprises the following steps: tearing, crushing and kneading the cotton stalks the impurities of which are removed into a velvet shape, adding impregnation liquid for pre-oxidation and stirring the mixture; grinding and defibering, grinding and concentrating the materials subjected to the grinding and defibering, simultaneously adding active oxygen defibrination bleaching liquid for bleaching; carrying out pressurizing turbulence final bleaching on high-concentration pulp subjected to grinding concentration and bleaching and preparing all cotton stalk cellulose pulp for making paper; and concentrating, filtering, dewatering or drying the all cotton stalk cellulose pulp to obtain the all cotton stalk cellulose for construction and other industries. The method has high pulp yield, effectively eliminates barky and rotten patches of the all cotton stalk cellulose, ,is free from distillation, cannot generate pulping black liquid seriously polluting the ecological environment and has the characteristics of good whiteness, obvious energy-saving effect, simple process, convenient operation, little investment, low cost and the like.
Description
One, technical field
The present invention relates to a kind of is raw material with the cotton bar, uses " machinery---active oxygen method ", produces the method for cotton rod fibers.Be raw material specifically, with the method for " machinery---active oxygen method " production building, papermaking and other purposes fiber with the cotton bar.This method is equally applicable to utilize other grass straw, reed bar, bamboo wood, shrub etc. as raw material, with the fibrous matter of production such use.
Two, background technology
Forest is the important ecological resources of the earth, and it is also undertaking the effect of absorbing carbon dioxide, release oxygen except effects such as can preventing erosion, regulate the climate.Yet the forest reserves in the world are just with annual 700 * 10 at present
8m
2Decrease of speed, the forest reserves are used to produce wood pulp papermaking, are to cause the forest reserves to add one of major reason of quick depletion; Therefore, it is very urgent to seek the renewable fibrous raw material of alternative wood pulp papermaking.
Because cotton stalk integrates bast fiber and cane wood fibre, its chemical composition is in close proximity to leaf wood material (seeing Table 1).
Table 1: cotton haulm raw material chemical composition (%) and average fiber long (mm)
Data source: " string chemistry teaching material " China Light Industry Press 2001
China produces a cotton big country, produces the high-quality cotton stalk per year more than tens million of tons, can be at present the year production-goods source utilization rate of this similar leaf wood be less than 20%, and people want to utilize this huge resource to come replacing wood to produce paper pulp fiber for many years.
Characteristics just because of cotton stalk are that bast and cane are combined into one, and stiff spot and rotten spot on its bast are not easily separated, can not produce for a long time in order to cotton rod fibers slurry papermaking, that substitute xylon paper pulp.In the last few years, be that raw material production goes out and can there is following shortcoming in order to the cotton rod fibers paper pulp of papermaking though the cotton stalk of the enterprise of only a few is arranged: 1, its complex process, the equipment that needs is many, and investment is big; 2, power consumption is high, still exists problem of environmental pollution; 3, can not produce the cotton stalk fiber paper pulp of white, that is to say can not be in order to the production of white paper.
Three, summary of the invention:
The objective of the invention is in order to solve the deficiency of above-mentioned technology: provide a kind of " machinery---active oxygen method " to produce the method for cotton rod fibers.The method that it is under a kind of mechanical enhancer effect, the chemical agent synergy is produced white cotton rod fibers slurry, its non-evaporating boiling, obvious energy conservation not only, and do not produce the black liquor of pulp making of serious pollution of ecological environment.
Technical scheme of the present invention is: the velvet shape is torn, pulverizes and rubbed into to the cotton stalk that will remove impurity, adds deployed maceration extract and carry out the pre-oxidation reaction, and stir; The reacted material of pre-oxidation is ground again and discongest, the material after grinding is discongested grinds concentrated again, adds active oxygen defibrination bleaching liquid simultaneously and bleaches; Pulp density after concentrating is 25～30%; Underflow after grinding concentrated bleaching is pressurizeed, and turbulent flow is whole to be floated, and just can produce cotton rod fibers slurry.
Its specific embodiment is as follows:
1, raw material is prepared:
The arrangement cotton stalk is removed foreign material, and cotton stalk is torn and pulverized, and rubs into velvet shape material then.
2, produce fiber:
2.1 give oxidation processes: carry out the pre-oxidation reaction with adding deployed maceration extract in the velvet material, and stir; Material is discongested, carry out pre-reaction simultaneously; The pre-oxidation reaction temperature is 70～80 ℃, and the time of pre-oxidation reaction was controlled at 40～80 minutes.
Composition in the maceration extract is by weight: the content of active oxygen A is 3～10%, the content of active oxygen B for the content of 〉=2.5 μ mol/L, active oxygen C for the 〉=content of 3umol/L, active oxygen D is 0.3～0.8%, active calcium oxide is 10～50%, sodium metasilicate is 1.5%, magnesium phosphate is 0.15%, the content of DTPA is 0.1%, all the other are water, pH value 10～11.
Wherein: active oxygen A is a hydrogen peroxide, and active oxygen B is a tert-butyl group alcohol peroxide, and active oxygen C is a catalase, and active oxygen D is the manganese catalase.
2.2 grind and to discongest processing: will give material after the oxidation processes and grind and discongest processing, the compression ratio that evenly rolls material is 〉=4: 1, the beating degree of material 〉=17%, form velvet shape fine fibre, cellulose in the separation of material cell interbed forms slightly slurry, and color and luster is by the brown yellow that becomes.
2.3 bleaching concentrates: the thick slurry that above-mentioned grinding is discongested after the processing adds active oxygen defibrination bleaching agent, bleaches, and concentrates, and forms slip.The temperature that bleaching concentrates is controlled at≤and 60 ℃; Pulp density after concentrating is controlled at 25～30%.
The addition of active oxygen defibrination bleaching agent by its weight ratio is:
Active oxygen defibrination bleaching agent: cotton stalk=(0.04～0.06): 1
The prescription of active oxygen defibrination bleaching agent by dried cotton stalk weight ratio is: hydrogen peroxide 3～6%, catalase 2.5～5 μ mol/Kg, manganese catalase 3～6 μ mol/Kg, tert-butyl group alcohol hydrogen peroxidase 10 .3～0.6%.To this moment, cotton stalk is all discongested into monfil, and head and the tail oxygen is under the invigoration effect of mill heating power, basic stripping such as lignin, and fibre whiteness reaches more than 70%.
3, float processing eventually:
It is 10～12% that the concentrated slip of producing of bleaching (activating oxide still has about 40～50% of former addition to exist in the slip of this moment) water is transferred to concentration, temperature is adjusted to 70～80 ℃, again slip is forced into 2MPa, and stirs simultaneously, the time is 30～45 minutes.Just can produce cotton rod fibers slurry.This cotton rod fibers slurry can supply paper grade (stock).Contain part residual activity oxide in the waste liquid that produces, can use for preparation maceration extract in the pre-oxidation treatment after handling a little.
When needs are used for building or other etc. during industry, with produce for the cotton rod fibers of paper grade (stock) slurry concentrate again, filter, dewater or dry just can, the waste water of generation is owing to contain the residual activating oxide of part, after handling a little, also can use for the allotment maceration extract.
The method that the present invention is under a kind of mechanical enhancer effect, the chemical agent synergy is produced white cotton rod fibers slurry, be to utilize under the invigoration effect of mechanical agitation, pressure, make activating oxide can contact, also can infiltrate stiff spot and rotten spot on the cotton stalk bast more fully with the cotton rod fibers, make its cracking and remove its look, improve the whiteness of cotton rod fibers slurry, satisfied the production needs of blank sheet of paper; Whole process of the present invention does not need boiling to save a large amount of energy; The waste water that produces contains the residual activating oxide of part, but reuse does not slightly after treatment produce the black liquor of pulp making of serious pollution of ecological environment.Therefore, the present invention has fiber recovery rate height; Eliminated stiff spot and rotten spot effectively, whiteness is good; Non-evaporating boiling, obvious energy conservation; Do not produce the black liquor of pulp making of serious pollution of ecological environment; Technology is simple, and is easy to operate, small investment, characteristics such as cost is low.
Four, the specific embodiment:
The present invention be a kind of be raw material with the cotton bar, under the mechanical enhancer effect, chemical agent synergy produces the method for white cotton rod fibers slurry, be that the velvet shape is torn, pulverizes and rubbed into to the cotton stalk of removing impurity, add deployed maceration extract and carry out the pre-oxidation reaction, and stir; The reacted material of pre-oxidation is ground again and discongest, the material after grinding is discongested grinds concentrated again, adds active oxygen defibrination bleaching liquid simultaneously and bleaches; To pressurize through the underflow after grinding concentrated bleaching, turbulent flow is whole to be floated again, and just can produce cotton rod fibers slurry.
Embodiment:
1, raw material is prepared:
The arrangement cotton stalk is removed foreign material, with shredder cotton stalk is torn and is pulverized, and rubs into velvet shape material with kneading machine then.
2, produce fiber:
2.1 give oxidation processes: the velvet material put into the oxidation reactor that gives that machinery is discongested device is housed, add deployed maceration extract and give oxidation reaction, and starting machinery discongests device, stir material is discongested; The pre-oxidation reaction temperature is 70～80 ℃, and the time of pre-oxidation reaction was controlled at 40～80 minutes.Present embodiment is 50～60 minutes.
Composition in the maceration extract is by doing cotton stalk weight ratio: the content of active oxygen A is 3～10%, the content of active oxygen B for the content of 〉=2.5 μ mol/L, active oxygen C for the 〉=content of 3umol/L, active oxygen D is 0.3～0.8%, active calcium oxide is 10～50%, sodium metasilicate is 1.5%, magnesium phosphate is 0.15%, the content of DTPA is 0.1%, all the other are water, pH value 10～11.
The optimization of maceration extract is formed by weight: the content of active oxygen A is 5～8%, the content of active oxygen B for the content of 〉=2.5～3.0% μ mol/L, active oxygen C for the content of 〉=3.0～3.5% μ mol/L, active oxygen D is 0.5～0.7%, active calcium oxide is 28～32%, sodium metasilicate is 1.5%, magnesium phosphate is 0.15%, the content of DTPA is 0.1%, all the other are water, pH value 10～11.Present embodiment is to adopt this optimization to form.
Wherein: active oxygen A is a hydrogen peroxide, and active oxygen B is a tert-butyl group alcohol peroxide, and present embodiment is a tert-butyl group alcohol hydrogen peroxide, and also available other tert-butyl group alcohol peroxide replaces, as: tert-butyl group alcohol hyponitric acid, tert-butyl group alcohol chlorine peroxide etc.; Active oxygen C is a catalase, and active oxygen D is the manganese catalase.
2.2 grind and to discongest processing: the material material that will give after the oxidation processes is sent into the hobboing cutter grinder through spiral shove device, grinds and further discongests processing, and the compression ratio that evenly rolls material is 〉=4: 1, the beating degree of material 〉=17%.Grinding is discongested and can be implemented by double helix roll-type stone roller cutter machine, and beating degree can be by adjusting the rotating speed that grinds the cutter machine and grinding the cutter gap and realize; Grind fluffer and be adjusted at 800～1200 rev/mins to rotating speed; Gap blade is adjusted into 0.3～0.6mm.After discongesting processing by grinding, material brooming rate reaches more than 99%, and the cellulose in the isolated cell interbed forms slightly slurry, and color and luster is by the brown yellow that becomes.
2.3 bleach dense mill: the thick slurry that above-mentioned grinding is discongested after the processing is sent into high-density paste mill through spiral shove device, add active oxygen defibrination bleaching agent simultaneously, bleach, and carry out high consistency refining, form slip.The bleaching underflow temperature be controlled at≤60 ℃, pulp density is controlled at 25～30%.
The addition of active oxygen defibrination bleaching agent by its weight ratio is:
Active oxygen defibrination bleaching agent: cotton stalk=(0.04～0.06): 1
The prescription of active oxygen defibrination bleaching agent by dried cotton stalk weight ratio is: hydrogen peroxide 3～5%, catalase 2.5～5 μ mol/L, manganese catalase 3～6 μ mol/L, tert-butyl group alcohol hydrogen peroxidase 10 .3～0.6%.
To this moment, cotton stalk is all discongested into monfil, and active oxygen is under the invigoration effect of mill heating power, basic stripping such as lignin, and fibre whiteness reaches more than 70%.
3, float processing eventually:
Bleaching is concentrated the slip of producing (activating oxide still has about 40～50% of former addition to exist in the slip of this moment) send into the pressure type storage tank by conveying worm, it is 10～12% that water transfers to concentration with slip, temperature is adjusted to 70～80 ℃, again slip is forced into 2MPa, and stir simultaneously (as by supercharging turbulator or compression pump etc.), the time is 30～45 minutes.Under the stirring action of machinery, remaining activating oxide fully contacts with fiber in the slip, and remaining activating oxide has further been strengthened active function under the effect of pressure, thereby can eliminate " the yellow head " of the cotton stalk pulp that other technology is difficult to remove; Simultaneously, under the effect of pressure, make active oxygen can enter residual stiff spot and rotten spot inside better, make its abundant cracked degraded.Just can produce cotton rod fibers slurry.The fibre whiteness of this moment can reach more than 76%, and this cotton rod fibers slurry can supply paper grade (stock).Contain part residual activity oxide in the waste liquid that produces, can use for preparation maceration extract in the pre-oxidation treatment after handling a little.
The cotton rod fibers slurry situation of producing is as follows:
(1) whiteness detects:
The cotton rod fibers produced slurry is put into water disperse, under swabbing action, moulding in Buchner funnel then is pressed on the filter paper and flattens, and is 80.2%ISO through air-dry back with YQ-Z-48B whiteness instrument mensuration whiteness;
(2) fibre property is measured:
Use the PFI beater, starch densely 10%, beater roll(er) and beater chamber gap are 0.2mm, and the control beating consistency is 45 ° of SR, copy to get the scraps of paper and detect (seeing Table 2) on standard paper industry former:
Table 2: fibre property detects
| Project | Measured value | Assay method |
| Breaking length | ??7.49Km | ??GB/T453-1989 |
| Tear index | ??4.84mn.m2/g | ??GB/T455.1-1989 |
| Burst index | ??5.48kpa.m2/g | ??GB/T453-1989 |
(3) slurry yield calculates:
Cotton rod fibers slurry being adjusted to 10% concentration, getting 100ml, is the plansifter screening of 0.15mm with the sieve seam, and the slag that sifts out slurry is dried to weight in 100 ℃ of baking ovens, and calculating slurry yield is 71.6%.
When needs are used for building or other etc. during industry, with produce for the cotton rod fibers of paper grade (stock) slurry concentrate again, filter, dewater or dry just can, the waste water of generation is owing to contain part residual activity oxide, after handling a little, also can use for the allotment maceration extract.
Therefore, the method that the present invention is under a kind of mechanical enhancer effect, the chemical agent synergy is produced white cotton rod fibers slurry, to utilize under the invigoration effect of mechanical agitation, pressure, make activating oxide can contact more fully with the cotton rod fibers, also can infiltrate stiff spot and rotten spot on the cotton stalk bast, make its cracking and remove its look, improve the whiteness of cotton rod fibers slurry, satisfied the need of production of blank sheet of paper; Whole process of the present invention does not need boiling to save a large amount of energy; The waste water that produces contains the residual activating oxide of part, but slightly after treatment reuse does not produce the black liquor of pulp making of serious pollution of ecological environment. Therefore, the present invention has to such an extent that fiber productivity is high; Effectively eliminated stiff spot and rotten spot, whiteness is good; Non-evaporating boiling, obvious energy conservation; Do not produce the black liquor of pulp making of serious pollution of ecological environment; Technique is simple, and is easy to operate, small investment, the characteristics such as cost is low.
Claims (2)
1, a kind of " machinery---active oxygen method " produces the method for cotton rod fibers, with the cotton stalk is raw material, it is characterized in that: the velvet shape is torn, pulverizes and rubbed into to the cotton stalk that will remove impurity, adds deployed maceration extract and carry out the pre-oxidation reaction, and stir; Again the reacted material of pre-oxidation is ground and discongest, material after grinding is discongested grinds concentrated again, add active oxygen defibrination bleaching liquid simultaneously and bleach, the underflow after grinding concentrated bleaching is pressurizeed, and turbulent flow is whole to be floated, and just can produce cotton rod fibers slurry;
Its specific embodiment is as follows:
1, raw material is prepared:
The arrangement cotton stalk is removed foreign material, and cotton stalk is torn and pulverized, and rubs into velvet shape material then;
2, produce fiber:
2.1 give oxidation processes: carry out the pre-oxidation reaction with adding deployed maceration extract in the velvet material, and stir; Material is discongested, carry out pre-reaction simultaneously; The pre-oxidation reaction temperature is 70～80 ℃, and the time of pre-oxidation reaction was controlled at 40～80 minutes;
Composition in the maceration extract is by weight: the content of active oxygen A is 3～10%, the content of active oxygen B for the content of 〉=2.5 μ mol/L, active oxygen C for the 〉=content of 3umol/L, active oxygen D is 0.3～0.8%, active calcium oxide is 10～50%, sodium metasilicate is 1.5%, magnesium phosphate is 0.15%, the content of DTPA is 0.1%, all the other are water, pH value 10～11;
Wherein: active oxygen A is a hydrogen peroxide, and active oxygen B is a tert-butyl group alcohol peroxide, and active oxygen C is a catalase, and active oxygen D is the manganese catalase;
2.2 grind and to discongest processing: will give material after the oxidation processes and grind and discongest processing, the compression ratio that evenly rolls material is 〉=4: 1, the beating degree of material 〉=17%, form velvet shape fine fibre, cellulose in the separation of material cell interbed forms slightly slurry, and color and luster is by the brown yellow that becomes;
2.3 bleaching concentrates: the thick slurry that above-mentioned grinding is discongested after the processing adds active oxygen defibrination bleaching agent, bleaches, and carries out dense mill, forms slip, the temperature of bleaching dense mill is controlled at≤and 60 ℃, the pulp density behind the dense mill is controlled at 25～30%;
The addition of active oxygen defibrination bleaching agent by its weight ratio is:
Active oxygen defibrination bleaching agent: cotton stalk=(0.04～0.06): 1
The prescription of active oxygen defibrination bleaching agent by dried cotton stalk weight ratio is: hydrogen peroxide 3～6%, catalase 2.5～5 μ mol/Kg, manganese catalase 3～6 μ mol/Kg, tert-butyl group alcohol hydrogen peroxidase 10 .3～0.6%;
3, float processing eventually:
It is 10～12% that the concentrated slip water of producing of bleaching is transferred to concentration, and temperature is adjusted to 70～80 ℃, again slip is forced into 2MPa, and stirs simultaneously, and the time is 30～45 minutes, just can produce cotton rod fibers slurry; After handling a little, to use for preparation maceration extract in the pre-oxidation treatment waste liquid that produces.
2, " machinery---active oxygen method " according to claim 1 produces the method for cotton rod fibers, it is characterized in that: the composition of described maceration extract by weight: the content of active oxygen A is 5～7%, the content of active oxygen B for the content of 〉=2.5～3.0% μ mol/L, active oxygen C for the content of 〉=3.0～3.5%umol/L, active oxygen D is 0.5～0.7%, active calcium oxide is 28～32%, sodium metasilicate is 1.5%, magnesium phosphate is 0.15%, the content of DTPA is 0.1%, all the other are water, pH value 10～11.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154870A (en) * | 2010-12-28 | 2011-08-17 | 宜宾长毅浆粕有限责任公司 | Method for preparing high-polymer pulp |
| CN103174047A (en) * | 2013-04-16 | 2013-06-26 | 枣庄鸿润纸业有限公司 | Process for refining wheat-straw pulp by hydrogen peroxide enzyme method |
| CN105568727A (en) * | 2016-02-19 | 2016-05-11 | 李跃怡 | Peroxide cellulose |
| CN109695172A (en) * | 2018-12-28 | 2019-04-30 | 江苏秸宝生物质新材料有限公司 | Straw biological mechanical pulp-making method and equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1997791B (en) * | 2004-05-03 | 2011-01-26 | 纸、纸板和纤维素工业技术中心 | Method for mechanical pulp production |
| CN1847520A (en) * | 2005-11-01 | 2006-10-18 | 张承绍 | Paper pulp preparing process by means of violent decomposition of hydrogen peroxide in the presence of excessive alkaline matter |
| CN101016702B (en) * | 2007-01-24 | 2010-04-14 | 华南理工大学 | Chemical mechanical pulping method for cotton haulm raw material |
| CN101109162A (en) * | 2007-07-30 | 2008-01-23 | 北京亿同多欧纸业投资有限公司 | Cotton stalk bleach pulp with disinfection function and method of manufacturing the same |
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2009
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154870A (en) * | 2010-12-28 | 2011-08-17 | 宜宾长毅浆粕有限责任公司 | Method for preparing high-polymer pulp |
| CN102154870B (en) * | 2010-12-28 | 2012-09-05 | 宜宾长毅浆粕有限责任公司 | Method for preparing high-polymer pulp |
| CN103174047A (en) * | 2013-04-16 | 2013-06-26 | 枣庄鸿润纸业有限公司 | Process for refining wheat-straw pulp by hydrogen peroxide enzyme method |
| CN105568727A (en) * | 2016-02-19 | 2016-05-11 | 李跃怡 | Peroxide cellulose |
| CN109695172A (en) * | 2018-12-28 | 2019-04-30 | 江苏秸宝生物质新材料有限公司 | Straw biological mechanical pulp-making method and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101660282B (en) | 2014-11-05 |
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