CN106381742A - Method for improving reaction property of dissolving pulp board - Google Patents
Method for improving reaction property of dissolving pulp board Download PDFInfo
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- CN106381742A CN106381742A CN201611004075.2A CN201611004075A CN106381742A CN 106381742 A CN106381742 A CN 106381742A CN 201611004075 A CN201611004075 A CN 201611004075A CN 106381742 A CN106381742 A CN 106381742A
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- Prior art keywords
- pulpboard
- dissolving
- cellulase
- dissolving pulp
- cellulase solution
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Classifications
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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
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Paper (AREA)
Abstract
The invention provides a method for improving the reaction property of a dissolving pulp board. The method comprises the following steps of adopting the dissolving pulp board with the thickness being 0.05cm to 0.50cm, and controlling the moisture content of the dissolving pulp board to be 2 percent to 10 percent for standby use; adopting cellulase for preparing a cellulase solution with the mass concentration being 5 percent to 10 percent, adopting strong acidic-weak basic salt for adjusting a pH value of the cellulase solution to be 4.5 to 5.5, and obtaining a cellulase solution for standby use; sequentially and uniformly spraying the cellulase solution for standby use and water on the processed dissolving pulp board, and preparing to react; putting the dissolving pulp board into a constant temperature and humidity room for reacting, wherein the temperature of the constant temperature and humidity room ranges from 40 to 60 DEG C, and the humidity of the constant temperature and humidity room is consistent to the moisture content of the sprayed dissolving pulp board. According to the method provided by the invention, the reaction property of the dissolving pulp board is improved, meanwhile, not only is the waste of water resource avoided, but also the energy consumption is reduced, and the method is lower in cost.
Description
【Technical field】
The present invention relates to a kind of method improving substance reaction performance is and in particular to a kind of improve dissolving pulpboard reactivity worth
Method.
【Background technology】
Dissolving pulp is a kind of special slurry of pulping and paper-making industry, is that plant fiber material is prepared through chemical treatment
A kind of refined slurry.Dissolving pulp has many characteristics, high including content of cellulose, and lignin and other impurities content are low, and whiteness is high,
The features such as reactivity worth is excellent.Dissolving pulp can produce regenerated cellulose, including viscose fiber, nitrocellulose and acetate fiber
Deng；Cellulose derivative can be prepared, including carboxymethyl cellulose, ethyl cellulose and methylcellulose；Can be with preparing nano
Cellulose, including nanofibrils cellulose and nano micro crystal cellulose etc..Therefore, dissolving pulp product and its spin-off by
It is widely used in the numerous areas such as weaving, packaging for foodstuff, health care, bio-pharmaceuticals.
In recent years, the consumption figure of China's dissolving pulp continues to increase, and the consumption figure of current dissolving pulp already takes up the whole world
More than 50%, become the maximum country of dissolving pulp consumption figure in the world.The dissolving pulp of China is fine mainly for the production of preparing viscose
Dimension, for field of textiles；Viscose fiber is regenerated cellulose, and it is with dissolving pulp as raw material, through cellulose alkalization, cellulose
Aging, cellulose sulfonation and the step such as cellulose regenerated produce.The reactivity worth of dissolving pulp is to weigh dissolving pulp quality
Important indicator parameter, prepared by dissolving pulp with the process of viscose fiber and the final quality of viscose fiber have extremely important
Impact；The reactivity worth improving dissolving pulp can substantially reduce disappearing of alkali liquor in viscose fiber production process and Carbon bisulfide
Consumption, shortens and alkalizes and ageing time, and improves the uniformity of cellulose products, finally can reduce production cost, reduction has
Noxious material discharge and improve product quality.
At present, adopt cellulase treatment to improve the reactivity worth of dissolving pulp raw material both at home and abroad, basic step is more：First will be molten
Solution pulpboard size degradation obtains dissolving pulp, then needs to add water that dissolving pulp is diluted to low concentration state (low dissolving pulp CONCENTRATION STATE), and
Adopt cellulose treatment to dissolve pulp fibres under this low concentration state, afterwards the slurry of ferment treatment is carried out concentration；This
Plant treatment technology and can cause substantial amounts of water consumption, and need to expend extra energy that water is carried out during pulp concentration
Extrusion, not only causes the waste of water resource, and energy consumption is big, relatively costly；Additionally, under low dissolving pulp CONCENTRATION STATE, greatly
The presence of amount free water can affect cellulase and the combination effect of dissolving pulp fibres, and then reduces the effect effect of cellulase
Rate.
【Content of the invention】
The technical problem to be solved is to provide a kind of method improving dissolving pulpboard reactivity worth, is realizing
While improving dissolving pulpboard reactivity worth, not only avoid the waste of water resource, and reduce energy consumption, there is relatively low one-tenth
This.
The present invention is to solve above-mentioned technical problem by the following technical programs：A kind of raising dissolves pulpboard reactivity worth
Method, the method includes following concrete operation step：
(1), take the dissolving pulpboard of 0.05cm～0.50cm thickness, and control its moisture to be 2%～10%, standby；
(2), extracting cellulose enzyme prepares the cellulase solution that mass concentration is 5%～10%, and is adjusted using strong acid weak base salt
The pH value saving this cellulase solution, to 4.5～5.5, obtains stand-by cellulase solution；
(3), the dissolving pulpboard after processing through step (1) equably sprays stand-by cellulase solution and water successively, prepares
Reaction；
(4), afterwards dissolving pulpboard is placed in constant temperature and humidity interior to be reacted, the indoor temperature of constant temperature and humidity is 40～60
DEG C, the moisture that dissolves pulpboard after humidity and sprinkling process consistent.
Further, described step (2) cellulase is preferably endo cellulase.
Further, in described step (2), strong acid weak base salt is dibastic sodium phosphate, sodium dihydrogen phosphate, potassium hydrogen phosphate, di(2-ethylhexyl)phosphate
Any one in hydrogen potassium, sodium bicarbonate.
Further, in described step (3), the fountain height of stand-by cellulase solution is 0.1～10mg/g oven dry stock.
Further, the water content dissolving pulpboard after described step (3) process is 10%～50%.
Further, the raw material that described step (1) dissolves pulpboard is needlebush or leaf wood or bamboo pulp.
The beneficial effects of the present invention is：
By directly spraying cellulase solution on dissolving pulpboard, thus realizing just can showing under high dissolving pulp CONCENTRATION STATE
Write the reactivity worth improving dissolving pulpboard, solve the problems, such as the existing high water volume leading to because needing dilute, and then avoid
The required additional energy expending of subsequent concentration process；I.e. inventive process avoids the waste of water resource, reduce energy consumption and
There is relatively low cost.
【Specific embodiment】
A kind of method improving dissolving pulpboard reactivity worth of the present invention, the method includes following concrete operation step：
(1), take the dissolving pulpboard of 0.05cm～0.50cm thickness, and control its moisture to be 2%～10%, stand-by；
(2), extracting cellulose enzyme prepares the cellulase solution that mass concentration is 5%～10%, and is adjusted using strong acid weak base salt
The pH value saving this cellulase solution, to 4.5～5.5, obtains stand-by cellulase solution；
(3), stand-by cellulase solution and water are equably sprayed successively on the dissolving pulpboard after processing through step (1), accurate
Standby reaction；
(4), afterwards dissolving pulpboard is placed in constant temperature and humidity interior to be reacted, the indoor temperature of constant temperature and humidity is 40～60
DEG C, the moisture that dissolves pulpboard after humidity and sprinkling process consistent.
Wherein, the raw material that step (1) dissolves pulpboard is needlebush or leaf wood or bamboo pulp.Step (2) cellulase is excellent
Elect endo cellulase as；Strong acid weak base salt is dibastic sodium phosphate, sodium dihydrogen phosphate, potassium hydrogen phosphate, potassium dihydrogen phosphate, sodium bicarbonate
In any one.In step (3), the fountain height of stand-by cellulase solution is 0.1～10mg/g oven dry stock；Sprinkling is molten after processing
The water content of solution pulpboard is 10%～50%.In addition, it is necessary to the time reacted in explanation, step (4) arrives for several hours
In several weeks, determined generally according to required quality, quality requirement is higher, the response time is longer；And the percent in the present invention
It is mass percent in the case of no specified otherwise.
In order to preferably be described to the inventive method, applicant gives specific examples below.
Embodiment 1 improves the reactivity worth that Eucalyptus prehydrolysis sulfate dissolves pulpboard
The Eucalyptus prehydrolysis sulfate first taking 0.25cm thickness dissolves pulpboard, and controls its moisture to be 5%, stand-by；
Then take the cellulase solution that endo cellulase preparation mass concentration is 5%, and this cellulase is adjusted using potassium hydrogen phosphate
The pH value of liquid, to 4.8, obtains stand-by cellulase solution；Equably spray stand-by fiber successively on through stand-by dissolving pulpboard afterwards
Plain enzyme liquid and water, the fountain height of stand-by cellulase solution is 1mg/g oven dry stock, and after sprinkling process, the water content of dissolving pulpboard is
40% (i.e. dissolving pulp concentration is 60%), prepares reaction；Then by dissolving pulpboard be placed in thermostatic constant wet chamber (temperature be 45 DEG C, wet
Spend for 40%) in reacted, the response time be 24h.
Carry out reactivity worth survey to processing forward and backward Eucalyptus prehydrolysis sulfate dissolving pulpboard through the present embodiment operation respectively
Fixed it is known that, Eucalyptus prehydrolysis sulfate dissolves the reactivity worth of pulpboard and brings up to after process 76.44% from 45.22%.
Embodiment 2 improves the reactivity worth that Chinese hemlock spruce acid accumulator sulfite dissolves pulpboard
The Chinese hemlock spruce acid accumulator sulfite first taking 0.40cm thickness dissolves pulpboard, and controls its moisture to be 4%, stand-by；
Then take the cellulase solution that endo cellulase preparation mass concentration is 8%, and this cellulose is adjusted using potassium dihydrogen phosphate
The pH value of enzyme liquid, to 5.5, obtains stand-by cellulase solution；Equably spray stand-by fibre successively on through stand-by dissolving pulpboard afterwards
The plain enzyme liquid of dimension and water, the fountain height of stand-by cellulase solution is 0.01mg/g oven dry stock, and dissolves containing of pulpboard after sprinkling process
The water yield is 30% (i.e. dissolving pulp concentration is 70%), prepares reaction；Then (temperature is 50 dissolving pulpboard to be placed in thermostatic constant wet chamber
DEG C, humidity be 30%) in reacted, the response time be 2 weeks.
Carry out reactivity worth survey to processing forward and backward Chinese hemlock spruce acid accumulator sulfite dissolving pulpboard through the present embodiment operation respectively
Fixed it is known that, Chinese hemlock spruce acid accumulator sulfite dissolves the reactivity worth of pulpboard and brings up to after process 70.45% from 50.19%.
Embodiment 3 improves the reactivity worth that bamboo prehydrolysis sulfate dissolves pulpboard
The bamboo prehydrolysis sulfate first taking 0.10cm thickness dissolves pulpboard, and controls its moisture to be 8%, stand-by；Connect
The cellulase solution taking endo cellulase preparation mass concentration to be 10%, and this cellulase solution is adjusted using dibastic sodium phosphate
PH value to 5.0, obtain stand-by cellulase solution；Equably spray stand-by cellulose successively on through stand-by dissolving pulpboard afterwards
Enzyme liquid and water, the fountain height of stand-by cellulase solution is 8mg/g oven dry stock, and after sprinkling process, the water content of dissolving pulpboard is
20% (i.e. dissolving pulp concentration is 80%), prepares reaction；Then by dissolving pulpboard be placed in thermostatic constant wet chamber (temperature be 50 DEG C, wet
Spend for 20%) in reacted, the response time be 5h.
Carry out reactivity worth survey to processing forward and backward bamboo prehydrolysis sulfate dissolving pulpboard through the present embodiment operation respectively
Fixed it is known that, bamboo prehydrolysis sulfate dissolves the reactivity worth of pulpboard and brings up to after process 85.33% from 49.88%.
Embodiment 4 improves the reactivity worth that Pinus massoniana Lamb prehydrolysis sulfate dissolves pulpboard
The Pinus massoniana Lamb prehydrolysis sulfate first taking 0.30cm thickness dissolves pulpboard, and controls its moisture to be 5%, treats
With；Then take the cellulase solution that endo cellulase preparation mass concentration is 5%, and this cellulose is adjusted using sodium bicarbonate
The pH value of enzyme liquid, to 4.8, obtains stand-by cellulase solution；Equably spray stand-by fibre successively on through stand-by dissolving pulpboard afterwards
The plain enzyme liquid of dimension and water, the fountain height of stand-by cellulase solution is 2.5mg/g oven dry stock, and dissolves the aqueous of pulpboard after sprinkling process
Measure as 25% (i.e. dissolving pulp concentration is 75%), preparation reaction；Then (temperature is 55 dissolving pulpboard to be placed in thermostatic constant wet chamber
DEG C, humidity be 25%) in reacted, the response time be 72h.
Carry out reactivity worth to processing forward and backward Pinus massoniana Lamb prehydrolysis sulfate dissolving pulpboard through the present embodiment operation respectively
Measure it is known that, the reactivity worth that Pinus massoniana Lamb prehydrolysis sulfate dissolves pulpboard brings up to after process 89.78% from 54.61%.
Embodiment 5 improves the reactivity worth that Pinus massoniana Lamb prehydrolysis sulfate dissolves pulpboard
The Pinus massoniana Lamb prehydrolysis sulfate first taking 0.30cm thickness dissolves pulpboard, and controls its moisture to be 8%, treats
With；Then take the cellulase solution that endo cellulase preparation mass concentration is 5%, and this cellulose is adjusted using sodium bicarbonate
The pH value of enzyme liquid, to 5.1, obtains stand-by cellulase solution；Equably spray stand-by fibre successively on through stand-by dissolving pulpboard afterwards
The plain enzyme liquid of dimension and water, the fountain height of stand-by cellulase solution is 0.5mg/g oven dry stock, and dissolves the aqueous of pulpboard after sprinkling process
Measure as 15% (i.e. dissolving pulp concentration is 85%), preparation reaction；Then by dissolving pulpboard be placed in thermostatic constant wet chamber (temperature be 50C,
Humidity be 15%) in reacted, the response time be 4 weeks.
Carry out reactivity worth to processing forward and backward Pinus massoniana Lamb prehydrolysis sulfate dissolving pulpboard through the present embodiment operation respectively
Measure it is known that, the reactivity worth that Pinus massoniana Lamb prehydrolysis sulfate dissolves pulpboard brings up to after process 85.46% from 50.48%.
By the various embodiments described above, the inventive method can significantly effectively improve the reactivity worth of dissolving pulpboard,
And be by directly spraying cellulase solution on dissolving pulpboard in whole method operating process, thus realizing molten in high concentration
Just the reactivity worth of dissolving pulpboard can be improved under solution slurry (i.e. high dissolving pulp concentration) state, solve existing because needing dilute
The high water volume problem leading to, and then avoid the required additional energy expending of subsequent concentration process；I.e. the inventive method avoids
The waste of water resource, reduce energy consumption and there is relatively low cost.In addition, dissolving pulp proposed by the present invention is in high concentration shape
Tupe under state, can significantly lift adsorption efficiency on dissolving pulpboard for the cellulase and effect, be substantially not present trip
From the cellulase in aqueous medium, the production efficiency of dissolving pulpboard can be significantly improved under this binding mode, save dissolving pulp
The production cost of enterprise, the performance of lifting dissolving pulp product.
Claims (6)
1. a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：The method includes following concrete operation step：
(1), take the dissolving pulpboard of 0.05cm～0.50cm thickness, and control its moisture to be 2%～10%, stand-by；
(2), extracting cellulose enzyme prepares the cellulase solution that mass concentration is 5%～10%, and should using strong acid weak base salt regulation
The pH value of cellulase solution, to 4.5～5.5, obtains stand-by cellulase solution；
(3), equably spray stand-by cellulase solution and water successively on the dissolving pulpboard after processing through step (1), prepare anti-
Should；
(4), afterwards dissolving pulpboard is placed in constant temperature and humidity interior and is reacted, the indoor temperature of constant temperature and humidity is 40～60 DEG C,
Humidity is consistent with the moisture dissolving pulpboard after sprinkling process.
2. according to claim 1 a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：Described step (2)
Cellulase is endo cellulase.
3. according to claim 1 a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：Described step (2)
Middle strong acid weak base salt is dibastic sodium phosphate, sodium dihydrogen phosphate, potassium hydrogen phosphate, potassium dihydrogen phosphate, any one in sodium bicarbonate.
4. according to claim 1 a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：Described step (3)
In stand-by cellulase solution fountain height be 0.1～10mg/g oven dry stock.
5. according to claim 1 a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：Through described step
(3) water content dissolving pulpboard after processing is 10%～50%.
6. according to claim 1 a kind of improve dissolving pulpboard reactivity worth method it is characterised in that：Described step (1)
The raw material of dissolving pulpboard is needlebush or leaf wood or bamboo pulp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611004075.2A CN106381742B (en) | 2016-11-15 | 2016-11-15 | A method of improving dissolving pulpboard reactivity worth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611004075.2A CN106381742B (en) | 2016-11-15 | 2016-11-15 | A method of improving dissolving pulpboard reactivity worth |
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| CN106381742A true CN106381742A (en) | 2017-02-08 |
| CN106381742B CN106381742B (en) | 2018-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151931A (en) * | 2017-06-30 | 2017-09-12 | 陕西科技大学 | A kind of method that viscose rayon dissolving pulp reactivity worth is improved with heteropoly acid |
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|---|---|---|---|---|
| JPH06116887A (en) * | 1991-10-07 | 1994-04-26 | Nalco Chem Co | Method for improving water filtering property of paper pulp |
| CN101429733A (en) * | 2008-12-04 | 2009-05-13 | 余钢纲 | Bamboo wood dissolving pulp manufacturing process |
| CN101736637A (en) * | 2009-12-17 | 2010-06-16 | 宜宾长毅浆粕有限责任公司 | Production method for preparing bamboo dissolving pulp by utilizing natural-color unbleached bamboo pulp in a modifying way |
| CN103556517A (en) * | 2013-10-31 | 2014-02-05 | 昆明理工大学 | Method for improving oxygen-alkali pulping effect through laccase pretreatment |
| CN104452397A (en) * | 2014-11-21 | 2015-03-25 | 福建农林大学 | Method for improving reactive performance of prehydrolysis sulfate dissolving pulp |
-
2016
- 2016-11-15 CN CN201611004075.2A patent/CN106381742B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116887A (en) * | 1991-10-07 | 1994-04-26 | Nalco Chem Co | Method for improving water filtering property of paper pulp |
| CN101429733A (en) * | 2008-12-04 | 2009-05-13 | 余钢纲 | Bamboo wood dissolving pulp manufacturing process |
| CN101736637A (en) * | 2009-12-17 | 2010-06-16 | 宜宾长毅浆粕有限责任公司 | Production method for preparing bamboo dissolving pulp by utilizing natural-color unbleached bamboo pulp in a modifying way |
| CN103556517A (en) * | 2013-10-31 | 2014-02-05 | 昆明理工大学 | Method for improving oxygen-alkali pulping effect through laccase pretreatment |
| CN104452397A (en) * | 2014-11-21 | 2015-03-25 | 福建农林大学 | Method for improving reactive performance of prehydrolysis sulfate dissolving pulp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151931A (en) * | 2017-06-30 | 2017-09-12 | 陕西科技大学 | A kind of method that viscose rayon dissolving pulp reactivity worth is improved with heteropoly acid |
| 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 |
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| CN106381742B (en) | 2018-08-24 |
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