Multi-site triazole ionic liquid capable of efficiently and reversibly absorbing ammonia gas

A technology of ionic liquids and triazoles, which is applied in gas treatment, separation method, dispersed particle separation, etc., to achieve the effect of simple synthesis process, convenient large-scale preparation and simple synthesis

Active Publication Date: 2021-12-03
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with cations such as imidazole, pyridine, and piperidine, triazolium cation has more hydrogen bond sites than them, and can form multi-site hydrogen bond interactions with NH3, which is beneficial to NH3 The efficient absorption of sub>3, but the proton-type ionic liquid with triazole as a cation has not been reported yet

Method used

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  • Multi-site triazole ionic liquid capable of efficiently and reversibly absorbing ammonia gas
  • Multi-site triazole ionic liquid capable of efficiently and reversibly absorbing ammonia gas
  • Multi-site triazole ionic liquid capable of efficiently and reversibly absorbing ammonia gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Dissolve 0.1mol of 1,2,4-triazole (6.907g) in 80mL of deionized water, and add the 1,2,4-triazole aqueous solution into a round-bottomed flask in an ice bath, Then, 0.2 mol (19.415 g) of 65% nitric acid solution was slowly added dropwise, and after the dropwise addition was completed, the reaction was stirred with magnetic force for 48 hours. After the reaction finishes, heating and rotating to remove residual nitric acid and water, and vacuum drying at 60°C to obtain [TrizH 2 ][NO 3 ] 2 .

[0016] 2) Dissolve 0.1mol of 1,2,4-triazole (6.907g) in 80mL of absolute ethanol, and add the 1,2,4-triazole absolute ethanol solution into a round bottom flask and place In an ice bath, 0.2 mol (30.14 g) trifluoromethanesulfonic acid was slowly added dropwise. After the dropwise addition was completed, the reaction was stirred by magnetic force for 48 hours. After the completion of the reaction, heat and rotate to remove residual trifluoromethanesulfonic acid and dehydrated ...

Embodiment 2

[0019] In the self-made absorption bottle that inner diameter is 2.00cm, add 3.00g embodiment 1 1) synthesized ionic liquid [TrizH 2 ][NO 3 ] 2 , and then into the NH 3 , the gas flow rate is 100ml / min, the temperature is 40°C, and the pressure is 0.10MPa. Weigh the absorption bottle at regular intervals until the mass does not change. 3 The absorption capacity is 0.287gNH 3 / gIL.

Embodiment 3

[0021] In the self-made absorption bottle that inner diameter is 2.00cm, add 3.00g embodiment 1 2) synthesized ionic liquid [TrizH 2 ][CF 3SO 3 ] 2 , and then into the NH 3 , the gas flow rate is 100ml / min, the temperature is 40°C, and the pressure is 0.10MPa. Weigh the absorption bottle at regular intervals until the mass does not change. 3 The absorption capacity is 0.233gNH 3 / gIL.

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Abstract

The invention relates to a novel multi-site triazole ionic liquid capable of efficiently and reversibly absorbing ammonia gas, belonging to the technical field of gas separation and purification. The ionic liquid is characterized in that the ionic liquid is proton type ionic liquid with triazole and derivatives thereof as cations, the cations contain a plurality of hydrogen bond donors capable of forming strong hydrogen bond interaction with NH3, efficient absorption of NH3 is achieved through the multi-site hydrogen bond interaction between the cations and NH3 molecules, NH3 can be desorbed out in a heating or pressure reduction mode, and a regenerated absorbent can be recycled and has stable absorption performance. The ionic liquid has the characteristics of simplicity in synthesis, high NH3 absorption amount, easiness in desorption, recyclability and the like, and has great application prospects in the aspect of NH3 purification and separation.

Description

technical field [0001] The invention belongs to the technical field of gas separation and purification, and specifically relates to a proton-type ionic liquid with triazole and its derivatives as cations. 3 A hydrogen bond donor that forms strong hydrogen bonds through cations with NH 3 Intermolecular multi-site hydrogen bonding for NH 3 Efficient capture and reversible separation. Background technique [0002] Ammonia (NH 3 ) is an important chemical raw material with a global annual output of more than 200 million tons. It is widely used in fertilizers, synthetic fibers, chemicals and other fields. Industrial ammonia emissions mainly come from synthetic ammonia, urea, cyanuric acid, inorganic chemicals (ammonium molybdate, Molybdenum oxide) and other production processes, as well as coke oven gas, ammonia refrigeration tank exhaust, nitric acid plant exhaust, etc. Studies have shown that ammonia emissions in the atmosphere are one of the main causes of smog, and the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D249/08B01D53/14
CPCC07D249/08B01D53/1493B01D53/14B01D2257/406B01D2252/30
Inventor 曾少娟孙雪琦张香平白璐李玥袁磊张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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