CN101785990B - Method for preparing activated carbon-silicon dioxide mixed adsorbing material by using silicon tetrachloride - Google Patents
Method for preparing activated carbon-silicon dioxide mixed adsorbing material by using silicon tetrachloride Download PDFInfo
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Abstract
The invention relates to a method for preparing an activated carbon-silicon dioxide mixed adsorbing material by using silicon tetrachloride, in particular to the method for preparing the adsorbing material by using a byproduct of polycrystalline silicon, namely SiCl4, which comprises the following steps: firstly, adding solid powders, such as alkaline oxide and calcium salt and the like into water with stirring until the solid powders are fully dissolved, and adding a small amount of carbon-containing substance; secondly, adding the byproduct of the polycrystalline silicon, namely the SiCl4, and the balance of carbon-containing substance for fully stirring, and standing the mixture for a night; and finally, activating the mixture for 3 to 5h at the holding temperature of 600 to 800 DEG C in a muffle furnace, taking the mixture out after cooling, washing the mixture with distilled water until the mixture contains no Cl-, and pumping, drying, weighing to obtain the product. In the method, hydrochloric acid prepared by hydrolyzing the byproduct of the polycrystalline silicon, namely the SiCl4, is directly mixed with a proper amount of chemical reagent and raw materials, and the mixture is activated to obtain the activated carbon-silicon dioxide mixed adsorbing material; and the method has the advantages of simple process, abundant raw materials and low cost, and effectively solves the problem of comprehensive application of the silicon tetrachloride, biomass and carbon-containing waste.
Description
Technical field
The present invention relates to the comprehensive utilization of novel environmental material preparation and waste material.Through producing silicic acid and hydrochloric acid with silicon tetrachloride (being mainly the polysilicon accessory substance) and water reaction; Utilize the hydrochloric acid of its generation to produce activator with a certain amount of chemical reagent; And with carbonaceous refuse (being mainly reproducible living beings) activation at high temperature, make the porous activated carbon-silicon dioxide mixed adsorbing material, be mainly used in environmental wastewater and handle; Also useful as catalysts and catalyst carrier material also can be developed other special type function material through production technology adjustment and further modification.
Background technology
Active carbon is a kind of outward appearance black in color of mainly being processed by carbonaceous material; The internal void structure is flourishing, specific area is big; And also having more tiny hole, material capillaceous in the carbon granule, this capillary has very strong adsorption capacity, ability adsorbed gas, dye decolored; To benzene, toluene, aldehydes matter, and organic pollution, petroleum pollution and heavy metal ion all have stronger adsorption capacity.Active carbon also has stronger adaptive capacity to the variation of water quality, water temperature and the water yield simultaneously.Active carbon generally is divided into following several types: powdered activated carbon: generally use wood chip, coal to be raw material; Process through technologies such as charing, activation, abrasive dusts, be mainly used in Static Adsorption operation (intermittent operation) and handle to water deodoring, taste removal and less industry or the municipal sewage treatment of scale.Granular activated carbon: can be divided into cocoanut active charcoal, active fruit shell carbon and coal mass active carbon by different materials.
Based on the excellent absorption property of active carbon, become the maximum consumer field of active carbon gradually from the 60 to 70's environmental protection in last century, comprise that the environmental protection of gas, liquid absorption accounts for more than 60% of the total consumption of developed country with active carbon.Drinking water, urban domestic wastewater, industrial wastewater the people of developed country all adopt three grades of purifications that comprise charcoal treatment basically.Recent two decades comes the continuous development along with science and technology, and the various goods of active carbon continue to bring out, like super fine activated carbon, multi-functional mixed active charcoal etc.Be carrier loaded hydrated ferric oxide for example, can improve the absorption property of material effectively glyphosate in the aqueous solution with active carbon.(patent: US Pat No.4,968,518) share active carbon and silica, can reduce hydroxy compounds effectively.(patent: US Pat No.4,125,482, merck; US Pat No.4,150,045, Calgon) utilize the precoating filtering technique of active carbon and silica, can from edible oil, remove pigment, glue, soap and phosphatide, both saved time, unlike the such Chinese honey locust thin liquid that produces of alkali washing process, save emission treatment again.(patent: 200410018016) calcium chloride-active carbon mixed adsorbent has and reaches special adsorption effect preferably.Simultaneously, also useful as catalysts and catalyst cut body to active carbon.Active carbon as catalyst carrier can be used to handle multiple trace heavy metal ion and micro-content organism in the water, and has big specific area and heat endurance.
The preparation active carbon can adopt any material of carbon containing to make raw material; Like wooden burgy, coal, shell, edible fungus culturing waste material, scrap rubber, waste plastics; Pitch; Leather scrap etc., through physics method, chemical method or chemistry and physics method combine the pore structure of active carbon is regulated and control, thereby produce the active carbon of different performance.All can produce active carbon preferably like rice straw, coal, bamboo, scraped car tire, coffee grounds.The activator that in chemical method, uses; Zinc chloride, calcium chloride, potash, phosphoric acid, potassium dihydrogen phosphate, potassium sulfide, sulfuric acid, hydrochloric acid (or hydrogen chloride), potassium hydroxide, NaOH, boric acid etc. are arranged usually; Other many acid, alkali, salt also can be used as activator, need consider to adopt which kind of activator according to the performance and the economy of active carbon.Though for example zinc chloride activation method belongs to maturation process, the quality of activated carbon of production is good, and cost is higher.And the active carbon of physics method activation: for example earlier with after the raw material charing; Make activator with steam, about 1000 ℃ of reaction temperature generates active carbon; The physics method is produced the useful environmental protection of active carbon; But raw materials used quality requirement is higher, and adsorption effect is produced active carbon not as chemical method usually, and energy resource consumption is too big.
Preparation of Activated Carbon research work both domestic and external in recent years is also more and more active.But the greatest problem that all the time hinders activated carbon application development is high production prices, so domestic and international research work concentrates on and how to utilize the abandoned biomass energy cheap and easy to get to prepare the wood activated charcoal with high-specific surface area to receive much attention always.
The adsorbent that is used for water treatment at present removes active carbon, also has diatomite, silica, activated alumina, zeolite and ion exchange resin etc.Wherein aluminium-silicon is that adsorbent is hydrophilic adsorbent, and the material of polarity is had the absorption of selection, so the adsorbent of Chang Zuowei hygroscopic agent, dehydrating agent and refining non-polar solution.And active carbon is the hydrophobicity adsorbent, and the organic matter in the aqueous solution is had stronger suction-operated, the adsorbent that Chang Zuowei municipal sewage and Industrial Wastewater Treatment are used.Because also there is loose structure in amorphous silica; It is a kind of little adsorbent; Can adsorb multiple particulate, molecule, in addition, also have flocculation; So at present to employing silicon tetrachloride production porous and low-density amorphous silica, and the research of the absorption property aspect of composite also more and more widely.
Along with large-scale developing and utilizing of green energy resource solar energy, the purposes of photovoltaic cell raw material polysilicon more and more widely, Chinese polysilicon total output increases year by year, but the safety of the silicon tetrachloride as by-product of production of polysilicon and environmental issue become increasingly conspicuous.Multipath digestion silicon tetrachloride seems how particular importance, particularly Leshan, Sichuan as national silicon materials industrial base, have made full use of the important topic that silicon tetrachloride is a lot of experts and scholars' joint researches always.At present; The method of processing silicon chloride mainly contains: 1, the heavy method of deciding of preparation silicon-dioxide powdery and hydrolysis produces silica; But using value and market are little, utilize the fume colloidal silica silica of silicon tetrachloride production high added value, but white carbon market are less relatively.2, patent (US4416862 (A)) relates to the technology of producing silica and alchlor with silicon tetrachloride, but has separation difficulty, the problem that added value of product is not high.3, utilize hydrogen to pay close attention to the primary raw material trichlorosilane that silicon tetrachloride is reduced to polysilicon at most at present under the HTHP, its conversion ratio is crucial, and related patent U.S. Patent No. (CN101445245) is also arranged, but because hydrogenation technology is not mature enough.The problem of domestic present maximum is product trichlorosilane (SiHCl
3) yield not high enough, the cost that reclaims trichlorosilane also possibly be higher than the cost of Direct Production trichlorosilane, causes this technology that the comprehensive utilization of silicon tetrachloride is not also played a significant role.4, as producing ethyl orthosilicate, mainly as crosslinking agent, technology is simple, but market is little.5, produce more novel organosilicon compounds, also have many technical barriers.6, if produce polysilicon with sodium and zinc reduction silicon tetrachloride, technical feasibility, but cost is higher.7, available silicon tetrachloride is produced fiber optic materials, but fiber optic materials use material as a kind of communication, and gross tonnage is less, and it is also very limited that dependence optical fiber level silicon tetrachloride consumes the amount of silicon tetrachloride as by-product of polysilicon.In a word, up till now for this reason, polysilicon industry silicon tetrachloride takes place to arrange phenomenon steathily and also happens occasionally, and it is very big to rivers and environmental pollution that its hydrolysis produces a large amount of hydrochloric acid.
Summary of the invention
The object of the present invention is to provide a kind of silicon tetrachloride to be used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, particularly utilize polysilicon accessory substance SiCl
4Preparation active carbon-SiO
2The method of mixed adsorbing material.Technology of the present invention is simple, and the hydrochloric acid that directly utilizes the silicon tetrachloride as by-product of polysilicon hydrolysis to produce mixes with an amount of chemical reagent (according to arts demand, also can no longer add chemical reagent) and raw material, and activated back obtains active carbon-SiO
2Mixed adsorbing material, and abundant raw material, cost is low, efficiently solves the integrated application of silicon tetrachloride and living beings and carbonaceous wastes.
The present invention realizes goal of the invention by following know-why.
Because its hydrolysis of silicon tetrachloride as by-product of polysilicon produces orthosilicic acid (H
4SiO
4), ionization equilibrium constant K
1=2.2 * 10
-10(30 ℃), and orthosilicic acid (being exactly that silicic acid adds 1 water) is more stable than silicic acid, so have orthosilicic acid in the aqueous solution.SiCl
4+ 4H
2O=H
4SiO
4+ 4HCl H
4SiO
4Lose 1 molecular water and become H
2SiO
3, if be decomposed into silica and water when being heated to more than 150 ℃.And silica has been through activation processs such as acid, heat, also obtained dilatation, and its hole increases, and adsorptivity strengthens.In the heating dehydration process, itself in activation process, possibly also have an activation process to carbon as a kind of weak acid and this to silicic acid as a kind of weak acid.The a large amount of hydrochloric acid that produce when most importantly utilizing the silicon tetrachloride hydrolysis are used its highly acid, with an amount of basic anhydride like (calcium oxide, zinc oxide, aluminium oxide etc.), alkali (like NaOH; Liquefied ammonia etc.), salt (trbasic zinc phosphate, calcium phosphate; Calcium oxalate etc.), also can select for use can with the mineral matter of silicon tetrachloride hydrolysis hydrochloric acid reaction and number of chemical combination of agents generation activator, and with the material of various carbon containings (like wood chip, edible fungus culturing waste material, wooden burgy; Coal, shell, scrap rubber, leather scrap etc.) mix; High-temperature activation cleans and the dry product that gets.
Concrete technical scheme of the present invention is following:
Silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
A, Yu Shuizhong add basic anhydride or calcium salt pressed powder, and are stirred well to solid and dissolve fully, are incorporated as this material of carbonaceous material gross weight 10%～30% then; Perhaps directly in water, be incorporated as this material of carbonaceous material gross weight 10%～30%;
Fully stir behind B, the adding carbonaceous material, add polysilicon accessory substance SiCl then
4, stir the carbonaceous material that the back adds surplus more fast, get product mixture;
C, the product mixture of step B is fully stirred the back place a night, it is fully flooded, in temperature controlling instruments, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, and be washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
Basic anhydride described in the steps A comprise calcium oxide, zinc oxide or aluminium oxide etc.
Calcium salt described in the steps A comprises calcium phosphate or calcium oxalate etc.
The weight of water described in the steps A is basic anhydride or calcium salt 14～50 times.
The gross weight of carbonaceous material described in the steps A is 13%～20% of a water weight.
Carbonaceous material described in steps A or the B comprises wood chip, edible fungus culturing waste material, wooden burgy, coal, shell, scrap rubber or leather scrap etc.
The accessory substance of polysilicon described in step B SiCl
4Addition, by milliliter/restrain 0.5～1.0 times into the carbonaceous material gross weight.
Temperature controlling instruments described in the step C is that controllable silicon temperature controlling device has another name called Muffle furnace etc.
Beneficial effect of the present invention shows:
1,, and flocculation is arranged because active carbon is the hydrophobicity adsorbent, and silica is the hydrophily adsorbent, thereby active carbon-SiO of making of the present invention
2Mixed adsorbing material has special adsorption effect, be used for the waste water treatment efficiency height, and cost is low.
2, technology of the present invention is simple, does not have the problem of separation difficulty, and the hydrochloric acid that directly utilizes the silicon tetrachloride as by-product of polysilicon hydrolysis to produce mixes with an amount of chemical reagent and raw material, and activated back obtains active carbon-SiO
2Mixed adsorbing material, and abundant raw material, cost is low, efficiently solves the integrated application of silicon tetrachloride and living beings and carbonaceous wastes, and crucial effect has been played in environmental protection.
The specific embodiment
Get the 500mL beaker of 14 dried and clean; Be numbered instance 1-14; Press shown in the table 1, in 14 beakers, add a certain amount of distilled water 100mL or 150mL respectively, add the chemical reagent (also can not adding) of different amounts again: like calcium oxide, alundum (Al, zinc oxide or calcium phosphate; Stir, it is fully dissolved.Take by weighing each 20g of raw material (wood chip, edible fungus culturing waste material or peanut shell) of having dried then, earlier in each beaker, go into this raw material of 3～5g, wait to stir fully after, in fume hood, add the SiCl of different amounts again
4, stir fast, make its abundant hydrolysis and reaction, add remaining raw material more respectively; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and the cooling back is taken out and is washed with distilled water to no Cl respectively
-Till (detecting) with nitrate reagent, drain, dry, weigh, product.
The concrete prescription of table 1 instance 1-14
| Sequence number | Raw material 1 (g) | Distilled water (mL) | Chemical reagent 2 (g) | Silicon tetrachloride (mL) |
| Instance 1 | 20.0 wood chip | 100 | 3.0 calcium oxide | 15 |
| Instance 2 | 20.0 wood chip | 100 | 4.0 calcium oxide | 15 |
| Instance 3 | 20.0 wood chip | 100 | 5.0 calcium oxide | 15 |
| Instance 4 | 20.0 wood chip | 100 | 6.0 calcium oxide | 15 |
| Instance 5 | 20.0 wood chip | 150 | —— | 15 |
| Instance 6 | 20.0 wood chip | 150 | 5.0 calcium oxide | 20 |
| Instance 7 | 20.0 wood chip | 150 | 5.0 calcium oxide | 25 |
| Instance 8 | 20.0 wood chip | 150 | 7.0 calcium oxide | 15 |
| Examination example 9 | 20.0 edible fungus culturing waste material | 150 | 4.0 calcium oxide | 15 |
| Instance 10 | 20.0 wood chip | 150 | 4.0 zinc oxide | 15 |
| Instance 11 | 20.0 wood chip | 150 | 4.0 alundum (Al | 15 |
| Instance 12 | 20.0 wood chip | 150 | 4.0 calcium oxide | 0 |
| Instance 13 | 20.0 wood chip | 150 | 4.0 calcium phosphate | 15 |
| Instance 14 | 20.0 peanut shell | 150 | 4.0 calcium oxide | 15 |
Performance test to above-mentioned instance 1-14 gained material is following:
One, used instrument: controllable silicon temperature controller (Muffle furnace) KSY-9D-16 Shenyang City Energy-saving electric stove factory
UV/ViS?Spectrophotometer V-530 JASCO
Two, material and reagent:
Silicon tetrachloride is taken from Leshan new light silicon industry polysilicon accessory substance or commercially available
All chemical reagent and dyestuff are commercially available
Three, experiment detection scheme:
The mensuration of (1) methylene blue being adsorbed
Because this new material does not have country and industry relevant criterion, following standard, i.e. HG/3491-1999 active carbon chemical reagent chemical industry standard of reference when its methylene blue absorption property of research.
Activated carbon sample 0.2g after taking by weighing the loss on drying of producing on the assay balance places the 100mL conical flask, adds the methylene blue solution of the 1g/L of number of columns down.
Analyze the pure 1mL dilution 30.00mL that gets
Chemical pure is got 1mL dilution 24.00mL
Back 25 ℃ of vibrations 15 minutes in constant temperature oscillator, and then filter after static 20 minutes, the filtrating color must not be deeper than with volume standard comparison solution.
Annotate: measure the methylene blue solution 1mL of 1g/L during the preparation of standard comparison solution, be diluted to 1000mL (1/30mg.mL
-1), get and the identical volume of filtrating colorimetric (through the above active carbon of optical colorimetry all considerably beyond HG/3491-1999 active carbon chemical reagent chemical industry standard).In order further to measure their difference, standard methylene blue concentration is enlarged 5 times of (5/30mg.mL to methylene blue absorption
-1), record absorbance at maximum absorption wavelength 665nm place and be respectively:
5/30mg.ml
-1Methylene blue: 1.8535
Instance 1:1.6369 instance 2:0.5828 instance 3:1.6834
Instance 4:0.6902 instance 5:1.7129 instance 6:1.2297
Instance 7:1.4861 instance 8:1.5079 instance 9:0.4216
Instance 10:1.5935 instance 11:1.7396 instance 12:1.7717
Instance 13:1.2769 instance 14:1.0878
Can find out from above data: it is best to the methylene blue adsorption effect to take the described material that is made by the edible fungus culturing waste material of instance 9, and absorbance can drop to 0.4216, and is minimum.Instance 5 though the adsorption effect relative mistake is a little, but still has adsorption effect owing to do not add calcium oxide.
(2) to the absorption of other industrial dyestuff
Acid dyes and reactive dye are one of dyestuff with the most use on market.Take by weighing various active carbon 0.20g respectively, add two kinds of dyestuffs that 15ml joins concentration 504mg/L, the 15min that under 25 ℃ of conditions, vibrates, 25min is left standstill in taking-up again, and suction filtration must be filtrated and carried out absorbance measuring, measures its percent of decolourization=(A0-A)/A0 * 100%.A0 is the absorbance of original liquid, and A is the absorbance of absorption back dye liquor: its result is following:
Table 2 instance 1-14 gained material is to the absorption result of reactive dye and acid dyes
Can find out that from table 2 when the dye liquor concentration height arrived 504mg/L, instance 1-14 all had decolorizing effect preferably to dyestuff, the percent of decolourization to acid dyes is higher generally, is up to instance 2, can reach 95.96 (%).Instance 9 also can reach 90.15 (%) by the material that the edible fungus culturing waste material makes.
Claims (9)
1. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 100mL distilled water, add the 3g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
2. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 100mL distilled water, add the 4g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
3. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 100mL distilled water, add the 5g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
4. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 100mL distilled water, add the 6g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
5. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 150mL distilled water, add the 5g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 20mLSiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
6. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 150mL distilled water, add the 5g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 25mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
7. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 150mL distilled water, add the 7g calcium oxide again, stir, it is fully dissolved, take by weighing the wood raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mLSiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining wood raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
8. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 150mL distilled water, add the 4g calcium oxide again, stir, it is fully dissolved, take by weighing the edible fungus culturing scrap feed material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining edible fungus culturing scrap feed material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
9. silicon tetrachloride is used for the preparation of activated carbon-silicon dioxide mixed adsorbing material, it is characterized in that: processing step is following:
In beaker, add 150mL distilled water, add the 4g calcium oxide again, stir, it is fully dissolved, take by weighing the peanut shell raw material 20g of having dried then, add this raw material of 3～5g earlier, wait to stir fully after, in fume hood, add 15mL SiCl
4, stir fast, make its abundant hydrolysis and reaction, add remaining peanut shell raw material again; After fully stirring, place a night, it is fully flooded, in Muffle furnace, keeping temperature then is 600 ℃～800 ℃ following activation 3～5 hours, and take out the cooling back, is washed with distilled water to no Cl
-Till, drain, dry, weigh, product.
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| CN101014533A (en) * | 2004-04-13 | 2007-08-08 | 思择股份有限公司 | Composition and method for making silicon-containing products |
| CN101386409A (en) * | 2008-10-16 | 2009-03-18 | 昆明理工大学 | Method for preparing silicon carbide nano line |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014533A (en) * | 2004-04-13 | 2007-08-08 | 思择股份有限公司 | Composition and method for making silicon-containing products |
| CN101386409A (en) * | 2008-10-16 | 2009-03-18 | 昆明理工大学 | Method for preparing silicon carbide nano line |
Non-Patent Citations (2)
| Title |
|---|
| JP昭62-216911A 1987.09.24 |
| R.K.GILPIN et al..PREPARATION AND CHARACTERIZATION OF SILICA-CARBON HYBRIDS.《Carbon》.1997,第35卷(第1期),133-139. * |
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