CN101003955B - Technology for pretreating raw material of plant fiber by soft alkali / oxidation process, and solvent cyclic utilization - Google Patents
Technology for pretreating raw material of plant fiber by soft alkali / oxidation process, and solvent cyclic utilization Download PDFInfo
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- CN101003955B CN101003955B CN200710062808A CN200710062808A CN101003955B CN 101003955 B CN101003955 B CN 101003955B CN 200710062808 A CN200710062808 A CN 200710062808A CN 200710062808 A CN200710062808 A CN 200710062808A CN 101003955 B CN101003955 B CN 101003955B
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- plant fiber
- raw material
- alkali
- pretreatment
- bagasse
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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
Abstract
The present invention discloses a plant fiber raw material mild alkali/oxidation pretreatment and circulating utilization process of pretreatment liquor, belonging to the field of biological energy source and green chemical engineering technology. It is characterized by that said process includes the following steps: using solution containing alkali and H2O2 as pretreatment liquor, in which H2O2 is oxidation agent; making plant fiber undergo the processes of cutting and removing dust, then adding said plant fiber into a pretreatment tank according to a certain solid-liquid ratio, in the pretreatment tank making the plant fiber undergo the process of alkali oxidation water pretreatment with a certain temperature for a certain period of time, then making the plant fiber be fed into spray rinsing chamber, spray rinsing, then feeding plant fiber raw material into hydrolysis tank, and making hydrolysis, colleting residual alkali oxidation water obtained by washing plant fiber raw material and pumping the alkali oxidation water into pretreatment tank to make secondary circulating utilization. Within a certain cycle index, only clean water and solutes need to be supplied, while sewage is not discharged to the outside. The process is simple in equipment, good in bagasse treatment effect, wild in reaction conditions, easy to control and low in cost, which has a good industrial prospect.
Description
Technical field
The invention belongs to bioenergy and green chemical industry field, relate to a plant fiber raw material irenine/oxidation pre-treatment and solvent recycle and utilize technology.
Plant fiber material is the abundantest on the earth, the most cheap renewable resource.Have data to show, the annual plant growing amount in the whole world is up to 1.55 * 10
11The ton dry, wherein the total amount of cellulose, hemicellulose is about 8.5 * 10
10Ton.China is a large agricultural country; If can be hydrolyzed into glucose to a large amount of agricultural fibre raw materials and the cellulose in the industrial fiber waste material cost-effectively; And be further used for the production of bio-fuel ethanol, organic acid and antibiotic etc.; It is nervous that this will help improving present resource, and the situation of ecological deterioration realizes that to human society sustainable development has important economy and social effect.
The preliminary treatment of plant fiber material is an important step of utilizing the cellulase hydrolysis saccharification, is one of important restraining factors of enzymolysis economy.Usually raw material pretreated method mainly contains the combination of physics method (ball milling, radiation, vapour are quick-fried etc.), chemical method (alkali, acid, organic solvent etc.), bioanalysis (whiterot fungi, brown rot fungus, soft-rot fungi etc.) or these methods etc.; Like document 1) " wine brewing; 2005,32 (3): 41-42 " in, Liu Yuanyang; Shen Dechao, " producing some discussions of fuel alcohol pretreating process about cellulosic material "; Document 2) SidirasD., Koukios E..Simulation of acid-catalysed organosolv fractionation of wheat straw.Bioresource Technology, 2004,94 (1): 91-98; Document 3) " regenerative resource, 2005, (121): 33-35 " Pan Yajie, " study on biological degrading of crops straw " of Zhang Lei etc., however the physics method can only play the effect of loose its structure to a certain extent to plant fiber material; Though chemical method is as adopting pretreating effects such as acid or alkali better, waste liquids such as soda acid have caused serious pollution to environment; Bioanalysis is a kind of eco-friendly processing mode, but the processing cycle is longer, is unfavorable for industrialization.Comparatively speaking, if electroplating effluent recycling and using can reduce environmental pollution, will have the industrial applications prospect.Therefore, the present invention as plant fiber material, adopts irenine/oxidizing process preliminary treatment with bagasse, through to the preliminary treatment solvent recycling, can effectively improve pretreating effect and cellulosic enzymolysis performance, and reduces environmental pollution.With bagasse is that raw material carries out irenine/oxidizing process preliminary treatment, and the preliminary treatment solvent is carried out recycle, and Shang Weijian has bibliographical information.
Summary of the invention
The purpose of this invention is to provide a plant fiber raw material irenine/oxidation pre-treatment and pretreatment fluid is carried out utilization process.It is characterized in that concrete processing step is:
(1) plant fiber material through cutting, be ground into 20～40 purpose slags, and dedusting:
(2) the alkali oxidize water is for containing alkali and H
2O
2Solution, its concentration is 0.1%～5%, H
2O
2Concentration be 0.2%～3%, be mass fraction.
(3) pretreatment temperature is 15 ℃～50 ℃.
(4) pretreatment time is 5～40 hours.
(5) liquid-solid ratio of alkali oxidize water and plant fiber material is 10: 1～45: 1;
(6) pretreatment fluid recycle, the cycle-index of alkali oxidize water are 2～10 times, in certain cycle-index, only need to replenish clear water and solute, and externally discharged waste water not.
Used plant fiber material is stalk, bagasse, straw or sorghum stalk.
Said alkali is NaOH, KOH or CaO.
The invention has the beneficial effects as follows: this pretreating process is compared with traditional electroplating effluent recycling and using; Process equipment is simple; Treatment effect is good, and raw material is flooded in the alkali oxidize water evenly, fully, can remove most lignin and hemicellulose; Cellulose loss is very little simultaneously, increases substantially the enzymolysis performance of raw material.In addition, these process conditions are gentle, be easy to control, reduced production cost, and pretreatment fluid can reuse, and reduce environmental pollution.Be easy to industrial applications.
The specific embodiment
The present invention provides a plant fiber raw material irenine/oxidation pre-treatment and pretreatment fluid is carried out utilization process.Below in conjunction with embodiment the present invention is further specified.
Embodiment 1
With mass fraction 1.0% NaOH and 0.6%H
2O
2Being pretreatment fluid, is raw material with 20～40 purpose bagasse, and liquid-solid ratio is 20: 1, handles 16 hours down for 30 ℃, and bagasse lignin removing rate is 64.3%, and the hemicellulose clearance is 29.8%.
Embodiment 2
With mass fraction 1.0% NaOH and 0.9%H
2O
2Be pretreatment fluid, 20～40 purpose bagasse are raw material, and liquid-solid ratio is 15: 1, handle 24 hours down for 30 ℃, and bagasse lignin removing rate is 66.6%, and the hemicellulose clearance is 19.8%.
Embodiment 3
With mass fraction 1.0% NaOH and 0.6%H
2O
2Be pretreatment fluid, 20～40 purpose bagasse are raw material, and liquid-solid ratio is 25: 1, handle 24 hours down for 35 ℃, and bagasse lignin removing rate is 81.6%, and the hemicellulose clearance is 30.6%.
Embodiment 4
With mass fraction 1.0% KOH and 0.8%H
2O
2Be pretreatment fluid, 20～40 purpose bagasse are raw material, and liquid-solid ratio is 35: 1, handle 24 hours down for 40 ℃, and bagasse lignin removing rate is 85.7%, and the hemicellulose clearance is 29.4%.
Embodiment 5
With mass fraction 1.0% CaO and 0.8%H
2O
2Be pretreatment fluid, 20～40 purpose bagasse are raw material, and liquid-solid ratio is 45: 1, handle 24 hours down for 40 ℃, and bagasse lignin removing rate is 84.7%, and the hemicellulose clearance is 24.4%.
Embodiment 6
With mass fraction 1.0% NaOH and 0.6%H
2O
2Be pretreatment fluid, 20～40 purpose straw slags are raw material, and liquid-solid ratio is 25: 1, handled 20 hours down for 30 ℃, and filtrate recycle 3 times, straw slag lignin removing rate is 79.5%, the hemicellulose clearance is 28.7%.
Embodiment 7
With mass fraction 1.0% NaOH and 0.6%H
2O
2Be pretreatment fluid, 20～40 purpose stalk slags are raw material, and liquid-solid ratio is 25: 1, handle 24 hours down for 35 ℃, and stalk slag lignin removing rate is 81.6%, and the hemicellulose clearance is 30.6%.
Embodiment 8
With mass fraction 1.0% NaOH and 0.6%H
2O
2Be pretreatment fluid, 20～40 purpose sorghum stalk slags are raw material, and liquid-solid ratio is 25: 1, handled 20 hours down for 30 ℃, and filtrate recycle 5 times, sorghum stalk slag lignin removing rate is 76.6%, the hemicellulose clearance is 18.4%.
Claims (4)
1. a plant fiber raw material irenine/oxidation pre-treatment and pretreatment fluid is carried out utilization process, at first plant fiber material through cutting, be ground into 20～40 purpose slags, and dedusting: using the alkali concn that contains by mass fraction concentration is 0.1%～5%, H
2O
2Concentration be that the solution of 0.2%～3% mixed base oxidize water carries out preliminary treatment, it is characterized in that, be 20: 1～45: 1 times in the liquid-solid ratio of alkali oxidize water and plant fiber material, its pretreatment temperature is 30 ℃～40 ℃; Preliminary treatment 5～40 hours, and to the pretreatment fluid recycle, the cycle-index of alkali oxidize water is 2～10 times in certain cycle-index, only needs to replenish clear water and solute, and externally discharged waste water not.
2. the described plant fiber material irenine/oxidation pre-treatment of claim 1 reaches pretreatment fluid is carried out utilization process, it is characterized in that, and with mass fraction 1.0% NaOH and 0.6%H
2O
2The solution of mixed base oxidize water carries out preliminary treatment, is raw material with 20～40 purpose bagasse, and liquid-solid ratio is 20: 1, handles 16 hours down for 30 ℃, and bagasse lignin removing rate is 64.3%, and the hemicellulose clearance is 29.8%..
3. the described plant fiber material irenine/oxidation pre-treatment of claim 1 reaches pretreatment fluid is carried out utilization process, it is characterized in that, and with mass fraction 1.0% NaOH and 0.6%H
2O
2The solution of mixed base oxidize water carries out preliminary treatment, is raw material with 20～40 purpose bagasse, and liquid-solid ratio is 25: 1, handles 24 hours down for 35 ℃, and bagasse lignin removing rate is 81.6%, and the hemicellulose clearance is 30.6%.
4. the described plant fiber material irenine/oxidation pre-treatment of claim 1 reaches pretreatment fluid is carried out utilization process, it is characterized in that, and with mass fraction 1.0% CaO and 0.8%H
2O
2The solution of mixed base oxidize water carries out preliminary treatment, and 20～40 purpose bagasse are raw material, and liquid-solid ratio is 45: 1, handles 24 hours down for 40 ℃, and bagasse lignin removing rate is 84.7%, and the hemicellulose clearance is 24.4%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710062808A CN101003955B (en) | 2007-01-18 | 2007-01-18 | Technology for pretreating raw material of plant fiber by soft alkali / oxidation process, and solvent cyclic utilization |
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|---|---|---|---|
| CN200710062808A CN101003955B (en) | 2007-01-18 | 2007-01-18 | Technology for pretreating raw material of plant fiber by soft alkali / oxidation process, and solvent cyclic utilization |
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| CN101003955A CN101003955A (en) | 2007-07-25 |
| CN101003955B true CN101003955B (en) | 2012-10-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555667B (en) * | 2009-05-15 | 2011-03-30 | 清华大学 | Biorefinery method of wood fiber material |
| CN102180977A (en) * | 2011-03-29 | 2011-09-14 | 华南理工大学 | Method for preparing antibacterial fiber material by using bagasse |
| CN112169774A (en) * | 2020-10-29 | 2021-01-05 | 青岛理工大学 | Straw-based dye adsorbent and preparation method and application thereof |
| CN114231047B (en) * | 2021-12-29 | 2023-04-11 | 厦门糠宝瑞新材料科技有限公司 | Degradable material and preparation method and application thereof |
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2007
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Non-Patent Citations (7)
| Title |
|---|
| 张婷等.木质纤维原料各组分温和液化行为.清华大学学报（自然科学版）46 12.2006,46(12),2011-2014. |
| 张婷等.木质纤维原料各组分温和液化行为.清华大学学报(自然科学版)46 12.2006,46(12),2011-2014. * |
| 张建安等.碱－氧－蒽醌蒸煮麦草脱木素.化工学报52 10.2001,52(10),916-920. |
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