CN104313195A - Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis - Google Patents
Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis Download PDFInfo
- Publication number
- CN104313195A CN104313195A CN201410566340.0A CN201410566340A CN104313195A CN 104313195 A CN104313195 A CN 104313195A CN 201410566340 A CN201410566340 A CN 201410566340A CN 104313195 A CN104313195 A CN 104313195A
- Authority
- CN
- China
- Prior art keywords
- solid acid
- carbonyl
- solid
- hemicellulose
- xylo
- 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
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13K—SACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
- C13K13/00—Sugars not otherwise provided for in this class
- C13K13/002—Xylose
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Saccharide Compounds (AREA)
Abstract
The invention discloses a method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis. The method comprises the following steps: carbonizing a bamboo raw material at a certain temperature under the protection of nitrogen; sulfonating the obtained black solid in concentrated sulfuric acid with certain concentration in a nitrogen environment; filtering the sulfonated solution, and flushing the obtained solid product with hot water till no SO4<2-> is detected; performing vacuum drying on the solid product to obtain a carbonyl solid acid catalyst; dissolving hemicellulose into deionized water, and heating in a microwave reactor under the selected temperature, time, water adding quantity and carbonyl solid acid catalyst quantity to degrade the hemicellulose; and centrifuging the obtained solution after the reaction, filtering the liquid phase part, and measuring the xylooligosaccharide content of the liquid phase part by using high anion chromatography. The method has the beneficial effects that the valuable xylooligosaccharide can be prepared by effectively utilizing bamboo wastes, the method is simple and environment-friendly, and the catalyst can be recycled.
Description
Technical field
The present invention relates to biomass resource trans-utilization technical field, specifically, relate to a kind of method utilizing carbonyl solid acid catalysis degradation of hemicellulose to prepare xylo-oligosaccharide.
Background technology
Xylo-oligosaccharide is also known as wood oligose, and be combined into β-(1 → 4)-xyloside key by 2-7 D-wood sugar, it is widely used in the fields such as food, healthcare products, beverage, medicine and fodder additives, integrates health care, nutrition, dietotherapy.Xylo-oligosaccharide can make the bifidus bacillus of human body breed in a large number, thus reaches and make probiotic bacterium become enteron aisle dominant bacteria, gets rid of the object of harmful bacteria.Its effect is 20 times of other polymerization carbohydrate, and has the special performances such as heat-resisting, acidproof, difficult fermentation.For diseases such as prevention and prohibition human body hyperlipidemia, diabetes, obesity, optimize micro-ecological environment in body and there is unusual effect.
At present, the acquisition of xylo-oligosaccharide can be divided into following four kinds of methods substantially: extraction from natural matter, process for solid-phase microwave synthesis, acid-base chemical conversion method and enzyme hydrolysis method.Traditional processing technology take natural phant as raw material, then adopts the methods such as acidolysis, enzymolysis or microwave degradation, the saccharan in plant is degraded to the oligose of different polymerization degree, then obtains through a series of separation and purification.These courses of processing all need the acid, the bases chemical reagent that consume certain consumption, and to need in subsequent handling in addition separation removal, and the partial organic substances of stripping simultaneously enters waste water system, can damage, hinder its industrial applications to environment.
In order to overcome the weak point of above-mentioned catalyzer, solid acid catalyst is applied to hydrolysis of hemicellulose.Solid acid catalyst is the important one of commercial catalysts, and its catalysis derives from the acid sites with catalytic activity that solid surface exists, and is called acid site.This kind of catalyzer is widely used in the catalyzed reaction of ionic mechanism, and kind is a lot, such as molecular sieve, oxide compound and resin etc.In addition, also have load-type solid acid catalyst, liquid acidic group appendix is formed, as solid phosphoric acid catalyst on solid carrier.Which overcome the shortcomings of liquid acid, have that higher selectivity, aftertreatment are simple, product is easy to be separated, not etching apparatus, catalyzer can repeatedly repeat to reclaim use, environmentally friendly and the advantages such as technique serialization can be realized.
Traditional solid acid catalyst for degradation biological matter has metal oxide, H-molecular sieve, Zeo-karb and carried heteropoly acid etc.But because the preparation process of these solid acids is very numerous and diverse, and raw material mostly costly, far can not reach the requirement of scale operation.Therefore carbonyl solid acid is more and more taken seriously, the poly structure that this novel solid acid obtains by not exclusively carbonizing sulfonic group aromatic hydrocarbons, can be used for multiple catalyzed reaction, such as, people's Chinese invention patent notification number CN 102489316A such as paint Xinhua of Nankai University propose by carbonization carbonyl carbon microspherical catalyst degraded cellulose technique, the reducing sugar yield that hydrocellulose obtains in novel green solvent ionic liquid is high and the reaction times is short, compared with liquid acids, pollution-free in reaction process, corrosion-free and can repeatedly recycle; People's Chinese invention patent publication number CN 102814189A such as China Science & Technology University Fu Yao disclose and use silicon source, alkali source, metallic compound and template to prepare solid acid catalyst by the method such as hydro-thermal reaction, calcining and be used for preparing 5 hydroxymethyl furfural; People's Chinese invention patent publication number CN 103242270A such as East China University of Science Wang Yan celery disclose after biomass or derivatives thereof and solid acid catalyst mixing, adopt organic solvent/saturated inorganic salt solution two-phase reaction system, efficiently prepare furfural and 5 hydroxymethyl furfural in a mild condition.
Summary of the invention
The object of this invention is to provide the preparation of a kind of carbonyl solid acid and catalyzed degradation hemicellulose prepares the method for xylo-oligosaccharide, to overcome the problems such as the complex process that exists in prior art and portion of product pollute the environment.
For realizing above-mentioned technical purpose, technical scheme of the present invention is achieved in that
A preparation method for carbonyl solid acid, comprises the following steps: first carbonized under certain temperature, nitrogen protection by bamboo material; Then by the black solid that obtains in the certain mass concentration vitriol oil, sulfonation under nitrogen environment; The solution obtained after sulfonation process is filtered, gained solid product with hot water injection to detecting without SO
4 2 –; Namely solid product vacuum-drying obtain carbonyl solid acid catalyst.
Further, described bamboo material is 40-60 order.
Further, carbonization temperature is 450 DEG C, and carbonization time is 5 hours.
Further, after charing process, the black solid that obtains first carries out milled processed, then carries out sulfonation process in the vitriol oil adding 98%.
Further, with the deionized water being greater than 80 DEG C, described solid product is rinsed.
Further, sulfonation temperature is 180 DEG C, and sulfonation time is 12 hours.
Further, described black solid and 98%(mass concentration) solid-to-liquid ratio of the vitriol oil is 1:15(g/ml).
Utilize above-mentioned carbonyl solid acid catalysis degradation of hemicellulose to prepare a method for xylo-oligosaccharide, comprise the following steps:
First being dissolved in deionized water by hemicellulose, then heating in microwave reactor under selected temperature of reaction, reaction times, amount of water and above-mentioned carbonyl solid acid catalysis dosage, will there is DeR in hemicellulose; After reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Further, temperature of reaction is 130-160 DEG C, and the reaction times is 15-60 minute.
Further, carbonyl solid acid catalyst mortar grinder 30 minutes, the solid-to-liquid ratio of carbonyl solid acid catalyst and the aqueous solution is 1:100 – 1:400(g/ml).
Beneficial effect of the present invention:
The present invention can effectively utilize bamboo wastes to prepare valuable xylo-oligosaccharide, the present invention adopts liquid water to be reaction medium, hemicellulose formation solution soluble in water can be made, outphasing system is formed with solid acid catalyst, so both be convenient to the recycling of catalyzer, xylo-oligosaccharide can be made again to exist in liquid form and be convenient to be separated.
Prepare solid acid with bamboo material simultaneously, it also avoid the destruction of toxicity negatively charged ion to environment, reach environmental protection, efficiently object.
The inventive method is compared with existing degradation method, that a kind of technique is simple, the method for the recyclable recycling of environmental friendliness, catalyzer, method forestry waste being converted into high level product can be realized, thus promote the development of green agriculture and forestry, there is Social and economic benef@widely.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the sign to the carbonyl solid acid catalyst prepared, and comprises X-ray diffraction, FTIR spectrum, scanning electron microscope (SEM) photograph and thermogravimetric analysis figure;
Xylo-oligosaccharide productive rate (reaction conditions: hemicellulose (1g), deionized water (10ml), solid acid catalyst (0.3g)) schematic diagram over time at the differential responses temperature that Fig. 2 provides for the embodiment of the present invention;
Xylo-oligosaccharide productive rate (reaction conditions: hemicellulose (1g), 150 DEG C) schematic diagram over time under the different solid acid that Fig. 3 provides for the embodiment of the present invention and water-content ratio.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment 1:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C and be precipitated to without SO
4 2 –be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.1g hemicellulose, then join in solution by the BCS that 0.1g step (1) is obtained, heat 15 minutes at 130 DEG C in microwave reactor, timing from temperature rises to 130 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 2.0%.
Embodiment 2:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C and be precipitated to without SO
4 2 –be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.1g hemicellulose, then join in solution by the BCS that 0.1g step (1) is obtained, heat 45 minutes at 130 DEG C in microwave reactor, timing from temperature rises to 130 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 10.0%.
Embodiment 3:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C and be precipitated to without SO
4 2 –be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.1g hemicellulose, then join in solution by the BCS that 0.1g step (1) is obtained, heat 45 minutes at 150 DEG C in microwave reactor, timing from temperature rises to 150 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 54.7%.
Embodiment 4:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C and be precipitated to without SO
4 2-be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.1g hemicellulose, then join in solution by the BCS that 0.1g step (1) is obtained, heat 30 minutes at 160 DEG C in microwave reactor, timing from temperature rises to 160 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 42.1%.
Embodiment 5:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C and be precipitated to without SO
4 2-be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.1g hemicellulose, then join in solution by the BCS that 0.1g step (1) is obtained, heat 60 minutes at 160 DEG C in microwave reactor, timing from temperature rises to 160 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 22.6%.
Embodiment 6:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C in a large number and be precipitated to without SO
4 2-be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.2g hemicellulose, then join in solution by the BCS that 0.2g step (1) is obtained, heat 30 minutes at 150 DEG C in microwave reactor, timing from temperature rises to 150 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 55.7%.
Embodiment 7:
(1) the dried Dendrocalamus spp. material of 20g (40 – 60 order) 450 DEG C of heating 5h are under nitrogen protection got, and the black solid grind into powder that will obtain.4g black powder is added 98% vitriol oil by mass volume ratio 1:15, under nitrogen protection 180 DEG C of sulfonation 12h.Gained solution is filtered, carries out flushing with the distilled water being greater than 80 DEG C in a large number and be precipitated to without SO
4 2-be detected.Namely black precipitate is obtained bamboo wood based solid acid after dry 12h, referred to as BCS at 100 DEG C;
(2) be dissolved in 20ml deionized water by 0.05g hemicellulose, then join in solution by the BCS that 0.05g step (1) is obtained, heat 60 minutes at 150 DEG C in microwave reactor, timing from temperature rises to 150 DEG C, the heating-up time is 5 minutes;
(3) after step (2) reaction terminates, gained solution is carried out centrifugally operated, liquid phase part filters and surveys its xylo-oligosaccharide content with high anion chromatographic, and solid part is separated and obtains solid acid recycling.
Xylo-oligosaccharide (xylo-bioses is to wood six sugar) total yield is 52.1%.
Fig. 1 is the sign to the carbonyl solid acid catalyst prepared, and comprises X-ray diffraction, FTIR spectrum, scanning electron microscope (SEM) photograph and thermogravimetric analysis figure.Carbonyl solid acid catalyst of the present invention, its molecular formula is CH
0.55o
0.49s
0.0116.This catalyzer characterizes through XRD, SEM, FT-IR and proves that – OH, – COOH, – SO are rich in its surface after ultimate analysis
3h functional group.
Fig. 2-3 and in table 1 and table 2,1 to the 7 xylo-oligosaccharide content obtained compares analysis in conjunction with the embodiments, and carries out analysis to hydrolyzed solution molecular weight and measure.By with the comparing of degraded yield not adding catalyzer, can prove that the preparation-obtained solid acid catalyst of the present invention is prepared xylo-oligosaccharide to degradation of hemicellulose and had good effect.In addition, the change of lignin molecule amount under different condition, describes in catalyzed degradation process, hemicellulose degraded in various degree.
Table 1 xylo-oligosaccharide content analysis
Table 2 hydrolyzed solution molecular weight and polydispersity coefficient
In sum, by means of technique scheme of the present invention, prepare carbonyl solid acid by adopting discarded bamboo wood and prepare xylo-oligosaccharide with catalyzed degradation hemicellulose, thus its preparation technology is simplified, and reach the object of environmental friendliness and catalyst recovery recycling, and then reach the object promoting its industrial applications.
By adopting liquid water as reaction medium, thus making hemicellulose formation solution soluble in water, forming outphasing system with solid acid catalyst, and then reach the object being convenient to recycle catalyzer and facilitate separating oligomeric wood sugar.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a preparation method for carbonyl solid acid, is characterized in that, comprises the following steps:
First bamboo material is carbonized under certain temperature, nitrogen protection;
Then by the black solid that obtains in the vitriol oil of certain mass concentration, sulfonation under nitrogen environment;
The solution obtained after sulfonation process is filtered, gained solid product with hot water injection to detecting without SO
4 2 –;
Namely solid product obtains carbonyl solid acid catalyst 100 DEG C of vacuum-dryings.
2. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: described bamboo material is 40-60 order.
3. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: carbonization temperature is 450 DEG C, and carbonization time is 5 hours.
4. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: after charing process, the black solid that obtains first carries out milled processed, then carries out sulfonation process in the vitriol oil adding 98%.
5. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: rinse described solid product with the deionized water being greater than 80 DEG C.
6. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: sulfonation temperature is 180 DEG C, and sulfonation time is 12 hours.
7. the preparation method of carbonyl solid acid according to claim 1, is characterized in that: the solid-to-liquid ratio of described black solid and 98% vitriol oil is 1:15g/ml.
8. utilize the carbonyl solid acid catalysis degradation of hemicellulose described in claim 1-7 to prepare a method for xylo-oligosaccharide, it is characterized in that, comprise the following steps:
First being dissolved in deionized water by hemicellulose, then heating in microwave reactor under selected temperature of reaction, reaction times, amount of water and above-mentioned carbonyl solid acid catalysis dosage, will there is DeR in hemicellulose; After reaction terminates, gained solution is carried out centrifugally operated, obtain the liquid phase part containing xylo-oligosaccharide.
9. the method preparing xylo-oligosaccharide according to claim 8, is characterized in that: selected temperature of reaction is 130-160 DEG C, and the reaction times is 15-60 minute.
10. the method preparing xylo-oligosaccharide according to claim 8, is characterized in that: carbonyl solid acid catalyst mortar grinder 30 minutes, and the solid-to-liquid ratio of carbonyl solid acid catalyst and the aqueous solution is 1:100 – 1:400g/ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566340.0A CN104313195A (en) | 2014-10-22 | 2014-10-22 | Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566340.0A CN104313195A (en) | 2014-10-22 | 2014-10-22 | Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104313195A true CN104313195A (en) | 2015-01-28 |
Family
ID=52368503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410566340.0A Pending CN104313195A (en) | 2014-10-22 | 2014-10-22 | Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104313195A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498801A (en) * | 2015-12-29 | 2016-04-20 | 华南理工大学 | Preparation method of sulfated carbonized corn cob catalyst and method for preparing furfural from xylose in presence of catalyst |
| CN107142338A (en) * | 2017-06-08 | 2017-09-08 | 郑州职业技术学院 | A kind of steam explosion pretreated straw extracts the method and its device of xylo-oligosaccharide |
| CN107362810A (en) * | 2017-07-05 | 2017-11-21 | 华南农业大学 | A kind of magnetic mao bamboon charcoal solid acid catalyst and preparation method and its application in xylo-oligosaccharide is prepared |
| CN109225275A (en) * | 2018-11-06 | 2019-01-18 | 绍兴文理学院 | A kind of preparation method of carbon-based solid acid |
-
2014
- 2014-10-22 CN CN201410566340.0A patent/CN104313195A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498801A (en) * | 2015-12-29 | 2016-04-20 | 华南理工大学 | Preparation method of sulfated carbonized corn cob catalyst and method for preparing furfural from xylose in presence of catalyst |
| CN107142338A (en) * | 2017-06-08 | 2017-09-08 | 郑州职业技术学院 | A kind of steam explosion pretreated straw extracts the method and its device of xylo-oligosaccharide |
| CN107362810A (en) * | 2017-07-05 | 2017-11-21 | 华南农业大学 | A kind of magnetic mao bamboon charcoal solid acid catalyst and preparation method and its application in xylo-oligosaccharide is prepared |
| CN109225275A (en) * | 2018-11-06 | 2019-01-18 | 绍兴文理学院 | A kind of preparation method of carbon-based solid acid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102399201B (en) | Method for preparing 5-hydroxymethylfurfural by solid acid catalysis | |
| CN102321251B (en) | Method for separating xylogen from agricultural waste by using compound ion liquid | |
| CN102838453B (en) | Method to prepare phenolic organic mixture preparation by means of catalytic pyrolysis of biomass through coke | |
| CN104313195A (en) | Method for preparing xylooligosaccharide by degrading hemicellulose under carbonyl solid acid catalysis | |
| CN101402658B (en) | Method for thermal degradation of cellulose with ion liquid solvent catalysis | |
| CN101890364B (en) | Method of using agricultural and forestry waste to prepare solid-acid catalyst | |
| CN104671229A (en) | Method for preparing carbon microspheres through hydrothermal carbonization of biomass | |
| CN109529929B (en) | Sulfonated carbon-based solid acid microspheres, preparation method and hydrolysis method of cellulose or hemicellulose | |
| CN102250158B (en) | Method for preparing levoglucosenone | |
| CN107362810A (en) | A kind of magnetic mao bamboon charcoal solid acid catalyst and preparation method and its application in xylo-oligosaccharide is prepared | |
| CN106362804A (en) | Magnetic carbon-based solid acid catalyst as well as preparation method and application thereof | |
| Kim et al. | Valorization of chitosan into levulinic acid by hydrothermal catalytic conversion with methanesulfonic acid | |
| CN106824226A (en) | A kind of preparation method and its usage of carbon-based solid acid | |
| CN104894298A (en) | Method used for degrading lignocellulose with solid acid catalyst | |
| CN113088542A (en) | Biomass pretreatment process and method for recovering solvent used in treatment process | |
| CN108097312A (en) | A kind of preparation method and applications of lignocellulosic based solid acid catalyst | |
| CN105498801A (en) | Preparation method of sulfated carbonized corn cob catalyst and method for preparing furfural from xylose in presence of catalyst | |
| CN105330869A (en) | Hydrolysis method of wood fiber raw material | |
| CN104629062B (en) | Extracting method of fulvic acid in a kind of lignite | |
| CN101773840B (en) | Method for hydrothermal synthesis of carbon-silicon composite solid acid catalyst | |
| CN102059140B (en) | Carbon-based solid acid as well as preparation method and application thereof | |
| CN103896269B (en) | A kind of for removing the microwave radiation preparation of active carbon from coal of pyrene | |
| CN102321489B (en) | Method for catalyzing and liquefying agricultural wastes by using ion liquid | |
| CN102816187B (en) | Levoglucosenone preparation method | |
| CN102249224B (en) | Preparation method of activated carbon from livestock horns |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150128 |