Method for preparing sintering-free high-stability mesoporous silica-aluminum material from silica fume and aluminum ash and product

A technology of mesoporous silica and high stability, applied in the direction of chemical instruments and methods, aluminum silicate, silicon compounds, etc., can solve the problems of complex related properties in the preparation process, and achieve the effect of simple preparation process

Active Publication Date: 2020-06-05
浙江慧科环保科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process is relatively complicated and requires additional high-tempera

Method used

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  • Method for preparing sintering-free high-stability mesoporous silica-aluminum material from silica fume and aluminum ash and product
  • Method for preparing sintering-free high-stability mesoporous silica-aluminum material from silica fume and aluminum ash and product
  • Method for preparing sintering-free high-stability mesoporous silica-aluminum material from silica fume and aluminum ash and product

Examples

Experimental program
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Example Embodiment

[0021] Example 1 The influence of the mass ratio of silica fume and aluminum fume on the pore development and stability of the prepared non-sintering mesoporous silica alumina material

[0022] According to the mass ratio of silica fume and aluminum fume 2.5: 100, 3.5: 100, 4.5: 100, 5: 100, 10: 100, 15: 100, 15.5: 100, 16.5: 100, 17.5: 100, respectively weigh the silica fume and aluminum Ash, mix, and grind at a high speed for 5 minutes at 500 rpm to obtain nine groups of activated silicon-aluminum-doped ash. Dissolve ammonium bicarbonate in water to prepare a 2M ammonium bicarbonate aqueous solution. Weigh ammonium bicarbonate aqueous solution and activated silicon-aluminum-doped ash according to the liquid-to-solid ratio of 1:1mL / mg, mix them, stir at 30rpm, and carry out low-temperature plasma irradiation for 1 hour to obtain nine groups of silicon-aluminum-doped pastes , The operating voltage of low-temperature plasma irradiation is 10KV, and the operating atmosphere is oxy...

Example Embodiment

[0032] Example 2 The influence of the concentration of ammonium bicarbonate on the pore development and stability of the prepared non-sintering mesoporous silica alumina material

[0033] The silica fume and the aluminum fume are weighed according to the mass ratio of the silica fume and the aluminum fume of 10:100, mixed, and milled at a high speed for 10 minutes under the condition of a rotating speed of 1500 rpm to obtain an activated silicon doped aluminum fume. Dissolve ammonium bicarbonate in water, prepare 9 groups of ammonium bicarbonate aqueous solutions of 1M, 1.5M, 1.8M, 2M, 4M, 6M, 6.2M, 6.5M, 7M, and weigh according to the liquid-to-solid ratio 2:1mL / mg Ammonium bicarbonate aqueous solution and activated silicon aluminum-doped ash were mixed, stirred at 90 rpm, and low-temperature plasma irradiation was performed for 1.5 hours at the same time, to obtain nine groups of silicon-aluminum-doped slurries. The applied voltage of low-temperature plasma irradiation was 30KV....

Example Embodiment

[0038] Example 3 The effect of the applied voltage of low-temperature plasma irradiation on the pore development and stability of the prepared sinter-free mesoporous silica alumina material

[0039] The silica fume and the aluminum fume are weighed according to the mass ratio of the silica fume and the aluminum fume 15:100, mixed, and milled at a high speed for 15 minutes under the condition of a rotating speed of 2500 rpm to obtain an activated silicon doped aluminum fume. Dissolve ammonium bicarbonate in water to prepare a 6M ammonium bicarbonate aqueous solution. Weigh ammonium bicarbonate aqueous solution and activated silicon aluminum-doped ash according to the liquid-to-solid ratio of 3:1 mL / mg, mix them, stir at 150 rpm, and perform low-temperature plasma irradiation for 2 hours. The applied voltages of low-temperature plasma irradiation are respectively For 5KV, 7KV, 9KV, 10KV, 30KV, 50KV, 51KV, 53KV, 55KV, the working atmosphere is oxygen, and nine groups of silicon-alum...

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Abstract

The invention discloses a method for preparing a sintering-free high-stability mesoporous silica-aluminum material from silica fume and aluminum ash and a product. The method comprises the following steps: weighing silica fume and aluminum ash, mixing, and grinding at a high speed of 500-2500 rpm for 5-15 minutes to obtain activated silicon-doped aluminum ash; respectively weighing an ammonium bicarbonate water solution and activated silicon-doped aluminum ash, mixing, stirring at a rotating speed of 30-150 rpm, at the same time, carrying out low-temperature plasma irradiation for 1-2 hours toobtain silicon-doped aluminum slurry; and drying and cooling the silicon-doped aluminum slurry to obtain the sintering-free high-stability mesoporous silica-aluminum material. The maximum values of the pore diameter, the pore volume and the specific surface area of the prepared mesoporous silica-aluminum material is 13.3 nm, 0.65 cm<3>/g and 512 m<2>/g respectively, and the pore diameter change rate, the pore volume change rate and the specific surface area change rate of the mesoporous silica-aluminum material pretreated at 900 DEG C for 1 hour are all lower than 4%.

Description

technical field [0001] The invention relates to the field of research and development of material preparation methods, in particular to a method and product for preparing a sinter-free high-stability mesoporous silica-alumina material by using silica fume and aluminum fume. Background technique [0002] Mesoporous silica-alumina materials are currently widely used in many fields such as energy, chemical industry, and environmental protection due to their excellent physical and chemical properties. So far, scholars at home and abroad have done a lot of work on the synthesis of silica-alumina materials. Conventional preparation methods for mesoporous silica-alumina materials include soft template method, hard template method, and precipitation method. However, these three methods are difficult to control the hydrolysis-polymerization reaction of silicon and aluminum, and the pores of the prepared materials are easy to collapse during the high-temperature demoulding process. ...

Claims

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Application Information

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IPC IPC(8): C01B33/00C01B33/26
CPCC01B33/00C01B33/26
Inventor 黄涛徐娇娇刘万辉刘龙飞宋东平金俊勋周璐璐张树文
Owner 浙江慧科环保科技有限公司
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