CN101748633A - Novel cellulose extraction process - Google Patents
Novel cellulose extraction process Download PDFInfo
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- CN101748633A CN101748633A CN200810240326A CN200810240326A CN101748633A CN 101748633 A CN101748633 A CN 101748633A CN 200810240326 A CN200810240326 A CN 200810240326A CN 200810240326 A CN200810240326 A CN 200810240326A CN 101748633 A CN101748633 A CN 101748633A
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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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
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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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
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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
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
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Abstract
The invention relates to a novel sectional type process which extracts cellulose from plant bodies, and comprises the following steps: the process is that dilute alkali is first used for soaking the plant bodies, and then pressurizing, steaming, polishing and pulp washing are carried out so that the cellulose is obtained. The sectional type process has the advantages that very dilute alkali can be used for soaking or evaporating the plant bodies, not only the amount of alkali is greatly saved, but also the heating temperature is reduced, the heating time is shortened, the cellulose can be obtained at yield coefficient, and the secondary pollution brought by using sulfide, anthraquinone and other high pollution auxiliary agents is avoided. The soak solution and the cleaning solution can be used together in a cycling way, so liquid or solid organic fertilizer with high concentration can be conveniently obtained.
Description
Technical field
The present invention relates to a kind of cellulosic new technology of extraction from plant material of sectional type, its flow process is to soak plant material with diluted alkaline earlier, the decatize of pressurizeing again or boiling, and polishing, pulp washing obtain cellulose at last.
Background technology
At present, cellulosic most important purposes is papermaking, also may extensive use in other field.Paper is the necessity in the national product life.Statistics shows, the consumption figure of China's paper and Board was by 2,430 ten thousand tons of 5,440 ten thousand tons of being increased to 2004 in 1994, and the ratio that accounts for world's aggregate consumption brings up to 13.2% by 9.1%.China's paper and Board total quantity consumed was 6,600 ten thousand tons in 2006, and 3,216 ten thousand tons of annual growths 11.3% of import volume occupy the second place of the world, are only second to the U.S., still present growth in recent years.
When cellulosic extraction cost significantly reduced, cellulosic Another application field---hydrolysis synthesis of glucose was fermented into alcohol again and has a high potential as raw material and vehicle fuel.Therefore, invention is low-cost, the cellulose extractive technique of high yield, is conceived to the full price development and use of plant, has huge social benefit, economic benefit and environmental benefit.
Soda processes or sulfate process are the cellulose extracting methods that present paper industry generally adopts, caustic soda is as a kind of indispensable industrial chemicals in the cellulose leaching process, in timber (or non-timber) material cooking process is the important composition composition of cooking liquor, play removing lignin, make the core material of papermaking---the important function that cellulose is separated from timber (or non-timber) raw material.In timber (or non-timber) digestion process, the concentration of caustic soda is about 10%～20%, not only consumes alkali in sulfate process in a large number, and has added the sulfide of a great deal of, auxiliary agents such as anthraquinone.The cellulose yield is low, of poor quality, " three wastes " are serious, causes that the post processing investment is big, cost is high, energy consumption is high.
Existing non-wood material paper technology, alpine rush cellulose extraction process for example is to take with the alkali of 10% left and right sides concentration and the mixed liquor of sulfide, under liquor ratio is 1: 2.4 condition, boosting to 0.500MPa (about 150 ℃ of temperature) boiling carries out defibrination again, floats to starch and slightly starched about 4 hours, common raw material with 2～3 tons just can obtain 1 ton of cellulose slurry, always rolls over hundred alkali consumptions and is about 0.67～0.9 ton.
With timber is in the paper technology of raw material, and industrial chemicals generally accounts for 20～30% of its cost of material, and caustic soda is that prime cost constitutes; And be that alkali accounts for 40～50% of its cost in the paper technology of raw material with non-timber such as straws.The use of a large amount of alkali has not only increased the cost of papermaking, and causes a large amount of black liquids to be difficult to recycling.
At the deficiencies in the prior art, the present inventor has carried out intensive research.Found through experiments, cause the considerable damage of effective ingredients such as existing paper pulp extraction process consumption of raw materials is big, the cellulose recovery rate is low, of poor quality, the big main reason of fluctuation is base excess and long-time thermophilic digestion is caused cellulose, lignin.Therefore, how effectively to reduce alkali charge, avoid using contaminative auxiliary agents such as sulfide, and high yield obtains the main direction that cellulose is for we.
We find, earlier soak plant with diluted alkaline, the decatize of pressurizeing again or boiling, polishing, pulp washing extract cellulosic technology at last, can be with the extraction cellulose of former technology about 2/3 even the lower high yield of caustic soda amount (can not use sulfide), decatize or stewing temperature and time can shorten greatly.Technology of the present invention not only can reduce the alkali number and the water yield, reduces the concentrated link of highly energy-consuming, and can economy extract lignin easily.Black liquor can neutralize with small amount of acid, and the vegetation growth state of irrigating with this neutralizer is good, proves that it may use as fertilizer fully, so formed the present invention.
Summary of the invention
The invention provides a kind of cellulosic new technology of extraction from plant material of sectional type, this technology comprises the steps: plant material is soaked with the diluted alkaline amount of submergence plant, the decatize of pressurizeing again or boiling, and polishing, pulp washing obtain cellulose at last.
The present inventor found through experiments, and causes the considerable damage of effective ingredients such as existing paper pulp extraction process consumption of raw materials is big, the cellulose recovery rate is low, of poor quality, the big main reason of fluctuation is base excess and long-time thermophilic digestion is caused cellulose, lignin.Therefore, how effectively to reduce alkali charge, avoid using contaminative auxiliary agents such as sulfide, and high yield to obtain cellulose be the main direction that we study.
By experimental exploring repeatedly and our are analysed in depth and studied to existing paper technology find, existing paper technology is taked denseer aqueous slkali and the direct steaming mixed mode defibre element of paper making raw material, cause alkali lye and paper making raw material evenly to mix easily, cause raw material surface drawn game portion alkali lye overrich, alkali lye is not fully infiltration and diffusion as yet, system is just heated rapidly by high temperature, make cellulose, lignin and other organic component are destroyed in a large number, cause raw material to decompose not exclusively, cause the alkaline consumption material consumption higher, black liquor increases, and cellulose is inhomogeneous, yield is low.
A rational technical thought is to take elder generation to make its fully wetting and infiltration with the alkali immersion raw material of low concentration, when reaching the minimum alkali charge of even absorption raw material decomposition, leach and be transferred to raw material in the steam copper, under the non-poach condition, the live (open) steam heating, just can better realize even mass-and heat-transfer, farthest reduce alkali number, keep the alkali concn and all once in the raw material, avoid the destruction of excess base to raw material, this Thinker perplexs the paper industry development problem for a long time for solution and has pointed out a new direction.
According to above-mentioned Thinker, present inventors pass through experimental exploring and condition optimizing repeatedly, finally in non-wood type paper making raw material, found the optimum process condition of realizing above-mentioned Thinker, process optimization to timber is also obtained effect, thereby fine and comprehensively solved the many difficult problems that perplex paper industry for a long time.
The inventive method can adopt following specific embodiments:
1. one kind is that raw material extracts cellulosic technology with non-timber, and it comprises the steps:
The concentration of raw material soaking in 2-～10 times weight is lower than in the diluted alkaline of 10w/v%, preferably soaks at normal temperatures, leach afterwards, leach thing pressurization decatize, take out then, polishing, pulp washing, leach, promptly obtain crude fibre.Soaking the filter liquor recycled handles in the next group raw material soaking.Polishing places water or preceding batch of pulp washing black liquor, and polishing pulp washing filter liquor reaches certain density rinsing black liquor can extract lignin through neutralization, and remaining liquid can be used as liquid fertilizer or makes solid-state fertilizer.
In preferred specific embodiments, technology of the present invention comprises the steps:
With raw material soaking in 2-～10 times weight, the concentration that is preferably 5-8 times of weight is 0.5-10w/v%, be preferably in the diluted alkaline of 1-5w/v%, for example soaking 2～48 hours under the normal temperature, preferred 4～40 hours, during immersion, if increase stirring operation, can obviously shorten soak time about 2～10 hours, and leach afterwards, leach thing pressurization decatize, steam temperature is 100 ℃～170 ℃, be preferably 100-130 ℃, pressure is 0.1～0.8MPa, is preferably 0.1～0.3Mpa, decatize heat time heating time is 0.5～7 hour, be preferably 0.5～3 hour, taking-up places water or preceding batch of rinsing black liquor to polish then, clean, promptly obtain crude fibre.
In the preferred specific embodiments, technology of the present invention comprises the steps:
Is in the diluted alkaline of 1-5w/v% with raw material soaking in the concentration of 5-8 times of weight, soaked at normal temperatures 4～40 hours, leach afterwards, leach thing pressurization decatize, steam temperature is 100-130 ℃, and pressure is 0.1～0.3Mpa, and decatize heat time heating time is 0.5～3 hour, taking-up places water or preceding batch of rinsing black liquor to polish, clean then, promptly obtains crude fibre.
It is that raw material extracts cellulosic technology with timber or bamboo that the present invention also provides a kind of.
2. one kind is that raw material extracts cellulosic technology with timber or bamboo, and it comprises the steps:
Timber or bamboo raw material soaking are lower than in the diluted alkaline of 10w/v% in the concentration of 2-～10 times weight, preferably soak at normal temperatures, take out timber or bamboo pressure cooking, taking out timber or bamboo afterwards places water or preceding batch of rinsing black liquor to polish, pulp washing leaches, and promptly obtains crude fibre.The cooking liquor recycled is handled in the next group raw material soaking, and polishing pulp washing filter liquor reaches certain density rinsing black liquor can extract lignin through neutralization, and remaining liquid can be used as liquid fertilizer or makes solid-state fertilizer.Also the timber after the boiling can be polished in cooking liquor.
In preferred specific embodiments, technology of the present invention comprises the steps:
With timber or bamboo raw material soaking in 2-～10 times weight, the concentration that is preferably 5-8 times of weight is 0.5-10w/v%, be preferably in the diluted alkaline of 1-5w/v%, for example soaking 2～48 hours under the normal temperature, preferred 4～40 hours, take out timber or bamboo, pressure cooking, boiling temperature is 100 ℃～170 ℃, be preferably 100-130 ℃, pressure is 0.1～0.8MPa, is preferably 0.1～0.3Mpa, decatize heat time heating time is 0.5～7 hour, be preferably 0.5～3 hour, take out timber or bamboo then, the cooking liquor recycled is handled in the next group raw material soaking, timber after the boiling or bamboo place water or preceding batch of rinsing black liquor to polish, clean, promptly obtain crude fibre.
In the preferred specific embodiments, technology of the present invention comprises the steps:
Is in the diluted alkaline of 1-5w/v% with timber or bamboo raw material soaking in the concentration of 5-8 times of weight, soaked at normal temperatures 4～40 hours, take out timber or bamboo, pressure cooking, boiling temperature is 100-130 ℃, pressure is 0.1～0.3Mpa, boiling heat time heating time is 0.5～3 hour, takes out timber or bamboo then, and the cooking liquor recycled is handled in the next group raw material soaking, timber after the boiling or bamboo place water or preceding batch of rinsing black liquor to polish, clean, and promptly obtain crude fibre.
In the present invention, the diluted alkaline amount is good with submergence plant material just, excessively also is fine, but can increases production cost like this.
When soak that leaches in the technology of the present invention or cooking liquor cover are used for the processing of next group raw material soaking, add water and/or alkali as required to required.
When technology of the present invention is used for paper technology, the liquor ratio that is used for paper making raw material (timber or non-timber) and diluted alkaline is good (for example being about 1: 2～1: 10) with submergence just, also can adopt circulation to spray the mode (liquor ratio can reduce) of soaking pouring according to practice in factory; According to the difference of paper making raw material, the concentration of alkali can be 0.5%～10%, and preferred 1%～5%; According to the difference of paper making raw material, the time of immersion is 2～48 hours, preferred 4～40 hours (during immersion, if increase stirring operation, can obviously shorten soak time about 4～10 hours); According to the paper making raw material difference, decatize or boiling temperature are 100 ℃～170 ℃, and pressure is 0.1～0.8MPa, decatize or boiling heat time heating time are 0.5～7 hour, the preferred temperature of decatize or boiling can be 100 ℃～130 ℃, and preferred pressure is 0.1～0.3MPa, and the preferred time is 0.5～3 hour.When carrying out papermaking, the raw material after decatize or the boiling is polished, pulp washing, bleaching, is pulled an oar, copies operations such as paper moulding by papermaking routine operation process.
The employed raw material of this method can be wood raw material such as timber or bamboo, and non-wood material is bamboo for example, agricultural crop straws such as straw such as wheat, paddy rice, corn, soybean, Chinese sorghum, cotton, and all can be used for the non-wood material of papermaking Chinese alpine rushs etc.Preferably wheat stalk, rice straw, soybean stalk, bamboo and Chinese alpine rush.
Bamboo is applicable to two kinds of methods, but preferably adopts non-wood material technology.
Experiment confirm, and as seen by the embodiment that hereinafter provides, with non-wood material (comprising bamboo) with about 1%～5% liquid caustic soda for example after through 2 to 40 hours immersion, filter, leach in the pressure cooker of thing about 0.2Mpa decatize and take out after 1～3 hour, polish, pulp washing, leach, obtain the high quality fibers element, its yield can reach about 50%, and cellulosic recovery rate is more than 90%.Filter liquor cover capable of circulation is used for the next group raw material soaking to be handled.
With timber or bamboo raw material with about 1%～5% liquid caustic soda for example after through 2 to 40 hours immersion, boiling was taken out after 1～3 hour in the pressure cooker about 0.2Mpa, polish, pulp washing, filter, the filter liquor recycled is handled in the next group raw material soaking, and leaching thing is crude fibre, its yield can reach about 50%, and cellulosic recovery rate is more than 90%.The cooking liquor recycled is handled in the next group raw material soaking.
Experiment confirm, by the recycling to soak, cellulosic alkali consumption per ton only is about 1/2 of existing technology, and does not use paper making additives such as sulfide and anthraquinone.The preprocess method that diluted alkaline soaks can make alkali lye fully permeate and is spread in the raw material, and the paper making raw material after decatize or the boiling is easy to add water polishing pulping.Because what take is the mode defibre element of decatize raw material, so soak can repeatedly utilize after mending alkali fully.The making beating rinsing liquid also can be applied mechanically to higher concentration repeatedly.Solved well thus in original paper industry that black liquor can not be applied mechanically, water consumption is big, a large amount of reluctant technical barrier of black liquor, and rinsing liquid is of light color, the processing procedure smell is little.Black liquor cooling and can neutralize directly as fertilizer with the acid of less amount is re-used as the fertilizer use after also can extracting lignin, can not produce stench.Black liquor after the neutralization is directly as the nutrient solution of soilless culture and the irrigation liquid of earth culture experiment, plant and aquatic organism well-grown, under the kindred circumstances in the existing black liquid and after but be difficult to make the plant survival, the technology black liquor of the present invention that the proof alkali consumption greatly reduces and do not add sulfide is good nutriment, may be developed as plant full-valence nutrition liquor or solid organic fertilizer fully, avoid burn generating materials such as great amount of carbon dioxide, nitrogen oxide, two Malignant English, reduced the waste of the precious resources such as organophosphor, organic nitrogen, potassium and the energy.
In sum, adopt the inventive method papermaking, not only can reduce the alkali cost of investment and papermaking greatly, can also significantly improve the cellulose yield, the gained waste liquid can be used as fertilizer and returns plants such as imposing on crops and paper making raw material and promote its growth, reaches energy-saving and cost-reducing, cleaner production, the purpose that the plant full price is utilized, can form good agro-industryization, the ecological industry recycling economy pattern of industrial chemurgy.The paper that makes with technology of the present invention, the ratio of performance to price obviously is better than prior art, 1 ton of paper pulp of every production can reduce cost about 1000 yuan, black liquid extraction is worth behind the very high lignin can also as fertilizer sources, not only reduce the significant cost of handling black liquor, and promoted reasonable resources and recycle, can therefrom obtain better income, so its economy, society, ecological benefits are inestimable.
The advantage of this sectional type process is to soak or the boiling plant with very rare alkali, not only can save alkali number greatly, reduce heating-up temperature, shorten heat time heating time, high yield obtains cellulose, and has avoided the secondary pollution of using sulfide, the contour contaminative auxiliary agent of anthraquinone to be brought.Soak, cleaning solution can recycleds, and then the liquid state or the solid organic fertilizer of easy acquisition high concentration.And smell is little in whole fiber extraction and the mother liquor processing procedure, and energy consumption is low, and water consumption is few, environmental friendliness.This technology of the present invention has the characteristics of small investment, instant effect, energy-efficient, clean environment firendly, has extensively huge application value, for the full price of living beings has been opened up a new way that the value utilized is arranged most.
The specific embodiment
The present invention can be further described with indefiniteness embodiment hereinafter.
Reference examples 1
The 40g solid caustic soda is dissolved in the 700 gram water, adds 300g Chinese alpine rush (moisture 10.2%), add in the digester, airtight, the heat temperature raising boiling.Be warming up to 80 ℃ by room temperature, time 1h; Be warming up to 130 ℃, time 2h by 80 ℃; 130 ℃ of insulation 1.5h; Be warming up to 168 ℃, time 1h by 130 ℃; 168 ℃ of insulation 2h.Boiling finishes back cooling pressure release, discharging, and the boiling feed liquid is pulled an oar after removing black liquor, pulp washing, filtration, dries to constant weight under 105 ℃, obtains the 135g crude fibre, and the cellulose yield is 45%.
Embodiment 1 (Chinese alpine rush slurrying)
Soak after 6 hours with 300g Chinese alpine rush (moisture 10.2%), in 3000ml 1.0%NaOH solution and to leach, putting into beaker places pressure cooker at 0.2MPa again, decatize is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 2 hours, under 105 ℃, dry to constant weight, obtain the 144g crude fibre, the cellulose yield is 48%, and cellulosic recovery rate is more than 95%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Paper performance is as follows: tensile index 38.86N.m/g, tear index 15.77mN.m
2/ g, burst index 4.03kPa * m
2/ g, folding strength 49 times.
Embodiment 2 (Chinese alpine rush slurrying)
With 300g Chinese alpine rush (moisture 10.2%), alkali is mended in the about 2500ml of soak last among the embodiment 1 (however, residual base content is about 0.65%) moisturizing soaked to the 3000ml 1.0%NaOH solution and leach after 6 hours, put into container and be placed on pressure cooker at 0.2MPa, decatize is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 2 hours, under 105 ℃, dry to constant weight, obtain the 149.4g crude fibre, the cellulose yield is 49.8%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Paper performance is as follows: tensile index 37.86N.m/g, tear index 14.77mN.m
2/ g, burst index 3.93kPa * m
2/ g, folding strength 47 times.
Embodiment 3 (Chinese alpine rush slurrying)
With 300g Chinese alpine rush (moisture 10.2%), alkali is mended in the about 2500ml of soak last among the embodiment 2 (however, residual base content is about 0.6%) moisturizing soaked to the 3000ml 1.0%NaOH solution and leach after 4 hours, putting into beaker places pressure cooker at 0.2MPa again, decatize is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 2 hours, (needing 10 hours approximately) dries to constant weight under 105 ℃, obtain the 143g crude fibre, the cellulose yield is 48%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Paper performance is as follows: tensile index 37.66N.m/g, tear index 14.57mN.m
2/ g, burst index 3.73kPa * m
2/ g, folding strength 46 times.
Embodiment 4 (Chinese alpine rush slurrying)
With 300g Chinese alpine rush (moisture 10.2%), alkali is mended in the about 2500ml of soak last among the embodiment 3 (however, residual base content is about 0.63%) moisturizing soaked to the 3000ml 1.0%NaOH solution and leach after 4 hours, putting into beaker places pressure cooker at 0.2MPa again, decatize is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 2 hours, (needing 10 hours approximately) dries to constant weight under 105 ℃, obtain the 150g crude fibre, the cellulose yield is 50.1%, and cellulosic recovery rate is more than 95%.About 3000 grams of making beating liquid, about 2 grams of residual alkali number are acidified with acid and can get faint yellow lignin dry product 9.5 grams.Workshop section was more than 10 times, till elute effect is very poor before raffinate behind making beating liquid, cleaning solution or the extraction lignin can overlap and use.Black liquor after the neutralization is directly as the nutrient solution of soilless culture and the irrigation liquid of earth culture experiment, plant and aquatic organism well-grown, under the kindred circumstances in the existing black liquid and after but be difficult to make the plant survival, the technology black liquor of the present invention that the proof alkali consumption greatly reduces and do not add sulfide is good nutriment, may be developed as plant full-valence nutrition liquor or solid organic fertilizer fully.
It is as follows to apply mechanically correlated results:
Embodiment 5 (bamboo slurrying)
Soak after 38 hours with 500g bamboo (moisture 13.1%), in 3500ml 2.5%NaOH solution and to leach, putting into beaker places pressure cooker at 0.2MPa again, decatize is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 3 hours, (needing 10 hours approximately) dries to constant weight under 105 ℃, obtain the 273g crude fibre, the cellulose yield is 54.6%, and cellulosic recovery rate is more than 95%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Paper performance is as follows: beating degree SR 50, Kappa number 118.5, tensile index/Nmg
-144.8, tear index/mNm
2G
-17.2, burst index/kPam
2G
-13.0.
Embodiment 6 (bamboo slurrying)
Soak after 8 hours with 500g bamboo (moisture 13.1%), in 3500ml 1.5%NaOH solution and directly to place pressure cooker at 0.2MPa, boiling is taken out polishing, pulp washing, is leached under 118 ℃ of conditions after 2 hours, (needing 10 hours approximately) dries to constant weight under 105 ℃, obtain the 281g crude fibre, the cellulose yield is 56.2%, and cellulosic recovery rate is more than 95%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Beating degree SR 47, Kappa number 112.3, tensile index/Nmg
-146.4, tear index/mNm
2G
-16.8, burst index/kPam
2G
-13.1.
Embodiment 7 (pulping wood)
100g pine (drying) is used 600ml water, (25 ℃) soaked after 6 hours under the 30gNaOH solution submergence room temperature, boiling is taken out polishing, pulp washing, is leached under 150～170 ℃ of conditions after 3 hours, (needing 10 hours approximately) dries to constant weight under 105 ℃, obtain the 47.4g crude fibre, the cellulose yield is 47.4%, and cellulosic recovery rate is more than 90%.Operations such as paper moulding are pulled an oar, copied to crude fibre, detects paper performance at last.Paper performance is as follows: beating degree SR 50, Kappa number 98.7, tensile index/Nmg
-152.8, tear index/mNm
2G
-115.2, burst index/kPam
2G
-13.4.
Claims (14)
- A sectional type from plant material, extract cellulosic technology, this technology comprises the steps: plant material is soaked with the diluted alkaline amount of submergence plant, the decatize of pressurizeing again or boiling, polishing, pulp washing obtain cellulose at last.
- 2. according to the technology of claim 1, it comprises the steps:The concentration that the described plant material of non-timber is soaked in 2-～10 times weight is lower than in the diluted alkaline of 10w/v%, leaches afterwards, leaches thing pressurization decatize, take out then, and polishing, pulp washing leaches, and promptly obtains crude fibre.
- 3. according to the technology of claim 2, it comprises the steps:Is in the diluted alkaline of 0.5-10w/v% with described raw material soaking in the concentration of 2-10 times of weight, soaked at normal temperatures 2～48 hours, leach afterwards, leach thing pressurization decatize, steam temperature is 100 ℃～170 ℃, and pressure is 0.1～0.8MPa, and decatize heat time heating time is 0.5～7 hour, taking-up places water or preceding batch of rinsing black liquor to polish, clean then, promptly obtains crude fibre.
- 4. according to the technology of claim 3, it comprises the steps:Is in the diluted alkaline of 1-5w/v% with described raw material soaking in the concentration of 5-8 times of weight, soaked at normal temperatures 4～40 hours, leach afterwards, leach thing pressurization decatize, steam temperature is 100-130 ℃, and pressure is 0.1～0.3Mpa, and decatize heat time heating time is 0.5～3 hour, taking-up places water or preceding batch of rinsing black liquor to polish, clean then, promptly obtains crude fibre.
- 5. according to the technology of claim 3 or 4, wherein, stir in the immersion process, soak time is 2～10 hours.
- 6. according to arbitrary technology of claim 2-5, wherein, soaking the filter liquor recycled handles in the next group raw material soaking, polishing places water or preceding batch of pulp washing black liquor, the rinsing black liquor that the polishing pulp washing leaches extracts lignin through neutralization, remaining liquid can be used as making beating cleaning fluid or liquid fertilizer, or makes solid-state fertilizer.
- 7. according to arbitrary technology of claim 1-6, wherein, described plant material is straw, bamboo or Chinese alpine rush.
- 8. according to the technology of claim 7, wherein, described plant material is a Chinese alpine rush.
- 9. according to the technology of claim 1, it comprises the steps:The concentration that timber or bamboo plant material is soaked in 2-～10 times weight is lower than in the diluted alkaline of 10w/v%, carries out pressure cooking again, polishing, and pulp washing leaches, and promptly obtains crude fibre.
- 10. according to the technology of claim 9, it comprises the steps:Is in the diluted alkaline of 0.5-10w/v% with timber or bamboo raw material soaking in the concentration of 2-～10 times weight, soaked at normal temperatures 2～48 hours, pressure cooking, boiling temperature is 100 ℃～170 ℃, pressure is 0.1～0.8MPa, decatize heat time heating time is 0.5～7 hour, and timber after the boiling or bamboo place the water or the preceding batch of rinsing black liquor polishing, clean, and promptly obtain crude fibre.
- 11. according to the technology of claim 10, it comprises the steps:Is in the diluted alkaline of 1-5w/v% with timber or bamboo raw material soaking in the concentration of 5-8 times of weight, after soaking 4～40 hours at normal temperatures, pressure cooking again, boiling temperature is 100-130 ℃, and pressure is 0.1～0.3Mpa, and boiling heat time heating time is 0.5～3 hour, take out timber or bamboo then, the cooking liquor recycled is handled in the next group raw material soaking, and timber after the boiling or bamboo place water or preceding batch of rinsing black liquor to polish, clean, and promptly obtain crude fibre.
- 12. according to arbitrary technology of claim 9-11, wherein, the cooking liquor recycled is handled in the next group raw material soaking, the polishing pulp washing leach the rinsing black liquor extract lignin through neutralization, remaining liquid is as liquid fertilizer or make solid-state fertilizer.
- 13. according to the technology of claim 10, wherein, timber after the boiling or bamboo place cooking liquor to polish.
- 14. the purposes of the crude fibre that arbitrary technology of claim 1-13 obtains, this crude fibre are used for papermaking or use the raw material of purposes as other.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102403266A CN101748633B (en) | 2008-12-19 | 2008-12-19 | Novel cellulose extraction process |
| PCT/CN2009/001502 WO2010069151A1 (en) | 2008-12-19 | 2009-12-18 | Process for extracting cellulose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102403266A CN101748633B (en) | 2008-12-19 | 2008-12-19 | Novel cellulose extraction process |
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| Publication Number | Publication Date |
|---|---|
| CN101748633A true CN101748633A (en) | 2010-06-23 |
| CN101748633B CN101748633B (en) | 2012-07-04 |
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| CN2008102403266A Active CN101748633B (en) | 2008-12-19 | 2008-12-19 | Novel cellulose extraction process |
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| CN102337687A (en) * | 2010-07-15 | 2012-02-01 | 北京英力和泓新材料技术有限公司 | Novel pulping process for obtaining high performance fiber at high yield from plants |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2010069151A1 (en) | 2010-06-24 |
| CN101748633B (en) | 2012-07-04 |
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