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Method for preparing cordierite porous ceramic material by using waste catalyst

A technology for waste catalysts and porous ceramics, which is applied in the field of solid waste resource utilization, can solve problems such as the difficulty of treatment of industrial waste catalysts, and achieve the effects of improving sintering, reducing thermal expansion coefficient and improving thermal shock resistance.

Active Publication Date: 2019-08-16
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of difficult treatment of industrial waste catalysts in the prior art, the purpose of the present invention is to provide a method for preparing high-purity cordierite porous ceramic materials by synergistically treating two waste solid catalysts, molecular sieve catalyst and hydrotalcite catalyst

Method used

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  • Method for preparing cordierite porous ceramic material by using waste catalyst
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  • Method for preparing cordierite porous ceramic material by using waste catalyst

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Embodiment 1

[0045] A method for preparing a cordierite porous ceramic material by using waste catalysts, the raw material components and parts by weight are: 60 parts of waste molecular sieve catalysts; 40 parts of waste hydrotalcite catalysts.

[0046] The above synthetic method for preparing the cordierite porous ceramic material by using the waste catalyst, the specific steps are as follows:

[0047] (1) According to the composition of the raw material formula, the raw material is crushed, dried at 80°C for 12 hours, and wet ball milled for 4 hours to obtain a slurry, wherein raw material: ball: water = 1:1.5:1;

[0048] (2) The slurry is filtered, aged for 24 hours, dried at 80°C for 12 hours, ground and passed through a 120-mesh sieve to obtain a powder;

[0049] (3) After the powder is uniformly mixed with 5% polyvinyl alcohol binder, it is molded under 20MPa pressure, and dried at 80°C for 12 hours to obtain a molded embryo;

[0050] (4) Place the embryo body in a high-temperature...

Embodiment 2

[0052] A method for preparing a cordierite porous ceramic material by using waste catalysts, the raw material components and parts by weight are: 60 parts of waste molecular sieve catalysts; 40 parts of waste hydrotalcite catalysts.

[0053] The above synthetic method for preparing the cordierite porous ceramic material by using the waste catalyst, the specific steps are as follows:

[0054] (1) Pre-burn raw materials, put the waste catalyst into a high-temperature furnace to raise the temperature to 700 °C at a rate of 100 °C / h, keep it warm for 2 hours, and then drop it to room temperature at a rate of -150 °C / h to obtain pre-calcined raw materials .

[0055] (2) According to the composition of the raw material formula, the raw material is crushed, dried at 80°C for 12 hours, and wet ball milled for 4 hours to obtain a slurry, wherein raw material: ball: water = 1:1.5:1;

[0056] (3) The slurry is filtered, aged for 24 hours, dried at 80°C for 12 hours, ground and passed th...

Embodiment 3

[0060] A method for preparing a cordierite porous ceramic material by using waste catalysts. The raw material components and parts by weight are as follows: 60 parts of waste molecular sieve catalysts; 40 parts of original hydrotalcite catalysts modified without adding zirconia.

[0061] The above synthetic method for preparing the cordierite porous ceramic material by using the waste catalyst, the specific steps are as follows:

[0062] (1) According to the composition of the raw material formula, the raw material is crushed, dried at 80°C for 12 hours, and wet ball milled for 4 hours to obtain a slurry, wherein raw material: ball: water = 1:1.5:1;

[0063] (2) The slurry is filtered, aged for 24 hours, dried at 80°C for 12 hours, ground and passed through a 120-mesh sieve to obtain a powder;

[0064] (3) After the powder is uniformly mixed with 5% polyvinyl alcohol binder, it is molded under 20MPa pressure, and dried at 80°C for 12 hours to obtain a molded embryo;

[0065] ...

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Abstract

The invention discloses a method for preparing a cordierite porous ceramic material by using a waste catalyst. The method utilizes an industrial deactivated waste molecular sieve catalyst and a hydrotalcite catalyst as raw materials, and adopts a solid phase synthesis method to prepare the cordierite porous ceramic material with relatively high strength and high purity. The method can make the maximum use of components in the waste catalysts, the high-purity cordierite porous ceramic material can be synthesized, the pore structure of the cordierite porous ceramic material can be further enriched, the porosity is increased, the firing temperature is reduced, and the dual purposes of environmental protection and industrial waste recycling are achieved.

Description

technical field [0001] The present invention relates to a method for preparing a cordierite porous ceramic material, in particular to a method for preparing a high-purity cordierite porous ceramic material by using waste molecular sieve catalysts and waste hydrotalcite catalysts for collaborative processing, which belongs to the utilization of solid waste resources field. Background technique [0002] With the continuous development of the social economy and the continuous progress of the chemical industry, catalysts are one of the core processes and play a pivotal role in the fields of chemical, petrochemical, biochemical, and environmental protection. In the context of the rapid increase in the level of industrialization, the consumption of industrial catalysts has also shown a blowout growth. During the catalytic cracking process, the performance of the catalyst is reduced or even deactivated due to material wear, heavy metal deposition and carbon deposition. And this k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/64C04B35/622C04B35/195
CPCC04B35/195C04B35/62204C04B35/64C04B38/068
Inventor 李灏阳李立清周柯王新伟
Owner CENT SOUTH UNIV
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