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A kind of preparation method of modified ionic liquid catalyst for removing sulfur dioxide

A technology for modifying ions and sulfur dioxide, applied in physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve problems such as precipitation of sulfur, sulfur process methods that have not been reported or have not been solved, and can achieve increased The effect of absorption, promotion of gas-liquid mass transfer ability, and easy recycling

Active Publication Date: 2020-02-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the desulfurization process of alcohol amine ionic liquid, the problem of sulfur precipitation has not been solved
[0004] At present, regarding the use of modified ionic liquid catalysts to remove SO 2 And the processing method of generating sulfur has not been seen in the report

Method used

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  • A kind of preparation method of modified ionic liquid catalyst for removing sulfur dioxide
  • A kind of preparation method of modified ionic liquid catalyst for removing sulfur dioxide
  • A kind of preparation method of modified ionic liquid catalyst for removing sulfur dioxide

Examples

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Effect test

Embodiment 1

[0037]Embodiment 1: A kind of preparation method of the modified ionic liquid catalyst that is used to remove sulfur dioxide, concrete steps are:

[0038] (1) Add citric acid to deionized water under stirring conditions at a temperature of 60°C to prepare a citric acid solution, wherein the mass concentration of citric acid in the citric acid solution is 40%;

[0039] (2) At a temperature of 80°C, add alcohol amine to the citric acid solution obtained in step (1) and stir evenly to obtain ionic liquid A, wherein the mass ratio of alcohol amine to citric acid is 1.5:1;

[0040] (3) Under the condition of stirring at a temperature of 60°C and a rotation speed of 500r / min, take three parts of the same mass of step (2) Ionic liquid A in different beakers, add water to dilute to obtain ionic liquid B, and the amount of water in ionic liquid B is The mass fractions are 40%, 60%, and 80%, that is, the cation contents in the ionic liquid are 60%, 40%, and 20%, respectively. ;

[004...

Embodiment 2

[0042] Embodiment 2: A kind of preparation method of the modified ionic liquid catalyst that is used to remove sulfur dioxide, concrete steps are:

[0043] (1) Add citric acid to deionized water under stirring conditions at a temperature of 60°C to prepare a citric acid solution, wherein the mass concentration of citric acid in the citric acid solution is 40%;

[0044] (2) At a temperature of 80°C, add alcohol amine to the citric acid solution obtained in step (1) and stir evenly to obtain ionic liquid A, wherein the mass ratio of alcohol amine to citric acid is 1.5:1;

[0045] (3) Under the condition of stirring at a temperature of 40°C, add water to dilute the ionic liquid A in step (2) to obtain an ionic liquid B, wherein the mass fraction of water in the ionic liquid B is 40%;

[0046] (4) Under stirring conditions, add ammonia water dropwise to the ionic liquid B obtained in step (3) to adjust the pH value of the ionic liquid to 7.5;

[0047] (5) Add iron salt (iron salt...

Embodiment 3

[0050] Embodiment 3: a kind of preparation method for the modified ionic liquid catalyst of removing sulfur dioxide, concrete steps are:

[0051] (1) Add citric acid to deionized water under stirring conditions at a temperature of 80°C to prepare a citric acid solution, wherein the mass concentration of citric acid in the citric acid solution is 40%;

[0052] (2) At a temperature of 40°C, add alcohol amine to the citric acid solution obtained in step (1) and stir evenly to obtain ionic liquid A, wherein the mass ratio of alcohol amine to citric acid is 2:1;

[0053] (3) Under the condition of stirring at a temperature of 60°C, add water to dilute the ionic liquid A in step (2) to obtain an ionic liquid B, wherein the mass fraction of water in the ionic liquid B is 60%;

[0054] (4) Under stirring conditions, take three parts of the same volume of ionic liquid B obtained in step (3) in three beakers, and add ammonia water drop by drop to adjust the pH value of the ionic liquid ...

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Abstract

The invention relates to a preparation method of modified ion liquid catalyst for removing sulfur dioxide, and belongs to the technical field of catalyst. The preparation method includes steps of adding citric acid in the deionized water under the condition of stirring at 40-80 DEG C and then preparing to be citric acid solution; adding alkylol amine in the citric acid at 40-80 DEG C and stirringevenly to obtain ion liquid A; adding water to the ion liquid A under the condition of stirring at 40-80 DEG C and diluting to obtain ion liquid B, wherein the mass percent of water in the ion liquidB is 40-60%; under the stirring condition, dropwise adding ammonium hydroxide in the ion liquid B to adjust the pH value of the ion liquid to be 7.2-9.0; adding ferric salt to the ion liquid and performing modified reaction for 1-3 hours under the stirring condition to obtain the modified ion liquid; adding manganese salt and / or nickel salt in the modified ion liquid, and performing modified reaction for 1-3 hours under the stirring condition, so as to obtain the modified ion liquid catalyst. The catalyst has good absorbing and desorbing abilities to SO2 gas, and can prevent sulphur generationand avoid equipment blockage.

Description

technical field [0001] The invention relates to a preparation method of a modified ionic liquid catalyst for removing sulfur dioxide, belonging to the technical field of catalysts. Background technique [0002] In the wet desulfurization process, it will inevitably be produced in the desulfurization liquid phase (NH 3 ) 2 S 2 o 3 , NH 4 Inorganic salts such as CNS, these salts accumulate in the desulfurization liquid. When the salt content is high, the desulfurization capacity of the process will drop sharply, thereby reducing the production capacity of the entire desulfurization process. In order to ensure the normal operation of the desulfurization process, excess salt must be excluded from the desulfurization system. These salty desulfurization waste liquids also pose a great threat to the environment. At present, there is still no good treatment method for the sulfur-containing waste liquid produced by the ionic liquid desulfurization process, which has become the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/32B01D53/86B01D53/50
CPCB01D53/8609B01J31/0285B01J31/32
Inventor 李凯乔雨腾王驰宁平孙鑫汤立红宋辛
Owner KUNMING UNIV OF SCI & TECH
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