CN102875698A - Method for synthesizing bagasse xylan sulfate by sodium aminotrisulfonate water-phase esterification process - Google Patents
Method for synthesizing bagasse xylan sulfate by sodium aminotrisulfonate water-phase esterification process Download PDFInfo
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- CN102875698A CN102875698A CN2012104218321A CN201210421832A CN102875698A CN 102875698 A CN102875698 A CN 102875698A CN 2012104218321 A CN2012104218321 A CN 2012104218321A CN 201210421832 A CN201210421832 A CN 201210421832A CN 102875698 A CN102875698 A CN 102875698A
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- bagasse xylan
- sodium
- aminotrisulfonate
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- 229920001221 xylan Polymers 0.000 title claims abstract description 47
- 241000609240 Ambelania acida Species 0.000 title claims abstract description 35
- 239000010905 bagasse Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000032050 esterification Effects 0.000 title claims abstract description 8
- 238000005886 esterification reaction Methods 0.000 title claims abstract description 8
- 239000011734 sodium Substances 0.000 title abstract description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title abstract description 7
- 229910052708 sodium Inorganic materials 0.000 title abstract description 7
- -1 xylan sulfate Chemical class 0.000 title abstract description 5
- 230000002194 synthesizing effect Effects 0.000 title abstract 2
- 150000004823 xylans Chemical class 0.000 claims abstract description 45
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- BCTWNMTZAXVEJL-UHFFFAOYSA-N phosphane;tungsten;tetracontahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.P.[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W] BCTWNMTZAXVEJL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000002148 esters Chemical class 0.000 claims description 20
- 239000000047 product Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000013019 agitation Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000967 suction filtration Methods 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 8
- 239000008346 aqueous phase Substances 0.000 claims description 5
- 208000012826 adjustment disease Diseases 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000012074 organic phase Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 abstract description 2
- 239000012071 phase Substances 0.000 abstract 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 abstract 1
- 235000010288 sodium nitrite Nutrition 0.000 abstract 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 abstract 1
- 238000001291 vacuum drying Methods 0.000 abstract 1
- 238000003828 vacuum filtration Methods 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 239000008273 gelatin Substances 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 235000011852 gelatine desserts Nutrition 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012445 acidic reagent Substances 0.000 description 1
- SRBFZHDQGSBBOR-LECHCGJUSA-N alpha-D-xylose Chemical group O[C@@H]1CO[C@H](O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-LECHCGJUSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000010100 anticoagulation Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 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
- 150000003053 piperidines Chemical class 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Chemical class 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- XTHPWXDJESJLNJ-UHFFFAOYSA-N sulfurochloridic acid Chemical compound OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
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- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention discloses a method for synthesizing bagasse xylan sulfate by a sodium aminotrisulfonate water-phase esterification process, which comprises the following steps: reacting an NaHSO3 solution and a NaNO2 solution to obtain an esterifying agent sodium aminotrisulfonate (N(SO3Na)3) solution with sulfo-group; and by using bagasse xylan as the main raw material, sodium aminotrisulfonate as the esterifying agent and 12-tungstophosphoric acid as a catalyst, carrying out catalytic reaction on the bagasse xylan and the esterifying agent sodium aminotrisulfonate in a water phase to generate bagasse xylan sodium sulfonate, acidifying, washing with acetone, carrying out vacuum filtration, and drying to obtain the bagasse xylan sulfate. The method disclosed by the invention has the advantages of high degree of substitution, low cost, simple technological operation, environmental protection, easy after-treatment and the like, and overcomes some defects in the organic phase process.
Description
Technical field
The present invention relates to the method for the synthetic bagasse xylan sulfuric ester of a kind of amino sodium trisulfonate esterification in aqueous phase method.
Background technology
Xylan is the main component that extensively is present in hemicellulose in the natural vegetable fibre, has unique biological activity, biodegradable, nontoxicity and good biocompatibility.Because the defective of xylan self performance is subject to the attention of increasing Chinese scholars to its modification.At present, the modification technology of xylan mainly comprises the etherificate, esterification, oxidation of xylan and crosslinked etc.Research finds, xylan can establishment HIV behind sulphating to CD
4Infecting of cell, and have the effect of anticoagulation, thrombus dissolving.At present, the organic reagent reaction system is generally adopted in the reaction of synthetic xylan sulfuric ester both at home and abroad, as xylan and piperidines-N-sulfonate are reacted in DMSO, can prepare the piperidines of substitution value between 0.2～1.6-
N-sulfonic group xylan; Also available chlorine sulfonic acid-pyridine method is that chlorsulfonic acid is esterifying reagent, and anhydrous pyridine and methane amide etc. are the synthetic corn cob of reaction solvent or bagasse xylan sulfuric ester.Why xylan sulfuric acid ester synthesis adopts organic reagent as the solvent of reaction system more, is because mostly the esterifying agent of preparation xylan sulfuric ester is strongly-acid reagent, does the degraded that the xylan chain could be avoided or alleviate to solvent with organic reagent.But, so that organic reagent is loaded down with trivial details as the technique of the synthetic xylan sulfuric ester of the solvent method of reaction system, environmental pollution serious, cost is relatively high, aftertreatment trouble etc.
The present invention adopts a kind of relatively mild esterifying agent to substitute the strongly-acid esterifying agent take bagasse xylan as main raw material, and reaction system changes water into from organic phase, thereby avoids the degraded of xylan chain in the reaction process.
Summary of the invention
The objective of the invention is to prepare the problems such as environmental protection that the bagasse xylan sulfuric ester exists in order to overcome present organic solvent method, the method for the standby bagasse xylan sulfuric ester of a kind of amino sodium trisulfonate esterification in aqueous phase legal system is provided.
Concrete steps are:
(1) with 6 ~ 8g solid NaHSO
3Add successively in the four-necked bottle that volume is 250mL the even NaHSO that gets of stirring and dissolving under the room temperature with 25 ~ 30mL distilled water
3Solution.
(2) NaHSO of heating steps (1) gained under agitation
3Solution to temperature is 80 ~ 90 ℃, evenly drips massfraction and be 20% NaNO
2Solution 4 ~ 7mL controls 20 ~ 30 minutes and dropwises, and continues to stir 10 ~ 15 minutes, gets the amino sodium trisulfonate solution of esterifying agent.
(3) take by weighing 3 ~ 6g bagasse xylan and join in the amino sodium trisulfonate solution of step (2) gained, add again 0.03 ~ 0.2g catalyzer 12-tungstophosphoric acid; The control temperature of reaction is 40 ~ 60 ℃, and adopting massfraction is that 5% sodium hydroxide solution adjustment reaction system pH is 7～10, under agitation reacts 4～6 hours.
(4) add the analytical pure acetone of 30 ~ 50mL in step (3) the gained reaction solution, precipitate 15 ~ 20 minutes; Suction filtration, and with 15 ~ 20mL analytical pure washing with acetone throw out filter cake 3 times.
(5) throw out after step (4) the gained washing is placed the four-necked bottle of 250mL, add 40 ~ 50mL distilled water, under agitation drip 2 ~ 5mL massfraction and be 38% hydrochloric acid soln, dropwise rear continuation and stirred 10 ~ 15 minutes.
(6) gained solution in the step (5) is transferred in the beaker of 500mL, under glass stick stirs, added 25 ~ 30mL analytical pure acetone, separate out the rear suction filtration of precipitation, obtain the thick product of bagasse xylan sulfuric ester.
(7) with the thick product of gained in the step (6) with 10 ~ 15mL analytical pure washing with acetone 3 times, suction filtration gets throw out.
(8) throw out with gained in the step (7) places 50 ℃ thermostatic drying chamber to be dried to constant weight, namely gets product bagasse xylan sulfuric ester.
(9) adopt BaCl
2The substitution value of products obtained therefrom in the-Turbidity of Gelatin method determination step (8).Substitution value
DSCalculation formula be:
DS=(132×
S%)/(32－102×
S%)
In the formula:
S%---the quality percentage composition of sulphur in the sample;
132---the relative molecular mass of wood sugar unit in the xylan molecule;
102---after being substituted, 1 hydroxyl in the polysaccharide molecule becomes-OSO
3Na, the increased value of relative molecular mass is 102;
32---the relative atomic mass of S.
NaHSO
3And NaNO
2Under certain conditions reaction can generate the amino sodium trisulfonate (N (SO with sulfonic acid group
3Na)
3), amino sodium trisulfonate can be used as esterifying agent and bagasse xylan and reacts and generate the bagasse xylan sulfonate sodium, can obtain the bagasse xylan sulfuric ester through acidifying again.The advantages such as the method for the synthetic bagasse xylan sulfuric ester of the amino sodium trisulfonate esterification in aqueous phase method that the present invention relates to has the substitution value height, cost is low, technological operation is easy, environmental protection, aftertreatment are easy have overcome the some shortcomings of organic phase method.
Description of drawings
Fig. 1 is bagasse xylan IR figure.
Fig. 2 is the bagasse xylan sulfuric ester IR figure of the embodiment of the invention 2 preparations.
Fig. 3 is former tapioca (flour) SEM figure.
Fig. 4 is the bagasse xylan sulfuric ester SEM figure of the embodiment of the invention 2 preparations.
Embodiment
Embodiment 1:
(1) with 7.2gNaHSO
3Solid and 30mL distilled water add in the four-necked bottle, and NaHSO at room temperature stirs to get
3Solution.
(2) NaHSO of heating steps (1) gained under agitation
3Solution to temperature is 82 ± 2 ℃, evenly drips massfraction and be 20% NaNO
2Solution 5mL after controlling 25 minutes and dropwising, continues to stir 10 minutes, gets the amino sodium trisulfonate solution of esterifying agent.
(3) take by weighing the 3.50g bagasse xylan and join in the amino sodium trisulfonate solution of step (2) gained, add again 0.1g catalyzer 12-tungstophosphoric acid; The control temperature of reaction is 50 ℃, and adopting massfraction is that 5% sodium hydroxide solution adjustment reaction system pH is 9.0, under agitation reacts 5 hours.
(4) add the analytical pure acetone of 35mL in step (3) the gained reaction solution, precipitate 20 minutes; Suction filtration, and with 15mL analytical pure washing with acetone throw out filter cake 3 times.
(5) throw out after step (4) the gained washing is placed the four-necked bottle of 250mL, add 45mL distilled water, under agitation drip the 3mL massfraction and be 38% hydrochloric acid soln, dropwise rear continuation and stirred 15 minutes.
(6) gained solution in the step (5) is transferred in the beaker of 500mL, under glass stick stirs, added 30mL analytical pure acetone, separate out the rear suction filtration of precipitation, obtain the thick product of bagasse xylan sulfuric ester.
(7) with 15mL analytical pure washing with acetone 3 times of the thick product of gained in the step (6), suction filtration gets throw out.
(8) throw out with gained in the step (7) places 50 ℃ thermostatic drying chamber to be dried to constant weight, namely gets product.
(9) use BaCl
2The substitution value of products obtained therefrom in the-Turbidity of Gelatin method determination step (8), getting its substitution value is 1.22.
Embodiment 2:
(1) with 5.0gNaHSO
3Solid and 25mL distilled water add in the four-necked bottle, and NaHSO at room temperature stirs to get
3Solution.
(2) NaHSO of heating steps (1) gained under agitation
3Solution to temperature is 85 ± 2 ℃, evenly drips massfraction and be 20% NaNO
2Solution 4mL after controlling 20 ~ 25 minutes and dropwising, continues to stir 10 minutes, gets the amino sodium trisulfonate solution of esterifying agent.
(3) take by weighing the 3.00g bagasse xylan and join in the amino sodium trisulfonate solution of step (2) gained, add again 0.08g catalyzer 12-tungstophosphoric acid; The control temperature of reaction is 40 ℃, and adopting massfraction is that 5% sodium hydroxide solution adjustment reaction system pH is 10.0, under agitation reacts 4 hours.
4) add the analytical pure acetone of 30mL in step (3) the gained reaction solution, precipitate 15 minutes; Suction filtration, and with 13mL analytical pure washing with acetone throw out filter cake 3 times.
(5) throw out after step (4) the gained washing is placed the four-necked bottle of 250mL, add 35mL distilled water, under agitation drip the 2mL massfraction and be 38% hydrochloric acid soln, dropwise rear continuation and stirred 15 minutes.
(6) gained solution in the step (5) is transferred in the beaker of 500mL, under glass stick stirs, added 25mL analytical pure acetone, separate out the rear suction filtration of precipitation, obtain the thick product of bagasse xylan sulfuric ester.
(7) with thick product 15mL washing with acetone 3 times of gained in the step (6), suction filtration gets throw out.
(8) throw out with gained in the step (7) places 50 ℃ thermostatic drying chamber to be dried to constant weight, namely gets product.
(9) use BaCl
2The substitution value of products obtained therefrom in the-Turbidity of Gelatin method determination step (8), getting its substitution value is 0.51.
Product is analyzed through IR, and spectrogram is at 1122.78cm
-1The place is the feature stretching vibration absorption peak of S=O, 803.52cm
-1The place is the feature stretching vibration absorption peak of S-O; In the IR of bagasse xylan figure, then do not observe these absorption peaks, illustrate bagasse xylan successfully on the keyed jointing sulfate groups.The sem analysis result has shown the particle surface pattern before and after the bagasse xylan modification, can find out the bagasse xylan rough, is amorphous state; And bagasse xylan sulfuric ester particle surface has obvious damaged rill and space, and the maximum diameter of hole reaches 4.8 μ m, and its structure originally is damaged form and structure generation considerable change.
Claims (1)
1. the method for the synthetic bagasse xylan sulfuric ester of an amino sodium trisulfonate esterification in aqueous phase method is characterized in that concrete steps are:
(1) with 6 ~ 8g solid NaHSO
3Add successively in the four-necked bottle that volume is 250mL the even NaHSO that gets of stirring and dissolving under the room temperature with 25 ~ 30mL distilled water
3Solution;
(2) NaHSO of heating steps (1) gained under agitation
3Solution to temperature is 80 ~ 90 ℃, evenly drips massfraction and be 20% NaNO
2Solution 4 ~ 7mL controls 20 ~ 30 minutes and dropwises, and continues to stir 10 ~ 15 minutes, gets the amino sodium trisulfonate solution of esterifying agent;
(3) take by weighing 3 ~ 6g bagasse xylan and join in the amino sodium trisulfonate solution of step (2) gained, add again 0.03 ~ 0.2g catalyzer 12-tungstophosphoric acid; The control temperature of reaction is 40 ~ 60 ℃, and adopting massfraction is that 5% sodium hydroxide solution adjustment reaction system pH is 7～10, under agitation reacts 4～6 hours;
(4) add the analytical pure acetone of 30 ~ 50mL in step (3) the gained reaction solution, precipitate 15 ~ 20 minutes; Suction filtration, and with 15 ~ 20mL analytical pure washing with acetone throw out filter cake 3 times;
(5) throw out after step (4) the gained washing is placed the four-necked bottle of 250mL, add 40 ~ 50mL distilled water, under agitation drip 2 ~ 5mL massfraction and be 38% hydrochloric acid soln, dropwise rear continuation and stirred 10 ~ 15 minutes;
(6) gained solution in the step (5) is transferred in the beaker of 500mL, under glass stick stirs, added 25 ~ 30mL analytical pure acetone, separate out the rear suction filtration of precipitation, obtain the thick product of bagasse xylan sulfuric ester;
(7) with the thick product of gained in the step (6) with 10 ~ 15mL analytical pure washing with acetone 3 times, suction filtration gets throw out;
(8) throw out with gained in the step (7) places 50 ℃ thermostatic drying chamber to be dried to constant weight, namely gets product bagasse xylan sulfuric ester.
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| CN104119452A (en) * | 2014-07-16 | 2014-10-29 | 北京化工大学 | Method for synthesizing cellulose ester by virtue of polyacid catalysis |
| CN104530263A (en) * | 2014-12-17 | 2015-04-22 | 桂林理工大学 | Preparation method of gallic acid-bagasse xylan ester |
| CN104610469A (en) * | 2015-03-08 | 2015-05-13 | 桂林理工大学 | Synthesis method for anti-staphylococcus aureus double-activity gallic acid-sulfated bagasse xylan |
| CN104628882A (en) * | 2015-03-08 | 2015-05-20 | 桂林理工大学 | Synthetic method of sulfo bagasse xylan phthalate |
| CN106366216A (en) * | 2016-10-26 | 2017-02-01 | 桂林理工大学 | Synthetic method of double-activity sulfonate-based bagasse xylan salicylsulfonic acid ester |
| CN106366215A (en) * | 2016-10-26 | 2017-02-01 | 桂林理工大学 | Preparation method of double-esterification active sulfo bagasse xylan paraben |
| CN106519079A (en) * | 2016-10-26 | 2017-03-22 | 桂林理工大学 | Synthetic method of anti-HIV-activity sulfonyl bagasse xylan polyethylene terephthalate |
| CN106565857A (en) * | 2016-10-26 | 2017-04-19 | 桂林理工大学 | Method for synthesizing double-active sulfo bagasse xylan isophthalate |
| CN107417810A (en) * | 2017-09-15 | 2017-12-01 | 桂林理工大学 | The synthetic method of AntiHIV1 RT activity double activated sulfonic group bagasse xylan ferrocenecarboxylic acid ester |
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| CN104119452A (en) * | 2014-07-16 | 2014-10-29 | 北京化工大学 | Method for synthesizing cellulose ester by virtue of polyacid catalysis |
| CN104530263A (en) * | 2014-12-17 | 2015-04-22 | 桂林理工大学 | Preparation method of gallic acid-bagasse xylan ester |
| CN104530263B (en) * | 2014-12-17 | 2016-09-28 | 桂林理工大学 | A kind of preparation method of gallic acid bagasse xylan ester |
| CN104610469A (en) * | 2015-03-08 | 2015-05-13 | 桂林理工大学 | Synthesis method for anti-staphylococcus aureus double-activity gallic acid-sulfated bagasse xylan |
| CN104628882A (en) * | 2015-03-08 | 2015-05-20 | 桂林理工大学 | Synthetic method of sulfo bagasse xylan phthalate |
| CN106366216A (en) * | 2016-10-26 | 2017-02-01 | 桂林理工大学 | Synthetic method of double-activity sulfonate-based bagasse xylan salicylsulfonic acid ester |
| CN106366215A (en) * | 2016-10-26 | 2017-02-01 | 桂林理工大学 | Preparation method of double-esterification active sulfo bagasse xylan paraben |
| CN106519079A (en) * | 2016-10-26 | 2017-03-22 | 桂林理工大学 | Synthetic method of anti-HIV-activity sulfonyl bagasse xylan polyethylene terephthalate |
| CN106565857A (en) * | 2016-10-26 | 2017-04-19 | 桂林理工大学 | Method for synthesizing double-active sulfo bagasse xylan isophthalate |
| CN106366216B (en) * | 2016-10-26 | 2019-11-26 | 桂林理工大学 | A kind of synthetic method of double activated sulfonic group bagasse xylan sulfosalicylic acid ester |
| CN107417810A (en) * | 2017-09-15 | 2017-12-01 | 桂林理工大学 | The synthetic method of AntiHIV1 RT activity double activated sulfonic group bagasse xylan ferrocenecarboxylic acid ester |
| CN107556405A (en) * | 2017-09-15 | 2018-01-09 | 桂林理工大学 | A kind of preparation method of double activated sulfonic group bagasse xylan to hydroxyl salicylate |
| CN107417810B (en) * | 2017-09-15 | 2019-11-26 | 桂林理工大学 | The synthetic method of AntiHIV1 RT activity double activated sulfonic group bagasse xylan ferrocenecarboxylic acid ester |
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