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Preparation method of normal-temperature desulfurizing agent

A desulfurization agent, normal temperature technology, applied in the field of preparation of normal temperature desulfurization agent, can solve the problems of complex preparation process of microwave synthesis method, unfavorable industrial scale-up production, unsuitable for industrial tail gas desulfurization and purification treatment at normal temperature, and achieves easy operation and improved diffusion , the effect of simple preparation method

Pending Publication Date: 2022-01-11
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent publication number is CN106867593B, which discloses a method for preparing a Zn-Al hydrotalcite-based medium-temperature gas desulfurizer; the preparation process of the desulfurizer is to first synthesize the Zn-Al hydrotalcite precursor with a mixed salt solution microwave, and then Then obtain Zn-Al hydrotalcite by microwave hydrothermal crystallization reaction, dry and calcinate to obtain desulfurization active component Zn-Al composite oxide, then add volcanic rock particles for molding and roasting; the preparation process of microwave synthesis method is relatively complicated, which is not conducive to Industrial scale-up production
In addition, this desulfurizer is mainly used in the field of medium and high temperature gas purification, and the temperature required for desulfurization is 400-600°C, which is not suitable for normal temperature desulfurization and purification of industrial tail gas

Method used

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  • Preparation method of normal-temperature desulfurizing agent
  • Preparation method of normal-temperature desulfurizing agent
  • Preparation method of normal-temperature desulfurizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A normal temperature desulfurizer, made of NiZn 2 The Al-LDH precursor was obtained after calcination at 350 °C for 12 h, in which Ni 2+ and Zn 2+ The molar ratio is 1:2, (Ni 2+ +Zn 2+ ) and Al 3+ The molar ratio is 3:1.

[0029] The preparation method of above-mentioned a kind of normal temperature desulfurizer, its specific preparation steps are as follows:

[0030] (1) Dissolve 0.6 mmol of nickel nitrate, 1.2 mmol of zinc nitrate and 0.6 mmol of aluminum nitrate in 30 mL of deionized water to obtain Ni 2+ The concentration is 20 mmol / L, Zn 2+ The concentration is 40 mmol / L, Al 3+ Solution A with a concentration of 20 mmol / L;

[0031] (2) Dissolve 15 mmol of precipitant urea in 40 mL of deionized water to obtain solution B with a precipitant concentration of 0.375 mol / L;

[0032] (3) Mix solution A and solution B obtained in step (1) and step (2), then place the mixture of A and B in a hydrothermal kettle for reaction, and conduct a hydrothermal reaction at 1...

Embodiment 2

[0035] A normal temperature desulfurizer, made of Ni 1.5 Zn 1.5 The Al-LDH precursor was obtained after calcination at 350 °C for 12 h, in which Ni 2+ and Zn 2+ The molar ratio is 1:1, (Ni 2+ +Zn 2+ ) and Al 3+ The molar ratio is 3:1.

[0036] The preparation steps of the above-mentioned normal temperature desulfurizer refer to Example 1, the only difference is that in step (1), 0.9 mmol of nickel nitrate and 0.9 mmol of zinc nitrate, Ni 2+ and Zn 2+ The molar ratio is 1:1, and the prepared desulfurizer is denoted as room temperature desulfurizer 2.

Embodiment 3

[0038] A normal temperature desulfurizer, made of Ni 1 Zn 3 The Al-LDH precursor was obtained after calcination at 500 °C for 10 h, in which Ni 2+ and Zn 2 + The molar ratio is 1:3, (Ni 2+ +Zn 2+ ) and Al 3+ The molar ratio is 4:1.

[0039] The preparation steps of the above-mentioned normal temperature desulfurizer refer to Example 1, the only difference is that 0.45 mmol of nickel chloride, 1.35 mmol of zinc sulfate and 0.45 mmol of aluminum nitrate are used in step (1), and 20 mmol of aluminum nitrate are used in step (2). Hexamethylenetetramine, the precipitant concentration is 0.5 mol / L, the reaction temperature in step (3) is 130°C, and the desulfurizer is calcined at 500°C for 10h in step (4), the prepared desulfurizer is denoted as normal temperature desulfurizer 3.

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Abstract

The invention relates to a preparation method of a normal-temperature desulfurizing agent, which is characterized by comprising the following steps of: (1) dissolving soluble nickel salt, zinc salt and aluminum salt in deionized water according to the molar ratio of Ni < 2 + > to Zn < 2 + > of 1: (1-6): 1 and the molar ratio of (Ni < 2 + > + Zn < 2 + >) to Al < 3 + > of 2: 1-4: 1, stirring and dissolving to obtain a solution A; (2) dissolving a precipitator in deionized water to obtain a solution B with the concentration of 0.1-0.5 mol/L; (3) mixing the solution A and the solution B according to the volume ratio of 5: 1 to 2: 1, and then putting the mixed solution of the solution A and the solution B into a hydrothermal kettle to react for 8-24 hours at the temperature of 80-150 DEG C to obtain a crude product; and (4) suction-filtering, washing, drying and calcining the crude product. The preparation method has the advantages that the preparation method is simple, easy to operate and easy for industrial large-scale production; and as the hexagonal sheet of the normal-temperature desulfurizing agent contains rich mesoporous structures, high catalytic performance can be achieved at 10-100 DEG C.

Description

technical field [0001] The invention belongs to the field of preparation of environment-friendly materials and relates to a preparation method of a normal temperature desulfurizer. Background technique [0002] At present, a certain amount of H 2 Exhaust gas of S gas. due to H 2 S gas is highly toxic and corrosive, which not only corrodes equipment, but also seriously pollutes the air and endangers human health. Therefore, containing H 2 The tail gas of S gas must undergo strict desulfurization and purification treatment before it can be discharged. [0003] Due to the advantages of high desulfurization efficiency, convenient operation, and less solid waste, dry desulfurization has gradually occupied most of the market in the desulfurization industry. The most important thing in dry desulfurization is the research and development and preparation of desulfurizers. The performance of desulfurizers determines the final desulfurization efficiency. [0004] The patent publi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01D53/86B01D53/52
CPCB01J23/002B01J23/80B01D53/8612B01J2523/00B01J2523/27B01J2523/31B01J2523/847
Inventor 王贵祥陆彬陈卓周可可
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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