CN106592309B - A kind of preparation method of high quality dissolving pulp particle - Google Patents
A kind of preparation method of high quality dissolving pulp particle Download PDFInfo
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- CN106592309B CN106592309B CN201611132052.XA CN201611132052A CN106592309B CN 106592309 B CN106592309 B CN 106592309B CN 201611132052 A CN201611132052 A CN 201611132052A CN 106592309 B CN106592309 B CN 106592309B
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- dissolving pulp
- particle
- heat treatment
- pulp particle
- high quality
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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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention provides a kind of preparation method of high quality dissolving pulp particle comprising following operation: preparing the fibrous suspension on dissolving pulp production line, and carries out extruding to it to be concentrated into mass dryness fraction being 15%~30%, the dissolving pulp after must being concentrated；Dissolving pulp after concentration is dispersed, obtains dissolving pulp particle, and the partial size of the dissolving pulp particle is less than 1cm；Gained dissolving pulp particle is subjected to heat treatment reaction, the heat treatment reaction time is 2h~12h, and heat treatment reaction temperature is 90 DEG C~150 DEG C；After heat treatment, the dissolving pulp particle after taking out heat treatment is cooling up to high quality dissolving pulp particle.The present invention is while realizing raising dissolving pulp reactivity worth, reducing dissolving pulp inherent viscosity, it not only avoids the waste of water resource, reduce energy consumption, and there is lower production cost, but also have the characteristics that being easy to industrialize operation and little particle is easy to packing and transporting, therefore there is important production meaning and huge utility value.
Description
[technical field]
The invention belongs to pulping and paper-making and field of textile industry, and in particular to a kind of preparation side of high quality dissolving pulp particle
Method.
[background technique]
Dissolving pulp is a kind of special slurry of pulping and paper-making industry, high with many characteristics, including content of cellulose, wood
The features such as element is low with other impurities content, and whiteness is high, and reactivity worth is excellent.Dissolving pulp can be used as viscose fiber, nitrocellulose,
The raw material of acetate fiber and nano-cellulose is further able to production and prepares textile clothes, spectacle-frame, camera film, cigarette
Filter paper, pharmaceutical carrier etc..Dissolving pulp product and its spin-off have been widely used in weaving, food packaging, bio-pharmaceuticals
And in the numerous areas such as aerospace.
In recent years, with the exploitation of cotton price fluctuation and dissolving pulp industry, the consumption figure of China's dissolving pulp continues to increase,
Have become maximum dissolving pulp consumer nation；In this case, the performance for improving dissolving pulp promotes the quality of dissolving pulp,
For promoting the development of China's dissolving pulp industry, grabbing international dissolving pulp market has important strategic importance.The reaction of dissolving pulp
Performance is to measure the important indicator of dissolving pulp quality, it characterizes the dissolubility and chemical reaction ability of dissolving pulp, determines dissolution
The practical application effect of slurry；The promotion of its reactivity worth can not only shorten the processing reaction time of dissolving pulp, reduce chemicals
Dosage, and can be improved the uniformity and homogeneity of dissolving pulp cellulose products.In addition, viscosity is also to measure dissolving pulp quality
Key index.Viscosity is excessively high, and the respond of dissolving pulp reduces；Viscosity is too low, although can be improved the reactivity of dissolving pulp
Can, but will affect the strength character of cellulose products: therefore the characteristic of general control dissolving pulp is glued in the actual production process
Degree is 400mL/g~600mL/g.
Currently, research both at home and abroad, which focuses mostly on, improves the reactivity of dissolving pulp in mechanical jordaning or cellulase treatment mode
Can, and focus mostly on and be directed to the dissolution pulpboard of commodity, the i.e. post-processing of dissolving pulp, but there are problems that certain drawbacks and.
For example, Tian etc. uses coffee machine processing dissolution pulpboard to improve reactivity worth, but the operation processing amount is lower, is not easy to industrialize
Using, and efficiency consumption is larger, finally also results in the generation of fiber fines, influences other mass parameters of dissolving pulp.Miao
Pulpboard is dissolved Deng proposing that cellulase is handled, although can be improved the reactivity worth of dissolving pulp, enzymatic treatment condition is more severe
It carves, needs specified conditions to keep enzyme activity, and production cost is higher；Cellulase processing simultaneously is needed in lower dissolving pulp concentration shape
It is operated under state, this processing technique can consume a large amount of water, and need additional energy during pulp concentration after treatment
Amount output.
In general, the dissolution pulp fibres of dissolution slurry factory production, by the concentration molding of paper machine, cylinder dried is dehydrated and finally prepares
Finished product dissolves pulpboard；And cylinder dried will lead to the formation of hydrogen bond between fiber in dissolution pulpboard, i.e. the keratinization effect of fiber, most
The reactivity worth and accessibility that dissolving pulp can be reduced eventually, influence the quality of dissolving pulp.
[summary of the invention]
Technical problem to be solved by the present invention lies in providing a kind of preparation method of novel high quality dissolving pulp particle,
While realizing raising dissolution pulpboard reactivity worth, reduce dissolving pulp inherent viscosity, deviate from the moisture in dissolution pulp fibres, therefore
Production efficiency can be improved, reduce energy consumption, Improving The Quality of Products, but also have and be easy to industrialize operation and little particle is easy to beat
The characteristics of packet transport.
The present invention is to solve a kind of above-mentioned technical problem: preparation of high quality dissolving pulp particle by the following technical programs
Method, this method include following concrete operation step:
(1), prepare dissolving pulp production line on fibrous suspension, and it is carried out squeeze be concentrated into mass dryness fraction be 15%~
30%, the dissolving pulp after must being concentrated；
(2), the dissolving pulp after concentration is dispersed, obtains dissolving pulp particle, and the partial size of the dissolving pulp particle is less than
1cm；
(3), gained dissolving pulp particle is subjected to heat treatment reaction, the heat treatment reaction time is 2h~12h, heat treatment reaction
Temperature is 90 DEG C~150 DEG C；
(4), after heating, the dissolving pulp particle after taking out heat treatment is cooling up to high quality dissolving pulp
Grain.
Further, in the step (1), fibrous suspension is the paper pulp fiber solution on dissolving pulp production line.
Further, in the step (2), the dissolving pulp after concentration is dispersed using disperser.
Further, the disperser is any one of blender, dispersing device and fluffer.
Further, in the step (3), gained dissolving pulp particle is subjected to heat treatment reaction using heating device.
Further, the heating device is any one of baking oven, drying box or electric hot plate.
The beneficial effects of the present invention are:
A kind of preparation method of high quality dissolving pulp particle is provided, it is not only with higher to prepare resulting dissolving pulp particle
Reactivity worth, and good inherent viscosity is presented, high quality dissolving pulp particle can be obtained；In addition, prepared by the present invention
Method is easy to operate, is easy to industrialize operation, and replace dissolution pulpboard that can save dissolution pulpboard production using dissolving pulp particle
Necessary tradition copies paper machine, further decreases production cost, and dissolving pulp particle produced by the present invention also has and is easy to
The characteristics of packing and transporting.
[specific embodiment]
A kind of preparation method of high quality dissolving pulp particle of the present invention, this method includes following concrete operation step:
(1), prepare dissolving pulp production line on fibrous suspension, and it is carried out squeeze be concentrated into mass dryness fraction be 15%~
30%, the dissolving pulp after must being concentrated；
(2), the dissolving pulp after concentration is dispersed, obtains dissolving pulp particle, and the partial size of the dissolving pulp particle is less than
1cm；
(3), gained dissolving pulp particle is subjected to heat treatment reaction, the heat treatment reaction time is 2h~12h, heat treatment reaction
Temperature is 90 DEG C~150 DEG C；
(4), after heating, the dissolving pulp particle after taking out heat treatment is cooling up to high quality dissolving pulp
Grain.
Wherein, in step (1), the paper pulp fiber solution on dissolving pulp production line is can be selected in fibrous suspension；Step (2)
In, dissolving pulp after concentration is dispersed using disperser, in the optional blender of specific disperser, dispersing device and fluffer
It is any；In step (3), gained dissolving pulp particle is heated using heating device, the specific optional baking of heating device
Any one of case, drying box or electric hot plate.
In order to preferably be described to the method for the present invention, applicant gives following specific embodiment.
Embodiment 1 prepares high quality Eucalyptus prehydrolysis sulfate dissolving pulp particle
Prepare Eucalyptus prehydrolysis sulfate dissolving pulp fibrous suspension, and carry out extruding to it to be concentrated into mass dryness fraction being 17%,
Dissolving pulp after must being concentrated；Then the dissolving pulp particle for using disperser to be separated into partial size as 0.7cm the dissolving pulp after concentration；
Gained dissolving pulp particle is placed in 105 DEG C of baking oven heat treatment reaction later；Heat treatment reaction 4h after take out heat treatment react into
Row is cooling to get high quality Eucalyptus prehydrolysis sulfate dissolving pulp particle.
It will be grasped through the Eucalyptus prehydrolysis sulfate dissolving pulp fibrous suspension before the present embodiment operation processing with through this implementation
Preparation gained high quality Eucalyptus prehydrolysis sulfate dissolving pulp particle carries out reactivity worth, the characteristic of dissolving pulp respectively after dealing with
Viscosimetric analysis, it is known that, the reactivity worth of dissolving pulp is increased to that treated 77.79% from 50.22%, inherent viscosity then from
556mL/g is reduced to that treated 480mL/g.
Embodiment 2 prepares high quality Chinese hemlock spruce acid accumulator sulfite dissolving pulp particle
Prepare Chinese hemlock spruce acid accumulator sulfite dissolving pulp fibrous suspension, and carry out extruding to it to be concentrated into mass dryness fraction being 25%,
Dissolving pulp after must being concentrated；Then the dissolving pulp particle for using disperser to be separated into partial size as 0.4cm the dissolving pulp after concentration；
Gained dissolving pulp particle is placed in 110 DEG C of drying box heat treatment reaction later；Heat treatment reaction is taken out after heat treatment reaction 8h
It is cooled down to get high quality Chinese hemlock spruce acid accumulator sulfite dissolving pulp particle.
It will be grasped through the Chinese hemlock spruce acid accumulator sulfite dissolving pulp fibrous suspension before the present embodiment operation processing with through this implementation
Preparation gained Chinese hemlock spruce acid accumulator sulfite dissolving pulp particle carries out the reactivity worth of dissolving pulp respectively after dealing with, inherent viscosity is surveyed
It is fixed, it is known that, the reactivity worth of dissolving pulp is increased to that treated 87.79% from 45.22%, and inherent viscosity is then dropped from 640mL/g
As low as treated 512mL/g.
Embodiment 3 prepares high quality bamboo prehydrolysis sulfate dissolving pulp particle
Prepare bamboo prehydrolysis sulfate dissolving pulp fibrous suspension, and carry out extruding to it to be concentrated into mass dryness fraction being 18%, obtains
Dissolving pulp after concentration；Then the dissolving pulp particle for using disperser to be separated into partial size as 0.8cm the dissolving pulp after concentration；It
Gained dissolving pulp particle is placed in 120 DEG C of electric hot plate heat treatment reaction afterwards；Heat treatment reaction 6h after take out heat treatment react into
Row is cooling to get high quality bamboo prehydrolysis sulfate dissolving pulp particle.
It will be operated through the bamboo prehydrolysis sulfate dissolving pulp fibrous suspension before the present embodiment operation processing with through this implementation
Preparation gained bamboo prehydrolysis sulfate dissolving pulp particle carries out reactivity worth, the characteristic viscosity determining of dissolving pulp respectively after processing,
It is found that the reactivity worth of dissolving pulp is increased to that treated 84.79% from 52.22%, inherent viscosity is then reduced to from 570mL/g
Treated 490mL/g.
Embodiment 4 prepares high quality masson pine prehydrolysis sulfate dissolving pulp particle
Prepare masson pine prehydrolysis sulfate dissolving pulp fibrous suspension, and it is carried out to squeeze and is concentrated into mass dryness fraction and is
27%, the dissolving pulp after must being concentrated；Then the dissolving pulp for using disperser to be separated into partial size as 0.2cm the dissolving pulp after concentration
Particle；Gained dissolving pulp particle is placed in 130 DEG C of baking oven heat treatment reaction later；Heat treatment is taken out after heat treatment reaction 10h
Reaction is cooled down to get high quality masson pine prehydrolysis sulfate dissolving pulp particle.
It will be through the masson pine prehydrolysis sulfate dissolving pulp fibrous suspension before the present embodiment operation processing and through this implementation
It is viscous to carry out the reactivity worth of dissolving pulp, characteristic respectively for preparation gained masson pine prehydrolysis sulfate dissolving pulp particle after operation processing
Degree measurement, it is known that, the reactivity worth of dissolving pulp is increased to that treated 88.35% from 54.61%, and inherent viscosity is then from 680mL/
G is reduced to that treated 531mL/g.
The masson pine prehydrolysis sulfate dissolving pulp particle of the preparation high quality of embodiment 5
Prepare masson pine prehydrolysis sulfate dissolving pulp fibrous suspension, and it is carried out to squeeze and is concentrated into mass dryness fraction and is
15%, the dissolving pulp after must being concentrated；Then the dissolving pulp for using disperser to be separated into partial size as 0.7cm the dissolving pulp after concentration
Particle；Gained dissolving pulp particle is placed in 100 DEG C of baking oven heat treatment reaction later；It is anti-that heat treatment is taken out after heat treatment reaction 7h
It should be cooled down to get high quality masson pine prehydrolysis sulfate dissolving pulp particle.
It will be through the masson pine prehydrolysis sulfate dissolving pulp fibrous suspension before the present embodiment operation processing and through this implementation
It is viscous to carry out the reactivity worth of dissolving pulp, characteristic respectively for preparation gained masson pine prehydrolysis sulfate dissolving pulp particle after operation processing
Degree measurement, it is known that, the reactivity worth of dissolving pulp is increased to that treated 78.31% from 52.31%, and inherent viscosity is then from 660mL/
G is reduced to that treated 570mL/g.
By the various embodiments described above it is found that the present invention can destroy the strand of cellulose by heat treatment of fibre particle,
The molecular weight and viscosity for reducing cellulose, improve the accessibility of fiber, additionally it is possible to weaken the keratinization effect of dissolution pulp fibres, most
The reactivity worth for dramatically increasing dissolving pulp eventually prepares the dissolving pulp particle of the low inherent viscosity of high response energy；I.e. the present invention not only
It can be improved the reactivity worth of dissolving pulp, and the inherent viscosity of dissolving pulp can be adjusted, dissolving pulp particle is made with high-quality
The characteristics of amount；The present invention realizes the integration production that dissolving pulp is concentrated and dried and reactivity worth improves, and can replace completely
The conventional operation mode that dissolving pulp concentration and dissolution pulpboard are manufactured paper with pulp, rejects paper of manufacturing paper with pulp indispensable in traditional dissolving pulp production method
Machine, therefore occupied area can be saved, equipment investment is reduced, while reducing energy consumption, further decreases production cost；In addition, this
Inventive method is easy to operate, is easy to industrialize operation, and dissolving pulp particle obtained also has the characteristics that be easy to packing and transporting.
Claims (5)
1. a kind of preparation method of high quality dissolving pulp particle, it is characterised in that: this method includes following concrete operation step:
(1), prepare dissolving pulp fibrous suspension, and carry out extruding to it to be concentrated into mass dryness fraction being 15%~30%, after must being concentrated
Dissolving pulp；
(2), the dissolving pulp after concentration is dispersed, obtains dissolving pulp particle, and the partial size of the dissolving pulp particle is less than 1cm；
(3), gained dissolving pulp particle is subjected to heat treatment reaction, the heat treatment reaction time is 2h~12h, is heat-treated reaction temperature
It is 90 DEG C~150 DEG C；
(4), after heating, the dissolving pulp particle after taking out heat treatment is cooling up to high quality dissolving pulp particle.
2. a kind of preparation method of high quality dissolving pulp particle according to claim 1, it is characterised in that: the step (2)
In, the dissolving pulp after concentration is dispersed using disperser.
3. a kind of preparation method of high quality dissolving pulp particle according to claim 2, it is characterised in that: the disperser is
Any one of blender, dispersing device and fluffer.
4. a kind of preparation method of high quality dissolving pulp particle according to claim 1, it is characterised in that: the step (3)
In, gained dissolving pulp particle is heated using heating device.
5. a kind of preparation method of high quality dissolving pulp particle according to claim 4, it is characterised in that: the heating device
For any one of baking oven, drying box or electric hot plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611132052.XA CN106592309B (en) | 2016-12-09 | 2016-12-09 | A kind of preparation method of high quality dissolving pulp particle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611132052.XA CN106592309B (en) | 2016-12-09 | 2016-12-09 | A kind of preparation method of high quality dissolving pulp particle |
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| CN106592309A CN106592309A (en) | 2017-04-26 |
| CN106592309B true CN106592309B (en) | 2019-02-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154892A (en) * | 2011-03-31 | 2011-08-17 | 重庆理文造纸有限公司 | Process for screening bamboo wood dissolving pulp |
| CN102337693A (en) * | 2011-09-30 | 2012-02-01 | 重庆理文造纸有限公司 | Process for stewing and washing dissolving pulp |
| CN104452397A (en) * | 2014-11-21 | 2015-03-25 | 福建农林大学 | Method for improving reactive performance of prehydrolysis sulfate dissolving pulp |
| WO2016106473A1 (en) * | 2014-12-31 | 2016-07-07 | 沈爱云 | Pulp made using spirogyra and preparation method therefor |
| CN105803841A (en) * | 2016-04-22 | 2016-07-27 | 福建农林大学 | Method for improving viscose bamboo pulp reaction performance |
-
2016
- 2016-12-09 CN CN201611132052.XA patent/CN106592309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154892A (en) * | 2011-03-31 | 2011-08-17 | 重庆理文造纸有限公司 | Process for screening bamboo wood dissolving pulp |
| CN102337693A (en) * | 2011-09-30 | 2012-02-01 | 重庆理文造纸有限公司 | Process for stewing and washing dissolving pulp |
| CN104452397A (en) * | 2014-11-21 | 2015-03-25 | 福建农林大学 | Method for improving reactive performance of prehydrolysis sulfate dissolving pulp |
| WO2016106473A1 (en) * | 2014-12-31 | 2016-07-07 | 沈爱云 | Pulp made using spirogyra and preparation method therefor |
| CN105803841A (en) * | 2016-04-22 | 2016-07-27 | 福建农林大学 | Method for improving viscose bamboo pulp reaction performance |
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| CN106592309A (en) | 2017-04-26 |
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