Polyol-choline eutectic solvent used to absorb SO2 and NO2 and preparation method thereof

A technology of deep eutectic solvents and polyols, applied in chemical instruments and methods, separation methods, dispersion particle separation, etc., to achieve the effects of mild synthesis conditions, mild conditions, low melting point and viscosity

Pending Publication Date: 2019-05-03
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, choline deep eutectic solvents are rarely used as absorbents to absorb SO at the same time. 2 and NO 2 Research

Method used

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  • Polyol-choline eutectic solvent used to absorb SO2 and NO2 and preparation method thereof
  • Polyol-choline eutectic solvent used to absorb SO2 and NO2 and preparation method thereof
  • Polyol-choline eutectic solvent used to absorb SO2 and NO2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] for absorbing SO 2 and NO 2 The polyol-choline deep eutectic solvent is composed of hydrogen bond donor ethanol and hydrogen bond acceptor choline chloride, and the molar ratio of ethanol and choline chloride is 4:1.

[0027] The preparation method of ethanol-choline chloride deep eutectic solvent, takes by weighing 46.07g (1mol) ethanol and 53.14g (0.25mol) choline chloride, gets a three-necked flask, adds weighed choline chloride and Ethanol, stirred, put into an ultrasonic device, the temperature of the water bath is controlled at 45±2°C for 0.5h-1h, mixed evenly to form a colorless uniform transparent liquid; after the reaction is completed, put it into a vacuum drying oven and dry at 80°C for 10h. Obtain ethanol-choline chloride deep eutectic solvent. The sample has a viscosity of 13.60 mPa·s at 30°C and a melting point of -27.39°C.

[0028] Take the ethanol-choline chloride deep eutectic solvent and place it in the bubble column reactor. The temperature of the ...

Embodiment 2

[0032] for absorbing SO 2 and NO 2 The polyol-choline deep eutectic solvent is composed of hydrogen bond donor ethylene glycol and hydrogen bond acceptor choline chloride, and the molar ratio of ethylene glycol to choline chloride is 4:1.

[0033] The preparation method of ethylene glycol-choline chloride deep eutectic solvent, takes by weighing 62.07 (1mol) ethylene glycol and 53.14g (0.25mol) choline chloride, gets three-necked flask, adds the choline chloride of weighing in flask Alkali and ethylene glycol, stir, the solution temperature is controlled at 45±2°C and kept for 0.5h, mix evenly to form a colorless transparent clear liquid; after the reaction is completed, put it in a vacuum drying oven and dry at 80°C for 10h to obtain ethylene glycol - Choline chloride deep eutectic solvent. The sample has a viscosity of 21.75 mPa·s at 30°C and a melting point of -107.76°C.

[0034] Take the ethylene glycol-choline chloride deep eutectic solvent and place it in the bubble c...

Embodiment 3

[0038] for absorbing SO 2 and NO 2 The polyol-choline deep eutectic solvent is composed of hydrogen bond donor glycerol and hydrogen bond acceptor choline chloride, and the molar ratio of glycerol and choline chloride is 4:1.

[0039] The preparation method of glycerol-choline chloride deep eutectic solvent, takes by weighing 92.09g (1mol) glycerol and 53.14g (0.25mol) choline chloride, gets three-necked flask, adds weighing to flask in flask Add weighed choline chloride and glycerin to the solution, stir, and keep the temperature of the solution at 45±2°C for 0.5h, mix evenly to form a colorless, transparent and clear liquid; after the reaction, put it into a vacuum drying oven at 80°C Drying at low temperature for 10h to obtain glycerol-choline chloride deep eutectic solvent. The viscosity of this sample at 30°C is 277.5 mPa·s, and the glass transition temperature is -107.30°C.

[0040] Take the glycerol-choline chloride deep eutectic solvent and place it in the bubble co...

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Abstract

The invention relates to a polyol-choline eutectic solvent used to absorb SO2 and NO2, wherein the hydrogen bond acceptor is choline chloride, the hydrogen bond donor is polyol, and the molar ratio ofcholine chloride to polyol is 1:2 to 1:5. Compared with the prior art, the invention has the advantages that: 1) the solvent synthesis condition of the invention is mild and the process is simple; 2)that invention enables some materials to be transformed from a single solid phase to an inorganic liquid phase, thereby providing a new way for the preparation of a novel functional material; 3) thathydrogen bond can be formed between the hydrogen bond donor and the hydrogen bond acceptor, the distance between the anion and the cation is enlarged, and the lattice energy is reduced, thereby forming a low-melting-point eutectic solvent, and the melting point, the conductivity and the acid-base property of the synthesized eutectic solvent can be adjusted by changing different compositions and proportions of the two components; 4) the polyol-choline eutectic solvent prepared by the invention has lower melting point, lower viscosity and higher stability, and can be used as a novel solvent forflue gas purification and the like.

Description

technical field [0001] The invention relates to the preparation of a choline-based deep eutectic solvent of polyols with different hydroxyl numbers and its use in the technical field of air pollution control, and more specifically relates to a method for efficiently absorbing SO 2 and NO 2 Polyol-choline deep eutectic solvent and preparation method thereof. Background technique [0002] Ionic liquids have the characteristics of good solubility, wide liquid range, high chemical and thermal stability, and non-volatility, which make them widely used in the fields of organic synthesis, extraction, and chemical engineering. Especially in recent years, the use of ionic liquids as absorption solvents to absorb SO 2 , CO 2 、H 2 Gases such as S have become research hotspots at home and abroad. Although ionic liquids have attracted extensive attention of researchers, they also have certain limitations in the field of gas purification, such as unclear toxicity, complex synthesis p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/60B01D53/77
CPCY02A50/20
Inventor 窦金孝余江龙赵永奇段晓谞柴红宁张春霞李华
Owner UNIV OF SCI & TECH LIAONING
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