CN108358211A - The method for preparing aerosil using bagasse ash - Google Patents

The method for preparing aerosil using bagasse ash Download PDF

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Publication number
CN108358211A
CN108358211A CN201810383734.0A CN201810383734A CN108358211A CN 108358211 A CN108358211 A CN 108358211A CN 201810383734 A CN201810383734 A CN 201810383734A CN 108358211 A CN108358211 A CN 108358211A
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aerosil
solution
bagasse ash
obtains
silicate solution
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张守玉
陈陆剑
黄小河
江锋浩
曹忠耀
宋晓冰
吴渊默
陶欣
张帆
张一帆
李�昊
王才威
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University of Shanghai for Science and Technology
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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
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/157—After-treatment of gels
    • C01B33/158—Purification; Drying; Dehydrating
    • C01B33/1585—Dehydration into aerogels
    • 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
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/152—Preparation of hydrogels
    • 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
    • C01P2006/12—Surface area
    • 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
    • C01P2006/14—Pore volume

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

The present invention provides a kind of methods preparing aerosil using bagasse ash, which is characterized in that includes the following steps：Step 1 mixes bagasse ash with sodium hydroxide solution, and heating boils and continues to stir, and sodium metasilicate filtrate is obtained by filtration；Sodium metasilicate filtrate is mixed with acid-exchange resin and persistently stirs to get silicate solution by step 2；Step 3, trim,ethylchlorosilane is added into silicate solution, and 10~40min of stirring obtains first modified solution；Step 4, hexamethyldisilazane is added into first modified solution, and 10~40min of stirring obtains twice-modified solution；Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4；Silica hydrogel is carried out standing isothermal holding and obtains gel by step 6；Gel is dried under normal pressure to obtain aerosil for step 7.

Description

The method for preparing aerosil using bagasse ash
Technical field
The present invention relates to a kind of methods preparing aerosil, and in particular to a kind of to prepare two using bagasse ash The method of silica aerogel.
Background technology
Bagasse is the remaining cellulose fibre after extracting juice containing candy in sugarcane, is the principal by product of sugar industry, While and abundant available resources.Similar with most of other biological materials, bagasse contains high volatile organic matter. Therefore, bagasse is a kind of cheap potential energy source；Most of sugar refineries (including Indonesian sugar refinery) all use sweet Bagasse handles sugarcane as main fuel, to generate almost enough energy.Burning bagasse, which generates energy, will cause to produce Raw a large amount of useless ash, this will also result in process problem.Increasingly increase due to people to the concern of environmental problem also pacifies green Full processing bagasse ash proposes requirement.
In the prior art, aerosil is usually using organic alkoxide (costly and hazardous precursor) and supercritical drying Dry process synthesizes, wherein and machine alkoxide is costly and hazardous precursor, supercritical drying process can consume huge energy. In addition, relatively low (the about 160m of the surface area of the aerosil prepared in the prior art2/ g), this also counteracts it Use as adsorbent and catalyst carrier.
Waterglass (sodium metasilicate) is the feasible and cheap substitute of alkoxide precursor.Sodium metasilicate is produced with biomass ash Cost is relatively low, and operation is also easier, but needs to be dried using the method for supercritical drying, and this method and process Period is long, low output, of high cost.Although coal dust ash can be dried to prepare silica gas under ambient pressure after treatment Gel, but coal dust ash generally requires that by high temperature pretreatment sodium metasilicate could be produced, and this process is highly energy-consuming.It is above-mentioned Factor limits the business application of these materials.
Invention content
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of preparing dioxy using bagasse ash The method of SiClx aeroge.
The present invention provides a kind of methods preparing aerosil using bagasse ash, have the feature that, Include the following steps：Step 1 mixes bagasse ash with sodium hydroxide solution, and heating boils and continues to stir, and is cooled to room It carries out that sodium metasilicate filtrate is obtained by filtration after temperature；Sodium metasilicate filtrate is mixed with acid-exchange resin and is persistently stirred by step 2 It mixes to obtain silicate solution；Step 3, trim,ethylchlorosilane is added into silicate solution, and 10~40min of stirring is modified for the first time Solution；Step 4, hexamethyldisilazane is added into first modified solution, and 10~40min of stirring obtains twice-modified solution； Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4；Step 6, by dioxy SiClx hydrogel carries out standing isothermal holding and obtains gel；Gel is dried under normal pressure to obtain silica for step 7 Aeroge, wherein in step 3, the mass ratio of silicate solution and trim,ethylchlorosilane is 1:0.03~1:0.05, in step 4, Silicate solution and the mass ratio of hexamethyldisilazane are 1:0.04~1:0.06.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 1, the quality of bagasse ash is 10g, and the substance withdrawl syndrome of sodium hydroxide solution is 2mol/L, body Product is 60mL.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 1, the time that stirring is boiled and continued in heating is 1h.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 1, it is ashless filter paper to filter used filter paper.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 2, the volume ratio of sodium metasilicate filtrate and acid-exchange resin is 1:2.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 2, the time persistently stirred is 1h.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 2, the pH value of silicate solution is about 2.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 6, standing isothermal holding includes：Heat preservation 18h is stood at 40 DEG C, and heat preservation 1h is then stood at 60 DEG C.
Using bagasse ash the method for aerosil is prepared provided by the invention, can also had such Feature：Wherein, in step 7, dry temperature is 80 DEG C, and the time is for 24 hours.
The effect of invention
According to the method according to the present invention for preparing aerosil using bagasse ash, because utilizing bagasse Ash produces aerosil for raw material, has not only solved the green process problem of bagasse ash, but also solve silica The production of aeroge carrys out source problem, greatly reduces production cost.In addition, producing titanium dioxide using bagasse ash for raw material During silica aerogel, the highest process of processing procedure energy consumption to bagasse ash is also only boiling part, reduces energy consumption； Trim,ethylchlorosilane and hexamethyldisilazane is used to be modified silicate solution successively, enabling to be done under normal pressure It is dry to obtain aerosil, reduce production cost.Also, this method also improves the surface of aerosil Product.
Further, the mass ratio for specifying silicate solution and trim,ethylchlorosilane is 1:0.03~1:0.05, silicate solution Mass ratio with hexamethyldisilazane is 1:0.04~1:0.06 so that the modifying process of silicate solution at most only needs 80min can be completed, and greatly shorten modification time, improve the production efficiency of aerosil.
Specific implementation mode
It is real below in order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand Example is applied to be specifically addressed the present invention using the method that bagasse ash prepares aerosil.
<Embodiment one>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 30min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.04, stirring 30min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 439.15 ± 7.0m2/ g, hole body Product is 0.76 ± 0.01cm3/g。
<Embodiment two>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 30min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.05, stirring 30min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 535.06 ± 8.0m2/ g, hole body Product is 1.78 ± 0.05cm3/g。
<Embodiment three>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 30min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 30min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 1120.35 ± 10.1m2/ g, hole Volume is 2.09 ± 0.03cm3/g。
<Example IV>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.04, stirring 30min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 30min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 615.84 ± 8.0m2/ g, hole body Product is 1.81 ± 0.20cm3/g。
<Embodiment five>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.05, stirring 30min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 30min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 452.31 ± 19.68m2/ g, hole Volume is 1.03 ± 0.15cm3/g。
<Embodiment six>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 10min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 10min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 805.51 ± 9.0m2/ g, hole body Product is 1.89 ± 0.02cm3/g。
<Embodiment seven>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 20min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 20min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 940.81 ± 9.3m2/ g, hole body Product is 1.98 ± 0.04cm3/g。
<Embodiment eight>
10g bagasse ash and volume are the sodium hydroxide solution one that 60mL substance withdrawl syndromes are 2mol/L by step 1 It rises and is put into 250mL conical flasks, automatic heating and stirring device is opened, 1h is boiled, after being cooled to room temperature, uses Whatman The filtering of no.41 ashless filter papers is filtered to obtain sodium metasilicate filtrate.
Step 2, by sodium metasilicate filtrate and acid-exchange resin with 1：2 volume ratio is mixed and continues to stir 1h obtains silicate solution.The pH of the silicate solution is about 2.
Trim,ethylchlorosilane, the mass ratio of silicate solution and trim,ethylchlorosilane are added into silicate solution for step 3 It is 1：0.03, stirring 40min obtains first modified solution.
Step 4, is added hexamethyldisilazane into first modified solution, silicate solution and hexamethyldisilazane Mass ratio is 1：0.06, stirring 40min obtains twice-modified solution.
Step 5 adjusts twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4.
Silica hydrogel is stood heat preservation 18h under the conditions of 40 DEG C, is then stood under the conditions of 60 DEG C by step 6 Heat preservation 1h obtains gel.
Step 7, by gel, drying obtains aerosil for 24 hours under the conditions of normal pressure, 80 DEG C.
It is measured by experiment, the surface area for the aerosil being prepared is 1011.31 ± 10.01m2/ g, hole Volume is 2.03 ± 0.02cm3/g。
The effect of embodiment
The method for preparing aerosil using bagasse ash involved by the present embodiment, because utilizing sugarcane Slag ash produces aerosil for raw material, has not only solved the green process problem of bagasse ash, but also solve titanium dioxide The production of silica aerogel carrys out source problem, greatly reduces production cost.In addition, producing dioxy using bagasse ash for raw material In SiClx aerogel process, the highest process of processing procedure energy consumption to bagasse ash is also only boiling part, reduces energy Consumption；Use trim,ethylchlorosilane and hexamethyldisilazane to be modified silicate solution successively, enabling under normal pressure into Row is dried to obtain aerosil, reduces production cost.
Further, the mass ratio for specifying silicate solution and trim,ethylchlorosilane is 1:0.03~1:0.05, silicate solution Mass ratio with hexamethyldisilazane is 1:0.04~1:0.06 so that the modifying process of silicate solution at most only needs 80min can be completed, and greatly shorten modification time, improve the production efficiency of aerosil.
Further, it stands isothermal holding to carry out at two different temperature, can either preferably obtain gel, and energy It is enough to shorten the time for standing isothermal holding.
The above embodiment is the preferred case of the present invention, is not intended to limit protection scope of the present invention.

Claims (9)

1. a kind of method preparing aerosil using bagasse ash, which is characterized in that include the following steps：
Step 1 mixes bagasse ash with sodium hydroxide solution, and heating boils and continues to stir, and is carried out after being cooled to room temperature Filter obtains sodium metasilicate filtrate；
The sodium metasilicate filtrate is mixed with acid-exchange resin and persistently stirs to get silicate solution by step 2；
Step 3, trim,ethylchlorosilane is added into the silicate solution, and 10~40min of stirring obtains first modified solution；
Step 4, hexamethyldisilazane is added into the first modified solution, and 10~40min of stirring obtains twice-modified molten Liquid；
Step 5 adjusts the twice-modified solution with Ammonia and obtains silica hydrogel to pH for 4；
The silica hydrogel is carried out standing isothermal holding and obtains gel by step 6；
The gel is dried under normal pressure to obtain aerosil for step 7,
Wherein, in step 3, the mass ratio of the silicate solution and the trim,ethylchlorosilane is 1:0.03~1:0.05,
In step 4, the mass ratio of the silicate solution and the hexamethyldisilazane is 1:0.04~1:0.06.
2. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 1, the quality of the bagasse ash is 10g,
The substance withdrawl syndrome of the sodium hydroxide solution is 2mol/L, volume 60mL.
3. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 1, the time that stirring is boiled and continued in the heating is 1h.
4. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 1, filter paper used in the filtering is ashless filter paper.
5. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 2, the volume ratio of the sodium metasilicate filtrate and the acid-exchange resin is 1:2.
6. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 2, the time persistently stirred is 1h.
7. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 2, the pH value of the silicate solution is about 2.
8. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 6, the standing isothermal holding includes：
Heat preservation 18h is stood at 40 DEG C, and heat preservation 1h is then stood at 60 DEG C.
9. the method according to claim 1 for preparing aerosil using bagasse ash, it is characterised in that：
Wherein, in step 7, the temperature of the drying is 80 DEG C, and the time is for 24 hours.
CN201810383734.0A 2018-04-26 2018-04-26 The method for preparing aerosil using bagasse ash Pending CN108358211A (en)

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* Cited by examiner, † Cited by third party
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CN113336231A (en) * 2021-06-30 2021-09-03 同济大学 Method for preparing aerogel by taking municipal incineration waste ash as raw material through normal pressure drying

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Application publication date: 20180803