CN107352547A - A kind of method that white carbon is prepared using straw ash - Google Patents
A kind of method that white carbon is prepared using straw ash Download PDFInfo
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- CN107352547A CN107352547A CN201710652529.5A CN201710652529A CN107352547A CN 107352547 A CN107352547 A CN 107352547A CN 201710652529 A CN201710652529 A CN 201710652529A CN 107352547 A CN107352547 A CN 107352547A
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- white carbon
- straw ash
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- filter cake
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
The present invention provides a kind of method that white carbon is prepared using straw ash, including：Step 1, straw ash pre-processes；Step 2, water glass solution processed；Step 3, legal system white carbon is precipitated.Advantage is：A kind of method using straw ash production of silica white provided by the invention, straw ash is comprehensively utilized, and, the yield and purity for the white carbon being prepared are very high, solve the pollution problem of a large amount of agricultural wastes, make full use of resource, while improve the product purity of white carbon, coal consumption, power consumption are saved, reduces production cost.
Description
Technical field
The invention belongs to white carbon preparing technical field, and in particular to a kind of method that white carbon is prepared using straw ash.
Background technology
Agricultural crop straw is one of material enriched the most in the world, and not only quantity is big, species is more, and is distributed wide.System
Display is counted, the annual crop material in China is up to 700,000,000 tons, and majority is used for straw power generation.Ash content can be produced after straw burning,
Straw ash caused by annual at present there is no effective Application way, so as to cause to accumulate pressure and government pressure etc., expend a large amount of
Human and material resources and financial resources, if mismanagement can also cause air-borne dust to pollute, become new pollution sources.Therefore, how
Straw ash is effectively utilized, is thing in the urgent need to address at present.
The content of the invention
The defects of existing for prior art, the present invention are provided a kind of method that white carbon is prepared using straw ash, can had
Effect solves the above problems.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of method that white carbon is prepared using straw ash, comprises the following steps：
Step 1, straw ash pre-processes：The straw ash after burning that will generate electricity is placed in reactant aqueous solution kettle, at 60~80 DEG C
30-60min leaching potassium is stirred, solution is filtered, filtrate extraction potash fertilizer, filter cake is preparation white carbon black raw material；
Step 2, water glass solution processed：The filter cake and concentration that step 1 is obtained are 1.5mol/l~2.5mol/l hydrogen-oxygen
Change sodium solution and press 1g:20ml ratio stirred at 90~100 DEG C it is molten boil 4h, filter while hot and wash filter cake, concentrating filter liquor
After obtain water glass solution；
Step 3, legal system white carbon is precipitated：The water glass solution that step 2 is obtained is added in reactor, heating-up temperature to 70
The sulfuric acid solution that mass concentration 7%~10% is added at~80 DEG C carries out precipitation reaction, controls endpoint pH 7.5~9.8；Reaction
After the completion of by precipitation system still aging 1~2h times, be then separated by filtration, filter cake adjusted into pH to after neutrality, by gained
Washing of precipitate, 105 DEG C of dryings, then 600 DEG C of 2~3h of roasting of Muffle furnace are placed in, obtain white particle silica product, as hard charcoal
Black product.
Preferably, in step 3, the sulfuric acid solution of mass concentration 7%~10% is added to waterglass by the way of being added dropwise
In solution；Wherein, the sulfuric acid solution rate of addition of mass concentration 7%~10% is：1ml/min~0.2ml/min.
Preferably, in step 3, filter cake is adjusted to neutrality by pH using the sulfuric acid of mass concentration 9.5%.
A kind of method for preparing white carbon using straw ash provided by the invention has advantages below：
A kind of method using straw ash production of silica white provided by the invention, is comprehensively utilized to straw ash, also,
The yield and purity for the white carbon being prepared are very high, solve the pollution problem of a large amount of agricultural wastes, make full use of resource,
The product purity of white carbon is improved simultaneously, saves coal consumption, power consumption, reduces production cost.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet for the method that white carbon is prepared using straw ash provided by the invention.
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only to
The present invention is explained, is not intended to limit the present invention.
White carbon is a kind of excellent auxiliary agent of environmental-protecting performance, available for rubber plastic, green tire, toothpaste, coating, papermaking
Printing, integrated circuit packaging material, semi-conducting material etc..Lime-ash alkali metal content after straw ash extraction potassium is low, main component
It is exactly silicon and charcoal, is a kind of silicon source of ideal preparation HIGH-PURITY SILICON, therefore, can be used for preparing white carbon and HIGH-PURITY SILICON.
With reference to figure 1, a kind of method that white carbon is prepared using straw ash provided by the invention, comprise the following steps：
Step 1, straw ash pre-processes：The straw ash after burning that will generate electricity is placed in reactant aqueous solution kettle, at 60~80 DEG C
30-60min leaching potassium is stirred, solution is filtered, filtrate extraction potash fertilizer, filter cake is preparation white carbon black raw material；
Step 2, water glass solution processed：The filter cake and concentration that step 1 is obtained are 1.5mol/l~2.5mol/l hydrogen-oxygen
Change sodium solution and press 1g:20ml ratio stirred at 90~100 DEG C it is molten boil 4h, filter while hot and wash filter cake, concentrating filter liquor
After obtain water glass solution；
Step 3, legal system white carbon is precipitated：The water glass solution that step 2 is obtained is added in reactor, heating-up temperature to 70
The sulfuric acid solution that mass concentration 7%~10% is added at~80 DEG C carries out precipitation reaction, wherein, mass concentration 7%~10%
Sulfuric acid solution is added in water glass solution by the way of being added dropwise；Wherein, the sulfuric acid solution of mass concentration 7%~10% is added dropwise
Speed is：1ml/min~0.2ml/min.Control endpoint pH 7.5~9.8；By precipitation system still aging 1 after the completion of reaction
~2h the times, then it is separated by filtration, by filter cake with after sulphur acid for adjusting pH to the neutrality of mass concentration 9.5%, by the precipitation of gained
Washing, 105 DEG C of dryings, then 600 DEG C of 2~3h of roasting of Muffle furnace are placed in, white particle silica product is obtained, as white carbon produces
Product.The yield of white carbon black product is 85%-90%；Purity 90%-100%.
Two embodiments are described below：
Embodiment one：
Step 1, straw ash pre-processes：The straw ash after burning that will generate electricity is placed in reactant aqueous solution kettle, is stirred at 65 DEG C
30min leaches potassium, and solution is filtered, and filtrate extraction potash fertilizer, filter cake is preparation white carbon black raw material；
Step 2, water glass solution processed：The filter cake and concentration that step 1 is obtained be 2.0mol/l sodium hydroxide solution by
1g:20ml ratio stirred at 100 DEG C it is molten boil 4h, filter while hot and wash filter cake, it is molten to obtain waterglass after concentrating filter liquor
Liquid；
Step 3, legal system white carbon is precipitated：The water glass solution that step 2 is obtained is added in reactor, heating-up temperature to 80
DEG C when add the sulfuric acid solution of mass concentration 9.5% and carry out precipitation reaction, wherein, the sulfuric acid solution of mass concentration 9.5% uses
The mode of dropwise addition is added in water glass solution；Wherein, the sulfuric acid solution rate of addition of mass concentration 9.5% is：0.2ml/
min.Control endpoint pH 9.77；By the precipitation system still aging 1.5h times after the completion of reaction, then it is separated by filtration, by filter cake
After sulphur acid for adjusting pH to the neutrality of mass concentration 9.5%, by the washing of precipitate of gained, 105 DEG C of dryings, then Muffle furnace is placed in
600 DEG C of roasting 3h, obtain white particle silica product, as white carbon black product.The yield of white carbon black product is 90%；Purity
90%.
Embodiment two：
Step 1, straw ash pre-processes：The straw ash after burning that will generate electricity is placed in reactant aqueous solution kettle, is stirred at 80 DEG C
60min leaches potassium, and solution is filtered, and filtrate extraction potash fertilizer, filter cake is preparation white carbon black raw material；
Step 2, water glass solution processed：The filter cake and concentration that step 1 is obtained be 1.5mol/l sodium hydroxide solution by
1g:20ml ratio stirred at 90 DEG C it is molten boil 4h, filter while hot and wash filter cake, it is molten to obtain waterglass after concentrating filter liquor
Liquid；
Step 3, legal system white carbon is precipitated：The water glass solution that step 2 is obtained is added in reactor, heating-up temperature to 70
DEG C when add the sulfuric acid solution of mass concentration 7% and carry out precipitation reaction, wherein, the sulfuric acid solution of mass concentration 7% is using being added dropwise
Mode be added in water glass solution；Wherein, the sulfuric acid solution rate of addition of mass concentration 7% is：1ml/min.Control is eventually
Point pH value 7.5；By the precipitation system still aging 1h times after the completion of reaction, then it is separated by filtration, by filter cake mass concentration 7%
Sulphur acid for adjusting pH to neutrality after, by the washing of precipitate of gained, 105 DEG C of dryings, then be placed in 600 DEG C of Muffle furnace roasting 2h, obtain white
Coloured particles silica product, as white carbon black product.The yield of white carbon black product is 85%；Purity 95%.
A kind of method using straw ash production of silica white of the present invention, beneficial effect compared with the prior art are：This
Invention uses straw ash, and as raw material, cost is cheap, is effectively utilized resource, reduces environmental pollution, by straw ash
Leaching and follow-up roasting, improving the impurity such as yield and purity, copper, iron, calcium of product greatly reduces, the cleaning to waterglass
Key effect is served, also therefore improves the purity of white carbon finished product；Settling velocity is controlled during precipitation, particle size can be made more
It is small, good dispersion, overcome the agglomeration of particle.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (3)
- A kind of 1. method that white carbon is prepared using straw ash, it is characterised in that comprise the following steps：Step 1, straw ash pre-processes：The straw ash after burning that will generate electricity is placed in reactant aqueous solution kettle, is stirred at 60~80 DEG C 30-60min leaches potassium, and solution is filtered, and filtrate extraction potash fertilizer, filter cake is preparation white carbon black raw material；Step 2, water glass solution processed：The filter cake and concentration that step 1 is obtained are 1.5mol/l~2.5mol/l sodium hydroxide Solution presses 1g:20ml ratio stirred at 90~100 DEG C it is molten boil 4h, filter while hot and wash filter cake, after concentrating filter liquor To water glass solution；Step 3, legal system white carbon is precipitated：The water glass solution that step 2 is obtained is added in reactor, heating-up temperature to 70~80 DEG C when add mass concentration 7%~10% sulfuric acid solution carry out precipitation reaction, control endpoint pH 7.5~9.8；Reaction is completed Afterwards by precipitation system still aging 1~2h times, then it is separated by filtration, filter cake is adjusted into pH to after neutrality, by the precipitation of gained Washing, 105 DEG C of dryings, then 600 DEG C of 2~3h of roasting of Muffle furnace are placed in, white particle silica product is obtained, as white carbon produces Product.
- A kind of 2. method that white carbon is prepared using straw ash according to claim 1, it is characterised in that in step 3, matter The sulfuric acid solution for measuring concentration 7%~10% is added in water glass solution by the way of being added dropwise；Wherein, mass concentration 7%~ 10% sulfuric acid solution rate of addition is：1ml/min~0.2ml/min.
- 3. a kind of method that white carbon is prepared using straw ash according to claim 1, it is characterised in that in step 3, adopt Filter cake is adjusted into pH to neutrality with the sulfuric acid of mass concentration 9.5%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109911904A (en) * | 2019-03-20 | 2019-06-21 | 高铭鸿 | A kind for the treatment of process preparing new material using the reclaiming energy |
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| CN101177264A (en) * | 2007-10-31 | 2008-05-14 | 武汉凯迪控股投资有限公司 | Method for combined production of activative carbon, white carbon black and soda by employing biomass power plant waste |
| CN101391778A (en) * | 2008-10-09 | 2009-03-25 | 江南大学 | Method for preparing high-purity siliceous reinforcing agent by using rice hull ash as raw material |
| CN103771425A (en) * | 2014-01-17 | 2014-05-07 | 江西恒隆实业有限公司 | Production process for preparing white carbon black by use of rice hull ash |
| CN106831004A (en) * | 2016-12-27 | 2017-06-13 | 广安佰瑞德钾盐化工股份有限公司 | A kind of method of utilization generating straw ash preparing potassium sulfate |
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2017
- 2017-08-02 CN CN201710652529.5A patent/CN107352547A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177264A (en) * | 2007-10-31 | 2008-05-14 | 武汉凯迪控股投资有限公司 | Method for combined production of activative carbon, white carbon black and soda by employing biomass power plant waste |
| CN101391778A (en) * | 2008-10-09 | 2009-03-25 | 江南大学 | Method for preparing high-purity siliceous reinforcing agent by using rice hull ash as raw material |
| CN103771425A (en) * | 2014-01-17 | 2014-05-07 | 江西恒隆实业有限公司 | Production process for preparing white carbon black by use of rice hull ash |
| CN106831004A (en) * | 2016-12-27 | 2017-06-13 | 广安佰瑞德钾盐化工股份有限公司 | A kind of method of utilization generating straw ash preparing potassium sulfate |
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| Title |
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| 贵州省化工情报中心站等: "《贵州省化工产品手册》", 30 September 1988 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109911904A (en) * | 2019-03-20 | 2019-06-21 | 高铭鸿 | A kind for the treatment of process preparing new material using the reclaiming energy |
| CN109911904B (en) * | 2019-03-20 | 2021-11-02 | 高铭鸿 | Treatment process for preparing new material by utilizing recycled renewable energy |
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