CN1063732A - Small hemp full stalk pulping and papermaking method - Google Patents
Small hemp full stalk pulping and papermaking method Download PDFInfo
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- CN1063732A CN1063732A CN 91104237 CN91104237A CN1063732A CN 1063732 A CN1063732 A CN 1063732A CN 91104237 CN91104237 CN 91104237 CN 91104237 A CN91104237 A CN 91104237A CN 1063732 A CN1063732 A CN 1063732A
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- paper
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- pockmarks
- slurry
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004537 pulping Methods 0.000 title claims abstract description 12
- 244000025254 Cannabis sativa Species 0.000 title abstract description 6
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 title abstract 4
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 title abstract 4
- 235000009120 camo Nutrition 0.000 title abstract 4
- 235000005607 chanvre indien Nutrition 0.000 title abstract 4
- 239000011487 hemp Substances 0.000 title abstract 4
- 239000000123 paper Substances 0.000 claims abstract description 60
- 239000002655 kraft paper Substances 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 43
- 229920002472 Starch Polymers 0.000 claims description 20
- 235000019698 starch Nutrition 0.000 claims description 20
- 239000008107 starch Substances 0.000 claims description 20
- 238000010009 beating Methods 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 11
- 241000208202 Linaceae Species 0.000 claims description 9
- 235000004431 Linum usitatissimum Nutrition 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 claims description 4
- 150000004056 anthraquinones Chemical class 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002562 thickening agent Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 235000014347 soups Nutrition 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 230000009172 bursting Effects 0.000 abstract description 7
- 229920005610 lignin Polymers 0.000 abstract description 2
- 238000007645 offset printing Methods 0.000 abstract description 2
- 239000011087 paperboard Substances 0.000 abstract 2
- 239000002023 wood Substances 0.000 abstract 2
- 241000274582 Pycnanthus angolensis Species 0.000 abstract 1
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 abstract 1
- -1 anthracene ester Chemical class 0.000 abstract 1
- 235000012149 noodles Nutrition 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- 241000218235 Cannabaceae Species 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 241000722948 Apocynum cannabinum Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 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
- 241000124033 Salix Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
The invention discloses a method for pulping and papermaking by using small hemp stalks. The invention adopts the small hemp stalks which have low price, abundant and easily obtained raw materials to replace wood for pulping to manufacture kraft paper, kraft box board, fine dried noodle kraft board paper and offset printing book and periodical paper with high tightness, bursting strength and tearing strength. The invention overcomes the technical problems of different lignin content and more mixed cells of the whole stalk of the hemp seed, adopts the sulfate and anthracene ester mixing method for pulping, and the manufactured kraft paper, kraft liner paper board and liner kraft liner paper meet the standard. The invention has low production cost and high economic benefit, and has important significance for developing long fiber raw materials for non-wood papermaking.
Description
The present invention relates to the method for the full bar of the little pockmarks of a kind of usefulness (Cannabaceae cannabls satlval L) pulping and paper-making, is that the little pockmarks bar of a kind of usefulness slurry replaces the manufacture paper with pulp method of brown paper, kraft liner paper, kraft liner board and offset printing books and periodicals of wood pulp.
World's paper industry is timber more than 95%, and grass as raw material only accounts for 5%, and China is populous, forest reserves critical shortage, and the forest poor quality makes the national paper-making industry development of the such papermaking technology invention of China be subjected to serious obstruction in addition.Product category is few, of poor quality, production scale is little, production efficiency is low, seriously polluted, timber big bulge in price on the international market especially in recent years.More make the papermaking shortage of raw materials.The most of regional forest reserves of NORTHWEST CHINA are poor especially.In present disclosed patent documentation: as CN1047899A(application number 90104546.2; 1990,12,9 is open) what reported in " soybean bar pulping process ", CN87102581B " the full bamboo pulp of Ammonium Sulfite Method is produced kraft liner board ", CN85107578, " obtain reed chemical mechanical pulping manufacture paper with pulp kraft liner technology " and all kinds of document all is that to replace wood pulp solution paper making raw material be purpose to seek with wheat straw, cotton stalk, grass stalk, bluish dogbane, flax bar papermaking.Existing with wood pulp general soda processes and the sulfate process of adopting in the pulping process of good physical performance, anti tear degree height, bursting strength, high strength paper that tightness is good of manufacturing paper with pulp.With respect to soda processes, sulfate process yield height, the paper anti tear degree height of manufacturing paper with pulp.Low but the effect that can quicken to slough lignin of soda processes pulp strength.The all common in the literature report of said method.
The present invention proposes the method for utilizing the papermaking of little pockmarks bar total-bar slurry making.Little pockmarks belong to Cannabaceae (cannabls satlval L), are the especially oil crops widely cultivated of the Northwest of the northern area of China, and seed kind oil content is 33%, and the peasant is used to squeeze edible oil and iundustrial oil, are surplusly all burnt.
Brown paper, kraft are low, kraft liner board and offset paper etc. to the objective of the invention is to utilize big or small pockmarks total-bar slurry making to replace wood pulp to manufacture paper with pulp.
The medium and small pockmarks bar of method proposed by the invention refers to the full bar of little pockmarks-the comprise tip, stem, bar.Because full pole stock quality content differs, and heteroproteose cell is many, use the color of sulfate process slurry to use the intensity of soda processes slurry not good deeply, merely merely, the present invention proposes the method for sulfate and the slurrying of anthraquinone mixing method, provided the component of appropriate cooking liquor simultaneously.
The medium and small pockmarks bar of the method that the present invention carried total-bar slurry making papermaking process equally also is applicable to salix monogolica.
The present invention has formulated simultaneously to utilize and has not floated manufacture paper with pulp brown paper, kraft paper, kraft liner board and the utilization of little pockmarks bar slurry and floated the manufacture paper with pulp method of offset paper of little pockmarks bar slurry.
The technological process of slurrying of the present invention is:
The big full bar of waste of flax → get the raw materials ready (chipping) → boiling → washing.
The big waste of flax of 1, getting the raw materials ready is forbidden the big waste of flax admission of going mouldy, and the blank bar is long to be 25-40mm, and admission moisture content is no more than 20%, and qualification rate is more than 80%, and adopts the deduster dedusting.
The consumption of 2, boiling institute medication is: give that to soak soup humidity be about 90 ℃;
NaOH 14%(NaOH meter);
Na
2s 2-5%
Anthraquinone 0.05%
Sulphidity 15%
Liquor ratio 1: 3
Boiling maximum pressure 0.6-0.65MPa
Boiling curve:
By dress ball loam cake (1 hour) → idle running (10 points) → ventilation intensification (0-3.5MPa, 50 minutes-1 hour 10 minutes) → little steam bleeding (3.5-0MPa, 10 minutes) → secondary temperature elevation (60-90 branch, the material (0.65 or 0.6-20-30 branch) 0-0.65MPa) → insulation (90 minutes, 0.65 or 0.6) → spray is put upside down.
Boiling the entire process have about 5-6 hour, thick starch degree: 18-22K, and the residual alkali 4-8g/L of black liquor, the black liquor pH value is not less than 7.5, and unscreened yield can reach 50%-60%.Adopt the way of secondary temperature elevation, little steam bleeding when pressure is 3.5MPa promptly once heats up.
3, washing:
The kitchen sink washing under ball of thick slurry after the boiling is is slightly washed and starched and is washed the residual alkali in back and be controlled at 0.03-0.05g/L.
The paste color that the method that the present invention adopts is made is shallow, yield is high, and the various intensity height that can be used to manufacture paper with pulp, the anti tear degree is good and all very high paper of every physical index such as tightness, ring crush intensity, bursting strength.
The technological process of various paper of now will manufacturing paper with pulp in conjunction with the embodiments is described below:
The manufacture paper with pulp technological process of brown paper of embodiment 1():
Do not float the full bar slurry → making beating of big waste of flax (beating half stuff → double plate mill defibrination) → side pressure thickener → screening and removing impurities → copy paper.
The making beating defibrination then of pulling an oar earlier earlier discongests paper pulp with breaker beater, and long fiber is cut off, and washes while beating, and removes inside and outside impurities of fiber and heteroproteose cell.Carry out light cutter simultaneously and discongest, progressively pressurization.Be advisable with middle cutter making beating, both kept fibre length, abundant again silk brooming.Beating consistency is: 4.5-5%; Light cutter is discongested time 30-45 branch, and the making beating beating degree remains on 20-25 ° of SR, beats half stuff and finishes fiber humidity 8-9g.Defibrination adopts double plate to grind into slurry concentration 3.0-3.5%, 25-30 ° of SR of pulping beating degree; Fiber humidity 6-8g.
Screening and removing impurities is used the CX sieve, and sieve aperture is φ 1.8mm, advances to starch concentration 3%.
Copy the quantitative 80g/m of paper
2, starching amount #1 nets g/m
2, #2 nets g/m
2, online concentration 0.3-0.4%; Online pH value 4.5-5.5; Copy wide: 1092mm; Copy fast 22-25 rice/minute.Become paper moisture 8 ± 2%, the quality of finished paper index meets ZBY32014-88 " brown paper " standard.
The embodiment 2(kraft liner board technological process of manufacturing paper with pulp:
The core slurry: do not float the full bar of big waste of flax to starch → towards stock tank → beater → reserve pit → defibrination (series connection of two φ 350 double plates mills) → reserve pit → diaphragm-vibrating type half sieve → bed washer → 606 desanders → header box → online (three net hangings).
Starch adhesive: do not float the full bar of big waste of flax to starch → towards stock tank → beater → defibrination (φ 350 double plates mill defibrination) → applying glue (operation pond) → blending bin → 606 desanders → header box → online (a net hanging).
Beater is beaten half stuff, beating consistency: starch adhesive is 4.5-5%, and the core slurry is 4-4.5%; Making beating beating degree starch adhesive core slurry is 30 ± 2 ° of SR; Fiber wet weight starch adhesive 7-8g; Core slurry 8-10g.
With the double plate defibrination, inlet concentration core slurry starch adhesive is 3.5-4.0%; Inlet pressure is 0.2MPa; Pulping beating degree starch adhesive is 45 ± 2 ° of SR, and the core slurry is 35 ± 40 ° of SR; Fiber wet weight starch adhesive 5-6g, the core slurry is 7-8g.
Diaphragm-vibrating type plansifter concentration 0.2-0.4%, desander concentration is 0.4-0.5%.
Paper machine gives pressure → straight press → oven dry → press polish → ornamenting → rolling through multiple tracks with many nets of 1600mm multi-cylinder paper machine on paper machine.Starch adhesive ratio: account for the 15%(oven-dry weight); Online pH value 4.2-5.5; Online concentration 0.2-0.35%; Copy wide 1600mm.Copy 9 meters/minute of speed; Applying glue: rosin consumption-0.5%, addition of aluminum sulfate 1.5%(is oven dry stock); Become paper moisture content 10 ± 2%.
Quality of finished paper standard accord with Q B605-75 " kraft liner board " standard.
The manufacture paper with pulp technological process of kraft liner paper of embodiment 3-:
Core slurry: by useless yellow plate paper → pulper → bed washer → big tapering fluffer → thickener → φ 350 double plates mill (three series connection) → 0.9m
2CX sieve → bed washer → 14m
2Garden net thickener → operation pond → sand trap → scummer → header box → online.
Starch adhesive: do not float the full bar slurry → 1M of big waste of flax
3Hydrabrusher → φ 360 double plates mills (1), (2) → reserve pit (the applying glue) → operation pond → stuff box → scummer → selectifier → header box → online of φ 350 double plates mill.
Face, core slurry inlet concentration are 3.5%-4.0% during defibrination; Inlet pressure starch adhesive, core slurry are 0.2MPa; Throughput is and is not less than 14 kilograms/hour, and pulping beating degree starch adhesive remains on 45-50 ° of SR, and the core slurry is 30-35 ° of SR; The fiber wet weight starch adhesive remains on 6-7g, core slurry 4-5g.
Slagging-off concentration 0.2-0.4%, selectifier concentration 0.4-0.5%.
The starch adhesive ratio is bored the 15%(over dry when copying paper); Online concentration starch adhesive 0.2-0.35%, the core slurry is 0.4-0.45%; Online pH value 4.5-5.5; Copy the wide 1600mm that is; Copying speed is 18 meters/minute, becomes paper moisture content 10 ± 2%; Revolve glue rosin consumption 0.5%(to oven dry stock), addition of aluminum sulfate is 1.5%.
The manufacture paper with pulp technological process of offset paper of embodiment 4-: (summary)
The present invention utilizes little pockmarks bar total-bar slurry making papermaking social benefit and economic benefit very outstanding in the very poor the Northwest of the forest reserves.One ton of wood pulp needs 5 cubic metres of timber, and one ton little pockmarks bar slurry only needs 2.2 tons little pockmarks bars, and price is of great importance to solving China's long fiber paper making raw material well below timber.
Attached:
1, it is as follows not float the full bar of little pockmarks slurry result by the QB757-80 standard detection:
The ZB757-80 of index name unit measured result
Standard code
Quantitative g/m 100 109.5
Fracture length km 7.0 7.52
Be not less than
Bursting strength KPa 441 535
Be not less than
Tearability MN 981 1024
Be not less than
Dirt count/m
No more than
Wherein, 500g oven dry stock
1.5-3.0mm
2Individual/m 5000 does not have
5M
2Pulpboard
3.0-5.0mm
2Individual/m 15 does not have
5M
2Pulpboard
75.0mm
2Individual/m mustn't have or not
2, brown paper is pressed the ZB32014-32 detection, and its result is as follows:
The EBY32014-88 of index name unit regulation B grade standard measured result
Quantitative g/m
280+4.0 82
Bursting strength KPa 225 227
Tearability mN 590 627
3, kraft paper, testing result is as follows:
Index name unit's measured result
Quantitative g/m
2262
Tightness g/m
20.68
Bursting strength (being not less than) KPa 588
Anti-degree of telling (laterally being not less than) inferior 28
Degree of sizing (being not less than) mm＞1.0
4, the kraft liner board testing result is as follows:
Index name unit's measured result
Tightness g/m
2322
Bursting strength KPa 832
Average tear degree mN 3636
Positive smoothness S 8
Horizontal folding inferior 726
Horizontal ring crush intensity KN/m 3.59
Front degree of sizing mm 2.0
Claims (7)
1, little pockmarks bar total-bar slurry making papermaking process, the raw material that it is characterized in that being used for slurrying is the full bar of little waste of flax (comprising stem, the tip, bar), by get the raw materials ready → boiling → washing → technologies such as making beating make the full bar slurry of little pockmarks high and good brown paper, kraft liner board, kraft liner paper, the offset paper of intensity of anti tear degree that be used to manufacture paper with pulp.
2, the method for the little pockmarks bar of a kind of usefulness according to claim 1 total-bar slurry making papermaking is characterized in that above-mentioned boiling employing sulfate and anthraquinone mixing method, and used chemical liquid consumption is:
NaOH 12-15%(NaOH meter) Na
2S 2-5%
Anthraquinone 0.05%
The soup sulphidity is 15%; Liquor ratio is 1: 3; The boiling maximum pressure is 0.6-0.65MPa.
3, the method for the full bar slurry of the little pockmarks bar of boiling according to claim 2 is characterized in that boiling curve:
Dress ball loam cake (vapour pressure 0,1 hour time) → and idle running (10 minutes) → lead to vapour to heat up (50 minutes-1 hour 10 minutes, vapour pressure 3.5MPa) → little steam bleeding (10 minutes, vapour pressure 3.5MPa-0) → secondary temperature elevation (1: 00-1: 30, vapour pressure 0-0.6 or 0.65MPa) → insulation (1: 30-2: 00,0.6-0.65MPa) → spurt batch turning (the 20-30 branch, 0.6-0.65MPa), promptly adopt secondary temperature elevation when the pressure that once heats up reaches 3.5MPa, the method for little steam bleeding.
4, according to the method for the described little pockmarks total-bar slurry making of claim 1 papermaking, the technological process that the full bar of little pockmarks is starched the brown paper of manufacturing paper with pulp is:
Do not float the full bar slurry → making beating of little pockmarks bar (beater is beaten half stuff → double plate mill defibrination) → side pressure thickener → screening and removing impurities → copy paper, it is characterized in that making beating beats half stuff defibrination then earlier, beat half stuff terminal point beating degree and remain on 20-25 ° of SR, fiber wet weight 8-9g; 25-30 ° of SR of defibrination pulping beating degree, fiber wet weight 6-8 gram.
5, according to the described little pockmarks total-bar slurry making papermaking process of claim 1, core slurry, starch adhesive are and do not float the full bar slurry of little pockmarks bar when it is characterized in that manufacturing paper with pulp kraft liner board.
6, according to the described little pockmarks total-bar slurry making papermaking process of claim 1, starch adhesive adopts and does not float the full bar slurry of little pockmarks bar when it is characterized in that manufacturing paper with pulp kraft liner paper, and the core slurry can adopt useless yellow plate paper slurry.
7, little pockmarks bar total-bar slurry making papermaking process according to claim 1 adopts when it is characterized in that manufacturing paper with pulp offset paper and has floated the full bar slurry of little pockmarks bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104237 CN1063732A (en) | 1991-06-21 | 1991-06-21 | Small hemp full stalk pulping and papermaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104237 CN1063732A (en) | 1991-06-21 | 1991-06-21 | Small hemp full stalk pulping and papermaking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1063732A true CN1063732A (en) | 1992-08-19 |
Family
ID=4906504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91104237 Pending CN1063732A (en) | 1991-06-21 | 1991-06-21 | Small hemp full stalk pulping and papermaking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063732A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115441C (en) * | 2000-10-24 | 2003-07-23 | 王恭祎 | Technology for making paper by pulping with young poplar |
| CN104088186A (en) * | 2014-06-30 | 2014-10-08 | 四川理工学院 | Method for making ageratina adenophora bleaching paper pulp by adopting D1EpD2 process |
| CN104088183A (en) * | 2014-06-30 | 2014-10-08 | 四川理工学院 | Method for making sulfate natural color paper pulp from ageratina adenophora |
-
1991
- 1991-06-21 CN CN 91104237 patent/CN1063732A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115441C (en) * | 2000-10-24 | 2003-07-23 | 王恭祎 | Technology for making paper by pulping with young poplar |
| CN104088186A (en) * | 2014-06-30 | 2014-10-08 | 四川理工学院 | Method for making ageratina adenophora bleaching paper pulp by adopting D1EpD2 process |
| CN104088183A (en) * | 2014-06-30 | 2014-10-08 | 四川理工学院 | Method for making sulfate natural color paper pulp from ageratina adenophora |
| CN104088183B (en) * | 2014-06-30 | 2016-04-06 | 四川理工学院 | A kind of method of Eupatorium adenophorum bar extracting sulfuric acid salt true qualities paper pulp |
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