Catalyst and preparation method thereof

A technology of catalyst and complexing agent, applied in catalyst preparation and catalyst field, can solve the problems of low service life, uniform distribution of difficult-to-active components, high production cost, etc. performance effect

Pending Publication Date: 2020-08-04
金风环保有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Another catalyst preparation method is the co-impregnation method. During the drying process, due to the difference in the solubility of the two metal salts, it is difficult to form a uniform distribution of the active components on the surface of the carrier due to the influence of the surface tension of the solvent, and it is difficult to form a real catalyst. alloy solid solution
In addition, due to the non-uniformity of dispersion, high-temperature calcination easily leads to the migration and aggregation of active component particles to form excessively large grains, which affects the utilization rate of active components
[0006] Therefore, for the catalyst in the prior art, because the preparation process determines that it has a higher production cost and a lower service life, thereby increasing the cost of sewage treatment

Method used

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preparation example Construction

[0030] The preparation method of the catalyst according to the concept of the present invention includes the preparation step of the functionalized polymer / carrier precursor, the preparation step of the transition metal-rare earth-polymer complex / carrier precursor and the preparation step of the catalyst. Hereinafter, each step according to the inventive concept will be described in detail.

[0031] Preparation steps of functionalized polymer / carrier precursor

[0032] The preparation step of the functionalized macromolecule / carrier precursor may include: providing a carrier on which the organic macromolecule is loaded, and utilizing a complexing agent to functionalize the organic macromolecule on the carrier, thereby obtaining the functionalized macromolecule / carrier precursor ( Hereinafter, referred to as "first precursor").

[0033] Specifically, the step of preparing the first precursor according to an exemplary embodiment of the present invention may include a step of p...

Embodiment 1

[0060] A. Functionalization-PVC / Al 2 o 3 Precursor preparation:

[0061] Weigh a diameter of 4.5mm, a length of 4.5mm, and a specific surface area of ​​150m 2 / g, columnar α-Al with a pore volume of 0.3mL / g 2 o 3 Carrier 100 g. 12g of PVC (polyvinyl chloride) was completely dissolved in 1000mL of THF (tetrahydrofuran) to obtain an organic polymer solution, and then, 100g of columnar α-Al 2 o 3 Immerse the carrier into the organic polymer solution and let it stand for 1h to make PVC adsorb on the columnar α-Al 2 o 3 s surface. followed by drying to obtain PVC / Al 2 o 3 Precursor.

[0062] Then, 16.12 g of dicyandiamide was added to 1500 mL of deionized water to obtain an aqueous solution of dicyandiamide, after which PVC / Al was added to the aqueous solution of dicyandiamide 2 o 3 The precursor was refluxed for 4h, then cooled to 25°C and filtered, the filtrate was washed with deionized water until neutral, and dried for later use to obtain functionalized-PVC / Al 2 o...

Embodiment 2

[0070] A. Functionalization-SAN / Al 2 o 3 Precursor preparation:

[0071] Weigh the diameter of 3mm-5mm, specific surface area of ​​180m 2 / g, spherical γ-Al with a pore volume of 0.35mL / g 2 o 3 Carrier 100 g. 29.16g of SAN (the molar ratio of styrene monomer to acrylonitrile monomer is 1:1) was completely dissolved in 1500mL of DMF (dimethylformamide) to obtain an organic polymer solution, and then, 100g of spherical γ-Al 2 o 3 Immerse the carrier into the organic polymer solution and let it stand for 6 hours to make SAN adsorb on the spherical γ-Al 2 o 3 surface of the carrier, followed by drying to obtain SAN / Al 2 o 3 Precursor.

[0072] Then, 11.14 g of ethylenediamine was added to 1000 mL of deionized water to obtain an aqueous solution of ethylenediamine, after which SAN / Al was added to the aqueous solution of ethylenediamine 2 o 3 The precursor was refluxed for 1 h, then cooled to 25 °C and filtered, washed with deionized water until neutral, and dried for l...

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Abstract

The invention provides a catalyst and a preparation method thereof, and the method comprises the following steps: providing an organic polymer solution, and dipping a carrier into the organic polymersolution so that an organic polymer is loaded on the carrier; functionalizing the organic polymer loaded on the carrier by using a complexing agent to obtain a first precursor; preparing a transitionmetal-rare earth mixed solution, and soaking the first precursor in the mixed solution to obtain a second precursor; and drying and roasting the second precursor to obtain the catalyst. Through the concept, according to the invention, the organic polymer and the complexing agent are introduced, so that an organic polymer metal complex is formed in the preparation process of the catalyst; accordingto the preparation method, a part of transition metal ions are embedded into the crystal structure of the rare earth oxide in the roasting process to form a solid solution, so that the influence of the surface tension and solvation effect of the impregnation liquid on the dispersion of the active component is overcome, the dispersity of the active component on the carrier is improved, and the catalytic performance of the catalyst is improved.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a preparation method of a catalyst and a catalyst obtained therefrom. Background technique [0002] With the development of industry, the demand for the treatment of refractory industrial wastewater has become increasingly urgent. Refractory substances in industrial wastewater directly determine the up-to-standard discharge and stable operation of sewage treatment plants. Traditional biochemical treatment methods cannot remove toxic and harmful refractory substances in industrial wastewater. Therefore, advanced oxidation water treatment technology must be introduced. [0003] In the advanced oxidation water treatment technology, the ozone catalytic oxidation method belongs to an important branch, which is to oxidize small molecular acids, macromolecules, and organic substances that are difficult to biodegrade into low-toxic or non-toxic small molecular substances...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/08B01J37/02C02F1/72C02F1/78
CPCB01J37/0018B01J37/0203B01J23/83C02F1/725C02F1/78C02F2209/08
Inventor 裴延昭
Owner 金风环保有限公司
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