Anion functional ion liquid containing acylamino as well as preparation method and application thereof

An ionic liquid, amide group-containing technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as affecting industrial applications, insufficient capture capacity, poor cycle performance, etc., to avoid loss and volatilization. , the effect of increased capture and easy desorption

Active Publication Date: 2014-12-24
HENAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the current methods of capturing sulfur dioxide gas using anion-functionalized ionic liquids, there are generally problems such as insufficient capture capacity, high absorption enthalpy, difficult desorption, and poor cycle performance, which affect its industrial application.

Method used

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  • Anion functional ion liquid containing acylamino as well as preparation method and application thereof
  • Anion functional ion liquid containing acylamino as well as preparation method and application thereof
  • Anion functional ion liquid containing acylamino as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Different types of tetraalkylphosphine bromides or tetraalkylphosphine chlorides are selected respectively, and tetraalkylphosphine hydroxides are formed through anion exchange, and the formed tetraalkylphosphine hydroxides are mixed with different types of monoamide-containing compounds or The bisamide group-containing compound was reacted at room temperature and pressure for 6-24 hours according to a molar ratio of 1:1 to prepare different types of amide group-containing anion functionalized ionic liquids as shown in Table 1.

[0015] In a 5ml glass container with an inner diameter of 1cm, add 0.002mol of the different types of amide-containing anion functionalized ionic liquids prepared above, and then slowly introduce sulfur dioxide gas with a flow rate of 60ml / min and a trapped gas pressure of 0.1MPa , the temperature was controlled at 20°C, and the capture process was carried out at two different capture times of 0.5h and 1h respectively. During the capture process...

Embodiment 2

[0020] Add 0.002mol of tetradecyltrihexylphosphine diacetamide to a 5ml glass container with an inner diameter of 1cm, and then slowly introduce sulfur dioxide gas with a flow rate of 60ml / min, and set different trapping temperatures, trapping gas pressures and The capture time is to capture the sulfur dioxide gas. During the capture process, the electronic analytical balance is used for weighing. The capture results of the sulfur dioxide gas are shown in Table 2.

[0021] Compared with Table 1, combined with Table 2, it can be seen that the capture amount of sulfur dioxide gas will change significantly depending on the capture temperature and capture gas pressure. The higher the capture temperature or the lower the capture gas pressure, the The lower the amount of sulfur dioxide gas trapped by the anion functionalized ionic liquid containing amide group, the lower the trapping temperature or the higher the gas pressure, the higher the amount of sulfur dioxide gas trapped by th...

Embodiment 3

[0025] Use an electronic analytical balance to weigh different types of anion functionalized ionic liquids containing amide groups that have captured sulfur dioxide gas and add them to a 5ml glass container with an inner diameter of 1cm, then slowly feed nitrogen gas with a flow rate of 60ml / min and a pressure of 0.1 MPa, control different desorption temperature and desorption time, weigh with electronic analytical balance, get the desorption results shown in Table 3.

[0026] Table 3 Effects of different types of ionic liquids on the desorption of sulfur dioxide gas

[0027]

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Abstract

The invention discloses anion functional ion liquid containing acylamino as well as a preparation method and application thereof. According to the technical scheme, the anion functional ion liquid containing acylamino is characterized by taking a compound containing single acylamino or a compound containing double acylamino as anions and taking tetra-alkyl phosphine as cations. The invention further discloses the preparation method of the anion functional ion liquid and the application of the anion functional ion liquid to a sulfur dioxide gas capturing agent. According to the application, acylamino is introduced into the anions of the functional ion liquid and the capturing amount of sulfur dioxide gas is improved under the interaction of anion enhanced acylamino and the sulfur dioxide gas, and the desorption performance of the ion liquid is improved by virtue of an electron-withdrawing property of acylamino on the anions, so that the efficient and reversible capturing of the sulfur dioxide gas is carried out.

Description

technical field [0001] The invention relates to an ionic liquid capable of high capacity, low energy consumption and capable of cyclically capturing sulfur dioxide gas, in particular to an amide group-containing anion functionalized ionic liquid and its preparation method and application. Background technique [0002] In recent years, with the rapid development of economy and society, the sulfur dioxide released by coal combustion has continuously deteriorated the atmospheric environment, and the harm of acid rain has intensified, which has seriously affected human survival and the ecological environment. Therefore, there is an urgent need to control and reduce the emission of sulfur dioxide gas. Therefore, it is of great significance to develop efficient, reversible, economical and environmentally friendly new materials and new processes for capturing sulfur dioxide gas. [0003] At present, the use of traditional processes such as limestone, ammonia, and organic solvents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
Inventor 王键吉崔国凯熊大珍张峰涛赵玉灵李志勇王慧勇裴渊超
Owner HENAN NORMAL UNIV
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