CN106865524A - A kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres - Google Patents
A kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres Download PDFInfo
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- CN106865524A CN106865524A CN201710166349.6A CN201710166349A CN106865524A CN 106865524 A CN106865524 A CN 106865524A CN 201710166349 A CN201710166349 A CN 201710166349A CN 106865524 A CN106865524 A CN 106865524A
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- waste paper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres, by the wastepaper boiling timely deinking of size degradation disposed slurry, waste paper fibre is obtained；Paper pulp is made during waste paper fibre is added into deionized water, paper pulp is made using stirring after ultrasonic disperse；To stir to fall back and react in thermal response kettle during the concentrated sulfuric acid instills paper pulp, being subsequently cooled to room temperature carries out suction filtration, cleaned repeatedly with ethanol and deionized water, dry after carry out charing process and obtain.The present invention prepares the sulfur-bearing carbon microspheres of uniform particle sizes using the wastepaper for reclaiming using hydro-thermal charring, improves the utilization rate of recovery of wastepaper, its added value higher is assigned, for the treatment of wastepaper provides an effectively channel.
Description
Technical field
The invention belongs to technical field of material, and in particular to a kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres.
Background technology
The regeneration of waste paper, inherently one measure for being conducive to society, it can save the substantial amounts of forest reserves,
Avoid the harm abandoned and caused to environment of waste paper.At home, the utilization rate of wastepaper is relatively low, and main cause is tradition
Chemical Deinking technology excessively fall behind, larger not only is destroyed to paper pulp fiber, influence the quality of recycled writing paper, and cause environment
Secondary pollution.The history of waste paper utilization is very long, and China just recycles in Song dynasty's period to waste paper.US and European
Then begin to recycle waste paper at the beginning of mechanical paper occurs.But because Waste Paper Handling technology was also immature at that time, secondary stock
It is of poor quality, can only be used for copying the paper and cardboard of some low-qualitys, thus development speed is slow.
Since the nineties in 20th century, oneself turns into fastest-rising slurry kind to secondary stock, and this is primarily due to：1. primary fibre
Dimension raw material supply is nervous, forces more enterprises to use waste paper instead and makees raw material.2. low cost attracts more enterprises to make from waste paper
It is raw material.The cost of material of regenerated fiber papermaking is lower than wood pulp by 30%~50%, while vapour, electricity, water can be greatly decreased disappearing
Consumption, can also reduce the discharge of noxious material.3. the progress of Waste Paper Handling technology, is improved secondary stock quality, Ke Yiyong
More paper kinds are copied to match somebody with somebody and using bigger with dosage, for extensive utilization of waste paper provides reliable technical support.④
The ideas such as environmental protection, sustainable development, recycling economy are increasingly rooted in the hearts of the people, and supervise paper industry to carry out waste paper more efficiently
Utilize.5. the appearance of relevant policies regulation, is that the recycling of waste paper creates good condition.
In the treatment of waste paper, it is mostly used in for the treatment of wastepaper and manufactures paper pulp again, this processing method
High cost, and value-added content of product is not high, therefore, more rationally the effective wastepaper that recycles turns into what is required study
One big problem.
Carbon microspheres have preferably using preceding as a kind of novel charcoal material in fields such as magnetics, electricity, optics and medical science
Scape.At present, the preparation method of carbon microspheres mainly has charring, arc discharge method and chemical vapour deposition technique etc., but these sides
The charcoal source that method is used mostly benzene, toluene and the second nonrenewable resources extracted from colliery or oil such as fast, it is impossible to which realization can
Sustainable development, and difficult functionalization is all compared on the surface of carbon microspheres that these methods are obtained, the also need in concrete application
Learn modification or activation process.Reaction is carried out in enclosed system using the hydro-thermal carbonization process of glucide can prepare grain
Footpath is uniform, dispersiveness preferably carbon microspheres, but glucide is in itself a kind of industrial products, and feature carbon microspheres are prepared using it
Material production cost is of a relatively high, economic benefit is not notable, therefore finds a kind of charcoal source of wide material sources as research at present
Emphasis.And substantial amounts of fiber can be as the charcoal source for preparing sulfur-bearing carbon microspheres in waste paper, its main component is hemicellulose, fiber
Element and lignin, and waste paper source widely.Therefore, preparing sulfur-bearing carbon microspheres as charcoal source by the use of waste paper has extensively
Application prospect.
The content of the invention
It is an object of the invention to provide a kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres, solve and enjoy wastepaper
Using the low problem of the rate of recovery.
The technical solution adopted in the present invention is, a kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres, specifically according to
Lower step is implemented：
Step 1, weighs respectively by mass percentage：Wastepaper 0.4%~0.9%, the concentrated sulfuric acid 5.7%~6.2%, go
Ionized water 92.9%~93.9%, said components mass percent sum is 100%；
Step 2, by the wastepaper boiling timely deinking of size degradation disposed slurry, obtains waste paper fibre；
Step 3, the waste paper fibre that step 2 is obtained is made paper pulp in adding deionized water, is stirred using after ultrasonic disperse,
It is made dispersed paper pulp；
Step 4, in the concentrated sulfuric acid instillation paper pulp that obtains of step 3, will stir to fall back and react in thermal response kettle, so
After be cooled to room temperature and carry out suction filtration, cleaned repeatedly with ethanol and deionized water, dry after carry out charing process, obtain sulfur-bearing charcoal micro-
Ball.
The features of the present invention is also resided in,
Deinking is by the first ultrasound 50~70min of deinking of wastepaper slurry, then using floatation deinking in step 2.
The ultrasonic disperse time is 45~60min in step 3；It is magnetic agitation to stir, and mixing time is 10~20min.
Mixing time is 5~10min in step 4.
Temperature is 210 DEG C~260 DEG C, 18~24h of reaction time when being reacted in hydrothermal reaction kettle in step 4.
The design parameter of charing process is in step 4：Under nitrogen protection, 320~350 first are warming up to 3~5 DEG C/min
DEG C, 55~65min is incubated, then 750~900 DEG C are warming up to 8~10 DEG C/min, it is incubated 100~140min.
The beneficial effects of the invention are as follows it is equal that the present invention prepares particle diameter using the wastepaper for reclaiming using hydro-thermal charring
Even sulfur-bearing carbon microspheres, improve the utilization rate of recovery of wastepaper, assign its added value higher, are the treatment of wastepaper
There is provided an effectively channel.
Brief description of the drawings
Fig. 1 is sulfur-bearing carbon microspheres ESEM (SEM) figure prepared by the embodiment of the present invention 2；
Fig. 2 is single sulfur-bearing carbon microspheres scanning electron microscope image prepared by the embodiment of the present invention 2.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
The method that waste paper fibre of the present invention prepares sulfur-bearing carbon microspheres, specifically implements according to following steps：
Step 1, weighs respectively by mass percentage：Wastepaper 0.4%~0.9%, the concentrated sulfuric acid 5.7%~6.2%, go
Ionized water 92.9%~93.9%, said components mass percent sum is 100%；
Step 2, by the first ultrasound 50~70min of deinking of wastepaper boiling size degradation disposed slurry, then using floatation deinking,
Obtain waste paper fibre；
Step 3, waste paper fibre that step 2 is obtained is made paper pulp in adding deionized water, using ultrasonic disperse 45~
10~20min of magnetic agitation after 60min, is made dispersed paper pulp；
Step 4, by the concentrated sulfuric acid instillation paper pulp that obtains of step 3,5~10min of stirring uniformly falls back thermal response kettle
In temperature be 210 DEG C~260 DEG C at react 18~24h, being subsequently cooled to room temperature carries out suction filtration, anti-with ethanol and deionized water
Charing process is carried out after multiple cleaning, drying, the design parameter of charing process is：Under nitrogen protection, first with 3~5 DEG C/min liters
Temperature is incubated 55~65min to 320~350 DEG C, then is warming up to 750~900 DEG C with 8~10 DEG C/min, is incubated 100~140min,
Obtain sulfur-bearing carbon microspheres.
What is chosen in this experiment is normal office print paper, and paper breadth opens specification for A4 or 16, for preparing sulfur-bearing
The concentrated sulfuric acid concentration of carbon microspheres is 98%, is deionized water for make paper pulp, and its quality should meet the technical requirements of regulation.
Each component and processing mode are acted on：
As charcoal source after deinking office waste paper, the waste paper fibre and deionized water of different proportion form the paper of various concentrations
Slurry.The concentrated sulfuric acid is used as oxidant and catalyst, while also serving as sulphur source, hydrolyzes waste paper fibre half in water-heat process, obtains
The presoma of sulfur-bearing carbon microspheres, the addition of the different concentrated sulfuric acids, hydrolysis effect is different with sulfur content.Carbon microspheres presoma is through charing
Process removes small molecule, just obtains sulfur-bearing carbon microspheres, can be as the high-quality electrode material of battery.
Embodiment 1
After 0.4% deinking office waste paper, drying adds 93.9% deionized water to be made paper pulp with beater, using super
Sound wave cleaning machine disperses 45min, reuses magnetic stirrer stirring 10min, is made dispersed paper pulp；By 5.7% dense sulphur
Acid instills artificial stirring 10min in 100ml paper pulp, stirs and falls back in thermal response kettle, reactor is placed in into air blast and is done
It is heated to being cooled to room temperature taking-up with drying box after 210 DEG C of constant temperature keep 18h in dry case；Carried out after upper step product is taken out
Suction filtration, and cleaned repeatedly to neutrality using ethanol and deionized water, then product is placed in air dry oven after 8h drying,
In tube furnace, under nitrogen protection, be first warming up to 320 DEG C with 3 DEG C/min, be incubated 55min, then 750 are warming up to 8 DEG C/min
DEG C, 100min is incubated, obtain sulfur-bearing carbon microspheres.
Embodiment 2
After 0.5% deinking office waste paper, drying adds 93.8% deionized water to be made paper pulp with beater, using super
Sound wave cleaning machine disperses 1h, reuses magnetic stirrer stirring 12min, is made dispersed paper pulp and drips 5.7% concentrated sulfuric acid
Enter artificial stirring 8min in the above-mentioned paper pulp of 100ml, stir and fall back in thermal response kettle, reactor is placed in forced air drying
It is heated to being cooled to room temperature taking-up with drying box after 240 DEG C of constant temperature keep 24h in case；Taken out after upper step product is taken out
Filter, and cleaned repeatedly to neutrality using ethanol and deionized water, then product is placed in air dry oven after 8h drying,
In tube furnace, under nitrogen protection, be first warming up to 350 DEG C with 5 DEG C/min, be incubated 1h, then 800 DEG C are warming up to 10 DEG C/min,
Insulation 2h, obtains sulfur-bearing carbon microspheres.
Fig. 1 be use in embodiment 2 0.5% office printing waste paper, 5.7% concentration for 98% concentrated sulfuric acid and 93.8% go from
Sub- water and the sulfur-bearing carbon microspheres scanning electron microscope image made using technical solution of the present invention.Fig. 2 is using this hair in embodiment 2
The single sulfur-bearing carbon microspheres scanning electron microscope image of bright preparation.Fig. 1 shows using wastepaper using the grain prepared by inventive technique
Footpath is more uniform to connect scattered sulfur-bearing carbon microspheres, Fig. 2 it can be seen that sulfur-bearing carbon microspheres bulb diameter≤1 μm.
Embodiment 3
After 0.9% deinking office waste paper, drying adds 92.9% ionized water to be made paper pulp with beater, uses ultrasound
Ripple cleaning machine disperses 50min, reuses magnetic stirrer stirring 20min, is made dispersed paper pulp and drips 6.2% concentrated sulfuric acid
Enter artificial stirring 5min in the above-mentioned paper pulp of 100ml, stir and fall back in thermal response kettle, reactor is placed in forced air drying
It is heated to being cooled to room temperature taking-up with drying box after 260 DEG C of constant temperature keep 20h in case；Taken out after upper step product is taken out
Filter, and cleaned repeatedly to neutrality using ethanol and deionized water, then product is placed in air dry oven after 8h drying,
In tube furnace, under nitrogen protection, be first warming up to 330 DEG C with 4 DEG C/min, be incubated 65min, then 900 are warming up to 9 DEG C/min
DEG C, 140min is incubated, obtain sulfur-bearing carbon microspheres.
Sulfur-bearing carbon microspheres are prepared using the technology of the present invention, is charcoal forerunner with most common wastepaper, the concentrated sulfuric acid is used as urging
Agent, the technical method carbonized using hydro-thermal, can prepare that particle diameter is relatively more uniform to connect scattered sulfur-bearing carbon microspheres, improve
The utilization rate of wastepaper, assigns its added value higher, for the treatment of wastepaper provides an effectively channel.
Claims (6)
1. a kind of method that waste paper fibre prepares sulfur-bearing carbon microspheres, it is characterised in that specifically implement according to following steps：
Step 1, weighs respectively by mass percentage：Wastepaper 0.4%~0.9%, the concentrated sulfuric acid 5.7%~6.2%, deionization
Water 92.9%~93.9%, said components mass percent sum is 100%；
Step 2, by the wastepaper boiling timely deinking of size degradation disposed slurry, obtains waste paper fibre；
Step 3, the waste paper fibre that step 2 is obtained is made paper pulp in adding deionized water, is stirred using after ultrasonic disperse, is made
Dispersed paper pulp；
Step 4, in the concentrated sulfuric acid instillation paper pulp that obtains of step 3, will stir to fall back and react in thermal response kettle, Ran Houleng
But carry out suction filtration to room temperature, cleaned repeatedly with ethanol and deionized water, dry after carry out charing process, obtain sulfur-bearing carbon microspheres.
2. the method that waste paper fibre according to claim 1 prepares sulfur-bearing carbon microspheres, it is characterised in that deinking in step 2
It is by the first ultrasound 50~70min of deinking of wastepaper slurry, then using floatation deinking.
3. the method that waste paper fibre according to claim 1 prepares sulfur-bearing carbon microspheres, it is characterised in that ultrasound in step 3
Jitter time is 45~60min, and it is magnetic agitation to stir, and mixing time is 10~20min.
4. the method that waste paper fibre according to claim 1 prepares sulfur-bearing carbon microspheres, it is characterised in that stirred in step 4
Time is 5~10min.
5. the method that waste paper fibre according to claim 1 prepares sulfur-bearing carbon microspheres, it is characterised in that in water in step 4
Temperature is 210 DEG C~260 DEG C, 18~24h of reaction time when being reacted in thermal response kettle.
6. the method that the waste paper fibre according to claim 1,4 or 5 prepares sulfur-bearing carbon microspheres, it is characterised in that in step 4
The design parameter of charing process is：Under nitrogen protection, 320~350 DEG C first are warming up to 3~5 DEG C/min, insulation 55~
65min, then 750~900 DEG C are warming up to 8~10 DEG C/min, it is incubated 100~140min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474214A (en) * | 2017-07-05 | 2017-12-15 | 西安理工大学 | A kind of waste paper fibre/polyurethane elastic composite and preparation method thereof |
| CN109850894A (en) * | 2019-03-20 | 2019-06-07 | 西安理工大学 | A kind of method and application preparing porous carbon materials using useless corrugation paper fiber as raw material |
| CN111232950A (en) * | 2020-03-13 | 2020-06-05 | 陕西科技大学 | Method for preparing multifunctional elastic carbon material by carbonizing household paper |
| CN111410185A (en) * | 2020-04-30 | 2020-07-14 | 厦门大学 | Method for preparing carbon microspheres by hydrothermal carbonization in high-concentration salt solution |
| CN114496592A (en) * | 2021-12-20 | 2022-05-13 | 西安理工大学 | Preparation method of supercapacitor electrode material taking kitchen paper as raw material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167854A (en) * | 1997-03-28 | 1997-12-17 | 贵州省三穗县伟力造纸厂 | Method for producing regenerated newsprint using waste paper |
| CN1268600A (en) * | 2000-01-31 | 2000-10-04 | 四川宏达(集团)有限公司 | High-whiteness low-weight newsprinting paper and its production method |
| CN102888774A (en) * | 2011-07-21 | 2013-01-23 | 深圳市裕同印刷股份有限公司 | Technology for preparing paper packaging material from recycled waste paper |
-
2017
- 2017-03-20 CN CN201710166349.6A patent/CN106865524B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167854A (en) * | 1997-03-28 | 1997-12-17 | 贵州省三穗县伟力造纸厂 | Method for producing regenerated newsprint using waste paper |
| CN1268600A (en) * | 2000-01-31 | 2000-10-04 | 四川宏达(集团)有限公司 | High-whiteness low-weight newsprinting paper and its production method |
| CN102888774A (en) * | 2011-07-21 | 2013-01-23 | 深圳市裕同印刷股份有限公司 | Technology for preparing paper packaging material from recycled waste paper |
Non-Patent Citations (2)
| Title |
|---|
| 商品学教材编写组: "《商品学》", 28 February 1981 * |
| 赵莹: "微米尺寸球形炭的纤维素催化水热炭化制备及结构调控", 《万方数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474214A (en) * | 2017-07-05 | 2017-12-15 | 西安理工大学 | A kind of waste paper fibre/polyurethane elastic composite and preparation method thereof |
| CN109850894A (en) * | 2019-03-20 | 2019-06-07 | 西安理工大学 | A kind of method and application preparing porous carbon materials using useless corrugation paper fiber as raw material |
| CN111232950A (en) * | 2020-03-13 | 2020-06-05 | 陕西科技大学 | Method for preparing multifunctional elastic carbon material by carbonizing household paper |
| CN111410185A (en) * | 2020-04-30 | 2020-07-14 | 厦门大学 | Method for preparing carbon microspheres by hydrothermal carbonization in high-concentration salt solution |
| CN111410185B (en) * | 2020-04-30 | 2021-11-16 | 厦门大学 | Method for preparing carbon microspheres by hydrothermal carbonization in high-concentration salt solution |
| CN114496592A (en) * | 2021-12-20 | 2022-05-13 | 西安理工大学 | Preparation method of supercapacitor electrode material taking kitchen paper as raw material |
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Inventor after: Cheng Youliang Inventor after: Yang Mannan Inventor after: Fang Changqing Inventor after: Bai Mengsha Inventor after: Wang Kaiye Inventor after: Zhang Qingling Inventor after: Su Jian Inventor before: Cheng Youliang Inventor before: Yang Mannan Inventor before: Fang Changqing Inventor before: Bai Mengsha Inventor before: Wang Kaiye Inventor before: Zhang Qingling Inventor before: Su Jian |
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