CN104594091A - Extraction method of wheat straw cellulose - Google Patents
Extraction method of wheat straw cellulose Download PDFInfo
- Publication number
- CN104594091A CN104594091A CN201510019893.9A CN201510019893A CN104594091A CN 104594091 A CN104594091 A CN 104594091A CN 201510019893 A CN201510019893 A CN 201510019893A CN 104594091 A CN104594091 A CN 104594091A
- Authority
- CN
- China
- Prior art keywords
- cellulose
- cellulosic
- temperature
- stalk
- wheat
- 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
- 229920002678 cellulose Polymers 0.000 title claims abstract description 34
- 239000001913 cellulose Substances 0.000 title claims abstract description 34
- 241000209140 Triticum Species 0.000 title claims abstract description 30
- 235000021307 Triticum Nutrition 0.000 title claims abstract description 30
- 239000010902 straw Substances 0.000 title abstract description 12
- 238000000605 extraction Methods 0.000 title abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 25
- 230000035613 defoliation Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract 2
- 238000000227 grinding Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention provides an extraction method of wheat straw cellulose. The extraction method comprises the following steps: removing leaves from wheat straws, cutting the wheat straws into sections, cleaning, drying, grinding, and sieving to obtain straw powder; taking straw powder, adding sodium hydroxide solution, and performing constant-temperature high-temperature treatment; washing and filtering, and drying to obtain straw cellulose, wherein the mass fraction of the sodium hydroxide solution is 12.8-13%; the pressure during the constant-temperature high-temperature treatment is at 0.8MPa-0.82MPa; the temperature during constant-temperature high-temperature treatment is at 82DEG C-83DEG C; the constant-temperature high-temperature treatment lasts for 40-45min; the ratio of solid to liquid in the step b is (1:14)-(1:14.5). The extraction method of the wheat straw cellulose is improved by adopting the technical scheme, and the problem about how to provide a high-quality and high-efficiency extraction method of the wheat straw cellulose can be solved.
Description
Technical field
The present invention relates to a kind of recycling technique of agricultural crop straw, specifically the cellulosic extracting method of a kind of wheat stalk.
Background technology
Agricultural crop straw output is large, distribution is wide, kind is many, is the precious resources of life of farmers and agricultural development always.Wheat stalk is as the important agricultural byproduct of northern China, containing abundant utilized chemical composition, but utilization rate is always very low, except fraction is done to burn except bavin and paper making raw material, major part is burnt as discarded object, this not only wastes resource, also creates serious environmental pollution and disaster hidden-trouble.Therefore, accelerate to advance the comprehensive utilization of stalk, for stable Agro-ecology balance, increase agricultural incomes, alleviate resource constraint, alleviate environmental pressure etc. all tool be of great significance.
Natural plant fibre rich reserves, is extensively present in occurring in nature, as wheat stalk, Wheat Straw, bagasse and wood chip etc.Current, fiber use amount increases, traditional fibrous material such as cotton, fiber crops, silk, hair etc. can not meet the demand of people, and natural plant fibre aboundresources, cheap and there is the advantage of biodegradability and recyclability, significant in the energy solving facing mankind and environmental problem.At present, wheat stalk cellulose is just used for research by as a kind of new type natural fiber, is widely used in the fields such as weaving, medicine, papermaking, building, oilfield chemistry, agricultural water conservation, food chemistry, daily-use chemical industry.But the immature property of stalk cellulose extraction process directly governs cellulosic application.Visible, how to provide a kind of high-quality and high-efficiency to extract the cellulosic method of wheat stalk, become the key improving wheat stalk utilization rate.
Summary of the invention
The present invention is that propose the extracting method of a kind of meter of stalk cellulose, the present invention is achieved through the following technical solutions in order to solve the problem how providing a kind of high-quality and high-efficiency to extract the cellulosic method of wheat stalk.
The invention provides the cellulosic extracting method of a kind of wheat stalk, comprise the following steps:
A, by wheat stalk defoliation, segment, cleaning, oven dry, pulverizes, sieves, obtain stalk powder;
B, gets stalk powder, adds sodium hydroxide solution, constant voltage high-temperature process;
C, washing and filtering, dries, obtains stalk cellulose.
The present invention can also improve by the following technical programs further:
The mass fraction of described sodium hydroxide solution is 12.8% ~ 13%.The mass fraction of sodium hydroxide solution has a certain impact to cellulosic recovery rate.When NaOH mass fraction lower than 12.8% time, the content of cellulose extracted with NaOH mass fraction increase and improve; When hydroxide quality divides sodium number more than 13%, content of cellulose reduces relatively.When mass fraction is 12.9%, content of cellulose is the highest, reaches 86.74.Concentration of lye is lower, reacts insufficient, the fiber of extraction
Cellulose content is low; Concentration of lye is higher, can cause cellulosic a small amount of dissolving, cause content of cellulose to reduce, and consider that concentration of lye is too high simultaneously and make the problem such as cost increase and sewage disposal difficulty, therefore concentration of lye controls at about 12.9% optimum.
The pressure of described constant voltage high-temperature process is 0.8MPa ~ 0.82MPa.Hypertonia or too lowly all to have an impact to the content of stalk cellulose.When pressure is lower than 0.8 MPa, content of cellulose raises with it and increases; During more than 0.8 MPa, content of cellulose reduces gradually.Because under low pressure stalk can not be decomposed into cellulose preferably, and high pressure can make cellulose dissolution, cause content of cellulose lower.Therefore by Stress control at about 0.81MPa optimum.
The temperature of described constant voltage high-temperature process is 82 DEG C ~ 83 DEG C.Too high or too low for temperaturely all to impact cellulosic recovery rate.When temperature is lower than 82 DEG C, stalk can not be decomposed into cellulose comparatively fully; And temperature higher than 83 DEG C time, the cellulosic dissolution rate extracted can raise again greatly.Therefore, optimum treatmenting temperature should be 82 DEG C ~ 83 DEG C.
The time of described constant voltage high-temperature process is 40 ~ 45min.Constant temperature time is when 40 ~ 45 min, and content of cellulose presents the trend first raising and reduce afterwards, and during 43 min, content of cellulose is the highest, is 89.47%.Constant temperature time is shorter, and not exclusively, the cellulose of extraction is impure in reaction; Time lengthening, when material and solution fully react, content of cellulose is the highest; Continue time expand, material viscosity increases, and content of cellulose reduces on the contrary.Therefore constant temperature time is controlled at about 43 min.
The solid-to-liquid ratio of described b step is 1:14 ~ 1:14.5.Solid-to-liquid ratio directly affects content of cellulose.Solid-to-liquid ratio is 1: 14 ~ 1: 14.5 time, and content of cellulose increases along with the increase of solid-to-liquid ratio, but solid-to-liquid ratio higher than 1: 14.5 time, content of cellulose is reduction trend.This is because when solid-to-liquid ratio is lower, the extent of reaction is little, and content of cellulose is low; When solid-to-liquid ratio is too high, can cellulose decomposition be caused again, content be reduced, considers factors such as reducing costs simultaneously, therefore select best solid-to-liquid ratio to be 1:14.2.
Compared with prior art, the present invention achieves following beneficial effect: by the improvement of technical solution of the present invention to wheat stalk cellulose extraction process, make the cellulosic extraction rate reached more than 89% of wheat stalk, there is huge economy and environmental benefit, thus solve the problem how providing a kind of high-quality and high-efficiency to extract the cellulosic method of wheat stalk.
Detailed description of the invention
Below in conjunction with detailed description of the invention, to the cellulosic extracting method of wheat stalk of the present invention
Be described in further detail.
The cellulosic extracting method of this routine wheat stalk comprises the following steps:
A, by wheat stalk defoliation, segment, cleaning, oven dry, pulverizes, sieves, obtain stalk powder;
B, gets stalk powder, adds the sodium hydroxide solution that mass fraction is 12.9%, and solid-to-liquid ratio is 1:14, at 0.81MPa, constant voltage high-temperature process 43min at 82.5 DEG C;
C, washing and filtering, dries, obtains stalk cellulose.
Claims (6)
1. the cellulosic extracting method of wheat stalk, is characterized in that comprising the following steps: a, by wheat stalk defoliation, segment, cleaning, oven dry, pulverizes, sieves, obtain stalk powder; B, gets stalk powder, adds sodium hydroxide solution, constant voltage high-temperature process; C, washing and filtering, dries, obtains stalk cellulose.
2. the cellulosic extracting method of wheat stalk as claimed in claim 1, is characterized in that: the mass fraction of described sodium hydroxide solution is 12.8% ~ 13%.
3. the cellulosic extracting method of wheat stalk as claimed in claim 1, is characterized in that: the pressure of described constant voltage high-temperature process is 0.8MPa ~ 0.82MPa.
4. the cellulosic extracting method of wheat stalk as claimed in claim 1, is characterized in that: the temperature of described constant voltage high-temperature process is 82 DEG C ~ 83 DEG C.
5. the cellulosic extracting method of wheat stalk as claimed in claim 1, is characterized in that: the time of described constant voltage high-temperature process is 40 ~ 45min.
6. the cellulosic extracting method of the wheat stalk as described in any one of claim 1 ~ 5, is characterized in that: the solid-to-liquid ratio of described b step is 1:14 ~ 1:14.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019893.9A CN104594091A (en) | 2015-01-15 | 2015-01-15 | Extraction method of wheat straw cellulose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019893.9A CN104594091A (en) | 2015-01-15 | 2015-01-15 | Extraction method of wheat straw cellulose |
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| Publication Number | Publication Date |
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| CN104594091A true CN104594091A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510019893.9A Pending CN104594091A (en) | 2015-01-15 | 2015-01-15 | Extraction method of wheat straw cellulose |
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| Country | Link |
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| CN (1) | CN104594091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104886606A (en) * | 2015-06-18 | 2015-09-09 | 成都衔石科技有限公司 | Acid hydrolysis production technology for preparing cellulose food materials from straw |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735396A (en) * | 2009-12-31 | 2010-06-16 | 陕西科技大学 | Method for preparing super absorbent resin by using wheat straw |
| CN101985479A (en) * | 2010-12-10 | 2011-03-16 | 西北师范大学 | Preparation and application of carboxymethyl cellulose of wheat straw |
| CN102085680A (en) * | 2010-11-26 | 2011-06-08 | 江南大学 | Preparation method of crop straw fiber ecological composite material |
| WO2011073284A1 (en) * | 2009-12-18 | 2011-06-23 | Shell Internationale Research Maatschappij B.V. | A process for the extraction of sugars and lignin from lignocellulose-comprising solid biomass |
| CN103333723A (en) * | 2013-07-19 | 2013-10-02 | 中国农业科学院棉花研究所 | High pressure cotton straw alkali treatment method |
-
2015
- 2015-01-15 CN CN201510019893.9A patent/CN104594091A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011073284A1 (en) * | 2009-12-18 | 2011-06-23 | Shell Internationale Research Maatschappij B.V. | A process for the extraction of sugars and lignin from lignocellulose-comprising solid biomass |
| CN101735396A (en) * | 2009-12-31 | 2010-06-16 | 陕西科技大学 | Method for preparing super absorbent resin by using wheat straw |
| CN102085680A (en) * | 2010-11-26 | 2011-06-08 | 江南大学 | Preparation method of crop straw fiber ecological composite material |
| CN101985479A (en) * | 2010-12-10 | 2011-03-16 | 西北师范大学 | Preparation and application of carboxymethyl cellulose of wheat straw |
| CN103333723A (en) * | 2013-07-19 | 2013-10-02 | 中国农业科学院棉花研究所 | High pressure cotton straw alkali treatment method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104886606A (en) * | 2015-06-18 | 2015-09-09 | 成都衔石科技有限公司 | Acid hydrolysis production technology for preparing cellulose food materials from straw |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |
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