CN108892784A - A kind of method of purification of environmentally protective enzymolysis xylogen - Google Patents
A kind of method of purification of environmentally protective enzymolysis xylogen Download PDFInfo
- Publication number
- CN108892784A CN108892784A CN201810546490.3A CN201810546490A CN108892784A CN 108892784 A CN108892784 A CN 108892784A CN 201810546490 A CN201810546490 A CN 201810546490A CN 108892784 A CN108892784 A CN 108892784A
- Authority
- CN
- China
- Prior art keywords
- enzymolysis xylogen
- purification
- environmentally protective
- water
- acid
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Compounds Of Unknown Constitution (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention belongs to enzymolysis xylogen technical fields, disclose a kind of method of purification of environmentally protective enzymolysis xylogen.The method of the present invention includes the following steps：Enzymolysis xylogen is added in aromatic sulphonic acid solution, insulated and stirred；A is filtered, filtrate is collected；Water is added in filtrate, filters B, residue washing, drying, the enzymolysis xylogen purified.Method of purification of the present invention has many advantages, such as that extraction production stage is few, price is low, pollution is few, the generation without a large amount of inorganic salts waste water is a kind of method of purification of clean and environmental protection compared with acid-precipitation method, alkaline process, flocculent precipitation；Aromatic sulphonic acid recycling is convenient, reusable, and service efficiency is high, and at low cost, environmental pollution is few, can large-scale commercial applications application.The method of the present invention will be helpful to reduce paper-making pulping industry to the pollution of environment and promote the utilization of renewable resource, reduce the discharge of waste water and waste liquid during lignin extraction, and then to chemical industry greenization is promoted, and have important practical significance and social effect.
Description
Technical field
The invention belongs to enzymolysis xylogen technical field, in particular to a kind of purification side of environmentally protective enzymolysis xylogen
Method.
Background technique
Lignin universally present in higher plant, being the second natural polymer abundant in nature,
Content is only second to cellulose.Whole world plant is every year since photosynthesis generates about 150,000,000,000 tons of lignin.But at present only
There is the lignin no more than 5% to be recycled, and the overwhelming majority is all incinerated or abandons, this not only wastes a large amount of preciousnesses
Resource, also seriously polluted environment.There is very important science and society to the research of this renewable resource of lignin
It can economic significance.
Lignin in plant has extremely complex structure, while being tightly combined with other compositions, therefore at present can not
Separation obtains the lignin that structure is not destroyed.The extracting method of lignin is broadly divided into acid-precipitation method, alkali analysis method, sulfurous acid at present
Salt method, flocculent precipitation etc..Acid-precipitation method it is at high cost, a large amount of inorganic salts waste water can be generated, not environmentally and lignin structure is broken
It is bad serious.Alkali analysis method is although cheap, but the lignin structure purified destroys seriously and purity is lower.Sulphite process is received
Rate is low, at high cost, and lignin molecule structure is seriously damaged, and can also bring serious environmental pollution.Flocculent precipitation：It makes
Paper black liquor has the property of colloid under certain conditions, and particle usually has negative electrical charge, therefore cationic suction can be added
Attached dose is destroyed the stability of colloid electrically neutralize, and then is lignin flocculation sedimentation.Although being not necessarily to acid-resistant system,
Temperature requirement is higher.Therefore finding one kind easy to operate, good separating effect, environmental-friendly enzymolysis xylogen extracting method is urgently
Problem to be solved.
Aqueous solutions of organic acids can make the enhanced dissolution rate of hemicellulose, so that the dissolution rate of lignin be made to improve.It is organic
Acid can easily provide proton in aqueous solution and react the glycosidic bond, ehter bond and the ester that destroy in lignin with catalyzing hydrolysisization
Key.The oleophylic nonpolar moiety of organic acid can be stacked by π-π or hydrophobic interaction shields lignin and forms micellelike
Aggregation, prevents reassociating for lignin, and hydrophilic end part outwardly water, realizes effective dissolution of lignin.And
Under low concentration, organic acid is not enough to enzymolysis xylogen to coat, and enzymolysis xylogen contacts extensively with water, so that solubility be caused to drop
Low, enzymolysis xylogen is precipitated.Organic acid recovery simultaneously is simple, at low cost, and reaction condition is mild, is a kind of environmental-friendly, green
The extracting method of environmental protection.Therefore it can control the concentration of organic acid to purify enzymolysis xylogen.And with fragrant organic acid in low temperature
Under low pressure extract enzymolysis xylogen method at present and have not been reported.
Summary of the invention
In order to overcome the disadvantage and deficiency that above-mentioned existing enzymolysis xylogen extraction operation condition is harsh, cost recovery is high, this
The primary and foremost purpose of invention is to provide a kind of method of purification of environmentally protective enzymolysis xylogen.The Product recycling of the method for the present invention
Cheaply, easy to operate, good separating effect, and wastewater flow rate is few, and the feature of environmental protection is good, is suitble to large-scale commercial applications application, makes lignin
Application range is more extensive.
The purpose of the present invention is realized by following proposal：
A kind of method of purification of environmentally protective enzymolysis xylogen, includes the following steps：
Enzymolysis xylogen is added in aromatic sulphonic acid solution, insulated and stirred；A is filtered, filtrate is collected；Water is added in filtrate,
Filter B, residue washing, drying, the enzymolysis xylogen purified.
The aromatic sulphonic acid can for benzene sulfonic acid, p-methyl benzenesulfonic acid, m-toluene sulfonic acid, to ethylbenzenesulfonic acid and to hydroxyl sulfoacid
At least one of.
Enzymolysis xylogen used and the mass ratio of aromatic sulphonic acid are preferably 10:30~10:85.
The concentration of the aromatic sulphonic acid solution is preferably 30~85wt%.
The dosage that water is added is to add the concentration of aromatic sulphonic acid solution after water for 11.5% or less.
It is preferably sufficiently stirred after the addition water, lignin is precipitated.
The temperature of the heat preservation is preferably 25~50 DEG C.
Before the filtering A filtering, water diluted system can be added more efficiently to filter, add the amount of water to add fragrance after water
The concentration of sulfonic acid solutions is 20% or more；To prevent lignin to be precipitated, separating effect is influenced.
The speed of the stirring is preferably 200~300rpm.
The time of the stirring is preferably 5~40min.More preferably stirring to thick enzymolysis xylogen is completely dissolved.
The filtering, which is both preferably, to be filtered.
Water can be used to be washed for the washing.
In the present invention, the enzymolysis xylogen can be corncob enzymolysis xylogen, corn stover enzymolysis xylogen, straw
Enzymolysis xylogen, Sunflower Stalk enzymolysis xylogen, more nandina enzymolysis xylogen, Guangxi bambusa texlitis enzymolysis xylogen and wheat straw enzymatic hydrolysis
At least one of lignin.
It can be repeated in method of purification after filtering the concentrating filter liquor that B is obtained in the method for the present invention.
Method of purification of the present invention compared with acid-precipitation method, alkaline process, flocculent precipitation, have extract production stage it is few, price is low,
The advantages that pollution is few, is a kind of method of purification of clean and environmental protection.The method of the present invention will be helpful to reduce paper-making pulping industry to ring
The pollution in border and the utilization for promoting renewable resource reduce the discharge of waste water and waste liquid during lignin extraction, and then to promotion
Chemical industry greenization, has important practical significance and social effect.
The present invention compared with the existing technology, has the following advantages and beneficial effect：
(1) compared with acid-precipitation method, the method for the present invention technique is environmentally protective, the generation without a large amount of inorganic salts waste water.
(2) reagent aromatic sulphonic acid of the invention recycles convenient, reusable, and service efficiency is high, at low cost, to environment dirt
Dye is few, can large-scale commercial applications application.
(3) dissolution and precipitation of lignin can be realized in the concentration that first passage of the present invention adjusts aromatic sulphonic acid, convenient fast
Victory, technique have stronger creativeness.
Detailed description of the invention
Fig. 1 is the infrared spectrogram that 1 product of embodiment and acid-precipitation method purify corncob enzymolysis xylogen.
Fig. 2 is the ultraviolet spectrogram that 1 product of embodiment and acid-precipitation method purify corncob enzymolysis xylogen.
Fig. 3 is the hydrogen nuclear magnetic resonance spectrogram that 1 product of embodiment and acid-precipitation method purify corncob enzymolysis xylogen.
Fig. 4 is the grain size distribution that 1 product of embodiment and acid-precipitation method purify corncob enzymolysis xylogen.
Fig. 5 is the Zeta potential figure that 1 product of embodiment and acid-precipitation method purify corncob enzymolysis xylogen.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Material involved in the following example can be obtained from commercial channel.
Embodiment 1
It prepares the p-methyl benzenesulfonic acid solution that 100g mass concentration is 80% and is heated to 25 DEG C, be completely melt it, by 10g
Thick corncob enzymolysis xylogen solid powder is added in the p-methyl benzenesulfonic acid solution of above method preparation, the solution 25 DEG C with
The speed stirring of 200~300r/min heat preservation 20 minutes makes in corncob enzymolysis xylogen dissolution p-methyl benzenesulfonic acid solution.It is added
Water makes p-methyl benzenesulfonic acid solution concentration 45%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.It is past again to be somebody's turn to do
Filtrate be added water, make p-methyl benzenesulfonic acid solution concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collect filter residue,
Filter residue is finally washed till neutrality with water, after dry, the corncob enzymolysis xylogen of purification is made.
Embodiment 2
It prepares the benzene sulfonic acid solution that 100g mass concentration is 75% and is heated to 45 DEG C, be completely melt it, 10g is slightly beautiful
Rice core enzymolysis xylogen solid powder is added in the benzene sulfonic acid solution of above method preparation, the solution at 45 DEG C with 200~
The speed stirring of 300r/min heat preservation 40 minutes, is dissolved in corncob enzymolysis xylogen in benzene sulfonic acid solution.Water, which is added, makes benzene
Sulfonic acid solutions concentration is 35%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.Water is added toward the filtrate again,
Make its concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collect filter residue, filter residue is finally washed till neutrality with water,
After drying, the corncob enzymolysis xylogen of purification is made.
Embodiment 3
It prepares the m-toluene sulfonic acid solution that 100g mass concentration is 80% and is heated to 40 DEG C, be completely melt it, by 10g
Thick corncob enzymolysis xylogen solid powder is added in the m-toluene sulfonic acid solution of above method preparation, the solution at 40 DEG C
With speed stirring heat preservation 25 minutes of 200~300r/min, it is dissolved in corncob enzymolysis xylogen in m-toluene sulfonic acid solution.
Water, which is added, makes m-toluene sulfonic acid solution concentration 35%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.Again
Toward the filtrate be added water, make its concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collect filter residue, finally use water
Filter residue is washed till neutrality, after dry, the corncob enzymolysis xylogen of purification is made.
Embodiment 4
Prepare 100g mass concentration be 85% to ethylbenzenesulfonic acid solution and be heated to 45 DEG C, be completely melt it, by 10g
Thick corncob enzymolysis xylogen solid powder be added above method preparation in ethylbenzenesulfonic acid solution, the solution at 45 DEG C
With speed stirring heat preservation 35 minutes of 200~300r/min, it is dissolved in corncob enzymolysis xylogen in ethylbenzenesulfonic acid solution.
Water, which is added, to be made to ethylbenzenesulfonic acid solution concentration 55%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.Again
Toward the filtrate be added water, make its concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collect filter residue, finally use water
Filter residue is washed till neutrality, after dry, the corncob enzymolysis xylogen of purification is made.
Embodiment 5
Prepare 100g mass concentration be 85% to hydroxyl sulfoacid solution and be heated to 35 DEG C, be completely melt it, by 10g
Thick corncob enzymolysis xylogen solid powder be added above method preparation in hydroxyl sulfoacid solution, the solution at 35 DEG C
With speed stirring heat preservation 30 minutes of 200~300r/min, it is dissolved in corncob enzymolysis xylogen in hydroxyl sulfoacid solution.
Addition makes to hydroxyl sulfoacid solution concentration 30%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.It is past again
Water is added in the filtrate, makes its concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collection filter residue, finally with water handle
Filter residue is washed till neutrality, and after dry, the corncob enzymolysis xylogen of purification is made.
Embodiment 6
It prepares the p-methyl benzenesulfonic acid solution that 100g mass concentration is 80% and is heated to 50 DEG C, be completely melt it, by 10g
Thick corncob enzymolysis xylogen solid powder is added in the p-methyl benzenesulfonic acid solution of above method preparation, the solution at 50 DEG C
With speed stirring heat preservation 10 minutes of 200~300r/min, it is dissolved in corncob enzymolysis xylogen in p-methyl benzenesulfonic acid solution.
Addition makes p-methyl benzenesulfonic acid solution concentration 35%, and the solution is filtered by vacuum, and collects filtrate, removes filter residue.It is past again
Water is added in the filtrate, makes its concentration 11.5% hereinafter, and the filtrate is filtered by vacuum, collection filter residue, finally with water handle
Filter residue is washed till neutrality, and after dry, the corncob enzymolysis xylogen of purification is made.
As a result embodiment effect explanation, the lignin purified with unpurified rugose wood element, acid-precipitation method are detailed in for comparison
Table 1 and FIG. 1 to FIG. 5.
The performance indicator of 1 embodiment of table, 1 product
Seen from table 1, the method for the present invention products obtained therefrom purity is high, high income have significant relative to traditional acid-precipitation method etc.
Advantage.
Fig. 1 is the infrared spectrogram for the enzymolysis xylogen that 1 product of embodiment and acid-precipitation method purify.1 product of embodiment
With acid-precipitation method product in 839cm-1There is stronger absorption, is vibrated herein for the C-H out-of plane bending of aromatic rings；They
1029cm-1There is stronger absorption, is herein secondary alcohol, the C-O bending vibration of ehter bond；They are in 1422cm-1There is stronger absorption,
It is herein the C-H plane deformation vibration on aromatic rings；They are in 1459cm-1There is stronger absorption, is bent and shakes for methoxyl group herein
It is dynamic；They are in 1508,1600cm-1There is stronger absorption, is herein the skeletal vibration of aromatic rings；They are in 1700cm-1Absorption
Peak shows that they have more non-conjugated carbonyl structures, it is seen that they during the extraction process, conjugated double bond structures are destroyed, hair
Some oxidation reactions either esterification is given birth to.In 1708 and 1600cm-1Place, the absorption peak of acid-precipitation method is all than embodiment 1
It is weak, and acid-precipitation method is in 1708cm-1The absorption peak ratio 1600cm at place-1That locates is strong, illustrates acid-precipitation method during the extraction process to wooden
The structure of element is destroyed more serious.They are in 2941cm-1There is stronger absorption, is herein asymmetric C-H stretching vibration.
Fig. 2 is the ultraviolet spectrogram for the enzymolysis xylogen that 1 product of embodiment and acid-precipitation method purify.As seen from the figure,
There is an absorption acromion at 280nm and Red Shift Phenomena has occurred, this is drawn by electron transition in conjugated molecule structure (such as aromatic rings)
The absorption risen.Under same concentrations, 1 product of embodiment and absorbance of the acid-precipitation method product at 450nm are about the same, therefore,
Their color is also about the same.
Fig. 3 is the hydrogen nuclear magnetic resonance spectrogram for the enzymolysis xylogen that 1 product of embodiment and acid-precipitation method purify.Wherein, embodiment 1
Product has absorption peak in 6.80ppm, and acid-precipitation method product has absorption peak in 6.80ppm, this is the virtue on lilac base oxide unit
Fragrant ring proton characteristic absorption peak；1 product of embodiment has absorption peak in 3.80ppm, and acid-precipitation method product has absorption peak in 3.70ppm,
This is the methoxyl group proton characteristic absorption peak being connected with aromatic rings；1 product of embodiment has absorption peak in 3.42ppm, and acid-precipitation method produces
Product have absorption peak in 3.34ppm, this is pendent fatty race methoxy base peak, and the absorption peak of acid-precipitation method product is more strong；Embodiment 1
There is faint absorption peak in 1.23,1.16,1.15,1.12ppm, acid-precipitation method has faint in 1.23,1.08,1.06,1.04ppm
Absorption peak, this is the characteristic absorption peak of hydrogen atom in aliphatic functionality；In the absorption peak that 2.5ppm is solvent DMSO.
Fig. 4 is the grain size distribution for the enzymolysis xylogen that 1 product of embodiment and acid-precipitation method purify.1 product cut size of embodiment
Mainly near 0.621nm, acid-precipitation method product cut size is distributed mainly near 164.18nm, big compared with 1 product of embodiment for distribution.
Fig. 5 is the Zeta potential figure for the enzymolysis xylogen that 1 product of embodiment and acid-precipitation method purify.1 product surface of embodiment
Zeta potential is -12.36mV, and acid-precipitation method product Zeta potential is -14.87mV.The Zeta potential of acid-precipitation method product may be greatly
Because methoxyl group continues to be broken in acid-precipitation method extraction, more hydroxyls are generated.
Other embodiments product result is same as above.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of method of purification of environmentally protective enzymolysis xylogen, it is characterised in that include the following steps：Enzymolysis xylogen
It is added in aromatic sulphonic acid solution, insulated and stirred；A is filtered, filtrate is collected；It is added water in filtrate, filters B, residue washing, drying,
The enzymolysis xylogen purified.
2. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The fragrance
Sulfonic acid be benzene sulfonic acid, p-methyl benzenesulfonic acid, m-toluene sulfonic acid, to ethylbenzenesulfonic acid and at least one of hydroxyl sulfoacid.
3. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：Enzymatic hydrolysis wood used
The mass ratio of quality and aromatic sulphonic acid is 10:30~10:85.
4. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The fragrance sulphur
The concentration of acid solution is 30~85wt%.
5. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The addition water
Dosage to add the concentration of aromatic sulphonic acid solution after water for 11.5% or less.
6. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The heat preservation
Temperature is 25~50 DEG C.
7. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The stirring
Speed is 200~300rpm.
8. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The stirring
Time is 5~40min.
9. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：The filtering A
Before filtering, water diluted system is added, adds the amount of water to add the concentration of aromatic sulphonic acid solution after water for 20% or more.
10. the method for purification of environmentally protective enzymolysis xylogen according to claim 1, it is characterised in that：Filtering B is obtained
Concentrating filter liquor after be recycled and reused in method of purification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546490.3A CN108892784B (en) | 2018-05-31 | 2018-05-31 | Green and environment-friendly method for purifying enzymatic hydrolysis lignin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810546490.3A CN108892784B (en) | 2018-05-31 | 2018-05-31 | Green and environment-friendly method for purifying enzymatic hydrolysis lignin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108892784A true CN108892784A (en) | 2018-11-27 |
| CN108892784B CN108892784B (en) | 2021-02-26 |
Family
ID=64343810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810546490.3A Active CN108892784B (en) | 2018-05-31 | 2018-05-31 | Green and environment-friendly method for purifying enzymatic hydrolysis lignin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108892784B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480429A (en) * | 2020-12-09 | 2021-03-12 | 国际竹藤中心 | Preparation method and application of bamboo nano lignin sun-screening agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140024093A1 (en) * | 2012-03-29 | 2014-01-23 | Shell Oil Company | Process for the production of digested biomass useful for chemicals and biofuels |
| WO2016077315A1 (en) * | 2014-11-12 | 2016-05-19 | E. I. Du Pont De Nemours And Company | Lignin compositions |
| CN107098803A (en) * | 2017-05-16 | 2017-08-29 | 北京林业大学 | The separating-purifying and biodegrading process of a kind of lignin |
| CN107814952A (en) * | 2017-10-18 | 2018-03-20 | 暨南大学 | A kind of lignin nanoparticle and the synchronous preparation method for carrying medicine |
| CN107964073A (en) * | 2017-11-15 | 2018-04-27 | 华南理工大学 | A kind of polycarboxylate water-reducer based on lignin-base polyether monomer and preparation method thereof and the application in concrete |
-
2018
- 2018-05-31 CN CN201810546490.3A patent/CN108892784B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140024093A1 (en) * | 2012-03-29 | 2014-01-23 | Shell Oil Company | Process for the production of digested biomass useful for chemicals and biofuels |
| WO2016077315A1 (en) * | 2014-11-12 | 2016-05-19 | E. I. Du Pont De Nemours And Company | Lignin compositions |
| CN107098803A (en) * | 2017-05-16 | 2017-08-29 | 北京林业大学 | The separating-purifying and biodegrading process of a kind of lignin |
| CN107814952A (en) * | 2017-10-18 | 2018-03-20 | 暨南大学 | A kind of lignin nanoparticle and the synchronous preparation method for carrying medicine |
| CN107964073A (en) * | 2017-11-15 | 2018-04-27 | 华南理工大学 | A kind of polycarboxylate water-reducer based on lignin-base polyether monomer and preparation method thereof and the application in concrete |
Non-Patent Citations (10)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480429A (en) * | 2020-12-09 | 2021-03-12 | 国际竹藤中心 | Preparation method and application of bamboo nano lignin sun-screening agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108892784B (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103711017B (en) | A kind ofly prepare the method for cellulose and lignin as solvent normal pressure ultrasonic wave is auxiliary taking the height alcohol that boils | |
| US8663392B2 (en) | Method and apparatus for lignocellulose pretreatment using a super-cellulose-solvent and highly volatile solvents | |
| CN102864672B (en) | Method for extracting lignin | |
| CN113088542B (en) | Biomass pretreatment process and solvent recovery method used in treatment process thereof | |
| CN110541320B (en) | Method for separating lignin and cellulose from lignocellulose raw material | |
| CN108623817A (en) | A kind of green convenient method of the purifying lignin from raw alkaline lignin | |
| CN102733224A (en) | Method for separating corncob cellulose by using ionic liquid | |
| CN111393670B (en) | Method for efficiently extracting and separating active lignin | |
| CN110551295A (en) | Method for separating chemical components of gramineous plants and purifying lignin | |
| CN100500989C (en) | Full component separation for cell wall of agricultural refuse | |
| CN112626903A (en) | Method for extracting lignin from urea-assisted low-temperature alkali liquor | |
| CN103031762B (en) | Method for preparing material rich in cellulose in degradable ionic liquid solvent | |
| CN110004756B (en) | Method for separating components of wood fiber biomass | |
| CN114197233B (en) | Method for separating and extracting cellulose nanofibers from agricultural and forestry solid wastes | |
| CN108892784A (en) | A kind of method of purification of environmentally protective enzymolysis xylogen | |
| CN110041446B (en) | Comprehensive refining method for biomass | |
| CN111848976B (en) | Method for preparing lignosulfonate by using dissolving pulp precooking waste liquid and application | |
| CN105669879A (en) | Preparation method of xylooligosaccharide | |
| CN101798769B (en) | Process for removing lignin component from straw | |
| CN109162137B (en) | Microcrystalline cellulose and method for preparing microcrystalline cellulose by using crop straws | |
| CN101333552B (en) | Process for producing yam saponin and co-producing glucose by acid-enzyme method prehydrolyzing turmeric | |
| CN113372572B (en) | Method for separating lignin by recycling solid organic acid | |
| CN114108350B (en) | Method for quickly separating main components of wood biomass by using eutectic solvent | |
| CN1315624C (en) | Technological process for producing regenerated cellulose fibre and byproducts utilizing bamboo | |
| CN106243247A (en) | A kind of lignocellulose three components separation method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |