CN103071465A - Preparation method of spherical polymerized micron-size flyash particles - Google Patents
Preparation method of spherical polymerized micron-size flyash particles Download PDFInfo
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- CN103071465A CN103071465A CN2013100124300A CN201310012430A CN103071465A CN 103071465 A CN103071465 A CN 103071465A CN 2013100124300 A CN2013100124300 A CN 2013100124300A CN 201310012430 A CN201310012430 A CN 201310012430A CN 103071465 A CN103071465 A CN 103071465A
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- 239000010881 fly ash Substances 0.000 title claims abstract description 90
- 239000002245 particle Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims abstract description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 33
- 239000010883 coal ash Substances 0.000 claims description 10
- 239000000376 reactant Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 229910021645 metal ion Inorganic materials 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 239000012295 chemical reaction liquid Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 16
- 238000012360 testing method Methods 0.000 description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 5
- 229910000077 silane Inorganic materials 0.000 description 5
- 238000007334 copolymerization reaction Methods 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 238000010183 spectrum analysis Methods 0.000 description 4
- 239000007822 coupling agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- -1 siloxanes ethyl orthosilicate Chemical class 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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Abstract
The invention provides a preparation method of spherical polymerized micron-size flyash particles. The method is characterized by comprising the following steps: evenly grinding the flyash particles to prepare flyash powder; adding TEOS (tetraethoxysilane) and (gamma-aminopropyl) triethoxysilane respectively into the flyash powder, and stirring evenly; and adding absolute ethyl alcohol, redistilled water and concentrated sulfuric acid into the prepared solution, stirring evenly, then maintaining at a certain temperature and heating continuously; and then adding NaOH powder, holding the temperature unchanged, pouring out a reaction liquid after the reaction is finished, and washing the precipitate with acetone and the redistilled water alternately. The method takes the flyash as the main raw material, has the advantages of low cost, facilitation of operation, mild reaction conditions, capability of regulating particle sizes effectively, and the like, and has more excellent adsorbability for metal ions. Additionally, the spherical polymerized micron-size flyash particles prepared with the method can be recycled after alkali treatment, and has a potential application prospect in absorption and catalytic fields.
Description
Technical field
The invention belongs to the material technology field, be specifically related to carry out the method that copolymerization prepares micron-size spherical flyash polymer particles by flyash particle and little molecule silicone T EOS and silane coupler (γ-aminopropyl) triethoxysilane.
Background technology
The solid waste that flyash is discharged as Hazards in Power Plant, main component is SiO
2, Al
2O
3, CaO, Fe
2O
3Deng.Along with the development of power industry, the flyash discharge capacity of coal-burning power plant increases year by year.A large amount of flyash has not only polluted environment, and has caused the wasting of resources.In order to solve this difficult problem, countries in the world have been carried out the research that fly ash is utilized the aspect one after another.At present, flyash is mainly used in construction material, agricultural fertilizer, soil conditioner and sorbing material etc.Wherein, have loose structure and than bigger serface, have stronger adsorption capacity based on the flyash particulate, preparing the Cheap highly effective adsorbent take flyash as raw material is one of the most feasible approach of flyash high added value recycling.But because the difference of ature of coal and the difference of burning condition, flyash is by the ultrafine particles composition with different structure and form, and the particle diameter of single powder coal ash particle is less, and about tens microns of average grain diameter is unfavorable for filling the post operation and separates, and often causes secondary pollution.Therefore, flyash is carried out the key point that forming processes is the fly ash absorbent industrialized utilization.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of easy and simple to handle, the reaction time short, reaction is carried out at normal temperatures micron-size spherical flyash polymer particles.
Solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of preparation method of micron-size spherical flyash polymer particles is characterized in that comprising the steps:
(1) fly ash grain is ground evenly, it is for subsequent use to get flyash powder;
(2) in the flyash powder of step 1 preparation, add respectively ethyl orthosilicate and (γ-aminopropyl) triethoxysilane, stir;
(3) add absolute ethyl alcohol in the solution that in step 2, disposes, stir, then add respectively redistilled water and the concentrated sulfuric acid, continue to stir, then kept the uniform temperature continuous heating 1.5 ~ 2.5 hours;
(4) add the NaOH powder in the solution for preparing in the step 3, keep temperature-resistant in the step 3, continue reaction 3.5 ~ 4.5 hours, reaction is finished hypsokinesis and is gone out reactant liquor, and sediment obtains micron-size spherical flyash polymer particles after alternately washing 3 ~ 4 times with acetone and redistilled water.
The mass ratio of flyash powder, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane is 5:1:1 ~ 5:3:1 in the described step 2.
The mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:1 ~ 20:1:3 in the described step 3.
The mass ratio of NaOH powder is 1:0.2 ~ 1:0.4 in flyash powder in the described step 2 and the step 4.
Flyash powder in the described step 2 and the mass ratio of the absolute ethyl alcohol in the step 3 are 1:2.
It is 55 ℃ ~ 65 ℃ that heating in the described step 3 keeps temperature.
The preparation method of micron-size spherical flyash polymer particles of the present invention, have easy and simple to handle, reaction condition is gentle, can effectively regulate the advantages such as particle size.The present invention is take flyash as primary raw material, and is not only with low cost, and to economizing on resources, preserve the ecological environment, promote economic development, set up conservation-minded society and friendly environment society important theory and realistic meaning arranged.
In addition, the micron-size spherical flyash polymer particles of the present invention's preparation has spherical appearance, inside particles is by flyash particulate and siloxanes ethyl orthosilicate and the copolymerization of silane coupler (γ-aminopropyl) triethoxysilane, formation take silica as skeleton, the 3 D pore canal that mixes of flyash, because amino existence, it has more excellent adsorptivity for metal ion.In addition, with after the alkali treatment, reusable edible had potential application prospect in absorption and catalytic field after the micron-size spherical flyash polymer particles of the present invention's preparation used.
Description of drawings
Fig. 1 is the stereoscan photograph of the micron-size spherical flyash polymer particles of preparation.
Fig. 2 is the partial enlarged drawing of the micron-size spherical flyash polymer particles among Fig. 1.
Fig. 3 is the energy spectrum analysis spectrogram of the micron-size spherical flyash polymer particles of preparation.
Fig. 4 is the infrared spectrum of the micron-size spherical flyash polymer particles of preparation.
Fig. 5 is the thermogravimetric analysis spectrogram of the micron-size spherical flyash polymer particles of preparation.
The specific embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
Embodiment 1:
A kind of preparation method of micron-size spherical flyash polymer particles is characterized in that comprising the steps:
(1) fly ash grain is ground evenly, it is for subsequent use to get flyash powder;
(2) in the flyash powder of step 1 preparation, add respectively ethyl orthosilicate and (γ-aminopropyl) triethoxysilane, the mass ratio of flyash powder, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane is 5:2:1, stirs;
(3) add absolute ethyl alcohol in the solution that in step 2, disposes, stir, then add respectively redistilled water and the concentrated sulfuric acid, the mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:2, the mass ratio of the flyash powder that adds in absolute ethyl alcohol and the step 2 is 1:2, continue to stir, then maintain the temperature at 60 ℃ of lower continuous heatings 2 hours;
(4) add the NaOH powder in the solution for preparing in the step 3, the mass ratio that adds the flyash powder in NaOH powder and the step 2 is 1:0.3, keep temperature-resistant in the step 3, continue reaction 4 hours, reaction is finished hypsokinesis and is gone out reactant liquor, and sediment obtains micron-size spherical flyash polymer particles after alternately washing 3 ~ 4 times with acetone and redistilled water.
Embodiment 2:
In the processing step two of present embodiment, the mass ratio of flyash powder, ethyl orthosilicate, (γ-aminopropyl) triethoxysilane is 5:1:1, and other processing step is identical with embodiment 1.
Embodiment 3:
In the processing step two of present embodiment, the mass ratio of flyash powder, ethyl orthosilicate, (γ-aminopropyl) triethoxysilane is 5:3:1, and other processing step is identical with embodiment 1.
Embodiment 4:
In the processing step three of present embodiment, the mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:1, and other processing step is identical with embodiment 1.
Embodiment 5:
In the processing step three of present embodiment, the mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:3, and other processing step is identical with embodiment 1.
Embodiment 6:
In the processing step three of present embodiment, maintain the temperature at 55 ℃ of lower continuous heatings 2.5 hours, other processing step is identical with embodiment 1.
Embodiment 7:
In the processing step three of present embodiment, maintain the temperature at 65 ℃ of lower continuous heatings 1.5 hours, other processing step is identical with embodiment 1.
Embodiment 8:
In the processing step four of present embodiment, the mass ratio of the flyash powder in NaOH powder and the step 2 is 1:0.2, and other processing step is identical with embodiment 1.
Embodiment 9:
In the processing step four of present embodiment, the mass ratio of the flyash powder in NaOH powder and the step 2 is 1:0.4, and other processing step is identical with embodiment 1.
In order to determine optimised process step of the present invention, carried out a large amount of laboratory research tests, various test situation are as follows:
(1) selection of coupling agent
Use respectively KH550, KH560, KH570 makees coupling agent, and copolymerization in ethanolic solution generates spherical powder coal ash particle in the identical lower respectively reaction of other conditionally complete.Result of the test shows: make coupling agent with KH550, product flyash particle decentralization and spherical morphology are best.
(2) the raw material proportioning is on the impact of flyash polymer particles pattern
In step 2, selecting respectively flyash powder, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane mass ratio is 5:2:1,5:1:1,5:3:1, is prepared into micron-size spherical flyash particle.At last prepared micron-size spherical flyash particle is observed with SEM respectively, found micron-size spherical flyash particle spherical morphology the best that flyash powder, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane mass ratio prepare when being 5:2:1.
(3) concentrated sulfuric acid consumption is on the impact of flyash polymer particles pattern
In step 3, selecting respectively the mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:1,20:1:2,20:1:3, is prepared into micron-size spherical flyash particle.Prepared micron-size spherical flyash particle is observed with SEM, and the micron-size spherical flyash particle decentralization that the mass ratio of discovery absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid prepares when being 20:1:2 is best, and spherical morphology is best.As shown in Fig. 1 and Fig. 2, be that concentrated sulfuric acid consumption is the electron scanning micrograph of the micron-size spherical flyash particle that makes of 2mL and the electron scanning micrograph that corresponding surface local amplifies.
(4) the NaOH consumption is on the impact of flyash polymer particles pattern
In step 4, selecting respectively the mass ratio of the flyash powder in NaOH powder and the step 2 is 1:0.2,1:0.3,1:0.4, is prepared into micron-size spherical flyash particle.Prepared micron-size spherical flyash particle is observed with SEM, and the micron-size spherical flyash particle decentralization that the mass ratio of the flyash powder in discovery NaOH powder and the step 2 prepares when being 1:0.3 is best, and spherical morphology is best.
As shown in Fig. 1, Fig. 2, for flyash powder in the step 2, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane solution quality are the electron scanning micrograph of the micron-size spherical flyash particle that makes when being 1:0.3 of the mass ratio of the flyash powder in NaOH powder and the step 2 in 20:1:2 and the step 4 and the electron scanning micrograph of corresponding surface local amplification than the mass ratio for absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid in 5:2:1, the step 3.
In order to verify beneficial effect of the present invention, the inventor adopts the micron-size spherical coal ash polymer particles of the embodiment of the invention 1 preparation, use respectively SEM, Fourier transformation infrared spectrometer, thermogravimetric analyzer to carry out observation experiment, various test situation are as follows:
Observe article: micron-size spherical flyash polymer particles.
Laboratory apparatus: SEM, model are XL-20, are produced by Britain Philips company, and Electronic Speculum self is with energy spectrum analysis software can carry out energy spectrum analysis; Fourier transformation infrared spectrometer, model are that AVTAR360 is produced by Nicolet company; Thermogravimetric analyzer, model are PEVKIN-ELMER, are produced by U.S. TA company.
(1) observes
Method of testing by SEM is observed micron-size spherical coal ash polymer particles.
(2) test
Method of testing by power spectrum, Fourier transformation infrared spectrometer, thermogravimetric analyzer is tested micron-size spherical coal ash polymer particles.
(3) observed result
The energy spectrum analysis of micron-size spherical flyash polymer particles as shown in Figure 3, the FFIR curve as shown in Figure 4, the thermogravimetric analysis curve is as shown in Figure 5.
By Fig. 1, Fig. 2 as seen, micron-size spherical flyash polymer particles is spherical in shape, structural integrity, and monodispersity is good, and about diameter 200 μ m, the surface presents the graininess pattern.Fig. 3 is the energy spectrum analysis of flyash polymer particles, and wherein the Au element is from the front gold-plated film of Electronic Speculum test, and Fe, Mg, Al, S, Np and Ca element are from the flyash component, and the N element is from silane, and C and Si then may be from flyash or silane components.In Fig. 4,3360,3282 cm
– 1With 1577 cm
-1The characteristic infrared absworption peak that is absorbed as amino that occurs; 1123 and 1037cm
-1The peak that occurs should be attributed to Si-O-Si symmetric vibration absworption peak.By comparing, the infrared spectrum curve shows that copolymerization has occured for fly ash grain and ethyl orthosilicate and silane coupler (γ-aminopropyl) triethoxysilane, contains amido functional group, useful as catalysts or adsorbent about the strong coordination of metal ion.As seen from Figure 5, the flyash polymer particles has preferably heat endurance, and its residual solid is metal or nonmetal oxide, mainly is SiO
2, Al
2O
3, CaO, Fe
2O
3Deng, residual volume is 80.3%.
Claims (6)
1. the preparation method of a micron-size spherical flyash polymer particles is characterized in that comprising the steps:
(1) fly ash grain is ground evenly, it is for subsequent use to get flyash powder;
(2) in the flyash powder of step 1 preparation, add respectively ethyl orthosilicate and (γ-aminopropyl) triethoxysilane, stir;
(3) add absolute ethyl alcohol in the solution that in step 2, disposes, stir, then add respectively redistilled water and the concentrated sulfuric acid, continue to stir, then kept the uniform temperature continuous heating 1.5 ~ 2.5 hours;
(4) add the NaOH powder in the solution for preparing in the step 3, keep temperature-resistant in the step 3, continue reaction 3.5 ~ 4.5 hours, reaction is finished hypsokinesis and is gone out reactant liquor, and sediment obtains micron-size spherical flyash polymer particles after alternately washing 3 ~ 4 times with acetone and redistilled water.
2. according to the preparation method of micron-size spherical coal ash polymer particles claimed in claim 1, it is characterized in that: the mass ratio of flyash powder, ethyl orthosilicate and (γ-aminopropyl) triethoxysilane is 5:1:1 ~ 5:3:1 in the described step 2.
3. according to the preparation method of micron-size spherical coal ash polymer particles claimed in claim 1, it is characterized in that: the mass ratio of absolute ethyl alcohol, redistilled water and the concentrated sulfuric acid is 20:1:1 ~ 20:1:3 in the described step 3.
4. according to the preparation method of claim 1 or 2 described micron-size spherical coal ash polymer particles, it is characterized in that: the mass ratio of NaOH powder is 1:0.2 ~ 1:0.4 in the flyash powder in the described step 2 and the step 4.
5. according to the preparation method of claim 1 or 3 described micron-size spherical coal ash polymer particles, it is characterized in that: the flyash powder in the described step 2 and the mass ratio of the absolute ethyl alcohol in the step 3 are 1:2.
6. according to the preparation method of claim 1 or 3 described micron-size spherical coal ash polymer particles, it is characterized in that: it is 55 ℃ ~ 65 ℃ that the heating in the described step 3 keeps temperature.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688847A (en) * | 2016-03-11 | 2016-06-22 | 四川大学 | Gelatin/fly ash composite adsorbing material and preparation method thereof |
| CN106423109A (en) * | 2016-10-04 | 2017-02-22 | 青岛大学 | Cation-modified fly ash adsorbent and preparation method thereof |
| CN106540652A (en) * | 2016-10-04 | 2017-03-29 | 青岛大学 | Modified flying dust of a kind of quaternary ammonium salt cationic and preparation method thereof |
| CN106984278A (en) * | 2017-05-18 | 2017-07-28 | 付主枝 | A kind of processing method of low concentration weight hexavalent chromium waste water |
| CN108311124A (en) * | 2018-03-08 | 2018-07-24 | 东华理工大学 | A kind of preparation method and application of hyperbranched polyorganosiloxane modified coal ash |
| CN108927104A (en) * | 2018-08-02 | 2018-12-04 | 深圳市深港产学研环保工程技术股份有限公司 | A kind of preparation method protonating flyash |
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| CN101585954A (en) * | 2008-05-22 | 2009-11-25 | 中国科学院过程工程研究所 | Silicon dioxide hollow sphere/polymer composite heat insulating material and method for preparing same |
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2013
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Patent Citations (1)
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| CN101585954A (en) * | 2008-05-22 | 2009-11-25 | 中国科学院过程工程研究所 | Silicon dioxide hollow sphere/polymer composite heat insulating material and method for preparing same |
Non-Patent Citations (1)
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| DEEPTI JAIN ET AL.: "Synthesis and characterization of novel aminopropylated fly ash catalyst and its beneficial application in base catalyzed Knoevenagel condensation reaction", 《FUEL PROCESSING TECHNOLOGY》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688847A (en) * | 2016-03-11 | 2016-06-22 | 四川大学 | Gelatin/fly ash composite adsorbing material and preparation method thereof |
| CN106423109A (en) * | 2016-10-04 | 2017-02-22 | 青岛大学 | Cation-modified fly ash adsorbent and preparation method thereof |
| CN106540652A (en) * | 2016-10-04 | 2017-03-29 | 青岛大学 | Modified flying dust of a kind of quaternary ammonium salt cationic and preparation method thereof |
| CN106423109B (en) * | 2016-10-04 | 2018-10-26 | 青岛大学 | A kind of cation-modified flying dust adsorbent and preparation method thereof |
| CN106540652B (en) * | 2016-10-04 | 2018-10-26 | 青岛大学 | A kind of quaternary ammonium salt cationic is modified flying dust and preparation method thereof |
| CN106984278A (en) * | 2017-05-18 | 2017-07-28 | 付主枝 | A kind of processing method of low concentration weight hexavalent chromium waste water |
| CN108311124A (en) * | 2018-03-08 | 2018-07-24 | 东华理工大学 | A kind of preparation method and application of hyperbranched polyorganosiloxane modified coal ash |
| CN108311124B (en) * | 2018-03-08 | 2021-02-02 | 东华理工大学 | Preparation method and application of hyperbranched polysiloxane modified fly ash |
| CN108927104A (en) * | 2018-08-02 | 2018-12-04 | 深圳市深港产学研环保工程技术股份有限公司 | A kind of preparation method protonating flyash |
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| CN103071465B (en) | 2015-06-17 |
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