Sulfur dioxide gas collection medium

A sulfur dioxide, medium technology, applied in organic chemistry, chemical instruments and methods, dispersed particle separation, etc., to achieve the effect of reducing cost, avoiding secondary pollution, high selection and absorption efficiency

Inactive Publication Date: 2014-03-19
宁波赛茵特科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through relevant patent searches, no ionic liquids with relevant structures have been used for the absorption of sulfur dioxide

Method used

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  • Sulfur dioxide gas collection medium
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0022] Example 1-6

[0023] Under the condition of 20°C, according to the above experimental procedure, the absorption experiment was carried out under different sulfur dioxide partial pressure conditions, and the results are as follows:

[0024]

[0025]

[0026] Since the adsorption process of sulfur dioxide in the ionic liquid will release heat, increasing the temperature is not conducive to the absorption of sulfur dioxide, and the suitable absorption temperature is 20°C.

[0027] Example 13-18

[0028] According to the above experimental conditions, we investigated the repeated regeneration ability, and conducted a desorption experiment on the ionic liquid that has been saturated (partial pressure 0.1MPa) by passing nitrogen gas for 30 minutes. The experimental results are as follows:

[0029]

[0030]

[0031] Note: The residual amount of sulfur dioxide refers to the ratio of the mass of sulfur dioxide adsorbed by the ionic liquid to the amount of the ionic ...

Embodiment 19～28

[0033] We investigated the performance of the repeated use of the medium, and repeated the adsorption experiment with the saturated medium at 20°C and a partial pressure of 0.1MPa according to the above experimental procedures. The experimental results are as follows:

[0034]

[0035] From the above experimental results, it can be seen that the present invention has good reusability, and the absorption performance does not decrease significantly after being reusable 10 times, which has the prospect of industrialization.

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Abstract

The invention relates to a sulfur dioxide gas collection medium, The invention is characterized in that the sulfur dioxide gas collection medium is an ionic liquid composed of anions and cations in a mol ratio of 1:1, wherein the cation structure is disclosed in the specification, wherein R1, R2=H, and R3=-CH3; and the anions are disclosed in the specification. By using the ionic liquid without obvious saturated vapor pressure, after the ionic liquid achieves an adsorption saturation state, the ionic liquid can be regenerated and recycled by simple heating, thereby avoiding the problem of secondary pollution caused by use of the traditional absorbent.

Description

technical field [0001] The invention relates to a sulfur dioxide gas collection medium, which absorbs sulfur dioxide waste gas with high efficiency and high selectivity, and achieves the purpose of purifying the gas. Background technique [0002] Acid gases such as sulfur dioxide are the main pollutants in the atmosphere, especially sulfur dioxide, which is already one of the main culprits of PM2.5. In recent years, although my country has adopted emission reduction policies, the average annual acid gas emissions in my country still exceed 30 million tons, surpassing the United States to become the world's number one, causing destructive effects on the natural environment we depend on for survival. At present, the mature method for the removal of acid waste gas, which can be applied on a large scale, is mainly to use alkaline absorbents or adsorbents and convert them into more stable compounds. Common absorption methods include limestone-gypsum method, acid method, magnesiu...

Claims

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Application Information

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IPC IPC(8): B01D53/14C07D473/34
Inventor 和吉
Owner 宁波赛茵特科技服务有限公司
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