CN106436420B - A kind of activator and preparation method thereof for producing dissolving pulp - Google Patents
A kind of activator and preparation method thereof for producing dissolving pulp Download PDFInfo
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- CN106436420B CN106436420B CN201610944991.8A CN201610944991A CN106436420B CN 106436420 B CN106436420 B CN 106436420B CN 201610944991 A CN201610944991 A CN 201610944991A CN 106436420 B CN106436420 B CN 106436420B
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- activator
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- dissolving pulp
- alkali
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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
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
-
- 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
- D21C9/001—Modification of pulp properties
-
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention discloses a kind of activators and preparation method thereof for producing dissolving pulp, the activator is by weight, including raw material below: 200-400 parts of alkyl polyglycoside, 100-200 parts of zytase, 0-20 parts of alkali, 30-60 parts of glycerol, sodium chloride 10-30, sucrose 10-30,260-650 parts of water.The activator had not only improved the reactivity worth of dissolving pulp, but also reduced production cost；Activator of the invention simultaneously is nontoxic, harmless, is a kind of environmentally protective product, meets the requirement of slurrying enterprise clean production.
Description
Technical field
The present invention relates to a kind of activator and preparation method thereof for producing dissolving pulp, belongs to and utilize timber and non-timber
The technical field of plant fiber material production dissolving pulp.
Background technique
Dissolving pulp is the high-purity obtained with fibrous raw materials such as cotton/cotton linter, timber, bamboos through acid system or soda pulping process
Cellulose carrier, fiber content are up to 90-99%, contain only a small amount of hemicellulose and micro lignin, extract and mine
Substance is the main of manufacture viscose fiber, glassine paper, acetate fiber, nitrocellulose, carboxymethyl cellulose, microcrystalline cellulose etc.
Raw material.In recent years, with the continuous improvement of economic fast development and living standards of the people, for dissolving pulp demand not yet
It is disconnected to increase.Global dissolving pulp production capacity also rapid growth.At the same time, fierce market competition promotes the producer constantly to reinforce to molten
The attention of solution slurry quality, other than obtaining cellulose purity required by end product as far as possible, downstream industry is to dissolving pulp
Quality requirements step up, and most important one is exactly the reactivity worth of dissolving pulp.
The reactivity worth of dissolving pulp can be understood as the ability that slurry reacts with all reactants, depend primarily on fiber
The accessibility of element.Since the most dissolving pulp in the whole world all produces viscose fiber using the viscose technique based on sulfonating reaction, because
The reactivity worth of this dissolving pulp usually refers in particular to dissolving pulp to the majority fibers solvent in viscose technique --- the reaction of carbon disulfide
Ability, specifically, referring to that 3 hydroxyls on each glucose unit of cellulose molecular chain by carbon disulfide sulfonation, are formed
The ability of cellulose xanthate.
Cellulosic molecule in natural plant fibre is in limited accessible state, in the situation that sulfonating conditions are fixed
Under, the reactivity worth of dissolving pulp depends primarily on the accessibility of cellulose itself.The influence factor for influencing cellulose accessibility has
Pulp chemical constituent, fibre morphology, gap structure and molecular structure of cellulose etc..Empirical evidence, reactivity worth are excellent
Dissolving pulp must be that the fibre fractionation of even molecular weight distribution, the degree of polymerization less than 200 and greater than 1200 should reduce to the greatest extent, and a- is fine
It is few to tie up cellulose content height, hemicellulose level.
Currently, using timber or culled wood plant fiber production dissolving pulp, there are mainly two types of methods: prehydrolysis-sulfate method
And acid sulfite process.Due to prehydrolysis-sulfate method dissolving pulp kind produced, content of alphacellulose is high, synthesis
The advantages of sulfate process and acid sulfite process, therefore, it is main at present using and the production of prehydrolysis-sulfate method it is molten
Solution slurry.Prehydrolysis-sulfate method boiling includes two links of prehydrolysis and sulphate cook, and prehydrolysis has sour prehydrolysis process, water
Three kinds of modes of prehydrolysis process and steam Hydrolyze method.The main function of prehydrolysis is the content for reducing hemicellulose in raw material, is changed
Its structure improves a- content of cellulose in slurry, improves the reactivity worth of slurry, in acid condition, destroys the nascent of fiber
Wall, and split away off primary wall in pulping process, rich cellulose-containing secondary wall is exposed, to improve the anti-of slurry
Should be able to power, control the degree of polymerization of slurry.
In actual production, in order to improve the accessibility of dissolving pulp and improve reactivity worth, in pre-hydrolysis process usually
Need to reduce the content of hemicellulose as far as possible, but this viscosity that will cause pulp reduces, pulp yield decline, alkali consumption increases, instead
Come over and affect the reactivity worth of dissolving pulp, while increasing cost.
In order to guarantee that pulp viscosity index, simultaneous reactions performance reach standard, many companies are living using some conventional surfaces
Property agent, the surfactant of phenol is just improved dissolving pulp accessibility characteristic, is used to use as pulp activator, but benzene
Phenols surfactant is toxic, has adverse effect to human respiratory and liver, kidney, and be difficult to degrade, and being used for a long time can be dirty
Contaminate water body and soil.And in terms of technical standpoint, the use of such surfactant can not make to wad a quilt with cotton again to gather in fiber peripheral
Hemicellulose dissolution, increase fiber impurity.
Summary of the invention
When producing dissolving pulp, activator is not used, the viscosity that will cause pulp reduces, and pulp yield decline, alkali consumption increases,
The problems such as higher cost；Traditional activator is more toxic, and can generation environment pollution；The present invention in view of the above technical problems,
A kind of new activator for being used to produce dissolving pulp is provided, asepsis environment-protecting can reduce alkali charge with pulp yield, and reduction is produced into
This.
The technical scheme is that provide it is a kind of for producing the activator of dissolving pulp, by weight, including below
Raw material: 200-400 parts of alkyl polyglycoside, 100-200 parts of zytase, 0-20 parts of alkali, 30-60 parts of glycerol, sodium chloride 10-30,
260-650 parts of sucrose 10-30, water.These components synergistic effect, first alkyl polyglycoside improve fiber accessibility, zytase
The lignin and hemicellulose wadded a quilt with cotton gather in fiber peripheral again are decomposed, sucrose, glycerol increase the stability of zytase, and alkali is adjusted
The pH value of this activator product, sodium chloride adjust the stability of this product in aqueous solution, increase the validity period of this product and deposit
Put the phase.
Preferably, the alkyl polyglycoside is one or more of APG0810, APG0814, APG1214 combination, preferably
APG1214。
Preferably, the zytase be one of food-grade Solid Xylanase, food grade liquid xylanase or
Two kinds of combinations, preferably food-grade Solid Xylanase.
Preferably, the alkali is the combination of one or both of sodium hydroxide, potassium hydroxide, preferably sodium hydroxide.
The present invention further provides a kind of methods for preparing above-mentioned activator, comprising the following steps:
1) by the parts by weight of the raw material of activator, water, glycerol, sodium chloride and sucrose are mixed, stirring to whole dissolutions；This
Sample is initially formed stable mother liquor, to guarantee the bioactivity for the zytase being added in next step.
2) add zytase, stir to whole dissolutions, zytase is uniformly mixed with mother liquor, guarantee its performance not by
It influences, alkali is then added, adjust its pH value and guarantee xylanase activity to 7.5-9, and guarantee that this product each component is most preferably assisted
Same-action, while it is unaffected to guarantee that client adds equipment when in use.
3) it is eventually adding alkyl polyglycoside, stirring to whole dissolutions, discharging obtains activator, the addition of alkyl polyglycoside
The accessibility of solution is improved, and final stage is added and guarantees synergy between component, rather than its function that offsets each other.
Technical principle of the invention is: in prehydrolysis and digestion process, many hemicelluloses, lignin small molecule can be again
Wadding gather around pulp fibers, influence the accessibility of fiber so that medical fluid can not with fiber contacts, pulp reactivity worth substantially under
It drops and loses reactivity worth.Activator of the invention is first the surface tension for reducing medical fluid, so that medical fluid is rapidly achieved fiber sudden and violent
The surface of dew, and zytase dissolves out rapidly the hemicellulose and lignin small molecule and other impurities wadded a quilt with cotton and gathered in fiber surface,
To increase the purity of fiber in pulp, it is fully exposed to fiber in reaction medical fluid, increases the reactivity worth of fiber.
The beneficial effects of the present invention are: add activator of the present invention in pre-hydrolysis process, alkyl polyglycoside first adds
Enter, reduce the surface tension of solid-liquid interface, increases medical fluid in the spreadability of the surface of solids, reinforce infiltration of the medical fluid in wood chip
Effect thoroughly, is also beneficial to zytase and touches fiber molecule chain, secondly under the synergistic effect of zytase and medical fluid, can increase
Add to hemicellulose removal ability in pulp, while also increasing after prehydrolysis wadding again and gathering in the hemicellulose of fiber peripheral and wooden
Plain fragment, thus under the premise of reaching same hemicellulose and delignification requires, the viscosity increase of dissolving pulp, pulp yield
It improves, alkali consumption decline, had finally not only improved the reactivity worth of dissolving pulp, but also reduce production cost.Work of the invention simultaneously
Agent is nontoxic, harmless, is a kind of environmentally protective product, meets the requirement of slurrying enterprise clean production.
Specific embodiment
Below with reference to embodiment, the invention will be further described, it should be understood that these embodiments are only used for illustration
Purpose, be never limited in protection scope of the present invention.
Embodiment 1
The preparation of activator 1
300kg water, 40kg glycerol, 15kg sodium chloride and 15kg sucrose, stirring to whole dissolutions are added in a kettle；So
120kg Solid Xylanase is added into reaction kettle again afterwards, then 10kg sodium hydroxide is added in stirring to whole dissolutions；Finally
250kg alkyl polyglycoside APG0810, stirring to whole dissolutions, discharging is added.
Embodiment 2
The preparation of activator 2
350kg water, 50kg glycerol, 20kg sodium chloride and 20kg sucrose, stirring to whole dissolutions are added in a kettle；So
130kg Solid Xylanase is added into reaction kettle again afterwards, then 10kg potassium hydroxide is added in stirring to whole dissolutions；Finally
300kg alkyl polyglycoside APG0814, stirring to whole dissolutions, discharging is added.
Embodiment 3
The preparation of activator 3
400kg water, 55kg glycerol, 23kg sodium chloride and 24kg sucrose, stirring to whole dissolutions are added in a kettle；So
150kg liquid xylanase is added into reaction kettle again afterwards, then 15kg sodium hydroxide is added in stirring to whole dissolutions；Finally
320kg alkyl polyglycoside APG1214, stirring to whole dissolutions, discharging is added.
Embodiment 4
The preparation of activator 4
600kg water, 58kg glycerol, 26kg sodium chloride and 29kg sucrose, stirring to whole dissolutions are added in a kettle；So
180kg liquid xylanase is added into reaction kettle again afterwards, then 17kg potassium hydroxide is added in stirring to whole dissolutions；Finally
380kg alkyl polyglycoside APG1214, stirring to whole dissolutions, discharging is added.
Application examples
Poplar piece 1500kg is added in rotation prehydrolysis device, 3480kg prehydrolysis medical fluid is added, adds 0.2% respectively
Above-described embodiment 1-4 activator of (being directed to wood chip weight), prehydrolysis heat up 90 minutes, keep the temperature 90 minutes at 165 degree, prehydrolysis
Steam bleeding pours out wood chip afterwards, and wet wood chip is put into rotation boiling vessel and carries out sulphate cook after prehydrolysis.Wet wood chip 1500kg is added
The NaOH aqueous solution 390kg of concentration 8mol/L, concentration are the Na of 1mol/L2S aqueous solution 152kg, water 970kg, anthraquinone 1.2kg.
Boiling heats up 90 minutes, keeps the temperature 90 minutes at 160 degree, steam bleeding is poured out, rinses, discongests and screened after boiling, obtains brown stock.
Reference examples 1
Poplar piece 1500kg is added in rotation prehydrolysis device, 3480kg prehydrolysis medical fluid is added, prehydrolysis heats up 90 points
Clock keeps the temperature 90 minutes at 165 degree, and steam bleeding pours out wood chip after prehydrolysis, and wet wood chip is put into rotation boiling vessel and carries out after prehydrolysis
Sulphate cook.Wet wood chip 1500kg, is added the NaOH aqueous solution 400kg of concentration 8mol/L, and concentration is the Na of 1mol/L2S water
Solution 152kg, water 970kg, anthraquinone 1.2kg.Boiling heat up 90 minutes, 160 degree heat preservation 90 minutes, after boiling steam bleeding pour out,
It rinses, discongest and screens, obtain brown stock.
Reference examples 2
Poplar piece 1500kg is added in rotation prehydrolysis device, 3480kg prehydrolysis medical fluid is added, addition 0.2% (is directed to
Wood chip weight) phenol polyoxyethylene ether, prehydrolysis heat up 90 minutes, 165 degree heat preservation 90 minutes, steam bleeding is poured out after prehydrolysis
Wood chip, wet wood chip is put into rotation boiling vessel and carries out sulphate cook after prehydrolysis.Concentration 8mol/L is added in wet wood chip 1500kg
NaOH aqueous solution 390kg, concentration be 1mol/L Na2S aqueous solution 152kg, water 970kg, anthraquinone 1.2kg.Boiling heating 90
Minute, 90 minutes are kept the temperature at 160 degree, steam bleeding is poured out, rinses, discongests and screened after boiling, obtains brown stock.
Testing result is shown in Table 1:
| Number | Alkali charge, % | Kappa number | Pentose content, % | Brown stock viscosity, cp | Pulp yield, % |
| Reference examples 1 | 21.3 | 16.98 | 2.68 | 495 | 36.51 |
| Reference examples 2 | 20.8 | 17.25 | 2.63 | 520 | 36.87 |
| Embodiment 1 | 20.8 | 16.86 | 2.58 | 535 | 37.05 |
| Embodiment 2 | 20.8 | 16.52 | 2.58 | 563 | 37.13 |
| Embodiment 3 | 20.8 | 15.83 | 2.43 | 587 | 37.34 |
| Embodiment 4 | 20.8 | 15.97 | 2.51 | 572 | 37.22 |
As can be seen from Table 1,0.2% activator of the present invention is added compared with activator is not added, delignification and half
Fiber level is substantially suitable, and brown stock viscosity increases to 535cp-587cp from 495cp, but alkali charge drops to from 21.3%
20.8%, reduce 0.5%, while pulp yield increases to 37.05%-37.34%, increasing degree 0.54- from 36.51%
0.83%.Cost accounting the result shows that, slurry per ton can save 29-38 member.
0.2% activator of the present invention is added compared with phenol polyoxyethylene ether is added, (is all in the case that alkali charge is the same
20.8%), delignification will be got well, and Kappa number drops to 15.97-16.86 from 17.25, it is substantially suitable take off hemicellulose level, but do not float
Slurry viscosity increases to 535cp-587cp from 520cp, while pulp yield increases to 37.05%-37.34% from 36.87%, increases
Amplitude 0.18-0.47%.Cost accounting the result shows that, slurry per ton can save 10-25 member.
Examples are merely exemplary for the above, and it is not intended to limit the scope of the present invention in any way.Art technology
Personnel should be understood that without departing from the spirit and scope of the invention can details and form to technical solution of the present invention
It modifies or replaces, but these modifications and replacement are fallen within the protection scope of the present invention.
Claims (5)
1. application of the activator in production dissolving pulp, by weight, the activator is made of raw material below: alkyl polysaccharide
200-400 parts of glycosides, 100-200 parts of zytase, 0-20 parts of alkali, 30-60 parts of glycerol, sodium chloride 10-30, sucrose 10-30, water
260-650 parts；The activator is added in pre-hydrolysis process；
The preparation method of activator the following steps are included:
1) by the parts by weight of the raw material of activator, water, glycerol, sodium chloride and sucrose are mixed, stirring to whole dissolutions；
2) zytase is added, stirs to whole dissolutions, alkali is then added；
3) it is eventually adding alkyl polyglycoside, stirring to whole dissolutions, discharging obtains activator.
2. application as described in claim 1, which is characterized in that the alkyl polyglycoside be APG0810, APG0814,
One or more of APG1214 combination.
3. application as described in claim 1, which is characterized in that the zytase is food-grade Solid Xylanase, food
The combination of one or both of grade liquid xylanase.
4. application as described in claim 1, which is characterized in that the alkali is one of sodium hydroxide, potassium hydroxide or two
Kind combination.
5. application as described in claim 1, which is characterized in that in step 2, alkali is added and adjusts pH value to 7.5-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610944991.8A CN106436420B (en) | 2016-11-02 | 2016-11-02 | A kind of activator and preparation method thereof for producing dissolving pulp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610944991.8A CN106436420B (en) | 2016-11-02 | 2016-11-02 | A kind of activator and preparation method thereof for producing dissolving pulp |
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| Publication Number | Publication Date |
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| CN106436420A CN106436420A (en) | 2017-02-22 |
| CN106436420B true CN106436420B (en) | 2019-02-22 |
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| CN101338333A (en) * | 2008-08-12 | 2009-01-07 | 南京林业大学 | Method for conversing agricultural and forest residues to be fermentable sugars |
| CN101649258A (en) * | 2009-08-31 | 2010-02-17 | 广州立白企业集团有限公司 | Tableware detergent with enzyme and preparation method thereof |
| US10023995B2 (en) * | 2012-05-28 | 2018-07-17 | Södra Cell Aktiebolag Ab | Process and a dissolving pulp manufactured by the process |
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Address after: 410205 Hunan province Changsha high tech Development Zone, Lu Lu Tin Road No. 8 Valley Oak Park 8 Building 101, No. 402, 104A Patentee after: HUNAN WISE FOUND ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 410205 Hunan province Changsha high tech Development Zone, Lu Lu Tin Road No. 8 Valley Oak Park 8 Building 101, No. 402, 104A Patentee before: HUNAN BAILIN BIOTECHNOLOGY Co.,Ltd. |