CN105256634B - A kind of method for improving viscose rayon dissolving pulp reactivity worth - Google Patents
A kind of method for improving viscose rayon dissolving pulp reactivity worth Download PDFInfo
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- CN105256634B CN105256634B CN201510701381.0A CN201510701381A CN105256634B CN 105256634 B CN105256634 B CN 105256634B CN 201510701381 A CN201510701381 A CN 201510701381A CN 105256634 B CN105256634 B CN 105256634B
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- slurry
- dissolving pulp
- reactivity worth
- viscose rayon
- pulp
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- 229920000875 Dissolving pulp Polymers 0.000 title claims abstract description 55
- 229920000297 Rayon Polymers 0.000 title claims abstract description 40
- 230000009257 reactivity Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000002525 ultrasonication Methods 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000002023 wood Substances 0.000 claims abstract description 6
- 241001343274 Dichrostachys spicata Species 0.000 claims abstract description 5
- 238000000527 sonication Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000013589 supplement Substances 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 7
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000009210 therapy by ultrasound Methods 0.000 description 4
- 235000011609 Pinus massoniana Nutrition 0.000 description 3
- 241000018650 Pinus massoniana Species 0.000 description 3
- 241000219000 Populus Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000005360 mashing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000192783 Hakea sericea Species 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention provides a kind of method for improving viscose rayon dissolving pulp reactivity worth, using needlebush or the prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp of leaf wood, 18L water is first added in beater trough, it is slowly added to slurry, supplement water makes slurry concentration reach 1.57%, discongest 30 minutes, by the mass concentration of pulp concentration to 20 25%, then certain slurry is taken to be transferred in beaker, slurry is diluted with water to 0.5 2% mass concentration, 200 milliliters of cumulative volume, stir, it is positioned in ice bath and carries out ultrasonication, ultrasonic frequency is 25KHz, 10 900 watts of ultrasonic power, it is ultrasonically treated 1 15 minutes total times, each sonication treatment time 2 seconds, 4 seconds intermittent times；The slurry being disposed is filtered, air-dried under the conditions of constant temperature and humidity to 95% mass concentration.The ultrasonication of the present invention can improve viscose rayon dissolving pulp reactivity worth, and ensure that the viscosity of slurry.
Description
【Technical field】
The present invention relates to the ameliorative way of dissolving pulp reactivity worth, more particularly to a kind of raising viscose rayon dissolving pulp are anti-
The method for answering performance.
【Background technology】
Dissolving pulp is a kind of refining chemical pulps, also known as refined stock or pulp, has alpha-cellulose content height, hemicellulose
It is low with lignin content and the characteristics of be practically free of resin and ash content.Dissolving pulp is mainly used in textile industry and tobacco manufacturing industry, its
In 60% be used for textile grade viscose fiber production.1,800,000 tons of China's import dissolving pulp in 2013,2,090,000 tons of import in 2014,
It is expected that the demand (including dissolving pulp for other purposes) of domestic dissolving pulp in 2015 will break through 3,000,000 tons, the year two thousand twenty is complete
Ball dissolving pulp demand is up to 10,000,000 tons.Therefore, many enterprises in pulp and paper industry of recent year, as Fujian Qingshan Paper,
Chenming Group, Sun Paper Group etc., pass through technological transformation or newly-built a plurality of extensive dissolving pulp production line.The production of dissolving pulp can use
Prehydrolytic sulfate process and acid sulfite process, the widely used prehydrolytic sulfate process of current newly-built or expansion project.
For viscose rayon dissolving pulp, its reactivity worth refer mainly to dissolving pulp in the basic conditions with carbon disulfide
Respond.The height of reactivity worth be directly connected to the production process of viscose rayon, the final quality of viscose rayon and
Many problems such as cost, environmental protection and efficiency related to this.Higher reactivity worth can reduce downstream viscose rayon life
Dosage and the discharge of enterprise's sodium hydroxide and carbon disulfide are produced, improves filtrability of viscose, shortens cellulose ageing time, Jin Erti
High viscose rayon production efficiency.Viscose rayon is external at present mainly using Fock reactivity with the sign of dissolving pulp reactivity worth
Can, the country mainly uses viscose filtration performance.Fock reactivity worth value (%) is higher, and viscose filtration degree of retardation (second) is lower, says
The reactivity worth of bright dissolving pulp is better.
But reactivity worth it is relatively low be current dissolving pulp and viscose rayon manufacturing enterprise faced be most difficult to solve the problems, such as
One of, seriously affect dissolving pulp and the normal production of viscose rayon manufacturing enterprise and product quality.Both at home and abroad for how to change
The research of kind dissolving pulp reactivity worth is focused primarily upon using biology enzyme or mechanical treatment.But biology enzyme can cause slurry to glue
Degree is remarkably decreased, and reduces the physical strength of downstream viscose rayon product；Mechanical treatment (PFI defibrinations or Valley mashing or coffee machine
Break up) improve the DeGrain of viscose rayon dissolving pulp reactivity worth, and is largely using Fock reactivity worth as finger
Mark, the research for viscose filtration performance are considerably less.Both at home and abroad it has not been found that research is fine using ultrasonication raising viscose glue
The documents and materials of Wesy's dissolving pulp reactivity worth.
【The content of the invention】
The technical problem to be solved in the present invention, it is to provide a kind of side for improving viscose rayon dissolving pulp reactivity worth
Method, which solve the problem of existing dissolving pulp reactivity worth is low.
What the present invention was realized in：
A kind of raising viscose rayon method of dissolving pulp reactivity worth, the described method comprises the following steps：
Step 1, slurry prepare：Using needlebush or the prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp of leaf wood
As slurry, slurry is first torn into fractionlet, then discongested in the beater of Valley；
Discongesting before step 2, ultrasonication：18 liters of water are first added in beater trough, are slowly added to slurry, time
Control adds slurry within 2-4 minutes, and supplement water makes stock quality concentration reach 1.57%, discongests the time 30 minutes；It will discongest
Pulp concentration afterwards is then transferred into equilibrium water conten in the polyethylene plastic bag with seal to 20-25% mass concentration
It is standby；
Step 3, ultrasonication：It is dense to be diluted with water regulation stock quality in beaker for the treated slurry of step 2 of learning from else's experience
Spend for 0.5-2%, stir；Beaker is placed in ice bath, so that temperature is put into ultrasonic wave at 20-30 DEG C in processing procedure
In cell disruptor, ultrasonic cell disruptor power switch is opened, ultrasonic power 10-900W is set, when being ultrasonically treated total
Between 1-15 minutes；
Step 4, air-dry：The slurry that step 3 is disposed is filtered on a buchner funnel, will pump moisture afterwards
Slurry is torn up, and mass concentration is air-dried under the conditions of constant temperature and humidity as 95%.
Further, pulp concentration uses the extruding of 200 mesh nets to be concentrated to mass concentration as 20-25% in the step 2.
Further, the slurry weight added in the step 2 is (360 ± 5) gram.
Further, in the step 3, the ultrasonic cell disruptor used is Ningbo Xin Yi ultrasonic devices Co., Ltd
The JY92-IIDN ultrasonic cell disruptors of production.
Further, in the step 3, the volume of pulp suspension per treatment is 200 milliliters.
Further, in the step 3, ultrasonic frequency during ultrasonication is 25KHz.
Further, the processing procedure of the step 3 will ensure that ultrasonic transducer is placed in below pulp suspension liquid level
1-2 centimeters；Each sonication treatment time is set 2 seconds, 4 seconds intermittent times.
The invention has the advantages that：
The inventive method is when carrying out ultrasonication, slurry concentration, ultrasonic power during by changing ultrasonication
And the time, improve the reactivity worth of viscose rayon dissolving pulp.Slurry is also assures that while dissolving pulp reactivity worth is improved
The viscosity of material, namely ensure that the physical strength of downstream product viscose rayon.
【Embodiment】
The present invention relates to a kind of method for improving viscose rayon dissolving pulp reactivity worth, methods described includes following step
Suddenly：
Step 1, slurry prepare：Using needlebush or the prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp of leaf wood
As slurry, slurry is first torn into fractionlet, then discongested in the beater of Valley；
Discongesting before step 2, ultrasonication：18 liters of water are first added in beater trough, are slowly added to slurry, time
Control adds slurry within 2-4 minutes, and supplement water makes stock quality concentration reach 1.57%, discongests the time 30 minutes；It will discongest
Pulp concentration afterwards is then transferred into equilibrium water conten in the polyethylene plastic bag with seal to 20-25% mass concentration
It is standby；
Step 3, ultrasonication：It is dense to be diluted with water regulation stock quality in beaker for the treated slurry of step 2 of learning from else's experience
Spend for 0.5-2%, stir；Beaker is placed in ice bath, so that temperature is put into ultrasonic wave at 20-30 DEG C in processing procedure
In cell disruptor, ultrasonic cell disruptor power switch is opened, ultrasonic power 10-900W is set, when being ultrasonically treated total
Between 1-15 minutes；
Step 4, air-dry：The slurry that step 3 is disposed is filtered on a buchner funnel, will pump moisture afterwards
Slurry is torn up, and mass concentration is air-dried under the conditions of constant temperature and humidity as 95%.
Pulp concentration uses the extruding of 200 mesh nets to be concentrated to mass concentration as 20-25% in the step 2.
The slurry weight added in the step 2 is (360 ± 5) gram.
In the step 3, the ultrasonic cell disruptor used is the production of Ningbo Xin Yi ultrasonic devices Co., Ltd
JY92-IIDN ultrasonic cell disruptors.
In the step 3, the volume of pulp suspension per treatment is 200 milliliters.
In the step 3, ultrasonic frequency during ultrasonication is 25KHz.
The processing procedure of the step 3 will ensure that ultrasonic transducer is placed in 1-2 centimeters below pulp suspension liquid level；
Each sonication treatment time is set 2 seconds, 4 seconds intermittent times.
Below in conjunction with specific embodiment, the present invention is further illustrated.
The preparation of slurry：Needlebush or leaf wood prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp, are derived from enterprise
Pulpboard in raw material storage.
Discongesting before ultrasonication：The preferred Valley trough-style pulp beater of device therefor (PL4-00 types) when discongesting, Xianyang are safe
Si Te testing equipments Co., Ltd.
18L water is first added in beater trough, starts mashing electromechanical source, is slowly added to (360 ± 5) gram slurry, time
Control adds slurry within 2-4 minutes, supplements water, slurry concentration is reached 1.57%, discongest the time 30 minutes；After discongesting
Slurry using 200 mesh net extruding be concentrated to 20-25% mass concentrations, be placed in equilibrium water in the polyethylene plastic bag of sealing
Point, it is standby.
Ultrasonication：The slurry after discongesting is taken in beaker, is diluted with water to 200 milliliters, dense slurry is 0.5-2% (matter
Measure concentration), stir.Beaker is placed in ice bath, so that temperature is put into supersonic cell at 20-30 DEG C in processing procedure
In pulverizer (JY92-IIDN types, Ningbo Xin Yi ultrasonic devices Co., Ltd).Processing procedure will ensure that ultrasonic transducer is placed in
1-2 centimeters below pulp suspension liquid level.Open ultrasonic cell disruptor power switch, setting ultrasonic power 10-
900W, it is ultrasonically treated minute total time 1-15, ultrasonic frequency 25KHz.To prevent processing procedure medium temperature from spending height, set every
Secondary sonication treatment time 2 seconds, 4 seconds intermittent times.
Air-dry：It is disposed and slurry is filtered on a buchner funnel, remove moisture removal, is air-dried under the conditions of constant temperature and humidity
To 95% concentration (mass concentration, i.e. oven dry stock for gross weight 95%).
Embodiment reactivity worth determines：Two methods, one kind is Fock reactivity worth (%), and one kind is viscose filtration performance
(second).Fock reactivity worth measure carried out according to a kind of improved method of testing (Tian C, Zheng L, Miao Q, Nash C,
Cao C,Ni Y(2013)Improvement in the Fock test for reactivity of dissolving
pulp.Tappi J 12:19-24).Viscose filtration performance (second) is according to People's Republic of China's textile industry standard《Viscose glue is fine
The measure of Wesy's pulp reactivity worth》FZ/T50010.13-2011.Determine reactivity worth when slurry mass dryness fraction to reach 95% with
On.
Embodiment 1：Poplar prehydrolysis sulfate dissolving pulp, ultrasonic treatment time 60 seconds, 700 watts of processing power, slurry are dense
1.0%, ultrasonic frequency 25KHz.Measurement result is as shown in table 1.
Table 1
Embodiment 2：Poplar sulphite dissolving pulp, ultrasonic treatment time 90 seconds, 560 watts of processing power, slurry are dense
0.5%, ultrasonic frequency 25KHz.Measurement result is as shown in table 2.
Table 2
Embodiment 3：Masson pine prehydrolysis sulfate dissolving pulp, ultrasonic treatment time 300 seconds, 630 watts of processing power, slurry
Dense 1.5%, ultrasonic frequency 25KHz.Measurement result is as shown in table 3.
Table 3
Embodiment 4：Masson pine sulphite dissolving pulp, ultrasonic treatment time 120 seconds, 450 watts of processing power, slurry are dense
2.0%, ultrasonic frequency 25KHz.Measurement result is as shown in table 4.
Table 4
The result of four embodiments of the above shows, using ultrasonic wave to viscose rayon with leaf wood (poplar) or needlebush
(masson pine) prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp are handled, and relative to untreated slurry sample, are being dissolved
In the case that slurry viscosity is basically unchanged, the Fock reactivity worth and viscose filtration performance of dissolving pulp significantly improve, specifically
Show as the raising of Fock reactivity worth and the decline of viscose filtration degree of retardation (second).
The inventive method is when carrying out ultrasonication, slurry concentration, ultrasonic power during by changing ultrasonication
And the time, improve the reactivity worth of viscose rayon dissolving pulp.Slurry is also assures that while dissolving pulp reactivity worth is improved
The viscosity of material, namely ensure that the physical strength of downstream product viscose rayon.
Although the foregoing describing the embodiment of the present invention, those familiar with the art should manage
Solution, the specific embodiment described by us are merely exemplary, rather than for the restriction to the scope of the present invention, are familiar with this
The equivalent modification and change that the technical staff in field is made in the spirit according to the present invention, should all cover the present invention's
In scope of the claimed protection.
Claims (6)
- A kind of 1. method for improving viscose rayon dissolving pulp reactivity worth, it is characterised in that：It the described method comprises the following steps：Step 1, slurry prepare：Using the prehydrolysis sulfate dissolving pulp or sulphite dissolving pulp conduct of needlebush or leaf wood Slurry, slurry is first torn into fractionlet, then discongested in the beater of Valley；Discongesting before step 2, ultrasonication：18 liters of water are first added in beater trough, are slowly added to slurry, time control Within 2-4 minutes, slurry is added, supplement water makes stock quality concentration reach 1.57%, discongests the time 30 minutes；After discongesting It is standby to be then transferred into equilibrium water conten in the polyethylene plastic bag with seal to 20-25% mass concentration for pulp concentration；Step 3, ultrasonication：In beaker, be diluted with water regulation stock quality concentration is the treated slurry of step 2 of learning from else's experience 0.5-2%, stir；Beaker is placed in ice bath, so that temperature is put into supersonic cell at 20-30 DEG C in processing procedure In pulverizer, ultrasonic cell disruptor power switch is opened, sets ultrasonic power 10-900W, is ultrasonically treated total time 1- 15 minutes；The processing procedure of the step 3 will ensure that ultrasonic transducer is placed in 1-2 centimeters below pulp suspension liquid level； Each sonication treatment time is set 2 seconds, 4 seconds intermittent times；Step 4, air-dry：The slurry that step 3 is disposed is filtered on a buchner funnel, will pump the slurry of moisture afterwards Tear up, mass concentration is air-dried under the conditions of constant temperature and humidity as 95%.
- A kind of 2. method for improving viscose rayon dissolving pulp reactivity worth according to claim 1, it is characterised in that：Institute Stating pulp concentration in step 2 uses the extruding of 200 mesh nets to be concentrated to mass concentration as 20-25%.
- 3. a kind of method for improving viscose rayon dissolving pulp reactivity worth according to claim 1 or 2, its feature exist In：The slurry weight added in the step 2 is 360 ± 5 grams.
- A kind of 4. method for improving viscose rayon dissolving pulp reactivity worth according to claim 1, it is characterised in that：Institute State in step 3, the ultrasonic cell disruptor used is the JY92-IIDN ultrasounds of Ningbo Xin Yi ultrasonic devices Co., Ltd production Ripple cell disruptor.
- A kind of 5. method for improving viscose rayon dissolving pulp reactivity worth according to claim 1, it is characterised in that：Institute State in step 3, the volume of pulp suspension per treatment is 200 milliliters.
- A kind of 6. method for improving viscose rayon dissolving pulp reactivity worth according to claim 1, it is characterised in that：Institute State in step 3, ultrasonic frequency during ultrasonication is 25kHz.
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| CN105803841A (en) * | 2016-04-22 | 2016-07-27 | 福建农林大学 | Method for improving viscose bamboo pulp reaction performance |
| CN107151931B (en) * | 2017-06-30 | 2019-01-25 | 陕西科技大学 | A method of viscose rayon dissolving pulp reactivity worth is improved with heteropoly acid |
| CN107419587A (en) * | 2017-08-11 | 2017-12-01 | 湖北工业大学 | High-temperature resistant roasting paper and its manufacture method |
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| CN102041570B (en) * | 2010-08-24 | 2012-07-04 | 宜宾海丝特纤维有限责任公司 | Method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers |
| CN201793513U (en) * | 2010-08-24 | 2011-04-13 | 宜宾海丝特纤维有限责任公司 | Vegetable fibre ultrasound polyethylene-reducing alkali fibre production device |
| CN104452397B (en) * | 2014-11-21 | 2017-01-25 | 福建农林大学 | Method for improving reactive performance of prehydrolysis sulfate dissolving pulp |
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