CN1587500A - Supersonic chemical pretreating method for bagasse for wood-plastic composite material - Google Patents
Supersonic chemical pretreating method for bagasse for wood-plastic composite material Download PDFInfo
- Publication number
- CN1587500A CN1587500A CN 200410051466 CN200410051466A CN1587500A CN 1587500 A CN1587500 A CN 1587500A CN 200410051466 CN200410051466 CN 200410051466 CN 200410051466 A CN200410051466 A CN 200410051466A CN 1587500 A CN1587500 A CN 1587500A
- Authority
- CN
- China
- Prior art keywords
- bagasse
- sonochemistry
- plastic composite
- treating method
- wood plastic
- 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.)
- Granted
Links
Abstract
The present invention relates to plant fiber technology, and especially the supersonic and chemical pre-treating method of bagasse as the wood-plastic material. Available physical and chemical treatment method of bagasse results in waste of resource and environmental pollution. The present invention provides the supersonic and chemical pre-treating method of bagasse. Under specific condition, bagasse is supersonically treated in the treating liquid comprising catalyst, oxidant, pH regulator and crystal-eliminating medium controlling agent to produce hydrolysis, cracking, oxidizing, physiochemical elimination of crystal, catalytic oxidation and decomposing reaction to bleach baggase and eliminate small molecular matter. The method of the present invention has the advantages of mild condition, low cost, saving in energy, protecting environment, etc. and is practical.
Description
Technical field:
The invention belongs to plant fiber technology, relate in particular to the sonochemistry pre-treating method of the bagasse that Wood-plastic material uses.
Technical background:
Sugarcane produces in tropical, subtropical zone, and China provides 100,000,000 tons of byproducts every year, mainly contains sucrose, sugarcane juice, sucrose molasses, bagasse etc.Yet along with the high-efficient development of sugar industry, the fibroid cane material behind the cane milling---bagasse has become solid-state bio-waste to be solved.China has tame large-scale sugar refinery more than 500 approximately, and its byproduct bagasse reaches more than 1,000 ten thousand tons every year.Bagasse is the potentiality understanding of sugarcane fiber not enough in industrial limited application main cause.Bagasse is produced the energy by sugar refinery burning more than 85%, and having only seldom, part is used for slurrying and paper, cardboard, furfural, animal foodstuff or other purposes.
The direction of utilizing of bagasse is to substitute timber, fuel and development chemical products.Utilize the papermaking of sugarcane fiber replacing wood, bionic composite material,, great strategic importance is arranged to save timber and to improve afforestation rate.It is exactly a kind of new developing direction that the method that employing melt extrudes compound enhancing is prepared wood plastic composite (WPC-Woodfiber Plastic Composite) with string and plastics.
This material composition relative complex of bagasse, its main component is as follows: content of cellulose 35～45%, hemicellulose 15～25%, lignin 15～25%, ash about 4%, other micromolecule 5～10% etc.Because remaining small molecular sugar etc. in the bagasse, the unstable material under heating condition in the bagasse decomposes or micromolecule oxidation charing variable color, makes variable color when other material blend, melt strength and mechanical properties decrease and processing rheological characteristic variation etc.So the pre-treatment to bagasse becomes crucial step.
Method to the bagasse pre-treatment is divided into chemical method and physics method, and chemical method comprises that the AS-AQ method is that alkaline sodium sulfite-anthraquinone pulping yield height, quality are shallow; The MSS-AQ method is that vulcanized sodium-sodium sulfite-NaOH-fear quinone method consumes that chemicals is few, yield is high, hardness is low, bleaching of light color, easy, intensity are good etc.; The Soda-AQ method is that NaOH-fear the quinone method has kept the paper pulping yield, has kept physical index preferably, can satisfy the quality requirement of general enterprise article of manufacture fully; Arbiso process is that neutral sodium sulfite, sodium carbonate are incubated certain hour in uniform temperature, and this method has yield height, bleaching of light color, easy, physical property advantages of higher.The physics method comprises pre-expanding treatment slurrying, and this method is that bagasse is incubated certain hour with the expanded recipient that arrives of bagasse at puffing apparatus under uniform temperature and certain pressure, bleaches processing.
Above method always produces a large amount of black liquor, and lignin, hemicellulose are degraded in a large number, and this is disadvantageous from utilization of resources angle, is the waste of resource on the one hand; On the other hand environment is also polluted.
Summary of the invention:
The purpose of this invention is to provide a kind of bagasse sonochemistry pre-treating method that is exclusively used in the Wood-plastic material preparation.Ultrasonics are ultrasonic generation, reception and the propagation laws in medium of research, ultrasonic various effects, and the acoustics important branch of ultrasonic contents such as application in basic research and national economy all departments.Sonochemistry is refered in particular in certain medium, is produced or induced the various chemical actions of generation under ultrasonication by void effect.Be characterized in: under the special ultrasonic condition, by ultrasonic broken wall, ultrasonic extracting, gradient falls in local superhigh temperature, super-pressure, ultra-high temperature and pressure that void effect (Cavitation) forms in microvesicle, cause or induce chemical reactions such as hydrolysis, cracking, oxidation reaction, strengthened diffusion, heat transfer and mass transport process; Cooperate physical chemistry disappear brilliant and chemical reactions such as catalytic oxidation, decomposition, hemicellulose and other volatile or decomposition, the small-molecule substance of carbonization and the degradation by-products in the lignin below 185 ℃ that carbohydrate, part have been degraded bleached, removed to bagasse, and cellulose degradation is less, and kept most of stable lignin and hemicellulose component, to be adapted to the usefulness of Wood-plastic material preparation.
Method of the present invention is under ultrasound condition sugar and the processing of other micromolecule are bleached, removed to bagasse, and it is less to handle the back cellulose degradation, and lignin and hemicellulose are partly degraded.Available like this processing bagasse solid yield will improve greatly, because unstable micromolecular removal will make that heat resistance raising and color and luster when carrying out blend with other material are better.Bagasse sonochemistry processing method has green, environmental protection, efficient, energy-conservation, advantage such as process is controlled, for further industrialization is laid a good foundation.。
The bagasse sonochemistry pre-treating method that is used for the Wood-plastic material preparation provided by the present invention is under the special ultrasonic condition, cause hydrolysis, cracking, oxidation chemistry reaction, cooperate physical chemistry disappear brilliant and catalytic oxidation, decomposition reaction, small-molecule substance is bleached and removed to bagasse.
Bagasse sonochemistry pre-treating method provided by the invention comprises the steps:
With bagasse with comprise catalyst, oxidant, reaction medium PH conditioning agent, the treatment fluid of crystalline medium controlling agent of disappearing carries out sonicated by 1: 8～1: 20 solid-to-liquid ratio condition, treatment conditions are for using the catalyst of 0.05～0.3% weight concentration, catalyst is for partly leading type, the strawberry type, the whisker attitude, four-needle-shape nano zinc oxide or nanometer anatase titanium dioxide, consumption is 0.05～0.1% of a bagasse weight, catalyst also can be heteropoly acid, polysulfide, fear quinone, consumption is 0.1～0.5% of a bagasse weight, the PH conditioning agent is a sodium carbonate, sodium bicarbonate, phosphoric acid, dibastic sodium phosphate, sodium phosphate, acetic acid, the regulation system pH value is between 2～5 or 9～12.Oxidant is hydrogen peroxide, ozone, peroxy acid, clorox, sodium chlorite etc., consumption is 1～10% of an above-mentioned treatment fluid gross weight, the crystalline medium controlling agent that disappears is NaOH, potassium hydroxide, liquefied ammonia, the crystalline medium controlling agent concentration that disappears is 0.1～6.0% weight concentration, consumption is 0.1～10% of an above-mentioned treatment fluid gross weight, the supersonic frequency that adopts is 10.0～50kHz, or adopt under certain two frequency and handled 15～150 minutes under the frequency mixing ultrasonic condition, the sonicated temperature is 20～80 ℃, and filtration drying obtains handling the bagasse sample after the sonicated.
The optimum condition of bagasse sonochemistry pre-treating method is: bagasse and treatment fluid carried out under the solid-to-liquid ratio condition by 1: 10～1: 15, catalyst is preferably the type of partly leading, strawberry type, whisker attitude, four-needle-shape nano zinc oxide or nanometer anatase titanium dioxide, consumption is 0.05～0.3% of a bagasse weight, and the PH conditioning agent is regulated between the pH value 3～4 or 10～11; The oxidant consumption is preferably 1.0～6.0% of treatment fluid gross weight, and the crystalline medium controlling agent consumption that disappears is preferably 0.1～6.0% of finishing agent gross weight; The supersonic frequency that adopts is preferably 28.5kHz, 32.5kHz or 28.5kHz and 32.5kHz mixing, and sonicated is preferably 20～45 minutes, and the sonicated temperature optimization is 35～70 ℃.
The sonochemistry pre-treating method of bagasse provided by the present invention has mild condition, cost is low, energy-conservation and advantage such as environmental protection, and very big practical value is arranged.
The specific embodiment:
Embodiment one
Adopt 0.08% nanometer anatase titanium dioxide, regulate PH to 10 with sodium carbonate, 2% clorox and 0.25% NaOH are formed; The solid-liquid of bagasse and treatment fluid is 1: 10, under 65 ℃, and the ultrasonic 20min of 28.5kHz, micromolecule rates such as the sugar that is removed are 22.0%.The bagasse color of handling bleaches.Handled the content of cellulose 40.29% of bagasse, hemicellulose level 18.88%, content of lignin 22.50%.Cane sugar content 0.41% in the filtrate, arabinose 0.36%.
Embodiment two
Adopt 0.3% polysulfide, regulate PH to 12, compositions such as 5.0% hydrogen peroxide and 2.0% potassium hydroxide with sodium bicarbonate; The solid-liquid of bagasse and treatment fluid be 1: 12 at 70 ℃ of ultrasonic 40min of following 32.5kHz, micromolecule rates such as the sugar that is removed are 16%.The bagasse color of handling is thin out.Handled the content of cellulose 43.58% of bagasse, hemicellulose level 21.42%, content of lignin 16.13%.Wood sugar content 1.02% in the filtrate, glucose 0.10%, galactolipin 0.04%, sucrose 0.03%.72.6 ℃ of bagasse 5% weightless temperatures, maximum weightless temperature are 291.26 ℃ and 350.78 ℃; 83.1 ℃ of 5% weightless temperatures of processing back bagasse, 345.84 ℃ of maximum weightless temperatures.Bagasse 5% weightless temperature of handling improves, and has only a maximum weightless temperature peak, illustrates that micromolecular removal has improved the heat resistance of bagasse.
Embodiment three
Adopt 0.1% the quinone of fearing, phosphoric acid is regulated PH to 11, compositions such as 1.5% ozone and 4.0% NaOH; The solid-liquid of bagasse and treatment fluid is 1: 14, at 53 ℃, and 32.5kHz sonicated 0.5 hour, micromolecule rates such as the sugar that is removed are 18.0%.The bagasse color of handling bleaches.Handled the content of cellulose 38.17% of bagasse, hemicellulose level 17.48%, content of lignin 17.06.Cane sugar content 1.17% in the filtrate, galactolipin 0.09%, arabinose 0.79%.
Embodiment four
Adopt 0.15% heteropoly acid, acetic acid is regulated PH to 4, compositions such as 3.0% sodium chlorite and 0.1% liquefied ammonia, the solid-liquid of bagasse and treatment fluid is 1: 16, under 35 ℃ of conditions, 28.5kHz and 32.5kHz frequency mixing ultrasonic were handled 45 minutes, and micromolecule rates such as the sugar that is removed are 20.7%.The bagasse color of handling bleaches.Handled the content of cellulose 52.63% of bagasse, hemicellulose level 19.00%, content of lignin 19.27%.Wood sugar content 2.07% in the filtrate, glucose 0.55%.
Claims (9)
1, a kind of wood plastic composite bagasse sonochemistry pre-treating method, it is characterized in that under the special ultrasonic condition, cause hydrolysis, cracking, oxidation chemistry reaction, cooperate physical chemistry disappear brilliant and catalytic oxidation, decomposition reaction, small-molecule substance is bleached and removed to bagasse, and concrete grammar comprises as follows:
With bagasse with comprise catalyst, oxidant, reaction medium PH conditioning agent, the treatment fluid of crystalline medium controlling agent of disappearing carries out sonicated by 1: 8～1: 20 solid-to-liquid ratio condition, treatment conditions are the catalyst with 0.05～0.3% weight concentration, catalyst is for partly leading type, the strawberry type, the whisker attitude, four-needle-shape nano zinc oxide or nanometer anatase titanium dioxide, consumption is 0.05～0.1% of a bagasse weight, catalyst also can be heteropoly acid, polysulfide, anthraquinone, consumption is 0.1～0.5% of a bagasse weight, the PH conditioning agent is a sodium carbonate, sodium bicarbonate, phosphoric acid, dibastic sodium phosphate, sodium phosphate, acetic acid, the regulation system pH value is between 2～5 or 9～12, oxidant is a hydrogen peroxide, ozone, peroxy acid, clorox, sodium chlorite, consumption is 1～10% of an above-mentioned treatment fluid gross weight, the crystalline medium controlling agent that disappears is a NaOH, potassium hydroxide, liquefied ammonia, the crystalline medium controlling agent concentration that disappears is 0.1～6.0% weight concentration, consumption is 0.1～10% of an above-mentioned treatment fluid gross weight, the supersonic frequency that adopts is 10.0～50kHz, or adopt under two frequency frequency mixing ultrasonic conditions and handled 15～150 minutes, the sonicated temperature is 20～80 ℃, and filtration drying obtains handling the bagasse sample after the sonicated.
2, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described bagasse and comprise that the treatment fluid of catalyst, oxidant, reaction medium PH conditioning agent, the crystalline medium controlling agent that disappears carries out sonicated by 1: 10～1: 15 solid-to-liquid ratio condition.
3, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that the described sonicated time is 20～45 minutes.
4, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described sonicated temperature is 35～70 ℃.
5, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described supersonic frequency is 28.5kHz, 32.5kHz, 28.5kHz or 32.5kHz.
6, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described catalyst for partly leading type, strawberry type, whisker attitude or four-needle-shape nano zinc oxide or nanometer anatase titanium dioxide, catalyst amount is 0.05～0.3% of a bagasse weight.
7, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described oxidant consumption is 1.0～6.0% of a treatment fluid gross weight.
8, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that described reaction medium PH conditioning agent, the regulation system pH value is between 3～4 or 10～11.
9, according to the bagasse sonochemistry pre-treating method of the wood plastic composite described in the claim 1, it is characterized in that the described crystalline medium controlling agent consumption that disappears is 0.1～6.0% of a finishing agent gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051466 CN1263923C (en) | 2004-09-15 | 2004-09-15 | Supersonic chemical pretreating method for bagasse for wood-plastic composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051466 CN1263923C (en) | 2004-09-15 | 2004-09-15 | Supersonic chemical pretreating method for bagasse for wood-plastic composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587500A true CN1587500A (en) | 2005-03-02 |
| CN1263923C CN1263923C (en) | 2006-07-12 |
Family
ID=34602453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051466 Expired - Fee Related CN1263923C (en) | 2004-09-15 | 2004-09-15 | Supersonic chemical pretreating method for bagasse for wood-plastic composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1263923C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389808B (en) * | 2006-12-28 | 2011-05-11 | 芬欧汇川集团公司 | A method for manufacturing mechanical pulp and paper products |
| CN102470544A (en) * | 2009-06-30 | 2012-05-23 | 新西兰森林研究所有限公司 | Method for producing wood fibre-plastics composite products |
| CN104213447A (en) * | 2014-03-25 | 2014-12-17 | 广州甘蔗糖业研究所 | Bagasse preprocessing method for activating surface groups |
-
2004
- 2004-09-15 CN CN 200410051466 patent/CN1263923C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389808B (en) * | 2006-12-28 | 2011-05-11 | 芬欧汇川集团公司 | A method for manufacturing mechanical pulp and paper products |
| CN102470544A (en) * | 2009-06-30 | 2012-05-23 | 新西兰森林研究所有限公司 | Method for producing wood fibre-plastics composite products |
| CN102470544B (en) * | 2009-06-30 | 2016-01-20 | 新西兰森林研究所有限公司 | For generation of the method for wood fibre-plastics composite products |
| CN104213447A (en) * | 2014-03-25 | 2014-12-17 | 广州甘蔗糖业研究所 | Bagasse preprocessing method for activating surface groups |
| CN104213447B (en) * | 2014-03-25 | 2016-08-17 | 广州甘蔗糖业研究所 | A kind of bagasse preprocess method of activating surface group |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1263923C (en) | 2006-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Aftab et al. | Different pretreatment methods of lignocellulosic biomass for use in biofuel production | |
| US5705369A (en) | Prehydrolysis of lignocellulose | |
| US5503996A (en) | Prehydrolysis of lignocellulose | |
| Yoon et al. | Comparison of ionic liquid, acid and alkali pretreatments for sugarcane bagasse enzymatic saccharification | |
| Lee et al. | Ionic liquid‐mediated selective extraction of lignin from wood leading to enhanced enzymatic cellulose hydrolysis | |
| BR112013004261B1 (en) | METHOD FOR THE TREATMENT OF ENZYMATIC SACARIFICATION OF A RAW MATERIAL BASED ON LIGNOCELLULOSIS | |
| BR122018008322B1 (en) | biomass processing method | |
| WO2011061400A1 (en) | Method of processing a carbohydrate raw-material | |
| Fatriasari et al. | The improvement of sugar and bioethanol production of oil palm empty fruit bunches (Elaeis guineensis Jacq) through microwave-assisted maleic acid pretreatment | |
| Li et al. | Lignocellulose pretreatment by deep eutectic solvents and related technologies: a review | |
| Sangian et al. | The effect of alkaline concentration on coconut husk crystallinity and the yield of sugars released | |
| Chamy et al. | Acid hydrolysis of sugar beet pulp as pretreatment for fermentation | |
| Stenberg et al. | Recycling of process streams in ethanol production from softwoods based on enzymatic hydrolysis | |
| Sangian et al. | Study of the preparation of sugar from high-lignin lignocellulose applying subcritical water and enzymatic hydrolysis: Synthesis and consumable cost evaluation | |
| Zhang et al. | Lignocellulose pretreatment using acid as catalyst | |
| CN1263923C (en) | Supersonic chemical pretreating method for bagasse for wood-plastic composite material | |
| Tran et al. | Reusing Alkaline Solution in Lignocellulose Pretreatment to Save Consumable Chemicals without Losing Efficiency. | |
| WO2015175308A1 (en) | Improved enzymatic hydrolysis of biomass | |
| Sohail Toor et al. | lignocellulosic biomass—thermal pre-treatment with steam | |
| CN104561130A (en) | Microwave-assisted pretreatment method for maize straws | |
| Haq et al. | Enzymatic hydrolysis of Saccharum officinarum lignocellulosic biomass by genetically modified hyperthermophilic cellulases | |
| CN101168748B (en) | Raw material microwave pre-treatment method for producing fuel alcohol | |
| Bahena-Molina et al. | Pretreatment Technologies for Second-Generation Bioethanol Production | |
| Silva Zanoni et al. | Review of ethanol production based on paper sludge: processes and prospects. | |
| Sato et al. | Influence of alkaline addition on the composition and yield on the hydrothermal treatment of rice straw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 Termination date: 20100915 |