CN109162135A - A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood - Google Patents
A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood Download PDFInfo
- Publication number
- CN109162135A CN109162135A CN201811069362.0A CN201811069362A CN109162135A CN 109162135 A CN109162135 A CN 109162135A CN 201811069362 A CN201811069362 A CN 201811069362A CN 109162135 A CN109162135 A CN 109162135A
- Authority
- CN
- China
- Prior art keywords
- broad
- leaved wood
- xylo
- oligosaccharide
- dissolving pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
Abstract
The invention discloses a kind of methods using broad-leaved wood production dissolving pulp and xylo-oligosaccharide, and the mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；Broad-leaved wood is hydrolyzed the extracting of liquid；(3) hydrolyzate is successively obtained into xylo-oligosaccharide by decoloration, sun-anion exchange, vacuum evaporation, enzymatic hydrolysis, secondary decolourization, secondary sun-anion exchange, multiple-effect evaporation, single effect evaporation, crystallization；(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate and obtains dissolving pulp；Present invention coproduction xylo-oligosaccharide while using broad-leaved wood production dissolving pulp, improves raw material availability, reduces waste water generation, be suitable for industrialized production.
Description
Technical field
The present invention relates to dissolving pulp preparation technical field, more particularly to it is a kind of using broad-leaved wood production dissolving pulp with it is low
The method of xylan.
Background technique
The raw material of production dissolving pulp is mainly cotton linter, timber and bamboo, and the raw material that short fibre wood pulp uses is leaf wood, fine
Dimension is shorter, and generally 0.8-1.1 millimeters.It can be individually or with drift needle slurry with copying various text papers etc..
In production dissolving pulp, the hemicellulose in raw material must be removed, especially xylan, this is because they by cause compared with
High process chemical consumes and interferes viscose glue production process.
Papermaking enterprise is generally directly handled dissolving pulp prehydrolysis waste liquid feeding waste water treatment system at present, is not only made
At the waste of hemicellulose carbohydrate resources a large amount of in waste liquid, also causes wastewater treatment load to increase and increase with cost for wastewater treatment
It is high.Due to containing a large amount of xylans in leaf wood prehydrolysis waste liquid, the new raw material of xylooligosaccharides production can be used as
Source, with meet people to xylo-oligosaccharide demand increasingly increase and xylooligosaccharides production raw materials requirement amount is growing wants
It asks.But in the prior art during degradation of hemicellulose, it will usually which there are excessive degradations into xylose monomers, and reacted
The problems such as journey can generate a large amount of acid waste waters, and raw material availability is too low.
From industrial application angle, how broad-leaved wood to be utilized to produce dissolving pulp and xylo-oligosaccharide simultaneously, reach abundant
It is the technical problem to be solved in the present invention using the effect of resource.
Summary of the invention
The present invention provides a kind of utilization broad-leaved wood production dissolving pulp and oligomeric wood aiming at above-mentioned defect
The method of sugar.Present invention coproduction xylo-oligosaccharide while using broad-leaved wood production dissolving pulp, improves raw material availability, subtracts
Lack waste water generation, is suitable for industrialized production.
A kind of method and technology scheme for producing dissolving pulp and xylo-oligosaccharide using broad-leaved wood of the invention is, including following
Step:
(1) mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；
(2) extracting of liquid broad-leaved wood is hydrolyzed；
(3) by hydrolyzate successively by decoloration, sun-anion exchange, vacuum evaporation, enzymatic hydrolysis, secondary decolourization, secondary sun-
Anion exchange, evaporation obtain xylo-oligosaccharide；
(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate and obtains dissolving pulp；
In step (1), the weight ratio 1:2-10 of broad-leaved wood and water, sulfur dioxide intake is the 0.1%- of broad-leaved wood weight
3%。
In step (1), pH is 0.5-3.5 in continuous hydrolysis tower.
In step (2), extraction temperature in continuous hydrolysis tower is at 130 DEG C -200 DEG C, extraction times 30min-180min.
In step (3), the enzymatic hydrolysis is using inscribe beta-xylanase, circumscribed beta-xylanase, β-xylobiose glycosides enzyme and black
At least one of Xylanase from Aspergillus, it wait digest Xylanase activity in liquid is 200 that zytase enzyme dosage, which is every milliliter,
~500IU.
Step (3) is specifically, it is 2.8-3.2 that hydrolyzate, which is neutralized to pH with calcium carbonate, and then plus active carbon decoloring is to saturating
PH is adjusted to 5.0-6.0, conductivity is adjusted to 1000us/cm hereinafter, passing through vacuum by sun-anion exchange by light 65-70%
Hydrolyzate refractive power is concentrated into 20-23 by evaporation, and temperature adjustment is to 25 DEG C；Zytase is accessed in hydrolyzate, handles 3 at 45~60 DEG C
~6h, then with active carbon secondary decolourization to light transmission 80%, then with sun-anion exchange to conductivity 50us hereinafter, pH is 4.5-
5.5,90% or more light transmission, then multiple-effect evaporation to refractive power 55 continues single effect evaporation to refractive power 82, and then massecuite enters crystallizing tank,
Decrease temperature crystalline, massecuite gets rid of sugar to get xylo-oligosaccharide out.
Massecuite gets rid of sugar when being cooled to 32 DEG C.
In step (4), boiling, conditions of cooking are carried out to the broad-leaved wood solids after extracting hydrolyzate using sulfate process
It is as follows: to be 25-35%, steam by the sulphidity of effective alkali, effective alkali that broad-leaved wood oven-dry weight is the 18-22% in terms of NaOH
Boil temperature be 140-170 DEG C, broad-leaved wood solids and water quality ratio 1:3-1:5, digestion time 2-3h.
The invention has the benefit that present invention coproduction xylo-oligosaccharide while using broad-leaved wood production dissolving pulp,
Raw material availability is improved, reduces waste water generation, is suitable for industrialized production.
Adjustment of the present invention for process conditions can be improved cellulose and hemicellulose utilization rate in raw material, control
Enzymolysis process, avoids the excessive degradation of xylose, reduces the pollution of waste and acid waste water, and dissolving pulp with it is oligomeric
Xylose production can carry out simultaneously, improve production efficiency.
Specific embodiment:
For a better understanding of the present invention, below with specific example come the technical solution that the present invention will be described in detail, but it is of the invention
It is not limited thereto.
Embodiment 1
A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood, comprising the following steps:
(1) mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；It is wealthy
The weight ratio 1:6 of leaf timber and water, sulfur dioxide intake are the 1.5% of broad-leaved wood weight, and pH is 0.5- in continuous hydrolysis tower
3.5。
(2) extracting of liquid broad-leaved wood is hydrolyzed；Extraction temperature is at 160 DEG C, extraction times 100min.
(3) hydrolyzate is neutralized to pH with calcium carbonate is 2.8-3.2, and then plus active carbon decoloring is to light transmission 68%, is passed through
PH is adjusted to 5.5 by sun-anion exchange, and conductivity is adjusted to 1000us/cm hereinafter, by being evaporated in vacuo hydrolyzate refractive power
22 are concentrated into, temperature adjustment is to 25 DEG C；Zytase is accessed in hydrolyzate, 4h is handled at 50 DEG C, then uses active carbon secondary decolourization
To light transmission 80%, then with sun-anion exchange to conductivity 50us hereinafter, pH is 5,90% or more light transmission, then multiple-effect evaporation is extremely
Refractive power 55 continues single effect evaporation to refractive power 82, and then massecuite enters crystallizing tank, and decrease temperature crystalline, massecuite is got rid of out when being cooled to 32 DEG C
Sugar uses inscribe beta-xylanase, circumscribed beta-xylanase, β-xylobiose glycosides enzyme and black song to get xylo-oligosaccharide, the enzymatic hydrolysis
At least one of mould zytase, it wait digest Xylanase activity in liquid is 300IU that zytase enzyme dosage, which is every milliliter,.
It is 80.3% that xylan hydrolysis, which is converted to the conversion ratio of xylo-oligosaccharide, after enzymatic treatment, in hydrolyzate.This yield is phase
For the ratio of xylan contained in raw material.
(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate using sulfate process, conditions of cooking is as follows: base
In broad-leaved wood oven-dry weight is in terms of NaOH 20% effective alkali, the sulphidity of effective alkali is 30%, boiling temperature 160
DEG C, broad-leaved wood solids and water quality ratio 1:4, digestion time be that 2.5h obtains dissolving pulp.
Dissolving pulp yield is 39% based on original Eucalyptus piece, viscosity 500ml/g, hemi-cellulose content 3.50%, α-fibre
Tie up cellulose content 95.0%, Kappa number 0.75.
Embodiment 2
A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood, comprising the following steps:
(1) mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；It is wealthy
The weight ratio 1:10 of leaf timber and water, sulfur dioxide intake are the 3% of broad-leaved wood weight, and pH is 0.5- in continuous hydrolysis tower
3.5。
(2) extracting of liquid broad-leaved wood is hydrolyzed；Extraction temperature is at 200 DEG C, extraction times 180min.
(3) hydrolyzate is neutralized to pH with calcium carbonate is 3.0, and then plus active carbon decoloring is to light transmission 70%, passes through sun-yin
PH is adjusted to 6.0 by ion exchange, and conductivity is adjusted to 1000us/cm hereinafter, being concentrated into hydrolyzate refractive power by being evaporated in vacuo
23, temperature adjustment is to 25 DEG C；Zytase is accessed in hydrolyzate, 3h is handled at 60 DEG C, then with active carbon secondary decolourization to light transmission
80%, then with sun-anion exchange to conductivity 50us hereinafter, pH is 5.5,90% or more light transmission, then multiple-effect evaporation to refractive power
55, continue single effect evaporation to refractive power 82, then massecuite enters crystallizing tank, and decrease temperature crystalline, massecuite gets rid of sugar out when being cooled to 32 DEG C, i.e.,
Xylo-oligosaccharide is obtained, the enzymatic hydrolysis is poly- using inscribe beta-xylanase, circumscribed beta-xylanase, β-xylobiose glycosides enzyme and aspergillus niger wood
At least one of carbohydrase, it wait digest Xylanase activity in liquid is 500IU that zytase enzyme dosage, which is every milliliter,.
It is 78.6% that xylan hydrolysis, which is converted to the conversion ratio of xylo-oligosaccharide, after enzymatic treatment, in hydrolyzate.This yield is phase
For the ratio of xylan contained in raw material.
(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate using sulfate process, conditions of cooking is as follows: base
In broad-leaved wood oven-dry weight is in terms of NaOH 22% effective alkali, the sulphidity of effective alkali is 35%, boiling temperature 170
DEG C, broad-leaved wood solids and water quality ratio 1:5, digestion time be that 3h obtains dissolving pulp.
Dissolving pulp yield is 38% based on original Eucalyptus piece, viscosity 480ml/g, hemi-cellulose content 3.40%, α-fibre
Tie up cellulose content 94.6%, Kappa number 0.78.
Embodiment 3
A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood, comprising the following steps:
(1) mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；It is wealthy
The weight ratio 1:3 of leaf timber and water, sulfur dioxide intake are the 0.7% of broad-leaved wood weight, and pH is 0.5- in continuous hydrolysis tower
3.5。
(2) extracting of liquid broad-leaved wood is hydrolyzed；Extraction temperature is at 150 DEG C, extraction times 60min.
(3) hydrolyzate is neutralized to pH with calcium carbonate is 2.8, and then plus active carbon decoloring is to light transmission 65%, passes through sun-yin
PH is adjusted to 5.0 by ion exchange, and conductivity is adjusted to 1000us/cm hereinafter, being concentrated into hydrolyzate refractive power by being evaporated in vacuo
20, temperature adjustment is to 25 DEG C；Zytase is accessed in hydrolyzate, 6h is handled at 45 DEG C, then with active carbon secondary decolourization to light transmission
80%, then with sun-anion exchange to conductivity 50us hereinafter, pH is 4.5,90% or more light transmission, then multiple-effect evaporation to refractive power
55, continue single effect evaporation to refractive power 82, then massecuite enters crystallizing tank, and decrease temperature crystalline, massecuite gets rid of sugar out when being cooled to 32 DEG C, i.e.,
Xylo-oligosaccharide is obtained, the enzymatic hydrolysis is poly- using inscribe beta-xylanase, circumscribed beta-xylanase, β-xylobiose glycosides enzyme and aspergillus niger wood
At least one of carbohydrase, it wait digest Xylanase activity in liquid is 200IU that zytase enzyme dosage, which is every milliliter,.
It is 77.2% that xylan hydrolysis, which is converted to the conversion ratio of xylo-oligosaccharide, after enzymatic treatment, in hydrolyzate.This yield is phase
For the ratio of xylan contained in raw material.
(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate using sulfate process, conditions of cooking is as follows: base
In broad-leaved wood oven-dry weight is in terms of NaOH 18% effective alkali, the sulphidity of effective alkali is 25%, boiling temperature 140
DEG C, broad-leaved wood solids and water quality ratio 1:3, digestion time be that 2h obtains dissolving pulp.
Dissolving pulp yield is 37.6% based on original Eucalyptus piece, viscosity 440ml/g, hemi-cellulose content 3.30%, α-
Content of cellulose 94.3%, Kappa number 0.76.
Claims (8)
1. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide, which comprises the following steps:
(1) mixed liquor of broad-leaved wood and water is squeezed into continuous hydrolysis tower, is continually fed into sulfur dioxide in continuous hydrolysis tower；
(2) extracting of liquid broad-leaved wood is hydrolyzed；
(3) by hydrolyzate successively by decoloration, sun-anion exchange, vacuum evaporation, enzymatic hydrolysis, secondary decolourization, secondary sun-
Anion exchange, evaporation obtain xylo-oligosaccharide；
(4) boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate and obtains dissolving pulp.
2. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, in step (1), the weight ratio 1:2-10 of broad-leaved wood and water, sulfur dioxide intake is the 0.1%- of broad-leaved wood weight
3%。
3. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, in step (1), pH is 0.5-3.5 in continuous hydrolysis tower.
4. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, in step (2), extraction temperature in continuous hydrolysis tower is at 130 DEG C -200 DEG C, extraction times 30min-180min.
5. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, in step (3), the enzymatic hydrolysis uses inscribe beta-xylanase, circumscribed beta-xylanase, β-xylobiose glycosides enzyme and aspergillus niger
At least one of zytase, zytase enzyme dosage be every milliliter wait digest Xylanase activity in liquid be 200~
500IU。
6. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, step (3) is specifically, it is 2.8-3.2 that hydrolyzate, which is neutralized to pH with calcium carbonate, and then plus active carbon decoloring is to light transmission
PH is adjusted to 5.0-6.0, conductivity is adjusted to 1000us/cm hereinafter, steaming by vacuum by sun-anion exchange by 65-70%
Hydrolyzate refractive power is concentrated into 20-23 by hair, and temperature adjustment is to 25 DEG C；Zytase is accessed in hydrolyzate, at 45~60 DEG C handle 3~
6h, then with active carbon secondary decolourization to light transmission 80%, then with sun-anion exchange to conductivity 50us hereinafter, pH is 4.5-
5.5,90% or more light transmission, then multiple-effect evaporation to refractive power 55 continues single effect evaporation to refractive power 82, and then massecuite enters crystallizing tank,
Decrease temperature crystalline, massecuite gets rid of sugar to get xylo-oligosaccharide out.
7. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide, feature according to claim 6
It is, massecuite gets rid of sugar when being cooled to 32 DEG C.
8. a kind of method using broad-leaved wood production dissolving pulp and xylo-oligosaccharide according to claim 1, feature
It is, in step (4), boiling is carried out to the broad-leaved wood solids after extracting hydrolyzate using sulfate process, conditions of cooking is such as
Under: by broad-leaved wood oven-dry weight be the effective alkali of the 18-22% in terms of NaOH, effective alkali sulphidity be 25-35%, boiling
Temperature is 140-170 DEG C, broad-leaved wood solids and water quality ratio 1:3-1:5, digestion time 2-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069362.0A CN109162135A (en) | 2018-09-13 | 2018-09-13 | A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811069362.0A CN109162135A (en) | 2018-09-13 | 2018-09-13 | A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109162135A true CN109162135A (en) | 2019-01-08 |
Family
ID=64879186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811069362.0A Pending CN109162135A (en) | 2018-09-13 | 2018-09-13 | A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109162135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295510A (en) * | 2019-06-27 | 2019-10-01 | 大连工业大学 | A method of lignin crude product and liquid glucose are prepared using pulping and paper-making waste liquid |
| WO2023143310A1 (en) * | 2022-01-25 | 2023-08-03 | 齐鲁工业大学 | Method for isolating saccharides in pre-hydrolysates of hardwood pulping |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007048879A1 (en) * | 2005-10-28 | 2007-05-03 | Danisco A/S | Separation process |
| CN102257164A (en) * | 2008-10-21 | 2011-11-23 | 丹尼斯克有限公司 | Process of producing xylose and dissolving pulp |
| CN103725807A (en) * | 2014-01-17 | 2014-04-16 | 山东大学 | Enzymic method for preparing xylose by utilizing broadleaf wood dissolving pulp prehydrolysis waste liquor |
| CN103740787A (en) * | 2014-01-17 | 2014-04-23 | 山东大学 | Method for producing xylooligosaccharide by use of broadleaf wood dissolving pulp prehydrolysis waste liquid enzyme process |
-
2018
- 2018-09-13 CN CN201811069362.0A patent/CN109162135A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007048879A1 (en) * | 2005-10-28 | 2007-05-03 | Danisco A/S | Separation process |
| CN102257164A (en) * | 2008-10-21 | 2011-11-23 | 丹尼斯克有限公司 | Process of producing xylose and dissolving pulp |
| CN103725807A (en) * | 2014-01-17 | 2014-04-16 | 山东大学 | Enzymic method for preparing xylose by utilizing broadleaf wood dissolving pulp prehydrolysis waste liquor |
| CN103740787A (en) * | 2014-01-17 | 2014-04-23 | 山东大学 | Method for producing xylooligosaccharide by use of broadleaf wood dissolving pulp prehydrolysis waste liquid enzyme process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295510A (en) * | 2019-06-27 | 2019-10-01 | 大连工业大学 | A method of lignin crude product and liquid glucose are prepared using pulping and paper-making waste liquid |
| CN110295510B (en) * | 2019-06-27 | 2021-10-01 | 大连工业大学 | Method for preparing lignin crude product and sugar solution by using pulping and papermaking waste liquor |
| WO2023143310A1 (en) * | 2022-01-25 | 2023-08-03 | 齐鲁工业大学 | Method for isolating saccharides in pre-hydrolysates of hardwood pulping |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9139857B2 (en) | Stepwise enzymatic hydrolysis process for converting cellulose to glucose | |
| US20140024093A1 (en) | Process for the production of digested biomass useful for chemicals and biofuels | |
| CN102585247B (en) | A kind of method utilizing lignocellulose residue from enzymatic hydrolysis to prepare lignosulfonates | |
| WO2012088108A1 (en) | Process for the production of alcohols from biomass | |
| WO2012047832A2 (en) | Process for the production of alcohols from biomass | |
| CN109162135A (en) | A method of dissolving pulp and xylo-oligosaccharide are produced using broad-leaved wood | |
| CN101514529A (en) | Method for preparing bamboo dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| JP5165419B2 (en) | Bioethanol production system using lignocellulose as a raw material | |
| CN101497894B (en) | Method for preparing ethanol from wood fiber raw material | |
| WO2016201031A1 (en) | Hydrothermal-mechanical treatment of lignocellulosic biomass for production of fermentation products | |
| CN109403115A (en) | A method of vinegar-grade dissolving pulp is produced using poplar slab | |
| CN112522985B (en) | Micro-chemical pulping of agricultural straw and full-component refining method of biomass | |
| CN101701428A (en) | Method for preparing furfural by preprocessing grass fiber papermaking raw material and related comprehensive utilization method thereof | |
| Kautto et al. | Effects of integrating a bioethanol production process to a kraft pulp mill | |
| CN101514530A (en) | Method for preparing bagasse dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| Cui et al. | Effect of cellobiase and surfactant supplementation on the enzymatic hydrolysis of pretreated wheat straw | |
| Wu et al. | Production of dissolving pulp from Eulaliopsis binata with the concept of integrated biorefinery | |
| CN101497895B (en) | Method for preparing ethanol from wood fiber raw material | |
| Gao et al. | Production of xylooligosaccharides and monosaccharides from switchgrass by FeCl3 hydrolysis combined with sodium perborate pretreatment | |
| CN1062939A (en) | Cornstalk is made man-made fiber pulp, xylitol method | |
| CN103031340A (en) | Method for producing ethanol by using wood fiber raw material | |
| CN103031339B (en) | Method for producing ethanol by wood fiber raw material | |
| Ma et al. | Comparison of single-stage and two-stage hydrothermal pretreatments for improving hemicellulose separation from bamboo chips | |
| Li et al. | Recent progress on the pretreatment and fractionation of lignocelluloses for biorefinery at QIBEBT | |
| CN1160768A (en) | Concurrent xylose, glucose, oxalic acid, lignin and cellulose-producing pollutionless process with straw as material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190108 |
|
| RJ01 | Rejection of invention patent application after publication |