CN102107878A - Method for synthesizing fly ash zeolite by alkali fusion-microwave process - Google Patents
Method for synthesizing fly ash zeolite by alkali fusion-microwave process Download PDFInfo
- Publication number
- CN102107878A CN102107878A CN2010105375087A CN201010537508A CN102107878A CN 102107878 A CN102107878 A CN 102107878A CN 2010105375087 A CN2010105375087 A CN 2010105375087A CN 201010537508 A CN201010537508 A CN 201010537508A CN 102107878 A CN102107878 A CN 102107878A
- Authority
- CN
- China
- Prior art keywords
- zeolite
- fly ash
- flyash
- grog
- add
- 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
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to a method for synthesizing fly ash zeolite by an alkali fusion-microwave process, particularly a method for synthesizing zeolite by utilizing industrial solid waste fly ash. In the invention, fly ash is used as a main raw material, NaOH is used as an activating agent, and an alkali fusion-microwave process is used for preparing the zeolite product. In the method, an ultrasonic dispersion process enables the activating agent to sufficiently contact the fly ash, and calcination enables the fusion reaction of the fly ash and the activating agent at high temperature, thereby increasing the conversion rate of the zeolite; the introduction of the 4A zeolite can enhance the purity of the 4A fly ash zeolite and reduce the generation of impure crystals; and microwaves are used for heating in the crystallization process, thereby greatly shortening the crystallization time of the zeolite. The method is simple to operate, has the advantages of simple equipment, short reaction time and energy saving, is convenient, feasible and practical, is suitable for industrial production of synthetic zeolite from fly ash, and develops a new way for comprehensive and cyclic utilization of fly ash.
Description
Technical field:
The present invention relates to a kind of alkali melts-and microwave method is synthesized the method for coal ash zeolite, specifically, mainly is the method for utilizing industrial solid castoff flyash synthetic zeolite.
Background technology:
Flyash is a kind of particulate dispersed industrial solid castoff behind the pulverized coal friring, and its major ingredient is SiO
2And Al
2O
3, the total content of the two is more than 70%.At present, the quantity discharged of the annual flyash of China surpasses 1.6 hundred million tons, and is ascendant trend year by year.According to relevant, China's utilization of coal ash rate is mainly used in and builds the road, builds brickmaking and soil improvement etc. less than 40% at present.Flyash has the volcanic ash characteristic, is to make flyash turn waste into wealth, obtain the effective way of high value added product with the flyash synthetic zeolite.
The research of flyash synthetic zeolite begins the history in existing more than 20 year so far from Holler and Wrisching.At present, the technology of utilizing the flyash synthetic zeolite is comparative maturity, its main synthetic method has hydrothermal synthesis method, microwave-assisted synthesis method, alkali fusion method, the hot method of salt, mixes alkali gas phase synthesis method, trace water system solid-phase synthesis etc., but existing synthetic method shortcomings such as also the ubiquity reaction times is long, cost is too high, the zeolite transformation efficiency is low, product performance are not ideal enough.
Hydrothermal synthesis method is present widely used a kind of prior synthesizing method, but its exist aging take long, temperature of reaction is high, energy consumption is big, zeolite transformation efficiency low (a large amount of quartz and mullites can not dissolve in the flyash) and zeolite product be with shortcomings such as by product generations.Microwave assisting method is to be based upon on the basis of traditional water thermal synthesis method, though improved the speed of flyash crystallization process, shortened generated time greatly, reduced synthetic cost to a certain extent, but still can't break away from the problem of the intrinsic existence of traditional water thermal synthesis method, the transformation efficiency of zeolite product is low.The alkali fusion method can make the silane agent major part in the flyash be converted into zeolite, do not contain mullite and quartz in the product, improved the utilization of coal ash rate greatly, and can obtain the higher zeolite of purity by regulating silica alumina ratio and optimizing synthesis condition, but this method activates, the heated and stirred time is longer, when reacting in non-encloses container, the moisture in the reaction system is volatile to be fallen.Though the hot method of salt need not add water in the salt thermal process, contain a large amount of salt in its synthetics, its product needed is washed with a large amount of water, as handles and badly easily environment is polluted, and the performance of temperature of reaction height, zeolite product is also desirable not to the utmost.Mixing the alkali gas phase synthesis method and the most of silane agent in the flyash can be comprised that mullite is converted into cancrinite with quartz crystals material mutually, is a kind of comparatively easy synthetic method, but there are shortcomings such as length consuming time, efficient are low in it.Trace water system solid-phase synthesis since in the reaction system water yield few, mix inhomogeneously, so be difficult to react completely, flyash transformation efficiency and zeolite product performance are all undesirable.
Summary of the invention
The object of the present invention is to provide a kind of zeolite transformation efficiency height, crystallization time is short, and the alkali that cost is low melts-method of the synthetic coal ash zeolite of microwave method.
Technical solution: the inventive method step is as follows:
1) flyash is carried out ball milling, and cross 200 order molecular sieves;
2) flyash after ball milling sieves in sodium hydroxide powder and the step 1) is by 1～1.4: 1 mass ratio mixes;
3) to step 2) mixture in add entry, solid-to-liquid ratio is 1: 1～5, ultra-sonic dispersion 5～20 minutes, then with resultant solid water mixture 100 ℃ dry 1～2 hour down;
4) resulting mixture in the step 3) is packed into plumbago crucible in atmosphere furnace, feeds nitrogen with the speed of 0.05～1L/min, 600～700 ℃ of roasting temperatures 45～75 minutes, cools to room temperature with the furnace and obtains alkali fusion flyash grog;
5) with after obtaining grog in the step 4) and being ground to powder, be that 1: 5～15 ratio adds entry in solid-to-liquid ratio, add sodium aluminate and adjust silica alumina ratio extremely: n (SiO
2)/n (Al
2O
3)=1.44～2.16 add particle diameter then: 0.4～0.6 purpose 4A zeolite seed crystal, add-on by quality than grog: 4A zeolite seed crystal=100: 1-10, and stir ageing 8～16 hours;
6) with the mixture that obtains in the step 5) in microwave oven under 90～100 ℃ of temperature crystallization after washing, drying, obtain the zeolite product after 5～30 minutes.
Flyash main component of the present invention includes: SiO
2, Al
2O
3, all the other are impurity, wherein: press mass percent, SiO
2And Al
2O
3Total content 〉=70%.
The present invention is a main raw material with flyash, is activator with NaOH, adopt alkali melt-microwave method prepared zeolite product.Ultrasonic dispersion makes activator fully contact with flyash in the method, and calcining makes flyash and activator that frit reaction at high temperature take place, and has improved the transformation efficiency of zeolite; The 4A zeolite seed crystal is introduced, and can improve the purity of 4A coal ash zeolite, reduces the generation of stray crystal; In crystallization process, use microwave heating, shortened the crystallization time of zeolite greatly.This method has been avoided the shortcoming of existing flyash synthetic zeolite method, coal ash zeolite product purity and transformation efficiency have been improved, have easy and simple to handle, equipment is simple, reaction times is short, advantage such as save energy and non-secondary pollution is a kind of simple and feasible practical approach, is applicable to the suitability for industrialized production of fly-ash Preparation synthetic zeolite.
The present invention is the comprehensive utilization of resources to industrial solid castoff, has not only reduced the production cost of zeolite, has reduced environmental pollution, and disposes for flyash and to have opened up a new way.Utilize industrial residue to belong to environmental protection project, can also enjoy the treatment of reduction or remission of taxes, reduce the production cost of zeolite.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is the coal ash zeolite XRD diffractogram of the embodiment of the invention 1;
Fig. 3 is the coal ash zeolite XRD diffractogram of the embodiment of the invention 2;
Fig. 4 is the coal ash zeolite XRD diffractogram of the embodiment of the invention 3.
Embodiment
Use XRD and xrf analysis method to analyze testing used flyash, main component includes in the flyash: SiO
2And Al
2O
3, wherein: SiO
2And Al
2O
3Total content 〉=70% (mass percent).
Utilize alkali fusion-microwave method to synthesize the method for coal ash zeolite according to the present invention, it specifically may further comprise the steps:
Embodiment 1:
Flyash is chosen from suburbs, packet header first heat power plant, and its chemical constitution is as shown in table 1.
(1) flyash is carried out ball milling, and cross 200 order molecular sieves;
(2) flyash after sieving with ball milling in plastic containers weighing sodium hydroxide powder and the step (1) mixes by 1.2: 1 mass ratio;
(3) add entry in the mixture of step (2), solid-to-liquid ratio is 1: 1, ultra-sonic dispersion 10 minutes, then with resultant solid water mixture 100 ℃ dry 1 hour down;
(4) resulting mixture in the step (3) is packed into plumbago crucible feeds nitrogen in 600 ℃ of following roastings 45 minutes in atmosphere furnace, cool to room temperature with the furnace and obtain alkali fusion flyash grog;
(5) with after obtaining grog in the step (4) and being ground to powder, taking by weighing the grog powder, is to add entry at 1: 8 by solid-to-liquid ratio, and adding sodium aluminate, to adjust silica alumina ratio be 1.6, add grog in mass ratio: the ratio of 4A zeolite seed crystal=100: 1 is mixed, and stirs ageing 8 hours;
(6) in 90～100 ℃ of following crystallization 5 minutes, being washed with water to pH value was 7～8 in microwave oven for mixture that ageing in the step (5) is good, 100 ℃ down dryings obtain the zeolite product after 6 hours.
The XRD figure spectrum of above-mentioned technology synthetic coal ash zeolite is seen accompanying drawing 2.Performance index are: CEC value: 396.5mmol/100g, specific surface area is at 468.28m
2/ g, mean pore size is at 4.114nm, and pore volume 0.3812cc/g, zeolite transformation efficiency are 70.6%.
Embodiment 2:
Flyash is chosen from Xi'an despot's bridge heat power plant, and its chemical constitution is as shown in table 2.
(1) flyash is carried out ball milling, and cross 200 order molecular sieves;
(2) flyash after sieving with ball milling in plastic containers weighing sodium hydroxide powder and the step (1) mixes by 1.3: 1 mass ratio;
(3) add entry in the mixture of step (2), solid-to-liquid ratio is 1: 3, and ultra-sonic dispersion 15 minutes is following dry 2 hours at 100 ℃ with resultant solid water mixture then;
(4) resulting mixture in the step (3) is packed into plumbago crucible feeds nitrogen in 650 ℃ of following roastings 60 minutes in atmosphere furnace, cool to room temperature with the furnace and obtain alkali fusion flyash grog;
(5) with after obtaining grog in the step (4) and being ground to powder, taking by weighing the grog powder, is to add entry at 1: 12 by solid-to-liquid ratio, and adding sodium aluminate, to adjust silica alumina ratio be 2, add grog in mass ratio: the ratio of 4A zeolite seed crystal=100: 5 is mixed, and stirs ageing 12 hours;
(6) mixture that ageing in the step (5) is good in 90～100 ℃ of following crystallization 15 minutes, is washed with water to pH most 7～8, obtain the zeolite product after dry 6 hours down at 100 ℃ in microwave oven.
The XRD figure spectrum of above-mentioned technology synthetic coal ash zeolite is seen accompanying drawing 3.Performance index are: CEC value: 423.8mmol/100g, specific surface area is at 476.4m
2/ g, mean pore size is at 4.126nm, and pore volume 3.952cc/g, zeolite transformation efficiency are 72.1%.
Embodiment 3:
Flyash is chosen from Luoyang, Henan power plant, and its chemical constitution is as shown in table 3.
(1) flyash is carried out ball milling, and cross 200 order molecular sieves;
(2) flyash after sieving with ball milling in plastic containers weighing sodium hydroxide powder and the step (1) mixes by 1.4: 1 mass ratio;
(3) add entry in the mixture of step (2), solid-to-liquid ratio is 1: 5, and ultra-sonic dispersion 20 minutes is following dry 1.5 hours at 100 ℃ with resultant solid water mixture then;
(4) resulting mixture in the step (3) is packed into plumbago crucible feeds nitrogen in 700 ℃ of following roastings 75 minutes in atmosphere furnace, cool to room temperature with the furnace and obtain alkali fusion flyash grog;
(5) with after obtaining grog in the step (4) and being ground to powder, taking by weighing the grog powder, is to add entry at 1: 14 by solid-to-liquid ratio, and adding sodium aluminate, to adjust silica alumina ratio be 2.1, add grog in mass ratio: the ratio of 4A zeolite seed crystal=100: 10 is mixed, and stirs ageing 14 hours;
(6) mixture that ageing in (5) is good in 90～100 ℃ of following crystallization 20 minutes, is washed with water to pH most 7～8, obtain the zeolite product after dry 6 hours down at 100 ℃ in microwave oven.
The XRD figure spectrum of above-mentioned technology synthetic coal ash zeolite is seen accompanying drawing 4.Performance index are: CEC value: 416.3mmol/100g,
Specific surface area is at 472m
2/ g, mean pore size is at 4.121nm, and pore volume 3.824cc/g, zeolite transformation efficiency are 71.2%.
Table 1 chemical composition of PCA/wt% (taking from suburbs, packet header first heat power plant)
Table 2 chemical composition of PCA/wt% (taking from Xi'an despot's bridge heat power plant)
Table 3 chemical composition of PCA/wt% (taking from Luoyang, Henan power plant)
Claims (2)
1. alkali melts-method of the synthetic coal ash zeolite of microwave method, and it is characterized in that: method steps is as follows:
1) flyash is carried out ball milling, and cross 200 order molecular sieves;
2) flyash after ball milling sieves in sodium hydroxide powder and the step 1) is by sodium hydroxide powder: flyash=1～1.4: 1 mass ratio mixes;
3) to step 2) mixture in add entry, solid-to-liquid ratio is 1: 1～5, ultra-sonic dispersion 5～20 minutes, then with resultant solid water mixture 100 ℃ dry 1～2 hour down;
4) resulting mixture in the step 3) is packed into plumbago crucible in atmosphere furnace, feeds nitrogen with the speed of 0.05～1L/min, 600～700 ℃ of roasting temperatures 45～75 minutes, cools to room temperature with the furnace and obtains alkali fusion flyash grog;
5) with after obtaining grog in the step 4) and being ground to powder, be that 1: 5～15 ratio adds entry in solid-to-liquid ratio, add sodium aluminate and adjust silica alumina ratio extremely: n (SiO
2)/n (Al
2O
3)=1.44～2.16 add particle diameter then: 0.4～0.6 purpose 4A zeolite seed crystal, add-on by quality than grog: 4A zeolite seed crystal=100: 1～10, and stir ageing 8～16 hours;
6) with the mixture that obtains in the step 5) in microwave oven under 90～100 ℃ of temperature crystallization after washing, drying, obtain the zeolite product after 5～30 minutes.
2. alkali according to claim 1 melts-method of the synthetic coal ash zeolite of microwave method, it is characterized in that the flyash main component includes: SiO
2, Al
2O
3, all the other are impurity, wherein: press mass percent, SiO
2And Al
2O
3Total content 〉=70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105375087A CN102107878B (en) | 2010-11-10 | 2010-11-10 | Method for synthesizing fly ash zeolite by alkali fusion-microwave process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105375087A CN102107878B (en) | 2010-11-10 | 2010-11-10 | Method for synthesizing fly ash zeolite by alkali fusion-microwave process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102107878A true CN102107878A (en) | 2011-06-29 |
| CN102107878B CN102107878B (en) | 2013-01-23 |
Family
ID=44172176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105375087A Expired - Fee Related CN102107878B (en) | 2010-11-10 | 2010-11-10 | Method for synthesizing fly ash zeolite by alkali fusion-microwave process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102107878B (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394367A (en) * | 2013-08-20 | 2013-11-20 | 东北石油大学 | Preparation method of ZSM-5 molecular sieve core shell double-layer catalyst by utilizing fly ash |
| CN103435064A (en) * | 2013-08-20 | 2013-12-11 | 东北石油大学 | Method for preparing nano-scale ZSM-5 molecular sieve by using coal ash |
| CN103936040A (en) * | 2013-01-18 | 2014-07-23 | 新疆大学 | Ultrasonic wave acid method for extracting aluminum oxide from fly ash |
| CN103958410A (en) * | 2011-08-10 | 2014-07-30 | 爱斯科姆控股Soc有限公司 | Ultrasonic synthesis of zeolites from fly ash |
| CN104302578A (en) * | 2012-03-27 | 2015-01-21 | 西开普大学 | Synthesis of zeolite X with hierarchical morphology from fly ash |
| CN106082267A (en) * | 2016-06-16 | 2016-11-09 | 中国华能集团公司 | A kind of use microwave hydrothermal coupling process by coal ash for manufacturing for the method for SAPO 34 molecular sieve |
| CN106276960A (en) * | 2016-08-15 | 2017-01-04 | 贵州大学 | A kind of method of flyash microwave alkali fusion Hydrothermal Synthesis faujasite |
| CN106698587A (en) * | 2016-11-25 | 2017-05-24 | 环境保护部华南环境科学研究所 | Phenanthrene and fluoranthene photocatalytic degradation method using fly-ash zeolite load |
| CN106745470A (en) * | 2016-11-25 | 2017-05-31 | 环境保护部华南环境科学研究所 | A kind of zeolite-loaded doped by rare-earths TiO of modified coal ash2The method that catalytic degradation removes anthracene |
| CN107445185A (en) * | 2017-09-29 | 2017-12-08 | 广州百兴网络科技有限公司 | A kind of coal ash for manufacturing for aluminium polychloride method |
| CN107628632A (en) * | 2017-09-29 | 2018-01-26 | 广州百兴网络科技有限公司 | A kind of method using coal ash for manufacturing for flocculant poly aluminium chloride |
| CN108383131A (en) * | 2018-02-10 | 2018-08-10 | 西安建筑科技大学 | A method of flyash being prepared into different zeolites using solid phase transformation method |
| WO2019068135A1 (en) * | 2017-10-04 | 2019-04-11 | Neomaterials Pty Ltd | Synthesis of zeolites |
| CN106607006B (en) * | 2016-11-25 | 2019-07-19 | 环境保护部华南环境科学研究所 | A kind of preparation method of the adsorbent of synchronous denitrification dephosphorizing |
| WO2020130259A1 (en) * | 2018-12-18 | 2020-06-25 | 주식회사 포스코 | Zeolite and preparation method therefor |
| US10882022B2 (en) | 2018-08-07 | 2021-01-05 | King Abdulaziz University | Method of removing organic pollutants from water using ball milled and sonicated oil fly ash powder |
| CN112195029A (en) * | 2020-10-28 | 2021-01-08 | 东北大学 | Method and device for preparing soil conditioner by using coal ash synthetic zeolite to treat wastewater |
| CN112194150A (en) * | 2020-11-11 | 2021-01-08 | 贵州理工学院 | Preparation method of fly ash-based microporous and hierarchical porous zeolite molecular sieve |
| CN112340750A (en) * | 2020-11-11 | 2021-02-09 | 贵州理工学院 | Green and efficient activation method for fly ash |
| CN113375507A (en) * | 2021-06-30 | 2021-09-10 | 东北大学 | Preparation method and application of fly ash-based aircraft tail flame infrared inhibition material |
| CN113428873A (en) * | 2021-06-15 | 2021-09-24 | 辽宁科技大学 | Method for preparing fly ash-based HS-type molecular sieve by microwave alkali fusion |
| CN113751053A (en) * | 2021-10-11 | 2021-12-07 | 中国环境科学研究院 | Catalyst suitable for low-concentration large-air-volume organic volatile matters and preparation method thereof |
| CN115432713A (en) * | 2022-10-08 | 2022-12-06 | 黑龙江省能源环境研究院 | Method for preparing fly ash-based molecular sieve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164884A (en) * | 2007-10-12 | 2008-04-23 | 山东轻工业学院 | Multistage synthesis method for coal ash zeolite |
| CN101172634A (en) * | 2007-10-11 | 2008-05-07 | 刘成长 | Technique for producing hydroted alumina and silicic acid with coal ash |
| CN101367529A (en) * | 2008-09-28 | 2009-02-18 | 西安建筑科技大学 | Method for synthesis of 4A molecular sieve with coal ash alkali melting method |
| US20090257948A1 (en) * | 2008-04-11 | 2009-10-15 | Consiglio Nazionale Delle Ricerche | Synthesis of Zeolites from Fly Ash |
-
2010
- 2010-11-10 CN CN2010105375087A patent/CN102107878B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172634A (en) * | 2007-10-11 | 2008-05-07 | 刘成长 | Technique for producing hydroted alumina and silicic acid with coal ash |
| CN101164884A (en) * | 2007-10-12 | 2008-04-23 | 山东轻工业学院 | Multistage synthesis method for coal ash zeolite |
| US20090257948A1 (en) * | 2008-04-11 | 2009-10-15 | Consiglio Nazionale Delle Ricerche | Synthesis of Zeolites from Fly Ash |
| CN101367529A (en) * | 2008-09-28 | 2009-02-18 | 西安建筑科技大学 | Method for synthesis of 4A molecular sieve with coal ash alkali melting method |
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103958410A (en) * | 2011-08-10 | 2014-07-30 | 爱斯科姆控股Soc有限公司 | Ultrasonic synthesis of zeolites from fly ash |
| CN104302578A (en) * | 2012-03-27 | 2015-01-21 | 西开普大学 | Synthesis of zeolite X with hierarchical morphology from fly ash |
| CN104302578B (en) * | 2012-03-27 | 2016-11-09 | 西开普大学 | There is the X zeolite of classification pattern from flying dust synthesis |
| CN103936040A (en) * | 2013-01-18 | 2014-07-23 | 新疆大学 | Ultrasonic wave acid method for extracting aluminum oxide from fly ash |
| CN103394367A (en) * | 2013-08-20 | 2013-11-20 | 东北石油大学 | Preparation method of ZSM-5 molecular sieve core shell double-layer catalyst by utilizing fly ash |
| CN103435064A (en) * | 2013-08-20 | 2013-12-11 | 东北石油大学 | Method for preparing nano-scale ZSM-5 molecular sieve by using coal ash |
| CN106082267A (en) * | 2016-06-16 | 2016-11-09 | 中国华能集团公司 | A kind of use microwave hydrothermal coupling process by coal ash for manufacturing for the method for SAPO 34 molecular sieve |
| CN106276960A (en) * | 2016-08-15 | 2017-01-04 | 贵州大学 | A kind of method of flyash microwave alkali fusion Hydrothermal Synthesis faujasite |
| CN106607006B (en) * | 2016-11-25 | 2019-07-19 | 环境保护部华南环境科学研究所 | A kind of preparation method of the adsorbent of synchronous denitrification dephosphorizing |
| CN106745470A (en) * | 2016-11-25 | 2017-05-31 | 环境保护部华南环境科学研究所 | A kind of zeolite-loaded doped by rare-earths TiO of modified coal ash2The method that catalytic degradation removes anthracene |
| CN106698587A (en) * | 2016-11-25 | 2017-05-24 | 环境保护部华南环境科学研究所 | Phenanthrene and fluoranthene photocatalytic degradation method using fly-ash zeolite load |
| CN107445185A (en) * | 2017-09-29 | 2017-12-08 | 广州百兴网络科技有限公司 | A kind of coal ash for manufacturing for aluminium polychloride method |
| CN107628632A (en) * | 2017-09-29 | 2018-01-26 | 广州百兴网络科技有限公司 | A kind of method using coal ash for manufacturing for flocculant poly aluminium chloride |
| WO2019068135A1 (en) * | 2017-10-04 | 2019-04-11 | Neomaterials Pty Ltd | Synthesis of zeolites |
| CN108383131A (en) * | 2018-02-10 | 2018-08-10 | 西安建筑科技大学 | A method of flyash being prepared into different zeolites using solid phase transformation method |
| US11154837B2 (en) | 2018-08-07 | 2021-10-26 | King Abdulaziz University | Method for making absorbent oil fly ash powder |
| US11135563B1 (en) | 2018-08-07 | 2021-10-05 | King Abdulaziz University | Method for making a water treatment adsorbent filter |
| US11110429B1 (en) | 2018-08-07 | 2021-09-07 | King Abdulaziz University | Method for removing polycyclic aromatic hydrocarbons from water using ball milled and sonicated oil fly ash powder |
| US10882022B2 (en) | 2018-08-07 | 2021-01-05 | King Abdulaziz University | Method of removing organic pollutants from water using ball milled and sonicated oil fly ash powder |
| WO2020130259A1 (en) * | 2018-12-18 | 2020-06-25 | 주식회사 포스코 | Zeolite and preparation method therefor |
| CN112195029A (en) * | 2020-10-28 | 2021-01-08 | 东北大学 | Method and device for preparing soil conditioner by using coal ash synthetic zeolite to treat wastewater |
| CN112194150A (en) * | 2020-11-11 | 2021-01-08 | 贵州理工学院 | Preparation method of fly ash-based microporous and hierarchical porous zeolite molecular sieve |
| CN112340750A (en) * | 2020-11-11 | 2021-02-09 | 贵州理工学院 | Green and efficient activation method for fly ash |
| CN113428873A (en) * | 2021-06-15 | 2021-09-24 | 辽宁科技大学 | Method for preparing fly ash-based HS-type molecular sieve by microwave alkali fusion |
| CN113375507A (en) * | 2021-06-30 | 2021-09-10 | 东北大学 | Preparation method and application of fly ash-based aircraft tail flame infrared inhibition material |
| CN113751053A (en) * | 2021-10-11 | 2021-12-07 | 中国环境科学研究院 | Catalyst suitable for low-concentration large-air-volume organic volatile matters and preparation method thereof |
| CN113751053B (en) * | 2021-10-11 | 2022-08-12 | 中国环境科学研究院 | Catalyst suitable for low-concentration large-air-volume organic volatile matters and preparation method thereof |
| CN115432713A (en) * | 2022-10-08 | 2022-12-06 | 黑龙江省能源环境研究院 | Method for preparing fly ash-based molecular sieve |
| CN115432713B (en) * | 2022-10-08 | 2024-03-12 | 黑龙江省能源环境研究院 | Method for preparing fly ash-based molecular sieve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102107878B (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102107878B (en) | Method for synthesizing fly ash zeolite by alkali fusion-microwave process | |
| CN103539137B (en) | A kind of take flyash as the method for raw material production xonotlite | |
| CN102976641A (en) | Micro-expansive moderate-heat Portland cement and production method thereof | |
| CN104843735A (en) | A method for synthesizing two different grades of A-type zeolites by utilizing coal ashes | |
| CN113401917B (en) | Preparation method for synthesizing pure-phase P-type molecular sieve by using activated fly ash silicon-aluminum insoluble phase | |
| CN102583411A (en) | Method for producing mullite by using fly ash | |
| CN101591197A (en) | A kind of method of utilizing pre-desiliconizing with high alumina fly ash to prepare calcium silicate fertilizer | |
| CN104773740A (en) | Method for synchronously preparing type-A zeolite and white carbon black with fly ash | |
| CN106745027A (en) | A kind of flyash synthesizes the method for analcime | |
| CN112209399A (en) | Method for preparing X-type zeolite from coal gangue | |
| CN109455733A (en) | A kind of method of gangue electrothermal way preparation high-quality mullite | |
| CN111847460A (en) | Method for synthesizing mesoporous silica MCM-41 by using organic silicon waste residues | |
| CN103708480A (en) | Method for preparing microcrystalline mullite from fly ash | |
| CN109354029A (en) | A method of by coal ash for manufacturing for mesopore silicon oxide | |
| CN101531523A (en) | Method for synthesizing mullite through utilization of waste | |
| CN101643359A (en) | Method for preparing porzite powder by fly ash | |
| Pei et al. | Two-step hydrothermal synthesis and conversion mechanism of zeolite X from stellerite zeolite | |
| CN104150911A (en) | Microwave-assisted low-temperature rapid synthesis method for nano silicon nitride/silicon carbide composite powder | |
| CN105036167A (en) | Calcium hexaluminate and preparation method thereof | |
| CN1673159A (en) | New coal gangue utilizing method | |
| CN103787363A (en) | Method for synthesizing Na-X and hydroxysodalite form coal ash filter cake by adopting dry method | |
| CN107840342B (en) | Utilize the method for the direct synthetic calcium silicate of soda lime sintering process red mud | |
| CN112500182B (en) | Preparation method for in-situ synthesis of mullite whisker ceramic material | |
| CN108516565A (en) | A method of preparing P type zeolite molecular sieve using aluminium calcium powder reaction slag | |
| CN109133880A (en) | A kind of preparation method of corundum-mullite light brick |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20201110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |