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A kind of functionalized ionic liquid and its preparation method and application

An ionic liquid and functional technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as insolubility, limited development prospects of ionic liquid solutions, and low solubility, and achieve high-efficiency absorption performance and good stability and reusability, easy regeneration effect

Active Publication Date: 2021-10-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the ionic liquids currently available are usually easily soluble in water, but their solubility in organic solvents such as alcohols is low or even insoluble, which limits the selection and development prospects of ionic liquid solutions

Method used

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  • A kind of functionalized ionic liquid and its preparation method and application
  • A kind of functionalized ionic liquid and its preparation method and application
  • A kind of functionalized ionic liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Synthesis of novel functionalized ionic liquid

[0032] In the first step, tetraethylenepentamine (TEPA), 5-aminoimidazole-4-carboxamide (AICA), ethanol and deionized water are mixed, wherein the mol ratio of TEPA and AICA is 1:1, and the mixed solution is heated at 1600r / min speed stirring at 40 ℃ constant temperature reaction for 24h;

[0033] The second step is to distill the reacted solution under reduced pressure at 70°C for 4 hours to constant weight by vacuum distillation, remove unreacted raw materials and excess deionized water and ethanol in the ionic liquid, and then put it in a vacuum In a drying oven, set the temperature at 70°C for 24 hours. Finally, a novel functionalized ionic liquid tetraethylenepentamine-5-aminoimidazole-4-carboxamide salt, namely [TEPAH][AICA], was obtained.

[0034] In the present invention, a polyamine, TEPA, is selected as the cation used to synthesize the novel functionalized ionic liquid. TEPA contains multiple ...

Embodiment 2

[0037] Embodiment 2: Novel functionalized ionic liquid is used as absorbent

[0038] Dissolve [TEPAH][AICA] in a mixed solution of n-propanol (NPA) and ethylene glycol (EG), set the volume to 250mL, and prepare a 0.5mol / L ionic liquid solution. The ionic liquid solution was placed in a constant temperature water bath at 40°C, and its temperature reached the set temperature of 40°C for later use.

experiment example 1

[0045] Experimental Example 1: Absorption properties of a new functionalized ionic liquid solution [TEPAH][AICA] / NPA / EG

[0046] At 40°C, take 25mL of the [TEPAH][AICA] / NPA / EG solution in Example 2 and the MEA aqueous solution in Comparative Examples 1 and 2 and [N 1111 ][2-MI] / NPA / EG solution, pour them into 50mL bubbling absorption bottles respectively, and place them in a constant temperature water bath at 40°C to keep warm to 40°C, and then add 15% (V / V) CO 2 Mixed gas until the solution is absorbed and saturated, and the gas flow rate is 240mL / min. Use the soap film flowmeter to record the outlet flow of the bubbling absorption bottle, and calculate the absorption rate and absorption load of the absorption solution according to the flow difference between the inlet and outlet of the gas. The results are as follows figure 2 shown.

[0047] Depend on figure 2 It can be seen that MEA aqueous solution and [N 1111 The absorption load of ][2-MI] / NPA / EG solution is 0.52mo...

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Abstract

The invention discloses a novel functionalized ionic liquid and its preparation method and application. Its molecular composition is tetraethylenepentamine-5-aminoimidazole-4-carboxamide salt, and its molecular formula is [TEPAH][AICA] , the structural formula is as shown in formula I. The preparation method has the advantages of simple preparation, easy operation and implementation. The novel functionalized ionic liquid of the present invention as CO 2 Absorbent, has good solubility in solvents such as water and alcohol, and the formed ionic liquid solution can be used to capture or separate CO in gas 2 . The absorbent not only has efficient CO 2 It has good absorption capacity, good stability and reusability, and is easy to regenerate, with low regeneration energy consumption. Can effectively overcome the absorption of CO by traditional organic amines and conventional ionic liquids 2 The defects provide new ideas for the future industrial application of ionic liquids.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture and separation, in particular to a novel functionalized ionic liquid and a preparation method thereof and the method for capturing or separating CO in a mixed gas. 2 Applications. Background technique [0002] Global warming will lead to melting of glaciers, extreme weather disasters, crop yield reduction, ecological system imbalance, tropical infectious diseases and other problems, posing a serious threat to human survival and development. The Special Report on Emission Scenarios of the Intergovernmental Panel on Climate Change (IPCC) predicts that global greenhouse gas emissions will increase by 25%-90% during 2000-2030 (CO 2 equivalent), it is estimated that the next 20 years will increase at a rate of about 0.2°C per decade. To prevent global warming, the international community is paying more and more attention to the issue of greenhouse gas emissions such as carbon dioxide. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/20B01D2252/30Y02A50/20Y02C20/40
Inventor 李伟刘凡李素静沈遥沈丽张宇驰
Owner ZHEJIANG UNIV
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