CN109306362A - A method of based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum - Google Patents
A method of based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum Download PDFInfo
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- CN109306362A CN109306362A CN201710625197.1A CN201710625197A CN109306362A CN 109306362 A CN109306362 A CN 109306362A CN 201710625197 A CN201710625197 A CN 201710625197A CN 109306362 A CN109306362 A CN 109306362A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
- C12P7/06—Ethanol, i.e. non-beverage
- C12P7/08—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate
- C12P7/10—Ethanol, i.e. non-beverage produced as by-product or from waste or cellulosic material substrate substrate containing cellulosic material
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/02—Monosaccharides
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P2201/00—Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis
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- 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
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Abstract
The invention discloses a kind of methods based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum, the present invention after sugar grass is crushed the following steps are included: soak in water, the separation of juice slag, filtrate is condensed into syrup, enzymolysis liquid is obtained after washing by filter residue progress alcohol, aoxidize, digest, it is mixed into post-fermentation with syrup and obtains ethyl alcohol.Process of the present invention is simple, and low energy consumption, is able to satisfy the demand of large-scale production.
Description
Technical field
The present invention relates to biological chemical fields, in particular to utilize the method for preparing ethyl alcohol from sweet sorghum.
Technical background
With the exhaustive exploitation and use, energy crisis and environmental problem of the non-renewable resources such as petroleum, natural gas coal
Become increasingly conspicuous, energy-saving and emission-reduction and the comprehensive utilization of renewable resource is become at present as whole world problem of interest.Mesh
Before, China mainly prepares ethyl alcohol using the grains such as corn class as raw material, however China human mortality it is numerous using corn grain class as raw material at
Ben Taigao, and there is the case where striving grain with people.Ethyl alcohol is produced using sugar grass as raw material can very strong advantage.Sugar grass is raw
Produce vigorous, yield is very high, adaptable, cold-resistant, waterlogging, saline-alkali tolerant.Therefore, selecting sugar grass as the raw material for preparing ethyl alcohol is
One of most appropriate crop.
Currently, China is mature by the technology of preparing ethyl alcohol from sweet sorghum, but it is high still to there is raw material i.e. sweet tea mostly
Fine strain of millet storage is improper, leads to that yield is high, energy consumption is excessively high in preparation process and noxious emission environmental pollution.
A kind of method of preparing ethyl alcohol from sweet sorghum is provided in CN103773814A, be in this method by sugar grass expression separation at juice,
Juice is concentrated slag, and slag adds cellulase degradation after olefin(e) acid Steam explosion treatment, then will be after concentration molasses mix with enzymolysis liquid
The ethyl alcohol of fermentation.The defect of this method is that pressure is needed to reach 30-60MPa, the bar slag process after processing squeezing in expressing process
It is related to steam blasting, makes this method energy consumption excessively high.A kind of side of preparing ethyl alcohol from sweet sorghum is provided in CN102154380A
Method, this method is by squeezing sugar grass, the separation of juice slag, filters to take sweet sorghum slag after olefin(e) acid-ultrasonication bar slag, digests institute
It obtains sweet sorghum slag and obtains enzymolysis liquid, then juice mixed fermentation is obtained into ethyl alcohol.Although this method does not take the energy consumptions such as steam blasting high
Mode, but due to needing to use ultrasonication, in industrialization large-scale production, ultrasonication cannot be but applicable in.
A kind of method that fresh sugar grass prepares alcohol fuel is also provided in CN106222207A, method is directly by stalk disintegrating
After digest and ferment again, by distilling to obtain ethyl alcohol.Although this method process is simple, mild condition, its gained ethanol yield is not high.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of sides based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum
Method, this method is able to satisfy the demand of the production of large-scale, environmentally protective, and yield greatly improves.
In order to achieve the above objectives, the technical solution of the present invention is as follows:
Method based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum, comprising the following steps:
(1) sugar grass is smashed, immersion is heated in water, is obtained juice, slag mixture, is separated by solid-liquid separation to obtain filtrate, filter residue；
(2) filtrate of acquisition is concentrated to give syrup；
(3) alcoholic solution that volumetric concentration is 30%-80% is added in gained filter residue into step 1), additional amount is equivalent to mixed
10-50 times of object is closed, is reacted at least 30 minutes under heating condition, separation of solid and liquid takes filter residue；
(4) filter residue carries out oxidation processes and obtains cellulose mixed liquor, dilute acid for adjusting pH value to 4-5.5, and separation of solid and liquid takes solid,
Mixed enzyme enzyme enzymatic hydrolysis is added, obtains enzymolysis liquid after the completion of enzymatic hydrolysis；
(5) syrup is proportionally added into enzymolysis liquid obtained in (4), yeast is added and ferments to obtain ethyl alcohol.
In the present invention, using water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum, first it is soaked in water after directly crushing sugar grass,
It heats, the bacterial micro-organisms for being largely unfavorable for postorder fermentation can be removed, and the partial size crushed impregnates and adds in water less than 10 mesh
The time of heat is 10-30 minutes, obtains juice, slag obtains mixture, filtrate, filter residue is filtered by vacuum to obtain.
Further, obtained filtrate is condensed into syrup, the volumetric concentration of the syrup is 10-30%.
Further, alcoholic solution, volumetric concentration 30%-80% are added into filter residue, additional amount is filter residue volume
10-50 times, react at least 30 minutes or more under heating condition, be then down to 40-50 DEG C, be filtered by vacuum to obtain filtrate and filter
Slag, filtering the time is 5-30 minutes.
Further, obtained filter residue is further processed, i.e. addition oxidant reaction, the reaction time is no less than 30
Minute, additional amount is 10-35 times of filter residue volume, and the oxidant is specially sulfurous acid, iron chloride, nitrous acid, hydrogen peroxide,
Hypochlorous acid, sodium dichromate, potassium permanganate are any one or more of to be mixed, and concentration is not less than 5%.After the reaction was completed, it uses
Diluted acid adjusts the pH value of reaction solution to 4-5.5, is filtered by vacuum and takes solid, filters the time at 5-30 minutes, then to resulting solid
Mixed enzyme enzymatic hydrolysis is added in body.Mixed enzyme is made of cellulase, hemicellulase, pectase, mass ratio 1:2:1, is adjusted
Section pH value is maintained at 4.8-5.4, and stirring rate 60-200r/min digests 30-105h under the conditions of 45-50 DEG C, obtains in this way
Cellulose solids can more fully digest, improve the yield of ethyl alcohol to a certain extent.
Further, the syrup that volumetric concentration is 10-30% will be condensed into mix with enzymolysis liquid, obtains syrup mixed liquor, presses
The calcium chloride dihydrate of 8g/L urea, the epsom salt of 3g/L, 6g/L, the addition of yeast starter liquid is added in the volume of mixed liquor
Amount be similarly dependent on syrup mixed liquor, be its volume 10%-15%, after all raw materials have been added, adjusting pH value 4.5-5 it
Between, sealing temperature controlled is at 20-35 DEG C, and ferment 35-45h.Finally, the resulting ethyl alcohol that ferments is collected in distillation.
The present invention is based on the beneficial effects of the method for water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum to be: (1) in sugar grass
Pretreatment in without using the processing methods such as high-pressure compressing and ultrasonic wave, but use crush after be directly soaked in water plus alcohol
The method washed reduces the high request to energy consumption and equipment；(2) a large amount of fibers in sugar grass are extracted using water alcohol oxidant
Element, obtained cellulose purity is high, and impurity is few, and the utilization rate of sugar grass is high, so that the resulting ethanol yield of subsequent fermentation is significantly
It improves；(3) mixed enzyme selection is made of cellulase, hemicellulase, pectase, and pectase can hydrolyze outside cell wall
The pectin of layer, is more conducive to the entrance of hemicellulase and cellulase in this way.Hemicellulase can with hydrolyzed hemicellulose,
Cellulase further is expanded close to the channel of cellulose, and cellulose is allowed more fully to be hydrolyzed into glucose,
To improve the yield of ethyl alcohol.(4) this method is easy to operate, can continuous production, environmental pollution is small, and at low cost, has wide
Wealthy market prospects and huge industrial production potentiality.
Specific embodiment
Embodiment 1
500g sugar grass is taken, is directly ground into crushed material of the partial size less than 10 mesh with pulverizer, immersion heats 30 in water
Minute, separation of solid and liquid obtains filtrate and filter residue, and filtrate is condensed into the syrup that volumetric concentration is 15%, volume is added into filter residue
The alcoholic solution that concentration is 40%, additional amount are 15 times of filter residue volume, and heating reaction 30 minutes is cooled to 45 DEG C, are filtered to take solid
Body, the sulfurous acid solution that volumetric concentration is 10% is added into obtained solid, and heating reaction 45 minutes is filtered after the reaction was completed
Obtain solid 287.6g, content of cellulose 73.6%.
The hemicellulase 200g of the cellulase 100g, 2IU/g of 10IU/g is added after to oxidation in resulting solid,
The pectase 100g of 15IU/g is digested, and 45 DEG C of reaction temperature, pH value 5.0, stirring rate 100r/min, the reaction time
72h obtains enzyme digestion reaction liquid after the reaction was completed.Syrup is mixed into obtain mixed liquor with enzyme digestion reaction liquid, 8g/L is added into mixed liquor
Urea, the epsom salt of 3g/L, 6g/L calcium chloride dihydrate, the additional amount of yeast starter liquid be similarly dependent on syrup mixing
Liquid is the 10% of its volume, after all raw materials have been added, adjusts pH value between 4.5-5, sealing temperature controlled is at 25 DEG C, fermentation
40h.Finally, the resulting ethyl alcohol that ferments is collected in distillation, ethyl alcohol 41.8g is obtained.
Embodiment 2
500g sugar grass is taken, is directly ground into crushed material of the partial size less than 10 mesh with pulverizer, immersion heats 30 in water
Minute, separation of solid and liquid obtains filtrate and filter residue, and filtrate is condensed into the syrup that volumetric concentration is 15%, volume is added into filter residue
The alcoholic solution that concentration is 40%, additional amount are 15 times of filter residue volume, and heating reaction 30 minutes is cooled to 45 DEG C, are filtered to take solid
Body, the sulfurous acid solution that volumetric concentration is 10% is added into obtained solid, and heating reaction 45 minutes is filtered after the reaction was completed
Obtain solid 285.4g, content of cellulose 72.9%.
10IU/g cellulase 100g is added after to oxidation in resulting solid, is digested, 45 DEG C of reaction temperature, pH
Value 5.0, stirring rate 100r/min, reaction time 72h obtain enzyme digestion reaction liquid after the reaction was completed.By syrup and enzyme digestion reaction liquid
Mixed liquor is mixed to obtain, the calcium chloride dihydrate of 8g/L urea, the epsom salt of 3g/L, 6g/L, yeast kind are added into mixed liquor
The additional amount of sub- liquid is similarly dependent on syrup mixed liquor, is the 10% of its volume, after all raw materials have been added, adjust pH value and exists
Between 4.5-5, sealing temperature controlled is at 25 DEG C, and ferment 40h.Finally, the resulting ethyl alcohol that ferments is collected in distillation, ethyl alcohol 34.1g is obtained.
Embodiment 3
500g sugar grass is taken, is directly ground into crushed material of the partial size less than 10 mesh with pulverizer, immersion heats 45 in water
Minute, separation of solid and liquid obtains filtrate and filter residue, and filtrate is condensed into the syrup that volumetric concentration is 15%, volume is added into filter residue
The alcoholic solution that concentration is 45%, additional amount are 15 times of filter residue volume, and heating reaction 30 minutes is cooled to 45 DEG C, are filtered to take solid
Body, the hydrogenperoxide steam generator that volumetric concentration is 10% is added into obtained solid, and 45 minutes, after the reaction was completed, mistake are reacted in heating
Filter to obtain solid 293.5g, content of cellulose 74.3%.
The hemicellulase 100g of the cellulase 50g, 5IU/g of 45IU/g is added after to oxidation in resulting solid,
The pectase 50g of 40IU/g is digested, and 45 DEG C of reaction temperature, pH value 5.0, stirring rate 120r/min, reaction time 72h,
After the reaction was completed, enzyme digestion reaction liquid is obtained.Syrup is mixed into obtain mixed liquor with enzyme digestion reaction liquid, 8g/L urine is added into mixed liquor
The calcium chloride dihydrate of element, the epsom salt of 3g/L, 6g/L, the additional amount of yeast starter liquid are similarly dependent on syrup mixed liquor,
It is the 10% of its volume, after all raw materials have been added, adjusts pH value between 4.5-5, sealing temperature controlled is at 30 DEG C, and ferment 45h.
Finally, the resulting ethyl alcohol that ferments is collected in distillation, ethyl alcohol 43.6g is obtained.
Embodiment 4
500g sugar grass is taken, is directly ground into crushed material of the partial size less than 10 mesh with pulverizer, immersion heats 30 in water
Minute, separation of solid and liquid obtains filtrate and filter residue, and filtrate is condensed into the syrup that volumetric concentration is 15%.
The hemicellulose of the cellulase 50g, 5IU/g of 45IU/g are added into the filter residue for not washing oxidation processes by alcohol
The pectase 50g of enzyme 100g, 40IU/g are digested, and 45 DEG C of reaction temperature, pH value 5.0, stirring rate 120r/min, when reaction
Between 72h obtain enzyme digestion reaction liquid after the reaction was completed.Syrup is mixed into obtain mixed liquor with enzyme digestion reaction liquid, is added into mixed liquor
8g/L urea, the epsom salt of 3g/L, 6g/L calcium chloride dihydrate, it is mixed that the additional amount of yeast starter liquid is similarly dependent on syrup
Liquid is closed, is the 10% of its volume, after all raw materials have been added, adjusts pH value between 4.5-5, sealing temperature controlled is at 30 DEG C, hair
Ferment 45h.Finally, the resulting ethyl alcohol that ferments is collected in distillation, ethyl alcohol 31.2g is obtained.
Claims (8)
1. a kind of method based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum, which is characterized in that specifically includes the following steps:
1) sugar grass is smashed, immersion is heated in water, is obtained juice, slag mixture, is separated by solid-liquid separation to obtain filtrate, filter residue；2) by step
1) filtrate obtained in is concentrated to give syrup；
3) alcoholic solution that volumetric concentration is 30%-80% is added in gained filter residue into step 1), additional amount is equivalent to mixture
10-50 times of weight reacts at least 30 minutes under heating condition, is separated by solid-liquid separation, takes filter residue；
4) filter residue obtained by step 3) is subjected to oxidation processes and obtains cellulose mixed liquor, dilute acid for adjusting pH value to 4-5.5 is separated by solid-liquid separation
Solid is taken, mixed enzyme enzymatic hydrolysis is added, obtains enzymolysis liquid after the completion of enzymatic hydrolysis；
5) the resulting syrup of step 2 is proportionally added into enzymolysis liquid obtained in 4), yeast is added and ferments to obtain ethyl alcohol.
2. according to the method described in claim 1, it is characterized by: the powder particle diameter of the sugar grass is less than 10 in step 1)
Mesh, immersion are heated in water, and for control temperature at 80-100 DEG C, the time is 10-30 minutes.
3. according to the method described in claim 1, it is characterized by: the volumetric concentration of the syrup is 10- in step 2)
30%.
4. according to the method described in claim 1, it is characterized by: the oxidation processes are specially to be added quite in step 4)
It is not less than 5% oxidant in 10-35 times of percentage by volume of filter residue volume, at least half an hour is reacted under the conditions of 30-90 DEG C,
The diluted acid include hydrochloric acid, sulfuric acid, phosphoric acid it is one or more.
5. according to the method described in claim 1, it is characterized by: step 2) with solid-liquid separation method described in step 4) is true
Empty pump filter, filtering the time is 5-30 minutes.
6. according to the method described in claim 1, it is characterized by: the mixed enzyme is by cellulase, hemicellulose in step 4)
Plain enzyme, pectase composition, cellulase, hemicellulase, pectase mass ratio be 1:2:1.
7. according to the method described in claim 1, it is characterized by: addition mixed enzyme enzymatic hydrolysis is specially to adjust pH value to keep
30-105h is digested under the conditions of 45-50 DEG C in 4.8-5.4, stirring rate 60-200r/min.
8. according to the method described in claim 1, it is characterized by: the fermentation is to be added into the enzymolysis liquid after mixing syrup
Urea, epsom salt, calcium chloride dihydrate, yeast starter liquid, sealing temperature controlled ferment 35-45h at 20-35 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710625197.1A CN109306362A (en) | 2017-07-27 | 2017-07-27 | A method of based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum |
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| CN201710625197.1A CN109306362A (en) | 2017-07-27 | 2017-07-27 | A method of based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum |
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| CN201710625197.1A Withdrawn CN109306362A (en) | 2017-07-27 | 2017-07-27 | A method of based on water alcohol oxidizing process preparing ethyl alcohol from sweet sorghum |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733217A (en) * | 2012-02-23 | 2012-10-17 | 重庆恒远晋通科技有限公司 | Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process |
| CN103773814A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing alcohol from sugar sorghum |
-
2017
- 2017-07-27 CN CN201710625197.1A patent/CN109306362A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733217A (en) * | 2012-02-23 | 2012-10-17 | 重庆恒远晋通科技有限公司 | Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process |
| CN103773814A (en) * | 2012-10-23 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing alcohol from sugar sorghum |
Non-Patent Citations (2)
| Title |
|---|
| SOHA R.A. KHALIL等: "Evaluation of bioethanol production from juice and bagasse of some sweet sorghum varieties", 《ANNALS OF AGRICULTURAL SCIENCE》 * |
| 王闻等: "混合酶对经不同预处理的甜高粱秆渣的水解", 《农业工程学报》 * |
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Application publication date: 20190205 |