Renewable compound ionic liquid desulfurizing agent as well as preparation method and application thereof

A technology of ionic liquid and desulfurizing agent, which is applied in the field of compound ionic liquid desulfurizing agent and its preparation, can solve the problems of cumbersome preparation methods and high cost, and achieve the effects of good selectivity, low cost and significant environmental protection benefits

Active Publication Date: 2021-09-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN108325338A discloses a preparation method of an ionic liquid compounding agent for removing carbonyl sulfide. The preparation method of the ionic liquid desulfurization agent is too cumbersome and needs to be prepared from raw materials, and the cost is too high

Method used

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  • Renewable compound ionic liquid desulfurizing agent as well as preparation method and application thereof
  • Renewable compound ionic liquid desulfurizing agent as well as preparation method and application thereof
  • Renewable compound ionic liquid desulfurizing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Measure 100mL of absolute ethanol, then weigh 20g of N-methylpyrrolidone, 20g of 1-ethyl-3-methylimidazole trifluoromethanesulfonate, 20g of 1-ethyl-3-methyl Imidazole propionate, 20 g of monoethanolamine (MEA) and 20 g of diethanolamine (DEA). Add the weighed ionic liquid, alcohol amine solution and enhancer dropwise into the measured anhydrous ethanol at room temperature through a constant pressure dropping funnel, and stir for 30 minutes to obtain Compound Ionic Liquid Desulfurizer Example No. 1 product.

[0024] Take 10mL of the above product as the absorption liquid and put it in the reaction bottle. After the purified COS standard gas is dried by the drying tube, the COS content in it is monitored in real time by gas chromatography. During the test process, the COS content is detected every 10 minutes. When the COS content in the COS standard gas processed by the absorption liquid of the product No. 1 of Example 1 rises to 50% of the inlet concentration, it is re...

Embodiment 2

[0026] Measure 100mL of absolute ethanol, then weigh 30g of N-methylpyrrolidone, 20g of 1-ethyl-3-methylimidazole trifluoromethanesulfonate, 20g of 1-ethyl-3-methyl Imidazole propionate, 15 g of monoethanolamine (MEA) and 15 g of diethanolamine (DEA). Add the weighed ionic liquid, alcohol amine solution and enhancer dropwise into the measured anhydrous ethanol at room temperature through a constant pressure dropping funnel, and stir for 30 minutes to obtain compound ionic liquid desulfurizer Example 2 product.

[0027] Take 10mL of the above product as the absorption liquid and put it in the reaction bottle. After the purified COS standard gas is dried by the drying tube, the COS content in it is monitored in real time by gas chromatography. During the test process, the COS content is detected every 10 minutes. When the COS content in the COS standard gas processed by the absorption liquid of the product No. 2 of Example 2 rises to 50% of the inlet concentration, it is regard...

Embodiment 3

[0029] Measure 100mL of absolute ethanol, then weigh 30g of N-methylpyrrolidone, 15g of 1-ethyl-3-methylimidazole trifluoromethanesulfonate, 15g of 1-ethyl-3-methyl Imidazole propionate, 20 g of monoethanolamine (MEA) and 20 g of diethanolamine (DEA). Add the weighed ionic liquid, alcohol amine solution and enhancer dropwise into the measured anhydrous ethanol at room temperature through the constant pressure dropping funnel, and stir for 30 minutes to obtain the composite ionic liquid desulfurizer Example No. 3 product.

[0030] Take 10mL of the above product as the absorption liquid and put it in the reaction bottle. After the purified COS standard gas is dried by the drying tube, the COS content in it is monitored in real time by gas chromatography. During the test process, the COS content is detected every 10 minutes. When the COS content in the COS standard gas processed by the absorption solution of the product No. 3 of Example 3 rises to 50% of the inlet concentration,...

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Abstract

The invention discloses a regenerable compound ionic liquid desulfurizing agent and a preparation method and an application thereof. The regenerable compound ionic liquid desulfurizing agent is formed by mixing a desulfurization component and a diluting solvent, the desulfurization component is composed of, by mass, ionic liquid, an alcohol amine solution and an enhancer, and the mass fraction of the ionic liquid accounts for 25-40% of that of the desulfurization component; the alcohol amine solution accounts for 25-40% of the mass fraction of the desulfurization component, and the enhancer accounts for 20-50% of the mass fraction of the desulfurization component; the ionic liquid is at least two of 1-ethyl-3-methylimidazole trifluoromethanesulfonate, 1-ethyl-3-methylimidazole propionate, 1-ethyl-3-methylimidazole diamine nitrile, 1-ethyl-3-methylimidazole bis (trifluoromethanesulfonyl) imide, 1-ethyl-3-methylimidazole histidine, 1-ethyl-3-methylimidazole glycolate, and 1-methyl-3-sulfobutyl imidazole bisulfate. The desulfurizing agent has a good removal effect on organic sulfur such as carbonyl sulfide, carbon disulfide and mercaptan, the adsorbed organic sulfur is desorbed through heating after adsorption saturation, and the desulfurizing agent can be regenerated and reused for multiple times.

Description

technical field [0001] The invention relates to the technical field of desulfurization of coke oven gas, in particular to a reproducible compound ionic liquid desulfurizer and its preparation method and application. Background technique [0002] With the extensive exploitation, processing and use of fossil fuels, the global environmental pollution is becoming more and more serious. Countries around the world have formulated strict environmental protection regulations to limit the emission of SO into the atmosphere. 2 、H 2 S, COS and other sulfur-containing gases. [0003] Coke oven gas contains a variety of inorganic sulfur and organic sulfur and other harmful sulfides that need to be dealt with urgently. The inorganic sulfur includes hydrogen sulfide and sulfur dioxide, and the organic sulfur includes carbonyl sulfide, carbon disulfide and mercaptans. The existence of various sulfides, especially the presence of carbonyl sulfide will corrode equipment and pipelines, lead ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C10K1/00C10K1/10
CPCB01D53/1493B01D53/1456C10K1/004C10K1/10B01D2252/504B01D2252/30B01D2257/308
Inventor 王建国李岩峰谢亮孔祥宇张乐乐
Owner ZHEJIANG UNIV OF TECH
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