A kind of bimetal composite n-pentylimidazolium thiocyanate ionic liquid and its preparation method and its application in CO treatment

A technology of amyl imidazole thiocyanate and ionic liquid, which is applied in the field of new materials for waste gas treatment, can solve the problems that the absorption capacity is greatly affected by temperature, the viscosity of ionic liquid is large, and the cycle performance is deteriorated, so as to promote CO diffusion and optimize Absorption performance, effect of improving adsorption capacity

Active Publication Date: 2022-05-10
苏州仕净科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ionic liquids used in the field of CO absorption reported in the literature are mainly aprotic ionic liquids, but they all have low absorption capacity, high viscosity of ionic liquids, poor cycle stability, slow absorption rate, and large absorption capacity affected by temperature, etc. question
Because CO is a stable neutral gas containing σ-π coordination bonds, it is easy to form π-complexes with transition metals in the D region. Therefore, in recent years, some studies have reported the use of functionalized cuprous salt ionic liquids for CO Absorption and separation, but the absorption capacity is low and there is a phenomenon of poor cycle performance

Method used

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  • A kind of bimetal composite n-pentylimidazolium thiocyanate ionic liquid and its preparation method and its application in CO treatment
  • A kind of bimetal composite n-pentylimidazolium thiocyanate ionic liquid and its preparation method and its application in CO treatment
  • A kind of bimetal composite n-pentylimidazolium thiocyanate ionic liquid and its preparation method and its application in CO treatment

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Experimental program
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Effect test

Embodiment 1

[0035] This embodiment prepares a kind of bimetallic composite N-amyl imidazole thiocyanate ionic liquid, wherein the molar ratio of N-amyl imidazole thiocyanate, cuprous thiocyanate, magnesium thiocyanate in the ionic liquid is 1 :1:1, specifically includes the following steps:

[0036] (1) Synthesis of N-amyl imidazolium thiocyanate ionic liquid:

[0037] Using acetone as solvent, add N-pentylimidazole hydrochloride (17.4 g, 0.1 mol) and sodium thiocyanate (8.1 g, 0.1 mol) into the flask, stir at room temperature for 24 h, rotary evaporate, and extract and separate with chloroform To obtain an ionic liquid, the obtained ionic liquid was washed several times with deionized water until AgNO was added to the washed water 3 After that, no precipitation occurred, and finally rotary evaporation was performed, and vacuum drying was performed at 80°C for 6 h to obtain 16.8 g of N-pentylimidazolium thiocyanate ionic liquid.

[0038] (2) Synthesis of cuprous thiocyanate / magnesium thio...

Embodiment 2

[0041] This embodiment prepares a kind of bimetallic composite N-amyl imidazole thiocyanate ionic liquid, wherein the molar ratio of N-amyl imidazole thiocyanate, cuprous thiocyanate, magnesium thiocyanate in the ionic liquid is 1 :1.5:1.5, specifically including the following steps:

[0042] (1) Synthesis of N-amyl imidazolium thiocyanate ionic liquid:

[0043] Using acetone as solvent, add N-pentylimidazole hydrochloride (17.4 g, 0.1 mol) and sodium thiocyanate (8.1 g, 0.1 mol) into the flask, stir at room temperature for 24 h, rotary evaporate, and extract and separate with chloroform To obtain an ionic liquid, the obtained ionic liquid was washed several times with deionized water until AgNO was added to the washed water 3 After that, no precipitation occurred, and finally rotary evaporation was carried out, and vacuum drying was carried out at 80°C for 6 h to obtain 16.8 g of N-pentylimidazolium thiocyanate ionic liquid.

[0044] (2) Synthesis of cuprous thiocyanate / mag...

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Abstract

The invention discloses a double-metal composite N-pentylimidazole thiocyanate ionic liquid and its preparation method and its application in CO treatment. , magnesium thiocyanate, heated and stirred to obtain a homogeneous liquid, which can still maintain a liquid state at room temperature; the bimetallic N-pentylimidazole thiocyanate ionic liquid can selectively absorb CO, and has a The equilibrium absorption capacity reaches 0.229mol / mol composite ionic liquid, and has good CO cycle absorption performance, in CO absorption and CO / N 2 The field of separation materials has a good application prospect.

Description

technical field [0001] The invention relates to the field of new materials for waste gas treatment, in particular to a bimetallic composite N-pentylimidazolium thiocyanate ionic liquid, a preparation method thereof, and an application in CO treatment. Background technique [0002] Carbon monoxide (CO) mainly exists in industrial mixed gases such as synthesis gas, flue gas, coke oven gas, and blast furnace gas. As a highly toxic gas, CO is inhaled and combined with hemoglobin to cause poisoning. Chemical resources can be converted into many high value-added products such as alcohols, aldehydes, acids and esters. Therefore, it is of great industrial, environmental and scientific value to develop a high-efficiency and energy-saving CO separation and removal technology to meet the separation, purification and purification requirements of CO from industrial gases. [0003] Traditional CO separation methods include cryogenic separation, solution absorption, solid adsorption, memb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/58B01D53/78B01D53/62B01D53/96
CPCC07D233/58B01D53/78B01D53/62B01D53/96B01D2257/502Y02A50/20
Inventor 辛丰董仕宏何文
Owner 苏州仕净科技股份有限公司
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