Ether-based guanidine salt ionic liquid for absorbing SO2 gas, preparation method and applications thereof

An ionic liquid and guanidine salt technology, applied in the field of SO2 gas absorption, can solve problems such as difficult treatment requirements, inability to utilize sulfur resources, and difficult to treat solid waste, and achieve the effects of low cost, excellent chemical stability, and easy desorption.

Active Publication Date: 2020-05-19
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the calcium treatment technology widely used in industrial flue gas desulfurization not only cannot utilize sulfur as a resource, but also produces a large amount of solid waste that is difficult to handle, which is increasingly difficult to meet people's treatment requirements

Method used

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  • Ether-based guanidine salt ionic liquid for absorbing SO2 gas, preparation method and applications thereof
  • Ether-based guanidine salt ionic liquid for absorbing SO2 gas, preparation method and applications thereof
  • Ether-based guanidine salt ionic liquid for absorbing SO2 gas, preparation method and applications thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0037] This embodiment also relates to the preparation of the above-mentioned ether-based guanidine salt ionic liquid, and the overall design of the preparation method includes the following steps:

[0038]Step a: Add polyethylene glycol monomethyl ether and potassium carbonate powder to the solution in turn, stir until completely dissolved, place the mixture in an ice-water bath, gradually add p-toluenesulfonyl chloride and continue to stir rapidly during the addition process, then add KOH reacted, then stopped after stirring for 0.5-2h, and a light yellow viscous substance was obtained. Wherein, in this step a, the molar ratio of polyethylene glycol monomethyl ether to p-toluenesulfonyl chloride is (0.5-1):1.

[0039] Step b: Add distilled water to the light yellow viscous substance obtained in step a, and stir until completely dissolved, then add ethyl acetate to extract 3 to 5 times, collect the organic phase, and then wash the organic phase with distilled water 3 to 5 tim...

preparation example 1

[0055] Add 17.5g of polyethylene glycol monomethyl ether and 10g of potassium carbonate powder to 10mL of water in turn, stir with a magnetic device until basically dissolved, then place the mixture in an ice-water bath, gradually add 14.30g of p-toluenesulfonyl chloride, and add p-toluenesulfonyl chloride During the process of continuous rapid stirring, 14g KOH was added, a large amount of heat was released during the reaction, and then the magnetic stirring was stopped after 1h to obtain a light yellow viscous substance.

[0056] Add 300mL of distilled water to the above light yellow viscous product, stir it with a glass rod until it is completely dissolved, then add 50mL of ethyl acetate to extract 3 times, collect the organic phase, wash the organic phase 3 times with distilled water, and then use anhydrous sodium sulfate for extraction. After drying, the ethyl acetate was removed by rotary evaporation to obtain the intermediate MPEG-PTS.

[0057] At 40°C, the above-mentio...

preparation example 2

[0062] Add 17.5g of polyethylene glycol monomethyl ether and 10g of potassium carbonate powder to 10mL of water in turn, stir with a magnetic device until basically dissolved, then place the mixture in an ice-water bath, gradually add 14.30g of p-toluenesulfonyl chloride, and add p-toluenesulfonyl chloride During the process of continuous rapid stirring, 14g KOH was added, a large amount of heat was released during the reaction, and then the magnetic stirring was stopped after 1h to obtain a light yellow viscous substance.

[0063] Add 300mL of distilled water to the above light yellow viscous product, stir it with a glass rod until it is completely dissolved, then add 50mL of ethyl acetate to extract 3 times, collect the organic phase, wash the organic phase 3 times with distilled water, and then use anhydrous sodium sulfate for extraction. After drying, the ethyl acetate was removed by rotary evaporation to obtain the intermediate MPEG-PTS.

[0064] At 40°C, the above-mentio...

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Abstract

The invention provides an ether-based guanidine salt ionic liquid for absorbing SO2 gas, a preparation method and applications thereof, wherein the cation of the ionic liquid is 1,1,3,3-tetramethylguanidine methoxypolyethylene glycol, and the anion of the ionic liquid is Br<->, Cl<-> or polyethylene glycol dicarboxylate ions. The ionic liquid disclosed by the invention has the advantages of high SO2 absorption rate, good regeneration performance and easiness in industrial application, and the preparation method of the ionic liquid is simple.

Description

technical field [0001] The present invention relates to SO 2 The technical field of gas absorption, in particular to a method for absorbing SO 2 The ether group guanidine salt ionic liquid of gas, simultaneously, the present invention also relates to the preparation method that has this ionic liquid, and its SO 2 Applications in gas absorption. Background technique [0002] With the development of industry, my country's air pollution is becoming more and more serious, among which sulfur dioxide (SO 2 ) is particularly harmful, SO 2 Compatible with O in air 2 Combines with water to form H 2 SO 4 , Acid rain is formed with rainwater, which will not only corrode buildings and cause soil deterioration, but also SO 2 It can cause respiratory diseases, which makes people pay more and more attention to the removal and recovery of SO 2 technical means. [0003] At present, the calcium method treatment technology widely used in industrial flue gas desulfurization not only ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/334C08G65/333C08G65/323C08G65/332C07C279/08C07C59/125C07C69/96C07C277/08C07C51/41C07C68/06B01D53/14
CPCC08G65/33306C08G65/3344C08G65/323C08G65/3322C07C279/08C07C59/125C07C69/96B01D53/1481B01D53/1493B01D2252/30
Inventor 姜海超崔钊康雅平韩泽华
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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