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Arsenic removal agent and preparation method thereof

A technology for removing arsenic and active components, which is applied in chemical instruments and methods, molecular sieve catalysts, catalysts for physical/chemical processes, etc. The effect of adsorption accuracy and improvement of adsorption capacity

Pending Publication Date: 2021-12-24
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the arsenic removal accuracy and arsenic capacity of the prior art de-arsenic agents need to be further improved, thereby providing an arsenic-removing agent and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a kind of arsenic removal agent, and its preparation method is:

[0038] (1) 100g of macroporous alumina (pore volume 1.0mL / g, specific surface area 440m 3 / g), 20g NaY (silicon-aluminum ratio is 5) molecular sieves are fully mixed, after mixing evenly, add 6g of magnesium oxide, use a ball mill to mix until completely uniform and take out for use.

[0039] (2) Put a small amount of mixed material (10g) into the drum, spray 0.1% sodium bicarbonate solution to carry out rolling ball molding. By continuously adding the materials mixed in the first step and sodium bicarbonate solution, adjust the dryness and wetness, and roll the ball until it becomes a ball. Dry at 120°C for 2 hours. Calcined at 500° C. for 4 h to obtain the carrier.

[0040] (3) Dissolve 56g of lead acetate and 0.2g of silver nitrate in 70mL of water, heat the solution to 80°C to ensure that the materials are completely dissolved, and add 1g of hydrogen peroxide (concentration...

Embodiment 2

[0044] This embodiment provides a kind of arsenic removal agent, and its preparation method is:

[0045] (1) 100g of macroporous alumina (pore volume 1.0mL / g, specific surface area 440m 3 / g), 20g ZSM-5 molecular sieve (silicon-aluminum ratio 40) are mixed evenly, then add 6g of magnesium oxide, and use a ball mill to mix until it is completely uniform and take it out for use.

[0046] (2) Put a small amount of mixed material (10g) into the drum, spray 0.1% ammonia water to carry out rolling ball forming. By continuously feeding and adding 0.1% ammonia water to adjust the dryness and wetness, rolling ball molding is carried out until a ball is formed. Dry at 120°C for 2 hours. Calcined at 500° C. for 4 h to obtain the carrier.

[0047] (3) Dissolve 56g of lead acetate and 0.2g of silver nitrate in 70mL of water, heat the solution to 80°C to ensure that the materials are completely dissolved, and add 1g of hydrogen peroxide to promote oxidation.

[0048] (4) Add 100 g of the ...

Embodiment 3

[0051] This embodiment provides a kind of arsenic removal agent, and its preparation method is:

[0052] (1) 100g of macroporous alumina (pore volume 1.0mL / g, specific surface area 440m 3 / g), 20gNaY molecular sieve (silicon-aluminum ratio is 5) after mixing evenly, add 6g magnesium carbonate. Use a ball mill to mix until completely uniform and take out for use.

[0053] (2) Put a small amount of mixed material (10g) into the drum, spray 0.5% sodium hydroxide solution to carry out rolling ball molding. By continuously feeding and adding 0.5% sodium hydroxide solution to adjust the dryness and wetness, rolling ball molding is carried out until a ball is formed. Dry at 120°C for 2 hours. Calcined at 500° C. for 4 h to obtain the carrier.

[0054] (3) Dissolve 56g of lead acetate and 0.2g of silver nitrate in 70mL of water, heat the solution to 80°C to ensure that the materials are completely dissolved, and then add 1g of hydrogen peroxide. Promotes oxidation.

[0055] (4) ...

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Abstract

The invention belongs to the technical field of preparation of arsenic removal agents, and particularly relates to an arsenic removal agent and a preparation method thereof. The method comprises the following steps of uniformly mixing macroporous alumina, a molecular sieve and a magnesium-containing compound, molding with an alkaline solution, drying, and roasting to obtain a carrier, dissolving a lead-containing compound and a silver-containing compound in water, and adding an oxidizing agent to obtain impregnation liquid, and adding a carrier into the impregnation liquid, conducting impregnation, drying and roasting to obtain the arsenic removal agent. According to the method, an alkaline solution is used for sample forming, an alkaline active center is provided, a good coordination effect is achieved, and the prepared arsenic removal agent is more uniform in pore channel and higher in synergistic effect; and the oxidant is added, so that the valence state of the active component metal can be improved, the redox reaction is promoted, and the arsenic removal precision is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of arsenic removal agent, and in particular relates to an arsenic removal agent and a preparation method thereof. Background technique [0002] Arsenide is a deadly catalyst poison. Many catalysts used in industry are very sensitive to arsenide. Hundreds of ppb or even a few ppb of arsenide can deactivate the catalyst, and the higher the arsenide concentration, the more deactivation quick. [0003] Arsenic compounds are widely found in petroleum, coal and other chemical raw materials. In the process of petroleum refining and processing, arsenic compounds also enter the processing fractions of naphtha, diesel oil, gasoline, ethylene, propylene and so on according to the different processing techniques. When these fractions are further processed, the arsenic compounds tend to poison and deactivate the catalyst. For example, when naphtha is used as a reforming raw material, arsenic compounds c...

Claims

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Application Information

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IPC IPC(8): B01J29/10B01J29/44B01J35/10C10G45/04
CPCB01J29/126B01J29/44C10G45/04C10G2300/205B01J35/615
Inventor 刘聪迟莹单红飞李晓凡景云峰
Owner SHENYANG SANJUKAITE CATALYST
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