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Method for preparing monolithic catalysts using waste-based materials

A monolithic catalyst and base material technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as large amount of catalyst core components, industrial demand, and secondary pollution of catalysts. Achieve good catalytic effect, good mechanical strength and good catalytic activity

Active Publication Date: 2021-12-03
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3. The amplification effect is not obvious;
[0009] 1. When the impregnation method is used to prepare monolithic catalysts, the active components are easy to fall off and the loading rate is not high;
[0010] 2. When using the blending extrusion molding method to prepare monolithic catalysts, the consumption of catalyst core components is large and the economy is poor;
[0011] 3. In the catalyst molding process, it is necessary to calcine at a high temperature above 1100°C to improve the mechanical properties of the catalyst, which will lead to the deactivation of the active components in the catalyst and reduce the performance of the catalyst
[0012] Therefore, there is an urgent need to find a new technology to solve many problems in the production and use of transition metal catalysts, including the high cost of catalyst production and use, the secondary pollution of waste-based catalysts, and various aspects of catalyst molding. Whether the indicators can meet the needs of industry

Method used

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  • Method for preparing monolithic catalysts using waste-based materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, see figure 1 , a method for preparing monolithic catalysts using waste-based materials, using manganese slag, fly ash and plasma glass slag as raw materials for preparing monolithic catalysts, the steps are as follows:

[0040] Step 1: Activate the waste-based material, the specific activation method steps are as follows:

[0041] a. Prepare HNO with a concentration of 1mol / L 3 solution and a NaOH solution with a concentration of 1mol / L, for subsequent use; and take manganese slag, and pass through a 50-mesh sieve through crushing to obtain manganese slag waste-based powder, for subsequent use;

[0042] b. Get 3g of the manganese slag waste base powder prepared in the step a, add 25ml of HNO prepared in the step a 3 The solutions were mixed, and after stirring for 30 minutes, a certain amount of NaOH solution prepared in the step a was added, so that the pH of the solution was controlled at 8 to 8.5, and after stirring for 30 minutes, the solid was ce...

Embodiment 2

[0053] This embodiment is basically the same as Embodiment 1, especially in that:

[0054] In this embodiment, a method for preparing monolithic catalysts using waste-based materials, using manganese slag, fly ash and plasma glass slag as raw materials for preparing monolithic catalysts, the steps are as follows:

[0055] Step 1: Activate the waste-based material, the specific activation method steps are as follows:

[0056] a. This step is the same as in Embodiment 1;

[0057] b. Get 1g of the manganese slag waste base powder prepared in the step a, add 25ml of HNO prepared in the step a 3 The solutions were mixed, and after stirring for 30 minutes, a certain amount of NaOH solution prepared in the step a was added, so that the pH of the solution was controlled at 8.5 to 9, and after stirring for 30 minutes, the solid was collected by centrifugation and set aside;

[0058] c. Put the solid obtained in the step b into an oven at 100°C for 5 hours of drying treatment. After t...

Embodiment 3

[0068] This embodiment is basically the same as the previous embodiment, and the special features are:

[0069] In this embodiment, a method for preparing monolithic catalysts using waste-based materials, using waste-based materials as raw materials for preparing monolithic catalysts, the steps are as follows:

[0070] Step 1: Activate the waste-based material, the specific activation method steps are as follows:

[0071] a. This step is the same as in Embodiment 1;

[0072] b. get 3g of the blast furnace slag waste base powder prepared in said step a, the mass content of the blast furnace slag waste base material components used in the activation process is: the content of transition metal is 10%, SiO 2 35%, Al 2 o 3 12%, K 2 O is 0.8%, MgO is 0.5%; add 25ml of HNO prepared in step a 3 The solutions were mixed, and after stirring for 30 minutes, a certain amount of NaOH solution prepared in the step a was added, so that the pH of the solution was controlled at 8 to 8.5, ...

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Abstract

The invention provides a method of using waste-based materials to prepare monolithic catalysts. Waste-based materials are used as raw materials for preparing monolithic catalysts. The preparation process is mainly divided into two parts: activation and molding. The catalyst can be completed at no more than 200 ° C. After molding, the connection between substances in the catalyst is mainly ionic bond and covalent bond, supplemented by hydrogen bond and van der Waals force, and has good mechanical strength. The catalyst not only has a good catalytic effect on the surface, but also has good catalytic activity when the active components on the surface fall off, and the internal components are exposed, which not only increases the service life of the catalyst, but also compared with conventional catalysts, The use of the catalyst reduces catalyst replacement costs. The preparation method of the integral catalyst of the present invention is novel, simple, efficient, low in cost, long in catalyst service life, high in strength, good in activity and high in quality, can realize waste recycling, is environmentally friendly, and has significant popularization value.

Description

technical field [0001] The invention relates to a method for preparing an integral catalyst, and also relates to a method for recycling waste, which is applied in the technical field of catalyst preparation and application. Background technique [0002] A catalyst is a chemical reaction that can change the chemical reaction rate of the reactants without changing the chemical balance. The catalyst can both increase or decrease the chemical reaction rate of the reactants, and its quality and chemical properties have not changed before and after the chemical reaction. substance. According to statistics, more than 90% of industrial processes use catalysts, such as chemical, petrochemical, biochemical, and environmental protection. Catalysts play an extremely important role in the modern chemical industry. The activity, selectivity and stability of catalysts are important indicators to measure the performance of catalysts. Noble metal catalysts and transition metal catalysts are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J27/185B01J27/187B01J37/08
CPCB01J23/34B01J27/1853B01J27/187B01J37/08
Inventor 张佳王晶晶殷瑞夏青玲崔耀文周吉峙钱光人
Owner SHANGHAI UNIV