CN105314645A - Method for preparing chabazite from fly ash - Google Patents
Method for preparing chabazite from fly ash Download PDFInfo
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- CN105314645A CN105314645A CN201410336219.9A CN201410336219A CN105314645A CN 105314645 A CN105314645 A CN 105314645A CN 201410336219 A CN201410336219 A CN 201410336219A CN 105314645 A CN105314645 A CN 105314645A
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- chabazite
- flyash
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- fly ash
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Abstract
The invention provides a method for preparing chabazite from fly ash. The method comprises the following steps: (1) evenly stirring fly ash and solid potassium hydroxide; (2) transferring the evenly-mixed mixture to a high temperature furnace and burning the mixture; (3) grinding the burned alkaline molten substance; (4) adding water and silicon dioxide powder into the grinded substance, and evenly stirring; (5) placing the evenly-mixed liquid into a baking oven to maintain the temperature; (6) after heat preservation, taking out the substance from the baking oven, washing the substance repeatedly until the substance becomes neutral, filtering, and drying to obtain the chabazite. The provided method can obtain cheap chabazite with excellent properties, also processes and utilizes fly ash, saves the resources, and reduces the discharge of pollutants.
Description
Technical field
The invention belongs to environment, chemical industry, field of material technology, specifically a kind of coal ash for manufacturing is for the method for chabazite.
Background technology
Flyash is the primary solids refuse that coal-burning power plant discharges, and wherein contains silicon, the aluminium element of 70%.Along with China's power industry development in addition China take mainly coal as the energy, the quantity discharged of flyash increases year by year.And if a large amount of flyash does not process, just airborne dust can be produced, atmosphere pollution; If enter water system, river can be caused to silt up, toxic chemical substance wherein also can endanger human body and biological generation.At present, the processing mode of flyash still stores by expropriation of land, so not only causes serious environmental problem, meanwhile, too increases input cost.Therefore, be current China resource, environment and economy problem urgently to be resolved hurrily to the process of flyash.
Zeolite is a kind of widely used silico-aluminate ore, and can be used as sorbent material, siccative, catalyzer and washing composition etc., its kind is varied.Chabazite (CHA) is exactly wherein a kind of, its silica alumina ratio is generally between 1.6 ~ 3, and its specific surface area is large, the aperture size of internal gutter is homogeneous, there is unique adsorptivity and the zeolite of ion exchangeable, in absorbing carbon dioxide, there is higher selective adsorption, have extremely important contribution to the carbon capture technology in future.But natural zeolite limits throughput, expensive, therefore, artificial synthetic zeolite has become the important branch of chemical industry, Material Field one.
Coal ash for manufacturing is exactly that one had both saved resource for zeolite, decreases environmental pollution, again reduces the effective way of zeolite cost.At present, the technology comparative maturity of synthetic zeolite from flyash, and successfully prepared multiple zeolite.Chinese patent CN101993089 authorizes a kind of method preparing nano flyash zeolite, and the method for raw material, has synthesized X-type zeolite and sodalite with flyash and concentrated seawater; Chinese patent CN103046111A authorizes the method for a kind of coal ash for manufacturing for nanometer euthalite, and the method is also be that euthalite prepared by raw material with flyash; Chinese patent CN103204518 authorizes the method for circulating fluid bed coal ash and bottom ash synthetic zeolite, and the method is with circular fluid bed flyash be Material synthesis A type, X-type, P type zeolite.But not yet find the method for synthesis chabazite at present.
Based on above content, the present invention take flyash as raw material, and adding SiO2 is silicon source, adopts the hot legal system of alkali melt water for chabazite, significantly improves the added value of product of flyash, reduce the production cost of chabazite.
Summary of the invention
The object of the invention is to coal ash for manufacturing is standby can the chabazite of absorbing carbon dioxide.
The particular content of invention, has the following steps:
(1) flyash and potassium hydroxide (KOH) solid are mixed with 1.0:1.4 ~ 2.7, and stir, obtain mixture;
(2) calcine 30 ~ 120 minutes at the mixture of gained is placed in 550 ~ 700 DEG C in step (1), obtain alkali and melt thing;
(3), after the alkali calcined in step (2) being melted thing porphyrize, add water, make the ratio of ultrapure water and solid be 4 ~ 16;
(4) add in step (3) again in the material of water and add SiO
2powder, makes the silica alumina ratio in mixture be 1 ~ 4, and stirs;
(5) temperature of being placed in baking oven by the mixed solution stirred in step (4) is 80 ~ 100 DEG C, and soaking time is 2 ~ 8 days.；
(6) after insulation terminates, take out, and repetitive scrubbing is to neutral, obtains chabazite after filtration, drying.
In order to obtain better result of use, the present invention also adopts following measures: the flyash described in step (1) is through 800 DEG C of calcinings pre-treatment of 2 hours.
Beneficial effect:
The present invention is that chabazite prepared by raw material with solid waste coal ash, thus makes refuse reclamation, and reduce pollution, and reduce the production cost of chabazite, therefore, the present invention has the very high feature of environmental protection and economy.
Accompanying drawing explanation
Fig. 1 is the schema of coal ash for manufacturing for chabazite.
Fig. 2 is the X ray diffracting spectrum of the chabazite of synthesis.
Embodiment
Embodiment 1:
5g flyash and 10.08g potassium hydroxide solid is taken exactly with electronic balance; Two kinds of solids mixings are even, and calcine 2 hours in High Temperature Furnaces Heating Apparatus at 650 DEG C, take out the alkali calcined and melt thing, add 60mL ultrapure water after porphyrize, then take 2.43gSiO
2add wherein, constant temperature blender with magnetic force stirs, at then the mixed solution be stirred being placed in 90 DEG C, baking oven, be incubated 4 days.Take out after 4 days, repetitive scrubbing is to neutral, and filtration, drying obtain chabazite product.The degree of crystallinity of the chabazite of gained is 75%, and its X ray diffracting spectrum as shown in Figure 2.
Embodiment 2:
5g flyash and 10.08g potassium hydroxide solid is taken exactly with electronic balance; Two kinds of solids mixings are even, and calcine 1 hour in High Temperature Furnaces Heating Apparatus at 700 DEG C, take out the alkali calcined and melt thing, add 60mL ultrapure water after porphyrize, then take 2.43gSiO
2add wherein, constant temperature blender with magnetic force stirs, at then the mixed solution be stirred being placed in 90 DEG C, baking oven, be incubated 4 days.Take out after 4 days, repetitive scrubbing is to neutral, and filtration, drying obtain chabazite product.The degree of crystallinity of the chabazite of gained is 68%.
Embodiment 3:
5g flyash and 10.08g potassium hydroxide solid is taken exactly with electronic balance; Two kinds of solids mixings are even, and calcine 1 hour in High Temperature Furnaces Heating Apparatus at 650 DEG C, take out the alkali calcined and melt thing, add 60mL ultrapure water after porphyrize, then take 4.86gSiO
2add wherein, constant temperature blender with magnetic force stirs, at then the mixed solution be stirred being placed in 90 DEG C, baking oven, be incubated 4 days.Take out after 4 days, repetitive scrubbing is to neutral, and filtration, drying obtain chabazite product.The degree of crystallinity of the chabazite of gained is 72%.
Embodiment 4:
5g flyash and 12g potassium hydroxide solid is taken exactly with electronic balance; Two kinds of solids mixings are even, and calcine 1 hour in High Temperature Furnaces Heating Apparatus at 650 DEG C, take out the alkali calcined and melt thing, add 60mL ultrapure water after porphyrize, then take 2.43gSiO
2add wherein, constant temperature blender with magnetic force stirs, at then the mixed solution be stirred being placed in 90 DEG C, baking oven, be incubated 4 days.Take out after 4 days, repetitive scrubbing is to neutral, and filtration, drying obtain chabazite product.The degree of crystallinity of the chabazite of gained is 73%.
Claims (6)
1. coal ash for manufacturing is for a method for chabazite, it is characterized in that following steps:
(1) flyash and potassium hydroxide (KOH) solid are stirred, obtain mixture;
(2) gained mixture in step (1) is put into High Temperature Furnaces Heating Apparatus to calcine, obtain alkali and melt thing;
(3) alkali good for the calcining described in step (2) is melted thing porphyrize;
(4) in the material after the porphyrize described in step (3), add water and SiO 2 powder, and stir;
(5) be incubated in the mixed solution stirred in step (4) placement baking oven;
(6) after insulation terminates, take out, and repetitive scrubbing is to neutral, obtains chabazite after filtration, drying.
2. according to the method described in right 1, it is characterized in that: in step (1), flyash is through 800 DEG C of calcinings pre-treatment of 2 hours.
3. according to the method described in right 1, it is characterized in that: the mass ratio that flyash mixes with KOH is 1.0:1.4 ~ 2.7, and calcine 30 ~ 120 minutes at 550 ~ 700 DEG C.
4. according to the method described in right 1, it is characterized in that: the water added in step (4) and the ratio of solid are 4 ~ 16.
5. according to the method described in right 1, it is characterized in that: the silicon-dioxide added makes the silica alumina ratio in mixture be 1 ~ 4.
6. according to the method described in right 1, it is characterized in that: the temperature in step (5) in baking oven is 80 ~ 100 DEG C, and soaking time is 2 ~ 8 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336219.9A CN105314645B (en) | 2014-07-16 | 2014-07-16 | A kind of coal ash for manufacturing for chabasie method |
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| CN201410336219.9A CN105314645B (en) | 2014-07-16 | 2014-07-16 | A kind of coal ash for manufacturing for chabasie method |
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| CN105314645A true CN105314645A (en) | 2016-02-10 |
| CN105314645B CN105314645B (en) | 2018-03-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858680A (en) * | 2016-04-06 | 2016-08-17 | 东北大学 | Method for directly synthesizing Cu-doped zeolite CHA by taking cheap Si and Al as raw materials |
| CN108163871A (en) * | 2018-01-12 | 2018-06-15 | 东北大学 | A kind of low silica-alumina ratio chabasie method of preparation and use |
| CN108190904A (en) * | 2017-12-19 | 2018-06-22 | 华电电力科学研究院 | A kind of method and performance test methods that molecular sieve sorbing material is prepared with the direct alkali fusion-hydro-thermal method of high-calcium fly ass |
| CN114572994A (en) * | 2022-02-28 | 2022-06-03 | 西藏大学 | Zeolite-like material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442679A (en) * | 2011-09-29 | 2012-05-09 | 南开大学 | Synthetic method of chabasite |
| CN103787363A (en) * | 2013-12-17 | 2014-05-14 | 西安建筑科技大学 | Method for synthesizing Na-X and hydroxysodalite form coal ash filter cake by adopting dry method |
-
2014
- 2014-07-16 CN CN201410336219.9A patent/CN105314645B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442679A (en) * | 2011-09-29 | 2012-05-09 | 南开大学 | Synthetic method of chabasite |
| CN103787363A (en) * | 2013-12-17 | 2014-05-14 | 西安建筑科技大学 | Method for synthesizing Na-X and hydroxysodalite form coal ash filter cake by adopting dry method |
Non-Patent Citations (1)
| Title |
|---|
| 汪彬: "粉煤灰制备沸石CHA及其气体吸附性能的研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858680A (en) * | 2016-04-06 | 2016-08-17 | 东北大学 | Method for directly synthesizing Cu-doped zeolite CHA by taking cheap Si and Al as raw materials |
| CN108190904A (en) * | 2017-12-19 | 2018-06-22 | 华电电力科学研究院 | A kind of method and performance test methods that molecular sieve sorbing material is prepared with the direct alkali fusion-hydro-thermal method of high-calcium fly ass |
| CN108163871A (en) * | 2018-01-12 | 2018-06-15 | 东北大学 | A kind of low silica-alumina ratio chabasie method of preparation and use |
| CN114572994A (en) * | 2022-02-28 | 2022-06-03 | 西藏大学 | Zeolite-like material and preparation method and application thereof |
| CN114572994B (en) * | 2022-02-28 | 2024-04-12 | 西藏大学 | Zeolite-like material and its preparing process and application |
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| Publication number | Publication date |
|---|---|
| CN105314645B (en) | 2018-03-13 |
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