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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is relatively complicated and requires additional high-temperature oxidation dehydration to enhance the related properties of the prepared materials

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
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Influence of the mass ratio of silica fume and aluminum ash 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, weigh silica fume and aluminum respectively Ash, mixed, and ground at a high speed of 500 rpm for 5 minutes to obtain nine groups of activated silicon-doped aluminum ash. Dissolve ammonium bicarbonate in water to prepare a 2M aqueous solution of ammonium bicarbonate. Weigh the ammonium bicarbonate aqueous solution and the activated silicon-aluminum ash according to the liquid-solid ratio of 1:1mL / mg, mix them, stir at a speed of 30 rpm, and irradiate with low-temperature plasma for 1 hour to obtain nine groups of silicon-aluminum slurries , wherein the action voltage of low-temperature plasma irradiation is 10KV, and the action atmosphere is oxygen. N...

Embodiment 2

[0032] Example 2 Effect of Ammonium Bicarbonate Concentration on Pore Development and Stability of Prepared Sinter-free Mesoporous Alumina Silica Material

[0033]Weigh silica fume and aluminum dust according to the mass ratio of silica fume and aluminum dust of 10:100, mix them, and grind at a high speed of 1500 rpm for 10 minutes to obtain activated silicon-doped aluminum dust. Dissolve ammonium bicarbonate in water, prepare nine groups of ammonium bicarbonate aqueous solutions of 1M, 1.5M, 1.8M, 2M, 4M, 6M, 6.2M, 6.5M, and 7M, and weigh them according to the ratio of liquid to solid: 2:1mL / mg Ammonium bicarbonate aqueous solution and activated silicon-aluminum ash were mixed, stirred at a speed of 90 rpm, and simultaneously irradiated with low-temperature plasma for 1.5 hours to obtain nine groups of silicon-doped aluminum slurries, wherein the applied voltage of low-temperature plasma irradiation was 30KV, The working atmosphere is oxygen. Nine groups of silicon-doped alu...

Embodiment 3

[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] Weigh silica fume and aluminum dust according to the mass ratio of silica fume and aluminum dust of 15:100, mix them, and grind at a high speed of 2500 rpm for 15 minutes to obtain activated silicon-doped aluminum dust. Dissolve ammonium bicarbonate in water to prepare 6M aqueous ammonium bicarbonate solution. Weigh ammonium bicarbonate aqueous solution and activated silicon-doped aluminum ash according to the liquid-solid ratio of 3:1mL / mg, mix them, stir at a speed of 150rpm, and perform low-temperature plasma irradiation for 2 hours at the same time, wherein the action voltages of low-temperature plasma irradiation are respectively 5KV, 7KV, 9KV, 10KV, 30KV, 50KV, 51KV, 53KV, 55KV, the working atmosphere is oxygen, and nine groups of silicon-doped aluminum pastes are obtained. ...

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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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