CN116217790A - Polyion liquid for biomass pretreatment and application method thereof - Google Patents
Polyion liquid for biomass pretreatment and application method thereof Download PDFInfo
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- CN116217790A CN116217790A CN202310249833.0A CN202310249833A CN116217790A CN 116217790 A CN116217790 A CN 116217790A CN 202310249833 A CN202310249833 A CN 202310249833A CN 116217790 A CN116217790 A CN 116217790A
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- liquid
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- cellulose
- polyionic
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- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 229920000831 ionic polymer Polymers 0.000 title claims abstract description 39
- 239000002028 Biomass Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000010902 straw Substances 0.000 claims abstract description 36
- 239000001913 cellulose Substances 0.000 claims abstract description 23
- 229920002678 cellulose Polymers 0.000 claims abstract description 23
- 239000002608 ionic liquid Substances 0.000 claims abstract description 16
- 125000002883 imidazolyl group Chemical group 0.000 claims abstract description 7
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000001450 anions Chemical class 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000012295 chemical reaction liquid Substances 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920005604 random copolymer Polymers 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000001988 toxicity Effects 0.000 abstract description 3
- 231100000419 toxicity Toxicity 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract description 2
- 238000002425 crystallisation Methods 0.000 abstract description 2
- 230000008025 crystallization Effects 0.000 abstract description 2
- 230000007062 hydrolysis Effects 0.000 abstract description 2
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 abstract description 2
- 235000010980 cellulose Nutrition 0.000 description 17
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 6
- 239000008103 glucose Substances 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 240000008042 Zea mays Species 0.000 description 4
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 4
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 235000005822 corn Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- IQQRAVYLUAZUGX-UHFFFAOYSA-N 1-butyl-3-methylimidazolium Chemical compound CCCCN1C=C[N+](C)=C1 IQQRAVYLUAZUGX-UHFFFAOYSA-N 0.000 description 1
- 108010059892 Cellulase Proteins 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229940106157 cellulase Drugs 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011557 critical solution Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007071 enzymatic hydrolysis Effects 0.000 description 1
- 238000006047 enzymatic hydrolysis reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 1
- 239000008108 microcrystalline cellulose Substances 0.000 description 1
- 229940016286 microcrystalline cellulose Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/06—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K1/00—Glucose; Glucose-containing syrups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The invention discloses a polyion liquid for biomass pretreatment and a use method thereof, belonging to the field of biomass utilization, wherein polymer repeating units of the polyion liquid comprise the following components in percentage by number: 10% -90% of NIPAM repeating units and 90% -10% of imidazolyl ionic liquid repeating units; compared with the prior art, the application starts from the catalyst, designs the reusable imidazolyl polyionic liquid which can treat straw biomass under mild conditions and selectively treat cellulose components in straw, and the lone pair electrons and anions exposed on N atoms in an imidazole ring can form ionic liquid hydrogen bonds with hydroxyl exposed in a cellulose structure, so that the internal hydrogen bond network of cellulose is weakened, a cellulose crystallization area is broken, and the cellulose hydrolysis rate is effectively improved. The invention relieves the problems of high energy consumption and high residual toxicity in the treatment of the straws by the ionic liquid and adds beneficial attempts for the development and utilization of biomass resources.
Description
Technical Field
The invention relates to the field of biomass utilization, in particular to a polyion liquid for biomass pretreatment and a using method thereof.
Background
As a renewable resource with large reserve, biomass is widely distributed in nature, and the direct utilization rate of biomass is always low due to complex components and poor quality uniformity of biomass. Various crop stalks based on lignocellulose are typical representatives of biomass resources, the main components of which include cellulose (about 40-55%), hemicellulose (about 20-30%) and lignin (about 15-20%). Cellulose is a high molecular compound formed by connecting glucose units through beta-1, 4 glycosidic bonds, and the regular arrangement of molecular chains endows the cellulose with higher crystallinity and good mechanical properties. Cellulose is considered as a potential glucose alternative, but hemicellulose and lignin in lignocellulose have an embedding effect on cellulose, and the interaction between the tight encapsulation and chemical bonds makes cellulose difficult to hydrolyze into monosaccharides, and these complex and stable structures present a great challenge to straw utilization.
Biomass pretreatment can break the network of lignin and reduce the crystallinity of cellulose, making biomass utilization possible. Pretreatment methods can be classified into physical methods (ball milling, pulverization, etc.), physical-chemical methods (hydrothermal, steam explosion, carbonization, etc.), chemical methods (acidolysis, oxidation, organic solvent soaking, ionic liquid treatment, etc.), and biological methods (retting, etc.). The polyionic liquid (Poly (ionic liquid) s) is an ionic liquid polymer which is generated by polymerizing ionic liquid monomers and has anionic and cationic groups on a repeating unit, has the excellent properties of both the ionic liquid and the polymer, is a liquid substance at normal temperature or below 100 ℃, and has low vapor pressure, high stability and strong solubility to inorganic/organic matters. Therefore, a polyionic liquid for biomass pretreatment and a use method thereof are provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the polyion liquid for biomass pretreatment and the use method thereof, and the problems of high energy consumption and high residual toxicity in the treatment of straws by the ion liquid are alleviated.
The aim of the invention can be achieved by the following technical scheme:
a polyionic liquid for biomass pretreatment, the polyionic liquid comprising, in terms of number percentage, 10% -90% of NIPAM repeat units and 90% -10% of imidazolyl ionic liquid repeat units; the structural formula of the polyionic liquid is as follows:
the imidazole ionic liquid [ Bmim ] [ Cl ] can dissolve a large amount of microcrystalline cellulose under mild conditions, and the anions of the imidazole ionic liquid can form hydrogen bonds with the inside of cellulose to break the structure of the cellulose so as to dissolve the cellulose.
N-isopropyl acrylamide (NIPAM) is an amphiphilic compound, and the polymer poly-N-isopropyl acrylamide (PNIPAM) has temperature sensitivity. In the normal temperature water dispersion phase, the hydrophilic amide groups form hydrogen bonds with water molecules, and the polymer is stably swelled in the system. Along with the rise of temperature, the acting force of hydrogen bond is weakened, the hydrophilic effect of hydrogen bond is weaker than the hydrophobic effect of isopropyl when the Low Critical Solution Temperature (LCST) is reached, the polymer is changed from the original swelling state into the aggregation state and is separated out from the system, the macroscopic appearance is that the turbidity of the system is increased, and the light transmittance is reduced. When the temperature is lowered below the LCST, the hydrogen bonding resumes dominant and the polymer returns to the swollen state. The ionic liquid structure with the catalysis function is integrated into a polymer system, meanwhile, the PNIPAM structure can endow the system with temperature sensitivity, and the ionic liquid structure is easy to recycle while catalyzing cellulose hydrolysis.
Further, the polyionic liquid is one or a mixture of two of a block copolymer and a random copolymer.
Further, the anions of the polyionic liquid are Cl-, br-, and the polyionic liquid is a polyionic liquid - 、I - 、CH 3 COO - One or more of the following.
The invention also provides a use method of the polyion liquid, which comprises the following steps:
preparing pretreated straw, polyion liquid and water into a disperse phase according to a proportion, and stirring under the protection of nitrogen to react;
filtering the reaction liquid by using gauze after the reaction is finished, and removing insoluble matters in the reaction liquid;
filtering the reaction liquid at 25 ℃ to obtain treated straw biomass and transparent filtrate; heating the transparent filtrate in water bath until the transparent filtrate is obviously turbid, centrifuging at 40-50deg.C to separate precipitate, washing the precipitate with hot water, and recovering.
The straw in the invention is crop straw, such as corn straw, wheat straw, rice straw, potato straw, rape straw, cotton straw, sugarcane straw and the like.
Further, the straw is straw powder after washing, crushing, drying, sieving, degreasing and deproteinizing; the straw powder meets the requirements of 0.1-5mm in particle size, 0-2% in water content, 30-40% in cellulose content, 0-3% in protein content and 0-1% in fat content.
Further, the mass feed ratio of the straw, the polyion liquid and the water is 5% -30%,30% -50% and 65% -20% respectively.
Further, the reaction temperature of the reaction is 25 ℃ under the protection of nitrogen, the reaction time is 96-168h, and the rotating speed is 80-120rpm.
The invention has the beneficial effects that:
starting from the catalyst, the invention designs the reusable imidazolyl polyion liquid which can treat straw biomass under mild conditions and selectively treat cellulose components in straw, and the lone pair electrons and anions exposed on N atoms in imidazole rings can form ionic liquid hydrogen bonds with hydroxyl groups exposed in a cellulose structure, so that the hydrogen bond network in cellulose is weakened, a cellulose crystallization area is broken, and the cellulose enzymolysis rate is effectively improved. The invention relieves the problems of high energy consumption and high residual toxicity in the treatment of the straws by the ionic liquid.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
Taking 30g of polyion liquid powder, fully dispersing in 95g of water, adding 5g of pretreated (washing, crushing, drying, sieving, degreasing and deproteinizing) corn stalk powder, stirring for 168h in nitrogen atmosphere, and rotating at 100rpm. Pouring out the reaction liquid after the reaction is finished, filtering by using gauze to remove large-particle insoluble impurities, and then carrying out suction filtration on the reaction liquid to obtain the treated straw biomass and transparent filtrate. The filtrate was heated in a boiling water bath for 10min, centrifuged to separate a precipitate while hot, washed with hot water, dried and recovered.
Example 2
30g of the washed and dried polyion liquid powder is taken, fully dispersed in 95g of water, 5g of pretreated (same as in example 1) corn stalk powder is added, and the mixture is stirred for 168h in nitrogen atmosphere at the rotating speed of 100rpm. Pouring out the reaction liquid after the reaction is finished, filtering by using gauze to remove large-particle insoluble impurities, and then carrying out suction filtration on the reaction liquid to obtain the treated straw biomass and transparent filtrate.
Comparative example 1
95g of water was taken, 5g of pretreated (same as in example 1) corn straw powder was added, and stirred under nitrogen atmosphere for 168 hours at 100rpm. Pouring out the reaction liquid after the reaction is finished, filtering by using gauze to remove large-particle insoluble impurities, and then carrying out suction filtration on the reaction liquid to obtain the treated straw biomass and transparent filtrate. The clear filtrate still had no significant change when heated to boiling.
To verify the effect of the polyionic liquid on pretreatment of the straw, the straw biomass treated in the examples and comparative examples was subjected to an enzymolysis reaction. 1.0g of the sample was weighed into a 50mL Erlenmeyer flask, 20mL sodium citrate buffer (20 mM/L), cellulase (10 FPU/g) was added, and the mixture was subjected to enzymatic hydrolysis at 50℃for 24 hours at 100rpm of shaking table. Centrifuging the supernatant after the reaction, and determining glucose content by High Performance Liquid Chromatography (HPLC) with organic acid column at 35deg.C and dilute H as mobile phase 2 SO 4 (5 mM), flow rate 0.5mL/min, test results are shown in the following Table:
| / | example 1 | Example 2 | Comparative example 1 |
| Glucose content (g/L) | 15.73 | 15.58 | 6.24 |
As can be seen from the test results, under the same enzymolysis conditions, the straws treated with the polyionic liquid (examples 1 and 2) can produce more glucose than the control group (comparative example 1) which is not treated, which indicates that the straws treated with the polyionic liquid are more favorable for enzymolysis and produce more glucose. In addition, the concentration of glucose produced by enzymolysis of the straw treated by the unrecovered polyion liquid (example 1) is not obviously different from that of the recovered control group (example 2), which indicates that the polyion liquid can still maintain good catalytic activity after being recovered.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (7)
1. A polyionic liquid for pretreatment of biomass, characterized in that the polymeric repeating units of the polyionic liquid comprise, in percentage by number: 10% -90% of NIPAM repeating units and 90% -10% of imidazolyl ionic liquid repeating units; the structural formula of the polyionic liquid is as follows:
2. the polyionic liquid for pretreatment of biomass as claimed in claim 1, wherein the polyionic liquid is a mixture of one or both of a block copolymer and a random copolymer.
3. The polyionic liquid for pretreatment of biomass as claimed in claim 1, wherein the anion of the polyionic liquid is Cl - 、Br - 、I - 、CH 3 COO - One or more of the following.
4. A method of using a polyionic liquid according to any of claims 1 to 3, comprising the steps of:
preparing the straw, polyion liquid and water into a disperse phase according to a proportion, and stirring under the protection of nitrogen to react; filtering the reaction liquid after the reaction is finished, and removing insoluble matters in the reaction liquid;
filtering the reaction liquid at 25 ℃ to obtain treated straw biomass and transparent filtrate; heating the transparent filtrate in water bath until the transparent filtrate is obviously turbid, centrifuging at 40-50deg.C to separate precipitate, washing the precipitate with hot water, and recovering.
5. The method of using the polyionic liquid according to claim 4, wherein the straw powder has a particle size of 0.1-5mm, a water content of 0-2%, a cellulose content of 30-40%, a protein content of 0-3% and a fat content of 0-1%.
6. The method for using the polyionic liquid according to claim 4, wherein the mass feed ratio of the straw to the polyionic liquid to the water is 5% -30%,30% -50% and 65% -20% respectively.
7. The method according to claim 4, wherein the reaction temperature is 25 ℃, the reaction time is 96-168h, and the rotation speed is 80-120rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310249833.0A CN116217790A (en) | 2023-03-15 | 2023-03-15 | Polyion liquid for biomass pretreatment and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310249833.0A CN116217790A (en) | 2023-03-15 | 2023-03-15 | Polyion liquid for biomass pretreatment and application method thereof |
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| CN116217790A true CN116217790A (en) | 2023-06-06 |
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|---|---|---|---|
| CN202310249833.0A Pending CN116217790A (en) | 2023-03-15 | 2023-03-15 | Polyion liquid for biomass pretreatment and application method thereof |
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| Country | Link |
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|---|---|---|---|---|
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2023
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