CN109628652A - A method of xylose is prepared by the one step catalysis of hemicellulose in corn stover - Google Patents
A method of xylose is prepared by the one step catalysis of hemicellulose in corn stover Download PDFInfo
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- CN109628652A CN109628652A CN201811543196.3A CN201811543196A CN109628652A CN 109628652 A CN109628652 A CN 109628652A CN 201811543196 A CN201811543196 A CN 201811543196A CN 109628652 A CN109628652 A CN 109628652A
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- Prior art keywords
- xylose
- hemicellulose
- aluminum sulfate
- corn stover
- reaction
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- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 title claims abstract description 98
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 title claims abstract description 49
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 240000008042 Zea mays Species 0.000 title claims abstract description 32
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims abstract description 30
- 235000005822 corn Nutrition 0.000 title claims abstract description 30
- 229920002488 Hemicellulose Polymers 0.000 title claims abstract description 29
- 239000010907 stover Substances 0.000 title claims abstract description 28
- 238000006555 catalytic reaction Methods 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 59
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 10
- 239000012298 atmosphere Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- NPHFFBWJNRVQNH-UHFFFAOYSA-H NN.S(=O)(=O)([O-])[O-].[Al+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].[Al+3] Chemical group NN.S(=O)(=O)([O-])[O-].[Al+3].S(=O)(=O)([O-])[O-].S(=O)(=O)([O-])[O-].[Al+3] NPHFFBWJNRVQNH-UHFFFAOYSA-H 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 abstract description 13
- 239000001913 cellulose Substances 0.000 abstract description 13
- 229920005610 lignin Polymers 0.000 abstract description 12
- 239000002028 Biomass Substances 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 11
- 150000007522 mineralic acids Chemical class 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- AMVQGJHFDJVOOB-UHFFFAOYSA-H aluminium sulfate octadecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O AMVQGJHFDJVOOB-UHFFFAOYSA-H 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 241000609240 Ambelania acida Species 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 3
- 239000010905 bagasse Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 2
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 235000009973 maize Nutrition 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 241000501754 Astronotus ocellatus Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002972 pentoses Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
-
- 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 belongs to biomass recycling use fields, and in particular to a method of xylose is prepared by the one step catalysis of hemicellulose in corn stover.It is that single raw material sources prepare xylose with the hemicellulose in corn stover specifically using aluminum sulfate as catalyst.The present invention creatively uses aluminum sulfate with high selectivity only by the hemicellulose catalytic production xylose in corn stover, high conversion efficiency；With strong points, hardly the cellulose and lignin in catalyzed conversion corn stover, remain the structural intergrity of both substances in case he uses, while also avoiding generating other unwanted by-products, the xylose purity of acquisition is high.Reaction method of the present invention is simple, at low cost, can be widely applied in industrial production.
Description
Technical field
The invention belongs to biomass recycling use fields, and in particular to a kind of one step of hemicellulose by corn stover
The method that catalysis prepares xylose.
Background technique
With increasingly serious energy crisis and environmental pollution, it is high to develop and use reproducible wood fiber biomass preparation
Added value chemicals is extremely urgent.The maize straw resource very abundant in China, however this kind of renewable resource abundant is not
It is used effectively, the overwhelming majority is all incinerated, and causes the huge wasting of resources and environmental pollution.Therefore, it is necessary to develop one
The efficient cornstalk biological of kind refines industry.
Corn stover is a kind of typical biomass, mainly by the group grouping greatly of hemicellulose, cellulose and lignin three
At.In wood fiber biomass, hemicellulose is the second largest carbohydrate high polymer for constituting plant cell wall construction, is contained
Amount is only second to cellulose, typically constitutes from 15%~30%.Meanwhile xylose is a kind of typical pentose, and is bioanalysis fermentation
Utilize the important source material of lignocellulosic.Therefore using corn stover as reaction raw materials, it is selectively convertered its hemicellulose, is retained fine
Dimension element and lignin component, obtain xylose in high yield with high selectivity, are further obtained using xylose to the fermentation of subsequent bio method
High value-added product is of great significance.
In the prior art, generally all using inorganic acid as catalyst, by the hemicellulose reaction production xylose in stalk.Than
Such as, in the patent of Publication No. CN107267688A, using bagasse as raw material, by with acid solution after 50 DEG C of immersion 8h,
Obtained material utilizes mill grinding 10min, available 70% xylose under conditions of 0.3MPa steam is heated, pressurizeed
(quality based on hemicellulose in primary lignocellulosic).For another example, Oscar Oyola-Rivera etc. is in Biomass and
Report is using banana skin as raw material in Bioenergy119 (2018) 284-292,0.50wt%H2SO4For catalyst, 80:20wt%
GVL:H2O is reaction medium, is that 0.5K/min is raised to 490K with the rate of heat addition, available 41% xylose is (based on fine in raw material
The initial carbon molal quantity of dimension element and hemicellulose).But the use of inorganic acid is catalyst, there is certain corrosion to consersion unit
Property；And be difficult to recycle this part inorganic acid from reaction system, cause the waste of raw material；Inorganic acid is to people simultaneously
Class health and environment will also result in certain risk.
In addition, Zhang Hongdan etc. is reported in Bioresource Technology 249 (2018) 395-401,
With 0.025mol/L FeCl3For catalyst, bagasse, in 160 DEG C of processing 1h, can obtain 11.4% by 60% alcohol solvent
Xylose (Mass Calculation based on bagasse).This method is with FeCl3For catalyst, the shortcomings that having used inorganic acid is overcome, but
In the treatment process, while hemicellulose converts, lignin is also converted simultaneously, and obtained product liquid is by carboxylic
The complex mixture that acid, furans, phenols, carbohydrate and oligomer etc. collectively constitute, thus the selectivity of xylose is low, obtains purity
It is not high.
Either with inorganic acid or FeCl3As catalyst, while hemicellulose converts, cellulose and/or wooden
Plain component can also be converted.On the one hand, the conversion of cellulose and lignin to the generation of xylose not only without facilitation,
It will affect the positive progress for generating xylose reaction；A series of by-products can be also generated, influence the purity of target product xylose, finally
It also carries out the processing such as purifying.On the other hand, such methods destroy the structure of cellulose and lignin, do not efficiently use
Cellulose and lignin cause a large amount of wasting of resources.
Therefore, it develops a kind of low in cost, environmentally protective, and orients, efficiently only utilizes the hemicellulose in corn stover
The method that element generates xylose, has important practical significance.
Summary of the invention
The object of the present invention is to provide a kind of low in cost, environmentally protective, and orient, efficiently utilizes half in corn stover
The method of cellulose generation xylose.
For achieving the above object, the technical scheme adopted by the invention is that: a method of xylose is prepared, with stalk
In hemicellulose be single raw material sources prepare xylose.It should be understood that being the orientation directly using stalk as raw material herein
The hemicellulose in stalk is utilized；It is not raw material with the pure hemicellulose commercially extracted from corn stover.This hair
It is bright to be more advantageous to the resource utilization for realizing agriculture waste biomass directly with protist matter (stalk) for starting material, from
And realize commercial introduction.
Preferably, using aluminum sulfate as catalyst.
Preferably, the aluminum sulfate is hydrazine aluminum sulfate.
Preferably, the method specifically: by stalk, aluminum sulfate and react required water mixing, be placed in the indifferent gas
In body atmosphere, 0~4h is reacted again after 0.3~0.6h rises to 100~180 DEG C by room temperature.
Preferably, in mass ratio, the stalk: aluminum sulfate=20:1~5.
Preferably, in mass ratio, the stalk: aluminum sulfate=20:3~5.
Preferably, the reaction temperature is 130 DEG C~140 DEG C, and/or, the reaction time is 0.5~4h.
Preferably, the atmosphere of inert gases is nitrogen atmosphere.
Preferably, the initial pressure of the atmosphere of inert gases is 2MPa.
Preferably, the stalk is corn stover.
The invention has the following advantages:
1, the equal abundance of raw material, cheap and easy to get that the present invention uses.Corn stover is the common abandoned biomass of agricultural,
Turned waste into wealth, can effectively solve the problems, such as environmental pollution and the wasting of resources.Hydrazine aluminum sulfate is common cheap chemicals,
Catalytic activity is high, environmental-friendly, effectively prevents the corrosion such as previous catalyst such as inorganic acid equipment, is not easy to asking for subsequent processing
Topic.
2, the present invention is creatively using aluminum sulfate with high selectivity only by the hemicellulose catalytic production in corn stover
Xylose, high conversion efficiency；With strong points, hardly the cellulose and lignin in catalyzed conversion corn stover, remain this
The structural intergrity of two kinds of substances is in case he uses, while also avoiding generating other unwanted by-products, the xylose purity of acquisition
It is high.
3, reaction method of the present invention is simple, at low cost, can be widely applied in industrial production.
Specific embodiment
Specific reaction method of the invention are as follows: by corn straw smashing, 40~100 meshes are crossed, are placed in autoclave,
Take water as a solvent with reaction medium (in mass ratio, water: corn stover=100:1~10), using aluminum sulfate as catalyst.Setting is anti-
Answering in kettle initial pressure is 2MPa, nitrogen atmosphere, by room temperature quickly, be at the uniform velocity warming up to 100~180 DEG C, total heating-up time is 0.3
~0.6h reaches after target temperature 0~4h of confined reaction again.
After reaction, it is quickly cooled down reaction kettle with flowing water shower, is cooled to room temperature to reaction kettle, collect product in kettle,
It filters separation acquisition solid residue and liquid, the liquid is required product.
Wherein, in mass ratio, the corn stover: aluminum sulfate=20:1~5, preferably 20:3~5.Addition of aluminum sulfate mistake
It is low, it will affect the conversion ratio of hemicellulose, to influence the yield of xylose；Dosage is excessively high, wastes raw material.The aluminum sulfate
Preferably hydrazine aluminum sulfate, compared with aluminum sulfate, hydrazine aluminum sulfate is more common to be easy to get, and price is also less expensive, and is hydrated sulphur
The presence of the crystallization water is more favorable to the positive progress of reaction in sour aluminium.
Reaction temperature of the invention is preferably 130 DEG C~140 DEG C.When reaction temperature is lower than 130 DEG C, half fiber in corn stover
The conversion ratio for tieing up element is lower, and the xylose yield because obtained from is lower.When reaction temperature is higher than 140 DEG C, although in corn stover
Hemicellulose can be almost completely dissolved, but can also be made a part of cellulose and lignin while be converted.Moreover, with temperature
The raising of degree, the xylose of generation can further be converted into small molecule product such as furfural, formic acid and acetic acid etc. or occur to gather again
Reaction, to reduce the yield of xylose.
Reaction time of the invention is preferably 0.5~4h.Reaction time is too short, when being lower than 0.5h, the conversion of hemicellulose
Rate only has 60% or so, causes the yield of xylose relatively low.Reaction time extends, and hemicellulose conversion ratio increases, the yield of xylose
It is consequently increased.In 0.5~4h, the conversion ratio of hemicellulose is continuously maintained in 90% or so, and the yield of xylose is also relatively steady
It is fixed.Extend the reaction time again, might have other side reactions.
The present invention is further explained combined with specific embodiments below.Wherein, the corn stover in embodiment comes from
Sichuan Province, Shuangliu County, Chengdu, corn stover crushed 40 meshes.After measured, 17.5wt% half is contained in maize straw powder
Cellulose, 36.5wt% cellulose, 20.9wt% lignin, 8.2wt% moisture, 3.5wt% wax, 5.8wt% ash content and
7.6wt% other materials.
Embodiment 1: the influence of reaction temperature
1, in addition to target temperature is different, 6 groups of reactions are carried out under the same conditions.It is beautiful that 4g is added in the autoclave of 150mL
Rice stalk powder and 100mL water.Reaction kettle is sealed, with the air in nitrogen displacement kettle, adjusts the initial pressure of nitrogen in reaction kettle
Power is 2.0MPa, and maintenance mixing speed is 400rpm.Reactor is in 0.5h, from room temperature constant-speed heating to target temperature, i.e., 120
~200 DEG C, then 2h is kept in target temperature.After reaction, with the cooling reaction of the quick shower of circulating water.It is cooling to reaction system
To room temperature, mixture in reaction kettle is poured out, isolated solid residue and product liquid are filtered by using filter paper.
Solid residue is used to calculate the content of three big components in the conversion ratio and corn stover of raw material.Three is big in corn stover
The content of component uses normal form titration measuring.Contained according to three big components in the corn stover measured under the conditions of different disposal
Amount calculates the conversion ratio of three big components under corresponding conditions.Product liquid uses efficient liquid phase chromatographic analysis.Wherein xylose yield base
Hemicellulose level calculates in corn stover.Concrete outcome is as shown in table 1.
1 each group reaction result table of table
2, in addition to test temperature and reaction raw materials, remaining is identical with step 1.The reaction raw materials of this step are as follows: 4g corn
Stalk powder, 100mL water and 1g aluminum sulfate octadecahydrate.Because catalyst is added in this step, required initial reaction temperature is more
Low, so having carried out corresponding adjustment to test temperature, specific each group temperature and result are referring to table 2.
2 each group reaction result table of table
As can be seen from Table 1 and Table 2, when not having catalyst, xylose yield highest at 180 DEG C is 14.1%；And 130
DEG C when, the conversion ratio of hemicellulose only has 36.1%；When having catalyst, xylose yield reaches highest at 130 DEG C, is
61.2%, and hemicellulose conversion ratio at this time has reached 90.8%.
Embodiment 2: the influence of catalyst
Carry out following 20 groups of reactions by the method for example 1 group 10 and group 11, the type of each group catalyst, reaction temperature and
The results are shown in Table 3.Because the catalyst of test is excessive, so every group of reaction time is 2h, it is only displaying each group catalyst
Effect does not show optimum reacting time.Wherein with H2SO4(pH=3.24) it is catalyst, contains 1g in this pH value and 100mL water
PH value after aluminum sulfate octadecahydrate is completely dissolved is identical.With H2SO4(pH=1.35) it is catalyst, contains in this pH value and 100mL water
The pH value that 1g aluminum sulfate octadecahydrate complete hydrolysis generates sulfuric acid is identical.
3 each group reaction result table of table
From table 3 it can be seen that the xylose yield ratio obtained using ferric trichloride is slightly higher using aluminum sulfate, but its fiber simultaneously
The conversion ratio when conversion ratio of element and lignin is much higher than using aluminum sulfate.This explanation, the product obtained using ferric trichloride is more
Add complexity, to the purification of later period target product, utilizes etc. and to bring bigger difficulty.Remaining catalyst such as sulfuric acid etc., effect is obvious
Not as good as aluminum sulfate.
In addition, at relatively high temperatures, when making catalyst using aluminum sulfate, the conversion ratio of cellulose and lignin also on
It rises, it is advantageous to lower temperature to be reacted.
As can also be seen from Table 3, in higher temperature, make catalyst using aluminum sulfate, the yield of xylose is relatively low, this be because
For at such a temperature, the xylose that aluminum sulfate as catalyst generates further has been converted into other products, it was demonstrated that aluminum sulfate is directed to stalk
In hemicellulose catalytic activity it is higher than other catalyst, also demonstrate again that using aluminum sulfate as catalyst, if it is desired to being directed to
Property obtain xylose, need to select lower temperature.
Embodiment 3: the influence of catalyst amount
It is reacted by the method for example 1 group 9, reaction time 0.5h, carries out 6 groups of reactions, each group catalyst type
With dosage and the results are shown in Table 5.
4 each group reaction result table of table
Embodiment 4: the influence in reaction time
1,5 groups of reactions are carried out by the method for example 1 group 5 (reaction temperature is 180 DEG C), each group reaction time is respectively 0
~4h.Concrete outcome is as shown in table 5.
5 each group reaction result table of table
2, it is reacted by the method for step 1, but reaction temperature selects 130 DEG C, 4g corn stover is added in a kettle
Powder, 100mL water and 1g aluminum sulfate octadecahydrate, then carry out 5 groups of reactions.The results are shown in Table 6.
6 each group reaction result table of table
Claims (10)
1. a kind of method for preparing xylose, it is characterised in that: prepare xylose with the hemicellulose in stalk for single raw material sources.
2. the method according to claim 1 for preparing xylose, it is characterised in that: using aluminum sulfate as catalyst.
3. the method according to claim 2 for preparing xylose, it is characterised in that: the aluminum sulfate is hydrazine aluminum sulfate.
4. preparing the method for xylose according to Claims 2 or 3 any one, it is characterised in that: the method specifically:
By stalk, aluminum sulfate and required water mixing is reacted, is placed in atmosphere of inert gases, rises to 100 by room temperature in 0.3~0.6h
After~180 DEG C, then react 0~4h.
5. the method according to claim 4 for preparing xylose, it is characterised in that: in mass ratio, the stalk: aluminum sulfate=
20:1~5.
6. the method according to claim 5 for preparing xylose, it is characterised in that: in mass ratio, the stalk: aluminum sulfate=
20:3~5.
7. the method according to claim 4 for preparing xylose, it is characterised in that: the reaction temperature is 130 DEG C~140
DEG C, and/or, the reaction time is 0.5~4h.
8. the method according to claim 4 for preparing xylose, it is characterised in that: the atmosphere of inert gases is nitrogen atmosphere
It encloses.
9. the method according to claim 4 for preparing xylose, it is characterised in that: the initial pressure of the atmosphere of inert gases
For 2MPa.
10. the method according to claim 1 for preparing xylose, it is characterised in that: the stalk is corn stover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543196.3A CN109628652B (en) | 2018-12-17 | 2018-12-17 | Method for preparing xylose by one-step catalysis of hemicellulose in corn straws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811543196.3A CN109628652B (en) | 2018-12-17 | 2018-12-17 | Method for preparing xylose by one-step catalysis of hemicellulose in corn straws |
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| Publication Number | Publication Date |
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| CN109628652A true CN109628652A (en) | 2019-04-16 |
| CN109628652B CN109628652B (en) | 2022-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996295A (en) * | 2020-09-08 | 2020-11-27 | 沈阳航空航天大学 | Method for preparing xylose from straws by acid method pretreatment combined with centrifugal method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110192560A1 (en) * | 2008-10-21 | 2011-08-11 | Danisco A/S | Process of producing xylose and dissolving pulp |
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| US20110192560A1 (en) * | 2008-10-21 | 2011-08-11 | Danisco A/S | Process of producing xylose and dissolving pulp |
| CN105713050A (en) * | 2016-01-21 | 2016-06-29 | 河南农业大学 | Method for selectively degrading cob hemicellulose to increase xylose yield |
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| CN111996295A (en) * | 2020-09-08 | 2020-11-27 | 沈阳航空航天大学 | Method for preparing xylose from straws by acid method pretreatment combined with centrifugal method |
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